Reimar Seltmann - Academia.edu (original) (raw)

Papers by Reimar Seltmann

Research paper thumbnail of Sedimentary Basins of Kazakhstan and Occurrence of Copper and Uranium: A Geological Overview and Tectonic Analysis

Several sedimentary basins (out of 15 basins) in Kazakhstan are characterized by the association... more Several sedimentary basins (out of 15 basins) in Kazakhstan are characterized by the association of sandstone-type uranium and sedimentary-hosted copper mineralization with oil, gas or coal fields. In central Kazakhstan, the Chu-Sarysu basin (along with Syr-Darya basin), both hosting a multicolored clay–gravel–sandstone sequence, are famous for roll-front type uranium deposits. The Chu-Sarysu basin is also the host of the world-class historical giant deposit of Dzhezkazgan (22 million metric tons) sandstone-hosted copper (by-product of rhenium) as well as smaller deposits of Zhaman-Aibat and the Zhilandy group. The Teniz depression, located in the northern Chu-Sarysu basin, is also prospective for the occurrence of sedimentary copper. Both basins share lithological and structural peculiarities significant to mineralization. The Teniz and Chu-Sarysu basins originated during the development of the Altaid Orogen (Wilhelm, et al., 2012). The Chu-Sarysu and Teniz basins are characterize...

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Research paper thumbnail of Conference Reports

Episodes, Dec 1, 2006

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Research paper thumbnail of Contribution of carbonaceous strata to intrusion–related Au mineralization: Evidence from trace elements and S–Pb isotopes in pyrite from the Qukulekedong Au–Sb deposit, East Kunlun, NW China

Gondwana Research

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Research paper thumbnail of A machine learning method for distinguishing detrital zircon provenance

Contributions to Mineralogy and Petrology

Zircon geochemistry provides a sensitive monitor of its parental magma composition. However, due ... more Zircon geochemistry provides a sensitive monitor of its parental magma composition. However, due to the complexity of the uptake of trace elements during zircon growth, identifying source magmas remains challenging, particularly for detrital grains whose petrological context is lost. We use a machine learning-based approach to explore the classifiers for zircon provenance, based on 3794 published, high-quality zircon trace element analyses compiled from I-, S-, and A-type granites. Three supervised machine learning algorithms, namely, Support Vector Machine (SVM), Random Forest (RF), and Multilayer Perceptron (MLP) were used and trained with 11 features, including 7 trace elements (Ce, Eu, Ho, Nb, Ta, Th, and U) and 4 derived trace element ratios (Th/U, U/Yb, Ce/Ce*, and Eu/Eu*). Our results show that all three trained machine learning methods perform very well with accuracy varying from 0.86 to 0.89, and that input–output relationships captured by different ML methods are nearly co...

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Research paper thumbnail of Contrasting styles of peraluminous S-type and I-type granitic magmatism: Identification and implications for the accretionary history of the Chinese South Tianshan

American Journal of Science

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Research paper thumbnail of Distinguish detrital zircon provenances based on a machine learning technology

Goldschmidt2022 abstracts

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Research paper thumbnail of Unraveling evolution histories of large hydrothermal systems via garnet U-Pb dating, sulfide trace element and isotopic analyses: A case study of Shuikoushan polymetallic ore field, South China

Ore Geology Reviews

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Research paper thumbnail of Quantitative characterization of orogens through isotopic mapping

Orogens are major sites for crustal growth on Earth. However, characterizing orogens with stages ... more Orogens are major sites for crustal growth on Earth. However, characterizing orogens with stages is challenging. Here we present Nd isotope mapping results of felsic and intermediate igneous rocks from eight well-studied, typical Phanerozoic orogens. The data illustrate the distribution and areas of isotopic domains ranging from highly primitive to highly evolved, which reflects their final preservation from long-term crustal growth. From the data, we calculated the areal proportion of juvenile crust and divided the orogens into (i) highly primitive (with >70% juvenile crust); (ii) primitive (70-50%; e.g., Altaids with ~58%); (iii) slightly primitive (50–30%; e.g., North American Cordillera (~48%), Newfoundland Northern Appalachian Orogen (~40%), Lachlan Orogen (~31%)); (iv) evolved (30–10%); (v) highly evolved (10–0%; e.g., Tethyan Tibet (~4%), Caledonides (~2%), Variscides (~1%), and Qinling-Dabie (<1%)). Those from (i) to (iii) quantitatively characterize and/or correspond ...

