Cora C Wohlgemuth-Ueberwasser | Helmholtz-Zentrum Potsdam (original) (raw)

Papers by Cora C Wohlgemuth-Ueberwasser

Research paper thumbnail of Fluorite Mineralization Related to Carbonatitic Magmatism in the Western Transbaikalia: Insights from Fluid Inclusions and Trace Element Composition

Minerals, Oct 26, 2021

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Research paper thumbnail of Behaviour of Ir in chromite-saturated silicate melt—Experiments and LA-ICP-MS analysis

Geochimica et Cosmochimica Acta, Aug 1, 2006

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Research paper thumbnail of Partitioning of Pb, Zn, Cd, Se, and Te during terrestrial core formation: No evidence for sulfide melts

Geochimica et Cosmochimica Acta, Aug 1, 2006

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Research paper thumbnail of Quadrupole LA-ICP-MS U/Pb geochronology of baddeleyite single crystals

Journal of Analytical Atomic Spectrometry, 2015

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Research paper thumbnail of Sulfide oxidation as a process for the formation of copper-rich magmatic sulfides

Mineralium Deposita, Apr 22, 2012

Abstract Typical magmatic sulfides are dominated by pyrrhotite and pentlandite with minor chalcop... more Abstract Typical magmatic sulfides are dominated by pyrrhotite and pentlandite with minor chalcopyrite, and the bulk atomic Cu/Fe ratio of these sulfides is typically less than unity. However, there are rare magmatic sulfide occurrences that are dominated by Cu-rich sulfides (eg, bornite, digenite, and chalcopyrite, sometimes coexisting with metallic Cu) with atomic Cu/Fe as high as 5. Typically, these types of sulfide assemblages occur in the upper parts of moderately to highly fractionated layered mafic–ultramafic intrusions, a well- ...

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Research paper thumbnail of The Earth’s missing lead may not be in the core

Nature, Nov 1, 2008

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Research paper thumbnail of Pyrite Zoning as a Record of Mineralization in the Ventersdorp Contact Reef, Witwatersrand Basin, South Africa

Economic geology and the bulletin of the Society of Economic Geologists, Aug 13, 2013

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Research paper thumbnail of Synthesis of PGE sulfide standards for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)

Contributions to Mineralogy and Petrology, Jun 16, 2007

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Research paper thumbnail of Formation of Pt, Pd and Ni tellurides: experiments in sulfide–telluride systems

Contributions to Mineralogy and Petrology, Dec 12, 2006

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Research paper thumbnail of Fractionation of the noble metals by physical processes

Contributions to Mineralogy and Petrology, Sep 15, 2006

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Research paper thumbnail of Partitioning of REE between calcite and carbonatitic melt containing P, S, Si at 900-650 °C and 100 MPa

Research Square (Research Square), Sep 16, 2021

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Research paper thumbnail of Reconstruction of tectonic events on the northern Eurasia margin of the Arctic, from U-Pb detrital zircon provenance investigations of late Paleozoic to Mesozoic sandstones in southern Taimyr Peninsula

