Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana (original) (raw)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana i

Regional Level Types
Merume River	River
Rest of Region 8	Municipality
Potaro-Siparuni Region	Region
Guyana	Country

Latitude & Longitude (WGS84):

5° 16' 0'' North , 59° 49' 59'' West

Latitude & Longitude (decimal):

Long-form identifier:

mindat:1:2:1969:2

e5cac0fe-cf38-40ee-a27a-238f995df98b

The Merume River is a river of Guyana, a tributary of the Kamarang River.

Merume is also the name of a nearby mountain, which is 30 miles (ca. 48 km) east of Mount Roraima. Director Creek is a tributary of Merume River. First Falls is a feature of the river which also limits travel by boat.

Kamakusa was a settlement along the river, and formerly a government center.

Original locality for Merumite.

Merumite was originally listed in American Mineralogist: 34(3-4): 339 as a new mineral name (see http://www.minsocam.org/ammin/AM34/AM34_339.pdf)

In 1967 Milton et al. showed it to consist of fine-grained intergrowths predominantly of eskolaite (Cr2O3), quartz, and occasionally with 4 new minerals (bracewellite, grimaldiite, guyanaite and mcconnellite, see https://pubs.usgs.gov/publication/pp887)

Note: Most tested specimens of merumite are virtually all eskolaite (Tony Nikischer, 2012, personal communication).

Merumite occurs as black rounded grains in alluvial gravels of the drainage basin of the Merume River, Guyana.

Select Mineral List Type

Standard Detailed Gallery Strunz

Chemical Elements

Mineral List

11 valid minerals. 4 (TL) - type locality of valid minerals.

Detailed Mineral List:

ⓘ Bracewellite (TL)Formula: CrO(OH)Type Locality: Description: River gravels.References: Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151. Livingston, A., Jackson, B., Davidson, P.J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48, 560-562.
ⓘ EskolaiteFormula: Cr2O3References: Livingston, A., Jackson, B., Davidson, P.J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48, 560-562.
ⓘ GahniteFormula: ZnAl2O4References: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ GoldFormula: AuReferences: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ Grimaldiite (TL)Formula: CrO(OH)Type Locality: Description: River gravels.References: Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151. Livingston, A., Jackson, B., Davidson, P.J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48, 560-562.
ⓘ Guyanaite (TL)Formula: CrO(OH)Type Locality: Description: River gravels.References: Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151. Livingston, A., Jackson, B., Davidson, P.J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48, 560-562.
ⓘ 'Jasper'References: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ Mcconnellite (TL)Formula: CuCrO2Type Locality: Description: River gravels.References: Geological Society of America, Progr. Ann. Meeting (1967) p. 151. Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose, Jr., H.J. (1976) Merumite – a complex assemblage of chromium minerals from Guyana. U.S. Geological Survey Professional Paper 887: 1–29. Livingston, A., Jackson, B., Davidson, P.J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48, 560-562.
ⓘ 'Merumite'References: Am. Mineral., 34, 339 (1949) Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ PyrophylliteFormula: Al2Si4O10(OH)2References: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ QuartzFormula: SiO2References: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ SilverFormula: AgReferences: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.
ⓘ TopazFormula: Al2(SiO4)(F,OH)2References: Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.

Gallery:

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Merume_River
Wikidata ID:	Q6820781

Other Regions, Features and Areas containing this locality

**Amazonian Craton**Craton
**Maroni-Itacaiunas Belt**Shield

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References

Milton, C., Appleman, D.E., Appleman, M.H., Chao, E.C.T., Cuttitta, F., Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose Jr., H.J. (1976) Merumite - A Complex Assemblage of Chromium Minerals from Guyana. United States Department of the Interior, Geological Survey Professional Paper 887.