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Research paper thumbnail of Neoproterozoic tectonic shift from collisional orogenesis to intraplate extension in the Yili Block, southern Central Asian Orogenic Belt

Precambrian Research

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Research paper thumbnail of Magmatism and Metallogeny of the Altai and Adjacent Large Igneous Provinces

Schweizerbart'sche Verlagsbuchhandlung, 2007

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Research paper thumbnail of Metallogeny of Collisional Orogens - Editorial

Metallogeny of Collisional Orogens, 1994

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Research paper thumbnail of Geology and Genesis of the Unkurtash Intrusion-Related Gold Deposit, Tien Shan, Kyrgyzstan

Economic Geology, 2022

Situated in the heart of the Tien Shan gold province, Unkurtash (3.5 Moz at 1.82 g/t) is a repres... more Situated in the heart of the Tien Shan gold province, Unkurtash (3.5 Moz at 1.82 g/t) is a representative lode gold deposit that is hosted within the Carboniferous Andagul granodiorite in the Kassan district, western Kyrgyzstan. The Tien Shan gold province consists of porphyry and epithermal deposits, which are related to magmatic arcs, and lode gold deposits formed in the late stages of continent-continent collision that have been generally classified as mesothermal or orogenic type. Some of the lode gold deposits have been considered to be intrusion-related, but the genetic relationship between gold mineralization and the magmatic intrusions remains ambiguous in most cases due to lack of absolute timing of the gold mineralization. This paper addresses this problem through detailed geologic and petrographic studies of the Unkurtash gold deposit in conjunction with Re-Os, U-Pb, and 40Ar/39Ar dating along with S and Pb isotopes. The paragenesis of the Unkurtash deposit is divided int...

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Research paper thumbnail of Der Übergangsbereich Pegmatit-/Aplit-in Hydrothermal-Systeme am Beispiel Ehrenfriedersdorf/Erzgebirge

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Research paper thumbnail of Spatial and temporal variations of geochemical and isotopic compositions of Paleozoic magmatic rocks in the Western Tianshan, NW China: A magmatic response of the Advancing and Retreating Subduction

Journal of Asian Earth Sciences, 2022

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Research paper thumbnail of Metallogeny of collisional orogens : focussed on the Erzgebirge and comparable metallogenic settings : proceedings of the IAGOD erzgebirge meeting, Geyer, June 4-6, 1993

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Research paper thumbnail of Data from a pilot plant experiment for the processing of a complex tin skarn ore - 19.11.2018

This data set derives from a pilot plant campaign for the beneficiation of a complex tin bearing ... more This data set derives from a pilot plant campaign for the beneficiation of a complex tin bearing skarn ore, including different separation and classification steps. The aim of the pilot plant test work was to prove a flowsheet that had been developed based on detailed geometallurgical analysis and results from the research projects AFK (Aufbereitung feinkörniger Komplexerze, BMBF grant number 033R128) and FAME (European Union grant 641650) to produce a cassiterite concentrate for tin production, and further preconcentrates for iron, zinc, copper, indium, and arsenic. The tin mineralization is partially well localized in cassiterite, but also partially finely disseminated and thus unrecoverable as minor components in other minerals. The iron is located in magnetic and nonmagnetic iron oxides sometimes intergrown with cassiterite. Therefore, iron concentrates are recovered at larger grain sizes but need a further tin recovery step not implemented in the reported experiment. The other elements are mainly deported in sulfides, which are bulk recovered in a flotation step. A subsequent selective flotation is needed to recover them individually. This selective flotation is, however, not part of the reported experiment. The two tin concentrates recovered from the shaking table should be considered as preconcentrates, that can be enriched further e.g. through multi-stage gravity separation. The motivation for this data set is to provide a consistent basis for the application of new particle based geometallurgical methods enabled by automated mineralogy (e.g. Buchmann et al. 2018; Schach et al. 2019; Buchmann et al. 2020; Pereira et al. 2020). In addition, it should also allow for the comparison and evaluation of different analytical methods, which were used during the pilot plant experiments to generate a validated data set for the whole plant and to correlate different result from various methods. This is the basis for further investigations enabling the application of various analyzing methods in a synergetic way. Thos [...]

