Goiás, Brazil (original) (raw)

ⓘ Acanthite

Formula: Ag2S

ⓘ Actinolite

Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2

Localities: Reported from at least 13 localities in this region.

ⓘ Aegirine

Formula: NaFe3+Si2O6

ⓘ Aegirine-augite

Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6

ⓘ Albite

Formula: Na(AlSi3O8)

Localities: Reported from at least 19 localities in this region.

ⓘ Albite var. Andesine

Formula: (Na,Ca)[Al(Si,Al)Si2O8]

Localities:

Crixás gold field, Goiás, Brazil
Mangabal I intrusion, Sanclerlândia, Goiás, Brazil
Orebody IV, Mina III, Crixás, Crixás gold field, Goiás, Brazil

ⓘ Albite var. Oligoclase

Formula: (Na,Ca)[Al(Si,Al)Si2O8]

Localities:

Crixás, Crixás gold field, Goiás, Brazil
Vaca Velha claim, Sucuri massif, Teresina de Goiás, Goiás, Brazil
Levantina quarry, Montividiu do Norte, Goiás, Brazil
Santa Fé deposit, Santa Fé de Goiás, Goiás, Brazil
Orebody IV, Mina III, Crixás, Crixás gold field, Goiás, Brazil

ⓘ Aleksite

Formula: PbBi2Te2S2

ⓘ 'Allanite Group'

Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

Localities:

Posse Mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Sucuri massif, Teresina de Goiás, Goiás, Brazil
Orebody IV, Mina III, Crixás, Crixás gold field, Goiás, Brazil

ⓘ Almandine

Formula: Fe2+3Al2(SiO4)3

Localities:

Santa Cruz, Pires do Rio, Goiás, Brazil
Chapada Mine, Alto Horizonte, Goiás, Brazil
Levantina quarry, Montividiu do Norte, Goiás, Brazil
Mina III, Crixás, Crixás gold field, Goiás, Brazil

ⓘ Alstonite

Formula: BaCa(CO3)2

ⓘ Alunite

Formula: KAl3(SO4)2(OH)6

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Amarillite

Formula: NaFe(SO4)2 · 6H2O

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ 'Amphibole Supergroup'

Formula: A B2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2

Localities: Reported from at least 8 localities in this region.

ⓘ Analcime

Formula: Na(AlSi2O6) · H2O

ⓘ Anatase

Formula: TiO2

ⓘ 'Ancylite'

ⓘ Andradite

Formula: Ca3Fe3+2(SiO4)3

ⓘ Anhydrite

Formula: CaSO4

ⓘ Ankerite

Formula: Ca(Fe2+,Mg)(CO3)2

Localities: Reported from at least 6 localities in this region.

ⓘ Anorthite

Formula: Ca(Al2Si2O8)

ⓘ Anorthite var. Labradorite

Formula: (Ca,Na)[Al(Al,Si)Si2O8]

ⓘ Anthophyllite

Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2

Localities:

Zacarias mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Mangabal I intrusion, Sanclerlândia, Goiás, Brazil
Chapada Mine, Alto Horizonte, Goiás, Brazil

ⓘ 'Apatite'

Formula: Ca5(PO4)3(Cl/F/OH)

Localities: Reported from at least 14 localities in this region.

ⓘ 'Apatite var. Collophane'

ⓘ Arsenopyrite

Formula: FeAsS

Localities: Reported from at least 13 localities in this region.

Description: In quartz-topaz rock (topazite).

ⓘ Baddeleyite

Formula: ZrO2

Localities:

Arenópolis REE deposit, Arenópolis, Goiás, Brazil
Boa Vista Mine, Catalão, Goiás, Brazil
Cedrolina chromitite body, Santa Terezinha de Goiás, Santa Terezinha de Goiás district, Goiás, Brazil
Catalão II carbonatite complex, Catalão, Goiás, Brazil

ⓘ Baryte

Formula: BaSO4

Localities: Reported from at least 8 localities in this region.

ⓘ Beryl

Formula: Be3Al2(Si6O18)

Localities: Reported from at least 7 localities in this region.

ⓘ Beryl var. Emerald

Formula: Be3Al2(Si6O18)

Localities:

Emerald mines, Campos Verdes, Santa Terezinha de Goiás district, Goiás, Brazil
Emerald locality, Pirenópolis, Goiás, Brazil
Mara Rosa district, Goiás, Brazil
Porangatu deposit, Porangatu, Goiás, Brazil
Goiás, Brazil

ⓘ Betekhtinite

Formula: Pb2(Cu,Fe)22-24S15

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Beyerite

Formula: Ca(BiO)2(CO3)2

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ 'Biotite'

Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Localities: Reported from at least 21 localities in this region.

ⓘ Bismite

Formula: Bi2O3

ⓘ Bismuth

Formula: Bi

ⓘ Bismuthinite

Formula: Bi2S3

Localities:

Periquito mine, Mangabeira tin deposit, Monte Alegre de Goiás, Goiás, Brazil
Maria Lázara Mine, Guarinos, Goiás, Brazil
Buraco do Ouro mine, Cavalcante, Goiás, Brazil

Description: In quartz-topaz rock (topazite).

ⓘ Bismutite

Formula: (BiO)2CO3

ⓘ 'Bismutomicrolite (of Hogarth 1977)'

ⓘ Bohdanowiczite

Formula: AgBiSe2

References:

Botelho, N.F., Moura, M.A., Peterson, R.C., Stanley, C.J., Silva, D.V.G. (2006): Kalungaite, PdAsSe, a new platinum-group mineral from the Buraco do Ouro gold mine, Cavalcante, Goiás State, Brazil. Mineralogical Magazine, 70, 123-130

ⓘ Böhmite

Formula: AlO(OH)

ⓘ Bornite

Formula: Cu5FeS4

ⓘ Boulangerite

Formula: Pb5Sb4S11

ⓘ Bournonite

Formula: PbCuSbS3

ⓘ Brochantite

Formula: Cu4(SO4)(OH)6

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Burbankite

Formula: (Na,Ca)3(Sr,Ba,Ce)3(CO3)5

ⓘ Cahnite

Formula: Ca2[B(OH)4](AsO4)

ⓘ Calaverite

Formula: AuTe2

ⓘ 'Calciopyrochlore'

References:

Pedro Filipe de Oliveira Cordeiro, José Affonso Brod, Matheus Palmieri, Claudinei Gouveia de Oliveira, Elisa Soares Rocha Barbosa, Roberto Ventura Santos, José Carlos Gaspar, Luis Carlos Assis (2011): The Catalão I niobium deposit, central Brazil: Resources, geology and pyrochlore chemistry. Ore Geology Reviews 41, 112-121.

ⓘ Calcite

Formula: CaCO3

Localities: Reported from at least 12 localities in this region.

ⓘ 'Calcium Amphibole Subgroup var. Hornblende'

References:

Amaral, Pedro Augusto Costa do, Borges, Welitom Rodrigues, Toledo, Catarina Labouré Bemfica, Silva, Adalene Moreira, Godoy, Hygor Viana, Leão Santos, Marcelo Henrique (2023) Electrical Prospecting of Gold Mineralization in Exhalites of the Digo-Digo VMS Occurrence, Central Brazil. Minerals, 13 (12) doi:10.3390/min13121483

ⓘ Cancrinite

Formula: (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O

ⓘ Cannonite

Formula: Bi2(SO4)O(OH)2

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Cassiterite

Formula: SnO2

Localities: Reported from at least 9 localities in this region.

Description: In greisens.

ⓘ Chalcocite

Formula: Cu2S

ⓘ Chalcopyrite

Formula: CuFeS2

Localities: Reported from at least 20 localities in this region.

Description: In quartz-topaz rock (topazite).

ⓘ Chamosite

Formula: (Fe2+)5Al(Si,Al)4O10(OH,O)8

References:

de Oliveira, P. D. T. F., Pimentel, M. M., Santos, R. V., & Junges, S. L. (2003). Sm–Nd studies at Mina III gold deposit, Crixás greenstone belt, central Brazil: implications for the depositional age of the upper metasedimentary rocks and associated Au mineralization. Journal of South American Earth Sciences, 16(6), 503-512.

ⓘ Chenevixite

Formula: Cu2Fe3+2(AsO4)2(OH)4

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ 'Chlorite Group'

Localities: Reported from at least 16 localities in this region.

ⓘ Chloritoid

Formula: Fe2+Al2O(SiO4)(OH)2

References:

de Oliveira, P. D. T. F., Pimentel, M. M., Santos, R. V., & Junges, S. L. (2003). Sm–Nd studies at Mina III gold deposit, Crixás greenstone belt, central Brazil: implications for the depositional age of the upper metasedimentary rocks and associated Au mineralization. Journal of South American Earth Sciences, 16(6), 503-512.

ⓘ 'Chrome-Spinel (of Dana)'

Localities:

Mangabal I intrusion, Sanclerlândia, Goiás, Brazil
Mangabal II intrusion, Sanclerlândia, Goiás, Brazil
Northern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil

ⓘ Chromite

Formula: Fe2+Cr3+2O4

Localities: Reported from at least 7 localities in this region.

ⓘ Chrysoberyl

Formula: BeAl2O4

ⓘ Chrysoberyl var. Alexandrite

Formula: BeAl2O4

ⓘ 'Chrysoprase'

ⓘ Chrysotile

Formula: Mg3(Si2O5)(OH)4

ⓘ Clausthalite

Formula: PbSe

References:

Botelho, N.F., Moura, M.A., Peterson, R.C., Stanley, C.J., Silva, D.V.G. (2006): Kalungaite, PdAsSe, a new platinum-group mineral from the Buraco do Ouro gold mine, Cavalcante, Goiás State, Brazil. Mineralogical Magazine, 70, 123-130

ⓘ Clinochlore

Formula: Mg5Al(AlSi3O10)(OH)8

ⓘ Clinochlore var. Ripidolite

Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8

References:

Campos, L. M., Toledo, C. L. B., Silva, A. M., Ducart, D. F., dos Santos, B. A., Campos, M. P., & Borges, C. C. A. (2022). The hydrothermal footprint of the Crixás deposit: New vectors for orogenic gold exploration in central Brazil. Ore Geology Reviews, 146, 104925.

ⓘ 'Clinopyroxene Subgroup'

Localities: Reported from at least 6 localities in this region.

ⓘ Clinozoisite

Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)

ⓘ Cohenite

Formula: Fe3C

ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'

ⓘ 'Columbite-Tantalite'

ⓘ Copper

Formula: Cu

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Corundum

Formula: Al2O3

ⓘ Corundum var. Ruby

Formula: Al2O3

ⓘ Corundum var. Sapphire

Formula: Al2O3

ⓘ Covellite

Formula: CuS

Localities: Reported from at least 6 localities in this region.