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Research paper thumbnail of The Gonçalo deposit: a good example of a future sustainable lithium mine

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Research paper thumbnail of Late-Variscan crustal evolution in the Altenberg-Teplice caldera; Evidence from new geochemical and geochronological data

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Research paper thumbnail of The influence of fractionation of REE-enriched minerals on the zircon partition coefficients

Geoscience Frontiers, 2021

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Research paper thumbnail of Unraveling the link between mantle upwelling and formation of Sn-bearing granitic rocks in the world-class Dachang tin district, South China

GSA Bulletin, 2021

Increasing evidence shows that the mantle contributes (directly or indirectly) to Sn-bearing gran... more Increasing evidence shows that the mantle contributes (directly or indirectly) to Sn-bearing granites worldwide. However, the specific role of mantle in the formation of tin granites and related mineralization remains poorly understood. In the world-class Dachang district, South China, tin mineralization is related to the Longxianggai equigranular/porphyritic biotite granites and tin orebodies are cut by granite porphyry dykes hosting mafic microgranular enclaves (MMEs). A combination of zircon U-Pb dating and Hf-O isotopes, mineral chemistry, and whole-rock elemental and Sr-Nd isotopic compositions—for granitic rocks and MMEs, is employed to constrain the petrogenesis and to unravel the link between tin fertility and mantle upwelling. Laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) zircon U-Pb dating indicates that the biotite granites were emplaced at ca. 93 Ma, and the granite porphyry dykes and MMEs were formed at ca. 86 Ma. The biotite granites are silic...

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Research paper thumbnail of Sedimentary Basins of Kazakhstan and Occurrence of Copper and Uranium: A Geological Overview and Tectonic Analysis

Several sedimentary basins (out of 15 basins) in Kazakhstan are characterized by the association... more Several sedimentary basins (out of 15 basins) in Kazakhstan are characterized by the association of sandstone-type uranium and sedimentary-hosted copper mineralization with oil, gas or coal fields. In central Kazakhstan, the Chu-Sarysu basin (along with Syr-Darya basin), both hosting a multicolored clay–gravel–sandstone sequence, are famous for roll-front type uranium deposits. The Chu-Sarysu basin is also the host of the world-class historical giant deposit of Dzhezkazgan (22 million metric tons) sandstone-hosted copper (by-product of rhenium) as well as smaller deposits of Zhaman-Aibat and the Zhilandy group. The Teniz depression, located in the northern Chu-Sarysu basin, is also prospective for the occurrence of sedimentary copper. Both basins share lithological and structural peculiarities significant to mineralization. The Teniz and Chu-Sarysu basins originated during the development of the Altaid Orogen (Wilhelm, et al., 2012). The Chu-Sarysu and Teniz basins are characterize...