Description: In quartz-topaz rock (topazite).

ⓘ Cubanite

Formula: CuFe2S3

ⓘ Cummingtonite

Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2

ⓘ Danalite

Formula: Be3Fe2+4(SiO4)3S

ⓘ Diamond

Formula: C

ⓘ Diaspore

Formula: AlO(OH)

ⓘ Digenite

Formula: Cu9S5

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Diopside

Formula: CaMgSi2O6

ⓘ Dolomite

Formula: CaMg(CO3)2

Localities: Reported from at least 6 localities in this region.

ⓘ Dolomite var. Iron-bearing Dolomite

Formula: Ca(Mg,Fe)(CO3)2

References:

de Oliveira, P. D. T. F., Pimentel, M. M., Santos, R. V., & Junges, S. L. (2003). Sm–Nd studies at Mina III gold deposit, Crixás greenstone belt, central Brazil: implications for the depositional age of the upper metasedimentary rocks and associated Au mineralization. Journal of South American Earth Sciences, 16(6), 503-512.

ⓘ Dravite

Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)

ⓘ Dzhalindite

Formula: In(OH)3

Description: In quartz-topaz rock (topazite).

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Elbaite

Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)

ⓘ Enargite

Formula: Cu3AsS4

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Enstatite

Formula: Mg2Si2O6

ⓘ Enstatite var. Bronzite

Formula: (Mg,Fe2+)2[SiO3]2

ⓘ Epidote

Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)

Localities: Reported from at least 12 localities in this region.

ⓘ Erlichmanite

Formula: OsS2

ⓘ Eudidymite

Formula: Na2Be2Si6O15 · H2O

ⓘ 'Fayalite-Forsterite Series'

Localities: Reported from at least 8 localities in this region.

ⓘ 'Feldspar Group'

Localities:

Catalão I carbonatite complex, Catalão, Goiás, Brazil
Catalão II carbonatite complex, Catalão, Goiás, Brazil
Catalão No. 1 mine, Ouvidor, Goiás, Brazil
Periquito mine, Mangabeira tin deposit, Monte Alegre de Goiás, Goiás, Brazil
Faixa Placha, Goiás, Brazil

ⓘ 'Feldspar Group var. Perthite'

Description: Microperthite microcline.

ⓘ Ferberite

Formula: FeWO4

Description: In quartz-topaz rock (topazite).

ⓘ 'Ferritchromit'

References:

Machado, M. L., Porto, C. G., Santoro, L., Putzolu, F., Neumann, R., Bastos Neto, A., ... & Herrington, R. (2021). The origin of supergene nickeliferous chlorite in the Santa Fé Ni-Laterite Deposit, GO, Brazil. Brazilian Journal of Geology, 51.

ⓘ Ferro-actinolite

Formula: ◻Ca2Fe2+5(Si8O22)(OH)2

ⓘ Ferrokësterite

Formula: Cu2FeSnS4

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Ferroselite

Formula: FeSe2

ⓘ Ferro-tschermakite

Formula: ◻{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2

ⓘ 'Florencite'

ⓘ Fluorapatite

Formula: Ca5(PO4)3F

Localities:

Catalão I carbonatite complex, Catalão, Goiás, Brazil
Vaca Velha claim, Sucuri massif, Teresina de Goiás, Goiás, Brazil
Levantina quarry, Montividiu do Norte, Goiás, Brazil
Sucuri massif, Teresina de Goiás, Goiás, Brazil

ⓘ Fluorite

Formula: CaF2

Localities: Reported from at least 7 localities in this region.

Description: In greisens.

ⓘ Forsterite

Formula: Mg2SiO4

ⓘ 'Freibergite Subgroup'

Formula: (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1

ⓘ Frohbergite

Formula: FeTe2

ⓘ Gahnite

Formula: ZnAl2O4

ⓘ Galena

Formula: PbS

Localities: Reported from at least 13 localities in this region.

Description: In quartz-topaz rock (topazite).

ⓘ 'Garnet Group'

Formula: X3Z2(SiO4)3

Localities: Reported from at least 11 localities in this region.

ⓘ Gedrite

Formula: ◻{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2

ⓘ Genthelvite

Formula: Be3Zn4(SiO4)3S

ⓘ Geversite

Formula: PtSb2

ⓘ Gibbsite

Formula: Al(OH)3

Localities: Reported from at least 6 localities in this region.

ⓘ 'Glass'

ⓘ Goethite

Formula: α-Fe3+O(OH)

Localities: Reported from at least 10 localities in this region.

ⓘ Gold

Formula: Au

Localities: Reported from at least 22 localities in this region.

ⓘ Gold var. Electrum

Formula: (Au,Ag)

Localities:

Cachoeira do Ogó claim, Pilar de Goiás belt, Pilar de Goiás, Goiás, Brazil
Zacarias mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Buraco do Ouro mine, Cavalcante, Goiás, Brazil

ⓘ Gorceixite

Formula: BaAl3(PO4)(PO3OH)(OH)6

Localities:

Paranaíba river, Goiás, Brazil
Verissimo river, Ipameri, Goiás, Brazil
Catalão I carbonatite complex, Catalão, Goiás, Brazil
Catalão No. 1 mine, Ouvidor, Goiás, Brazil

Description: Occurs as pebbles (favas) in diamantiferous river sands.

ⓘ Goudeyite

Formula: AlCu6(AsO4)3(OH)6 · 3H2O

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Goyazite

Formula: SrAl3(PO4)(PO3OH)(OH)6

Localities:

Catalão I carbonatite complex, Catalão, Goiás, Brazil
Catalão II carbonatite complex, Catalão, Goiás, Brazil
Catalão No. 1 mine, Ouvidor, Goiás, Brazil
Boa Vista Mine, Catalão, Goiás, Brazil

ⓘ Graphite

Formula: C

Localities:

Crixás, Crixás gold field, Goiás, Brazil
Cominas, Mara Rosa, Mara Rosa district, Goiás, Brazil
Sorongo claim, Mara Rosa, Mara Rosa district, Goiás, Brazil
Filó claim, Mara Rosa, Mara Rosa district, Goiás, Brazil
Buraco do Ouro mine, Cavalcante, Goiás, Brazil

ⓘ Gregoryite

Formula: (Na2,K2,Ca)CO3

ⓘ Grunerite

Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2

References:

de Oliveira, P. D. T. F., Pimentel, M. M., Santos, R. V., & Junges, S. L. (2003). Sm–Nd studies at Mina III gold deposit, Crixás greenstone belt, central Brazil: implications for the depositional age of the upper metasedimentary rocks and associated Au mineralization. Journal of South American Earth Sciences, 16(6), 503-512.

ⓘ Guanajuatite

Formula: Bi2Se3

References:

Botelho, N.F., Moura, M.A., Peterson, R.C., Stanley, C.J., Silva, D.V.G. (2006): Kalungaite, PdAsSe, a new platinum-group mineral from the Buraco do Ouro gold mine, Cavalcante, Goiás State, Brazil. Mineralogical Magazine, 70, 123-130

ⓘ Heazlewoodite

Formula: Ni3S2

ⓘ Hedenbergite

Formula: CaFe2+Si2O6

References:

Coldebella, B., Azzone, R. G., Chmyz, L., Ruberti, E., & Svisero, D. P. (2020). Oxygen fugacity of Alto Paranaíba kimberlites and diamond instability: Três Ranchos IV and Limeira I intrusions. Brazilian Journal of Geology, 50.

ⓘ Helvine

Formula: Be3Mn2+4(SiO4)3S

ⓘ Hematite

Formula: Fe2O3

Localities: Reported from at least 14 localities in this region.

ⓘ Hinsdalite

Formula: PbAl3(PO4)(SO4)(OH)6

ⓘ Hollandite

Formula: Ba(Mn4+6Mn3+2)O16

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Hollingworthite

Formula: (Rh,Pt,Pd)AsS

ⓘ 'Hornblende Root Name Group'

Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2

Localities:

Crixás, Crixás gold field, Goiás, Brazil
Inglesa mine (Chapéu do Sol claim), Crixás, Crixás gold field, Goiás, Brazil
Orebody IV, Mina III, Crixás, Crixás gold field, Goiás, Brazil
Northern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil
Southern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil

ⓘ Ilmenite

Formula: Fe2+TiO3

Localities: Reported from at least 17 localities in this region.

Description: In Li-siderophyllite granite.

ⓘ Iodargyrite

Formula: AgI

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Irarsite

Formula: (Ir,Ru,Rh,Pt)AsS

Localities:

Niquelândia, Goiás, Brazil
Cromínia, Goiás, Brazil
Morro Feio, Hidrolândia, Goiás, Brazil
Cedrolina chromitite body, Santa Terezinha de Goiás, Santa Terezinha de Goiás district, Goiás, Brazil
Niquelândia complex, Niquelândia, Goiás, Brazil

ⓘ Iron

Formula: Fe

ⓘ Iron var. Kamacite

Formula: (Fe,Ni)

ⓘ Isoferroplatinum

Formula: Pt3Fe

ⓘ Isomertieite

Formula: Pd11Sb2As2

ⓘ Jarosite

Formula: KFe3+3(SO4)2(OH)6

ⓘ Kalsilite

Formula: KAlSiO4

ⓘ Kalungaite (TL)

Formula: PdAsSe

Type Locality:

References:

Botelho, N.F., Moura, M.A., Peterson, R.C., Stanley, C.J., Silva, D.V.G. (2006): Kalungaite, PdAsSe, a new platinum-group mineral from the Buraco do Ouro gold mine, Cavalcante, Goiás State, Brazil. Mineralogical Magazine, 70, 123-130

ⓘ Kaolinite

Formula: Al2(Si2O5)(OH)4

Localities: Reported from at least 10 localities in this region.