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Research paper thumbnail of Conference Reports

Episodes, Dec 1, 2006

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Research paper thumbnail of Contribution of carbonaceous strata to intrusion–related Au mineralization: Evidence from trace elements and S–Pb isotopes in pyrite from the Qukulekedong Au–Sb deposit, East Kunlun, NW China

Gondwana Research

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A machine learning method for distinguishing detrital zircon provenance

Contributions to Mineralogy and Petrology

Zircon geochemistry provides a sensitive monitor of its parental magma composition. However, due ... more Zircon geochemistry provides a sensitive monitor of its parental magma composition. However, due to the complexity of the uptake of trace elements during zircon growth, identifying source magmas remains challenging, particularly for detrital grains whose petrological context is lost. We use a machine learning-based approach to explore the classifiers for zircon provenance, based on 3794 published, high-quality zircon trace element analyses compiled from I-, S-, and A-type granites. Three supervised machine learning algorithms, namely, Support Vector Machine (SVM), Random Forest (RF), and Multilayer Perceptron (MLP) were used and trained with 11 features, including 7 trace elements (Ce, Eu, Ho, Nb, Ta, Th, and U) and 4 derived trace element ratios (Th/U, U/Yb, Ce/Ce*, and Eu/Eu*). Our results show that all three trained machine learning methods perform very well with accuracy varying from 0.86 to 0.89, and that input–output relationships captured by different ML methods are nearly co...

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Research paper thumbnail of Contrasting styles of peraluminous S-type and I-type granitic magmatism: Identification and implications for the accretionary history of the Chinese South Tianshan

American Journal of Science

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Distinguish detrital zircon provenances based on a machine learning technology

Goldschmidt2022 abstracts

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Unraveling evolution histories of large hydrothermal systems via garnet U-Pb dating, sulfide trace element and isotopic analyses: A case study of Shuikoushan polymetallic ore field, South China

Ore Geology Reviews

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Quantitative characterization of orogens through isotopic mapping

Orogens are major sites for crustal growth on Earth. However, characterizing orogens with stages ... more Orogens are major sites for crustal growth on Earth. However, characterizing orogens with stages is challenging. Here we present Nd isotope mapping results of felsic and intermediate igneous rocks from eight well-studied, typical Phanerozoic orogens. The data illustrate the distribution and areas of isotopic domains ranging from highly primitive to highly evolved, which reflects their final preservation from long-term crustal growth. From the data, we calculated the areal proportion of juvenile crust and divided the orogens into (i) highly primitive (with >70% juvenile crust); (ii) primitive (70-50%; e.g., Altaids with ~58%); (iii) slightly primitive (50–30%; e.g., North American Cordillera (~48%), Newfoundland Northern Appalachian Orogen (~40%), Lachlan Orogen (~31%)); (iv) evolved (30–10%); (v) highly evolved (10–0%; e.g., Tethyan Tibet (~4%), Caledonides (~2%), Variscides (~1%), and Qinling-Dabie (<1%)). Those from (i) to (iii) quantitatively characterize and/or correspond ...

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Research paper thumbnail of Neoproterozoic tectonic shift from collisional orogenesis to intraplate extension in the Yili Block, southern Central Asian Orogenic Belt

Precambrian Research

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Magmatism and Metallogeny of the Altai and Adjacent Large Igneous Provinces

Schweizerbart'sche Verlagsbuchhandlung, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Metallogeny of Collisional Orogens - Editorial

Metallogeny of Collisional Orogens, 1994

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Research paper thumbnail of Geology and Genesis of the Unkurtash Intrusion-Related Gold Deposit, Tien Shan, Kyrgyzstan

Economic Geology, 2022

Situated in the heart of the Tien Shan gold province, Unkurtash (3.5 Moz at 1.82 g/t) is a repres... more Situated in the heart of the Tien Shan gold province, Unkurtash (3.5 Moz at 1.82 g/t) is a representative lode gold deposit that is hosted within the Carboniferous Andagul granodiorite in the Kassan district, western Kyrgyzstan. The Tien Shan gold province consists of porphyry and epithermal deposits, which are related to magmatic arcs, and lode gold deposits formed in the late stages of continent-continent collision that have been generally classified as mesothermal or orogenic type. Some of the lode gold deposits have been considered to be intrusion-related, but the genetic relationship between gold mineralization and the magmatic intrusions remains ambiguous in most cases due to lack of absolute timing of the gold mineralization. This paper addresses this problem through detailed geologic and petrographic studies of the Unkurtash gold deposit in conjunction with Re-Os, U-Pb, and 40Ar/39Ar dating along with S and Pb isotopes. The paragenesis of the Unkurtash deposit is divided int...