ⓘ Kashinite

Formula: Ir2S3

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ 'K Feldspar'

Localities:

Vaca Velha claim, Sucuri massif, Teresina de Goiás, Goiás, Brazil
Sucuri massif, Teresina de Goiás, Goiás, Brazil
Levantina quarry, Montividiu do Norte, Goiás, Brazil
Pela Ema Mine, Minaçu, Goiás, Brazil
Pelotas mine, Monte Alegre de Goiás, Goiás, Brazil

ⓘ Kotulskite

Formula: Pd(Te,Bi)2-x (x ≈ 0.4)

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ Krut'aite

Formula: CuSe2

ⓘ Kyanite

Formula: Al2(SiO4)O

Localities:

Zacarias mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Serra Dourada, Minaçu, Goiás, Brazil
Chapada Mine, Alto Horizonte, Goiás, Brazil
Posse Mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Morro do Caranã, Estrela do Norte, Mara Rosa district, Goiás, Brazil

ⓘ Laurite

Formula: RuS2

Localities:

Niquelândia, Goiás, Brazil
Cromínia, Goiás, Brazil
Morro Feio, Hidrolândia, Goiás, Brazil
Cedrolina chromitite body, Santa Terezinha de Goiás, Santa Terezinha de Goiás district, Goiás, Brazil
Niquelândia complex, Niquelândia, Goiás, Brazil

ⓘ Lepidocrocite

Formula: γ-Fe3+O(OH)

ⓘ Leucite

Formula: K(AlSi2O6)

ⓘ 'Leucoxene'

ⓘ 'Limonite'

ⓘ Lithiophorite

Formula: (Al,Li)MnO2(OH)2

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Lizardite

Formula: Mg3(Si2O5)(OH)4

References:

Machado, M. L., Porto, C. G., Santoro, L., Putzolu, F., Neumann, R., Bastos Neto, A., ... & Herrington, R. (2021). The origin of supergene nickeliferous chlorite in the Santa Fé Ni-Laterite Deposit, GO, Brazil. Brazilian Journal of Geology, 51.

ⓘ Löllingite

Formula: FeAs2

Description: In quartz-topaz rock (topazite).

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Loparite

Formula: (Na,REE)2Ti2O6

ⓘ Magnesio-hornblende

Formula: ◻Ca2(Mg4Al)(Si7Al)O22(OH)2

ⓘ Magnesite

Formula: MgCO3

ⓘ Magnetite

Formula: Fe2+Fe3+2O4

Localities: Reported from at least 22 localities in this region.

Description: In Li-siderophyllite granite.

ⓘ Magnetite var. Titanium-bearing Magnetite

Formula: Fe2+(Fe3+,Ti)2O4

ⓘ Malachite

Formula: Cu2(CO3)(OH)2

Description: In quartz-topaz rock (topazite).

ⓘ Malanite

Formula: Cu1+(Ir3+Pt4+)S4

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ Maldonite

Formula: Au2Bi

ⓘ Melanterite

Formula: Fe2+(H2O)6SO4 · H2O

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ 'Melilite Group'

Formula: Ca2M(XSiO7)

ⓘ Merenskyite

Formula: PdTe2

ⓘ Mertieite

Formula: Pd8Sb2.5As0.5

ⓘ Metazeunerite

Formula: Cu(UO2)2(AsO4)2 · 8H2O

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ 'Mica Group'

ⓘ Microcline

Formula: K(AlSi3O8)

Localities: Reported from at least 8 localities in this region.

ⓘ 'Microlite Group'

Formula: A2-mTa2X6-wZ-n

ⓘ Millerite

Formula: NiS

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ Mogánite ?

Formula: SiO2

ⓘ Molybdenite

Formula: MoS2

Localities:

Maria Lázara Mine, Guarinos, Goiás, Brazil
Chapada Mine, Alto Horizonte, Goiás, Brazil
Zacarias mine, Mara Rosa, Mara Rosa district, Goiás, Brazil

ⓘ Monazite-(Ce)

Formula: Ce(PO4)

ⓘ 'Monazite Group'

Formula: REE(PO4)

Localities: Reported from at least 10 localities in this region.

Description: In Li-siderophyllite granite.

ⓘ Monazite-(La)

Formula: La(PO4)

ⓘ Moncheite

Formula: Pt(Te,Bi)2

ⓘ Morimotoite

Formula: Ca3(TiFe2+)(SiO4)3

ⓘ Muscovite

Formula: KAl2(AlSi3O10)(OH)2

Localities: Reported from at least 22 localities in this region.

ⓘ Muscovite var. Fuchsite

Formula: K(Al,Cr)3Si3O10(OH)2

ⓘ Muscovite var. Illite

Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2

ⓘ Muscovite var. Oellacherite

Formula: KAl2(AlSi3O10)(OH)2

ⓘ Muscovite var. Phengite

Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2

Description: Aluminium-phengite in Li-siderophyllite granite. Phengite replaces Li-siderophyllite. Lithium-phengite in topaz-albite granite.

ⓘ Muscovite var. Sericite

Formula: KAl2(AlSi3O10)(OH)2

Localities: Reported from at least 9 localities in this region.

ⓘ Natrolite

Formula: Na2Al2Si3O10 · 2H2O

ⓘ 'Natropyrochlore'

References:

Pedro Filipe de Oliveira Cordeiro, José Affonso Brod, Matheus Palmieri, Claudinei Gouveia de Oliveira, Elisa Soares Rocha Barbosa, Roberto Ventura Santos, José Carlos Gaspar, Luis Carlos Assis (2011): The Catalão I niobium deposit, central Brazil: Resources, geology and pyrochlore chemistry. Ore Geology Reviews 41, 112-121.

ⓘ Nepheline

Formula: Na3K(Al4Si4O16)

Localities:

Catalão I carbonatite complex, Catalão, Goiás, Brazil
Arenópolis REE deposit, Arenópolis, Goiás, Brazil
Catalão No. 1 mine, Ouvidor, Goiás, Brazil
Amorinópolis complex, Amorinópolis, Goiás, Brazil

ⓘ Norsethite

Formula: BaMg(CO3)2

ⓘ Nyerereite

Formula: Na2Ca(CO3)2

ⓘ Olekminskite

Formula: Sr(Sr,Ca,Ba)(CO3)2

ⓘ 'Olivine Group'

Formula: M2SiO4

Localities:

Catalão II carbonatite complex, Catalão, Goiás, Brazil
Santa Fé deposit, Santa Fé de Goiás, Goiás, Brazil
Northern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil
Southern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil

ⓘ Orthoclase

Formula: K(AlSi3O8)

Localities:

Arenópolis REE deposit, Arenópolis, Goiás, Brazil
Inglesa mine (Chapéu do Sol claim), Crixás, Crixás gold field, Goiás, Brazil
Catalão II carbonatite complex, Catalão, Goiás, Brazil
Pela Ema Mine, Minaçu, Goiás, Brazil
Pelotas mine, Monte Alegre de Goiás, Goiás, Brazil

ⓘ 'Orthopyroxene Subgroup'

Localities:

Mangabal I intrusion, Sanclerlândia, Goiás, Brazil
Niquelândia complex, Niquelândia, Goiás, Brazil
Northern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil
Southern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil

ⓘ Osmium

Formula: (Os,Ir,Ru)

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ Osmium var. Iridosmine

Formula: (Os,Ir)

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ Padmaite

Formula: PdBiSe

References:

Botelho, N.F., Moura, M.A., Peterson, R.C., Stanley, C.J., Silva, D.V.G. (2006): Kalungaite, PdAsSe, a new platinum-group mineral from the Buraco do Ouro gold mine, Cavalcante, Goiás State, Brazil. Mineralogical Magazine, 70, 123-130

ⓘ Paragonite

Formula: NaAl2(AlSi3O10)(OH)2

Localities:

Mina III, Crixás, Crixás gold field, Goiás, Brazil
Maria Lázara Mine, Guarinos, Goiás, Brazil
Orebody IV, Mina III, Crixás, Crixás gold field, Goiás, Brazil

ⓘ Paraguanajuatite

Formula: Bi2Se3

ⓘ Pargasite

Formula: NaCa2(Mg4Al)(Si6Al2)O22(OH)2

References:

Augustin, C. T., Mungall, J. E., Schutesky, M. E., Ernst, R., & Garcia, V. B. (2022). Petrological and geochemical characteristics of the mafic-ultramafic Americano do Brasil Complex, central Brazil, and the implications for its genesis. Ore Geology Reviews, 105126.

ⓘ Pearceite ?

Formula: [Ag6As2S7][Ag9CuS4]

ⓘ Pentlandite

Formula: (NixFey)Σ9S8

Localities:

Nova Mine, Crixás, Crixás gold field, Goiás, Brazil
Niquelândia complex, Niquelândia, Goiás, Brazil
Northern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil
Southern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil

ⓘ Perovskite

Formula: CaTiO3

Localities: Reported from at least 7 localities in this region.

ⓘ Pharmacosiderite

Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Phenakite

Formula: Be2SiO4

Localities:

Periquito mine, Mangabeira tin deposit, Monte Alegre de Goiás, Goiás, Brazil
Sucuri massif, Teresina de Goiás, Goiás, Brazil
Vaca Velha claim, Sucuri massif, Teresina de Goiás, Goiás, Brazil

ⓘ Phlogopite

Formula: KMg3(AlSi3O10)(OH)2

Localities: Reported from at least 11 localities in this region.

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi2]O8

Localities: Reported from at least 12 localities in this region.

ⓘ Platinum

Formula: Pt

ⓘ 'Polylithionite-Trilithionite Series'

ⓘ Priderite

Formula: K(Ti4+7Fe3+)O16

ⓘ Pyrite

Formula: FeS2

Localities: Reported from at least 28 localities in this region.

ⓘ 'Pyrochlore Group'

Formula: A2Nb2(O,OH)6Z

Localities:

Catalão I carbonatite complex, Catalão, Goiás, Brazil
Catalão II carbonatite complex, Catalão, Goiás, Brazil
Caiapó river REE deposit, Arenópolis, Goiás, Brazil
Catalão No. 1 mine, Ouvidor, Goiás, Brazil
Boa Vista Mine, Catalão, Goiás, Brazil

ⓘ 'Pyrochlore Group var. Ceriopyrochlore (of Hogarth 1977)'

Formula: A2Nb2(O,OH)6Z

ⓘ 'Pyrochlore Group var. Zero valent dominant member of Pyrochlore Group'

Formula: A2Nb2(O,OH)6Z

ⓘ Pyrolusite

Formula: Mn4+O2

ⓘ Pyrope

Formula: Mg3Al2(SiO4)3

References:

Coldebella, B., Azzone, R. G., Chmyz, L., Ruberti, E., & Svisero, D. P. (2020). Oxygen fugacity of Alto Paranaíba kimberlites and diamond instability: Três Ranchos IV and Limeira I intrusions. Brazilian Journal of Geology, 50.

ⓘ 'Pyroxene Group'

Formula: ADSi2O6

Localities: Reported from at least 9 localities in this region.

ⓘ Pyrrhotite

Formula: Fe1-xS

Localities: Reported from at least 15 localities in this region.

ⓘ Quartz

Formula: SiO2

Localities: Reported from at least 46 localities in this region.