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Research paper thumbnail of Der Übergangsbereich Pegmatit-/Aplit-in Hydrothermal-Systeme am Beispiel Ehrenfriedersdorf/Erzgebirge

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Spatial and temporal variations of geochemical and isotopic compositions of Paleozoic magmatic rocks in the Western Tianshan, NW China: A magmatic response of the Advancing and Retreating Subduction

Journal of Asian Earth Sciences, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Metallogeny of collisional orogens : focussed on the Erzgebirge and comparable metallogenic settings : proceedings of the IAGOD erzgebirge meeting, Geyer, June 4-6, 1993

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Data from a pilot plant experiment for the processing of a complex tin skarn ore - 19.11.2018

This data set derives from a pilot plant campaign for the beneficiation of a complex tin bearing ... more This data set derives from a pilot plant campaign for the beneficiation of a complex tin bearing skarn ore, including different separation and classification steps. The aim of the pilot plant test work was to prove a flowsheet that had been developed based on detailed geometallurgical analysis and results from the research projects AFK (Aufbereitung feinkörniger Komplexerze, BMBF grant number 033R128) and FAME (European Union grant 641650) to produce a cassiterite concentrate for tin production, and further preconcentrates for iron, zinc, copper, indium, and arsenic. The tin mineralization is partially well localized in cassiterite, but also partially finely disseminated and thus unrecoverable as minor components in other minerals. The iron is located in magnetic and nonmagnetic iron oxides sometimes intergrown with cassiterite. Therefore, iron concentrates are recovered at larger grain sizes but need a further tin recovery step not implemented in the reported experiment. The other elements are mainly deported in sulfides, which are bulk recovered in a flotation step. A subsequent selective flotation is needed to recover them individually. This selective flotation is, however, not part of the reported experiment. The two tin concentrates recovered from the shaking table should be considered as preconcentrates, that can be enriched further e.g. through multi-stage gravity separation. The motivation for this data set is to provide a consistent basis for the application of new particle based geometallurgical methods enabled by automated mineralogy (e.g. Buchmann et al. 2018; Schach et al. 2019; Buchmann et al. 2020; Pereira et al. 2020). In addition, it should also allow for the comparison and evaluation of different analytical methods, which were used during the pilot plant experiments to generate a validated data set for the whole plant and to correlate different result from various methods. This is the basis for further investigations enabling the application of various analyzing methods in a synergetic way. Thos [...]

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Research paper thumbnail of The Gonçalo deposit: a good example of a future sustainable lithium mine

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Late-Variscan crustal evolution in the Altenberg-Teplice caldera; Evidence from new geochemical and geochronological data

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The influence of fractionation of REE-enriched minerals on the zircon partition coefficients

Geoscience Frontiers, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Unraveling the link between mantle upwelling and formation of Sn-bearing granitic rocks in the world-class Dachang tin district, South China

GSA Bulletin, 2021

Increasing evidence shows that the mantle contributes (directly or indirectly) to Sn-bearing gran... more Increasing evidence shows that the mantle contributes (directly or indirectly) to Sn-bearing granites worldwide. However, the specific role of mantle in the formation of tin granites and related mineralization remains poorly understood. In the world-class Dachang district, South China, tin mineralization is related to the Longxianggai equigranular/porphyritic biotite granites and tin orebodies are cut by granite porphyry dykes hosting mafic microgranular enclaves (MMEs). A combination of zircon U-Pb dating and Hf-O isotopes, mineral chemistry, and whole-rock elemental and Sr-Nd isotopic compositions—for granitic rocks and MMEs, is employed to constrain the petrogenesis and to unravel the link between tin fertility and mantle upwelling. Laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) zircon U-Pb dating indicates that the biotite granites were emplaced at ca. 93 Ma, and the granite porphyry dykes and MMEs were formed at ca. 86 Ma. The biotite granites are silic...

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