ⓘ Quartz var. Amethyst

Formula: SiO2

ⓘ Quartz var. Citrine

Formula: SiO2

Localities:

Catalão, Goiás, Brazil
Cristalina, Goiás, Brazil
Serra dos Cristais, Cristalina, Goiás, Brazil
Santa Luzia, Luziânia, Goiás, Brazil

ⓘ Quartz var. Rock Crystal

Formula: SiO2

Localities:

Cristalina, Goiás, Brazil
Catalão, Goiás, Brazil
Serra dos Cristais, Cristalina, Goiás, Brazil
Santa Luzia, Luziânia, Goiás, Brazil
Johann Egger rock crystal mine, Niquelândia, Goiás, Brazil

ⓘ Quartz var. Smoky Quartz

Formula: SiO2

Localities:

Catalão, Goiás, Brazil
Cristalina, Goiás, Brazil
Serra dos Cristais, Cristalina, Goiás, Brazil
Santa Luzia, Luziânia, Goiás, Brazil

ⓘ 'Rhabdophane'

ⓘ Richterite

Formula: Na(NaCa)Mg5(Si8O22)(OH)2

ⓘ Roquesite

Formula: CuInS2

Description: In quartz-topaz rock (topazite).

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Rutile

Formula: TiO2

Localities: Reported from at least 12 localities in this region.

ⓘ Rutile var. Ilmenorutile

Formula: (Ti,Nb)O2

ⓘ 'Scapolite'

ⓘ Scheelite

Formula: Ca(WO4)

Localities:

Vaca Velha claim, Sucuri massif, Teresina de Goiás, Goiás, Brazil
Periquito mine, Mangabeira tin deposit, Monte Alegre de Goiás, Goiás, Brazil
Faixa Placha, Goiás, Brazil
Faixa Placha, Goiás, Brazil

ⓘ Schorl

Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

ⓘ Schreibersite

Formula: (Fe,Ni)3P

ⓘ Scorodite

Formula: Fe3+AsO4 · 2H2O

Description: In quartz-topaz rock (topazite).

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Segnitite

Formula: PbFe3+3AsO4(AsO3OH)(OH)6

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Sepiolite

Formula: Mg4(Si6O15)(OH)2 · 6H2O

References:

Ratié, G., Jouvin, D., Garnier, J., Rouxel, O., Miska, S., Guimarães, E., ... & Thil, F. (2015). Nickel isotope fractionation during tropical weathering of ultramafic rocks. Chemical Geology, 402, 68-76

ⓘ 'Serpentine Subgroup'

Formula: D3[Si2O5](OH)4

Localities: Reported from at least 12 localities in this region.

ⓘ Siderite

Formula: FeCO3

ⓘ Siderophyllite

Formula: KFe2+2Al(Al2Si2O10)(OH)2

Description: Lithium-siderophyllite.

ⓘ Sillimanite

Formula: Al2(SiO4)O

Localities:

Posse Mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Zacarias mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Chapada Mine, Alto Horizonte, Goiás, Brazil

ⓘ 'Smectite Group'

Formula: A0.3D2-3[T4O10]Z2 · nH2O

ⓘ Sobolevskite

Formula: PdBi

ⓘ Sperrylite

Formula: PtAs2

ⓘ Spessartine

Formula: Mn2+3Al2(SiO4)3

ⓘ Sphalerite

Formula: ZnS

Localities: Reported from at least 10 localities in this region.

Description: In quartz-topaz rock (topazite).

ⓘ Spinel

Formula: MgAl2O4

Localities: Reported from at least 8 localities in this region.

ⓘ Stannite

Formula: Cu2FeSnS4

Description: In quartz-topaz rock (topazite).

ⓘ 'Stannite Group'

Formula: A2DEX4

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Staurolite

Formula: Fe2+2Al9Si4O23(OH)

Localities:

Zacarias mine, Mara Rosa, Mara Rosa district, Goiás, Brazil
Serra Dourada, Minaçu, Goiás, Brazil
Chapada Mine, Alto Horizonte, Goiás, Brazil

ⓘ Staurolite var. Zinc-bearing Staurolite

Formula: (Fe2+,Zn)2Al9Si4O23(OH)

ⓘ Stibiopalladinite

Formula: Pd5Sb2

References:

Botelho, N.F., Moura, M.A., Peterson, R.C., Stanley, C.J., Silva, D.V.G. (2006): Kalungaite, PdAsSe, a new platinum-group mineral from the Buraco do Ouro gold mine, Cavalcante, Goiás State, Brazil. Mineralogical Magazine, 70, 123-130

ⓘ Strontianite

Formula: SrCO3

ⓘ Stumpflite

Formula: PtSb

ⓘ Sudburyite

Formula: PdSb

References:

Garuti, G., Zaccarini, F., Proenza, J. A., Thalhammer, O. A., & Angeli, N. (2012). Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization and lateritic weathering. Minerals, 2(4), 365-384.

ⓘ Sulphotsumoite

Formula: Bi3Te2S

ⓘ Svanbergite

Formula: SrAl3(PO4)(SO4)(OH)6

ⓘ Taenite

Formula: (Fe,Ni)

ⓘ Talc

Formula: Mg3Si4O10(OH)2

Localities: Reported from at least 13 localities in this region.

ⓘ 'Tantalite'

Formula: (Mn,Fe)(Ta,Nb)2O6

ⓘ 'Tennantite Subgroup'

Formula: Cu6(Cu4C2+2)As4S12S

Description: In quartz-topaz rock (topazite).

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ Tetradymite

Formula: Bi2Te2S

ⓘ Tetraferriphlogopite

Formula: KMg3(Fe3+Si3O10)(OH,F)2

ⓘ Tetraferroplatinum

Formula: PtFe

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu6(Cu4C2+2)Sb4S12S

ⓘ Thorianite

Formula: ThO2

ⓘ Thorite

Formula: Th(SiO4)

ⓘ Tiemannite ?

Formula: HgSe

ⓘ Titanite

Formula: CaTi(SiO4)O

Localities: Reported from at least 6 localities in this region.

ⓘ Topaz

Formula: Al2(SiO4)(F,OH)2

ⓘ 'Tourmaline'

Formula: A D3G6 (T6O18)(BO3)3X3Z

Localities: Reported from at least 9 localities in this region.

ⓘ Tremolite

Formula: ◻Ca2Mg5(Si8O22)(OH)2

Localities:

Mina III, Crixás, Crixás gold field, Goiás, Brazil
Northern sequence, Americano do Brasil complex, Americano do Brasil, Goiás, Brazil
Digo-Digo occurrence, Goiás, Goiás, Brazil

ⓘ Troilite

Formula: FeS

ⓘ Tschermakite

Formula: ◻(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2

References:

Campos, L. M., Toledo, C. L. B., Silva, A. M., Ducart, D. F., dos Santos, B. A., Campos, M. P., & Borges, C. C. A. (2022). The hydrothermal footprint of the Crixás deposit: New vectors for orogenic gold exploration in central Brazil. Ore Geology Reviews, 146, 104925.

ⓘ Ulvöspinel

Formula: TiFe2+2O4

ⓘ 'UM2007-07-AsO:BaFeHK'

Formula: (Ba,K)Fe3+6(AsO4)5(O,OH)3 · 3H2O

ⓘ 'UM2007-08-AsO:FeHSn'

Formula: Sn9Fe8(AsO4)4O24 · 9H2O

ⓘ 'Unnamed (Pb-Bi Selenide)'

Formula: Pb-Bi-Se

ⓘ 'Unnamed (Sn-Fe Arsenate-Hydrate)'

Formula: Sn3Fe2(AsO4) · 3H2O

ⓘ Uraninite

Formula: UO2

ⓘ Variscite

Formula: AlPO4 · 2H2O

ⓘ Vauxite

Formula: Fe2+Al2(PO4)2(OH)2 · 6H2O

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ Vermiculite

Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O

Localities:

Catalão I carbonatite complex, Catalão, Goiás, Brazil
Catalão II carbonatite complex, Catalão, Goiás, Brazil
Catalão No. 1 mine, Ouvidor, Goiás, Brazil
Boa Vista Mine, Catalão, Goiás, Brazil
Santa Fé deposit, Santa Fé de Goiás, Goiás, Brazil

ⓘ Vivianite

Formula: Fe2+Fe2+2(PO4)2 · 8H2O

ⓘ 'Wad'

ⓘ Waylandite

Formula: BiAl3(PO4)2(OH)6

References:

Pires, G. L. C., Renac, C., Bongiolo, E. M., & Neumann, R. (2020). Gossan mineralogy, textures, and gold enrichment over the Au (As, Bi, Ag) deposit in the Buracão Area (Brasília Fold Belt, Brazil): Implications for gold prospecting in weathering profiles. Journal of Geochemical Exploration, 218, 106615.

ⓘ 'White mica'

ⓘ Witherite

Formula: BaCO3

ⓘ 'Wolframite Group'

Localities:

Vaca Velha claim, Sucuri massif, Teresina de Goiás, Goiás, Brazil
Periquito mine, Mangabeira tin deposit, Monte Alegre de Goiás, Goiás, Brazil
Sucuri massif, Teresina de Goiás, Goiás, Brazil
Faixa Placha, Goiás, Brazil
Faixa Placha, Goiás, Brazil

ⓘ 'Xenotime'

ⓘ Xenotime-(Y)

Formula: Y(PO4)

ⓘ Yanomamite (TL)

Formula: InAsO4 · 2H2O

Type Locality:

Description: In quartz-topaz rock (topazite).

References:

Moura, Márcia A., Botelho, Nilson F., Olivo, Gema R., Kyser, Kurt, Pontes, Rodrigo M. (2014) Genesis of the Proterozoic Mangabeira tin–indium mineralization, Central Brazil: Evidence from geology, petrology, fluid inclusion and stable isotope data. Ore Geology Reviews, 60. 36-49 doi:10.1016/j.oregeorev.2013.12.010

ⓘ 'Zinnwaldite'

Description: In topaz-albite granite.

ⓘ Zircon

Formula: Zr(SiO4)

Localities: Reported from at least 15 localities in this region.

Description: Sauer (1982): "Some opaque crystals from the Rio das Mortes valley, state of Goiás, are mainly sought after by collectors, because of their exceptional dimensions, sometimes attaining several centimetres."

ⓘ Zircon var. Cyrtolite

Formula: Zr[(SiO4),(OH)4]

ⓘ Zirconolite

Formula: CaZrTi2O7

ⓘ Zoisite

Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)

Localities:

Crixás, Crixás gold field, Goiás, Brazil
Inglesa mine (Chapéu do Sol claim), Crixás, Crixás gold field, Goiás, Brazil
Pelotas mine, Monte Alegre de Goiás, Goiás, Brazil