Geological Society of America Bulletin, Jun 30, 2015

The Taimyr fold-and-thrust belt records late Paleozoic compression, presumably related to Uralian... more The Taimyr fold-and-thrust belt records late Paleozoic compression, presumably related to Uralian orogenesis, overprinted by Mesozoic dextral strike-slip faulting. U-Pb detrital zircon analyses of 38 sandstones from southern Taimyr were conducted using laser ablation–inductively coupled plasma–mass spectrometry to investigate late Paleozoic to Mesozoic sediment provenance and the tectonic evolution of Taimyr within a regional framework. The Pennsylvanian to Permian sandstones contain detrital zircon populations of 370–260 Ma, which are consistent with derivation from the late Paleozoic Uralian orogen in northern Taimyr and/or the polar Urals. Late Neoproterozoic through Silurian ages (688–420 Ma), most consistent with derivation from Timanian and Caledonian age sources, suggest an ultimate Baltica source. Southern Taimyr represents the proforeland basin of the bivergent Uralian orogen in the late Paleozoic. Triassic sedimentary rocks contain detrital zircon populations of Carboniferous–Permian (355–260 Ma), late Neoproterozoic to Early Devonian (650–410 Ma), and minor Neoproterozoic (1000–700 Ma) ages, which suggest a similar provenance as the Carboniferous to Permian strata. The addition of a Permian–Triassic (260–220 Ma) zircon population indicates derivation of detritus from Siberian Trap–related magmatism. Jurassic samples have a dominant age peak at 255 Ma and a distinct reduction in Carboniferous–Permian and late Neoproterozoic to Early Devonian input, suggesting that erosion and contributions from Uralian sources ceased while greater input from Siberian Trap–related rocks of Taimyr dominated. Comparison of these results to the published literature demonstrates that detritus from the Uralian orogen was deposited in Taimyr, Novaya Zemlya, and the New Siberian Islands in the Permian, but not in the Lisburne Hills or Wrangel Island. In the Triassic, Taimyr, Chukotka, Wrangel Island, the Kular Dome in the northern Verkhoyansk of Siberia, Lisburne Hills, Franz Josef Land, and Svalbard shared sources from Taimyr, the Siberian Traps, and the polar Urals, indicating that there were no geographic barriers among these locations prior to opening of the Amerasia Basin. Detritus from the Uralian orogen in Taimyr was shed northward into the retroforeland basin and was then transported farther 20–30 m.y. after Uralian orogenesis. The widespread distribution of material eroded from Taimyr and the polar Urals during the Triassic is likely due to the arrival of, and sublithospheric spreading associated with, the Siberian mantle plume head at ca. 250 Ma. The subsequent motion of the lithosphere relative to the plume-swell likely caused a northwestward migration of the uplifted regions. Taimyr and the polar Urals were probably affected. In the Jurassic, detrital zircon spectra from Taimyr, Chukotka, the Kular Dome, and Svalbard show great differences, suggesting that these locations no longer shared the same provenance from Taimyr and the Urals. The restricted distribution of detritus from Taimyr and the Urals indicates that erosion of the Uralian orogen was reduced. In the Late Jurassic, the depositional setting of southern Taimyr probably changed from a foreland to an intracratonic basin.

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Research paper thumbnail of Conditions for the crystallization of fluorite in the Mushgai-Khudag complex (Southern Mongolia): Evidence from trace element geochemistry and fluid inclusions

Chemie der Erde, Dec 1, 2020

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Research paper thumbnail of Distribution and solubility limits of trace elements in hydrothermal black smoker sulfides: An in-situ LA-ICP-MS study

Geochimica et Cosmochimica Acta, Jun 1, 2015

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Research paper thumbnail of LA-Q-ICP-MS apatite U/Pb geochronology using common Pb in plagioclase: Examples from layered mafic intrusions

American Mineralogist, Mar 1, 2017

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Research paper thumbnail of Author response for "Two‐stage magmatism and mineralization of Tulaergen nickel‐copper deposit in eastern Tianshan, North‐west China: Evidence from bulk rock geochemistry and in situ mineral chemistry

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Research paper thumbnail of Melt inclusions in olivines from phoscorites and olivinites of the Kovdor massif

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Research paper thumbnail of Distribution of trace elements in sulfides from Deyin hydrothermal field, Mid-Atlantic Ridge – Implications for its mineralizing processes

Ore Geology Reviews, 2021

Abstract Knowledge about the trace element distribution in sulfides is the key for understanding ... more Abstract Knowledge about the trace element distribution in sulfides is the key for understanding the trace metal inventory of ancient volcanic massive sulfide during the formation of these deposits on the seafloor. The distribution of trace metals in sulfides reflects changes in the physicochemical conditions and precipitation processes during precipitation. Hydrothermal black smoker samples or this study originate from the southern Mid-Atlantic (TVG02, TVG06) and can be classified into two types: (1) (Fe-Zn) sulfides consisting predominantly of pyrite and sphalerite, with minor chalcopyrite, isocubanite, and galena and (2) (Fe-Cu) sulfides, which contain mainly pyrite and chalcopyrite, with rare isocubanite and sphalerite. The sulfide samples were analyzed by electron microprobe for major elements, and by laser ablation inductively coupled plasma mass spectrometry and focused ion beam technique and transmission electron microscopy for in situ trace elements. The data reveal complex hydrothermal processes in high- and low- temperature fluids. Colloform and dendritic pyrite from (Fe-Zn) sulfides are enriched in Mn, Tl, As, V, Pb, and Zn and indicate precipitation from low temperature fluids (250-100°C) reflecting a rapid mixture of hydrothermal fluids with seawater. A continuous enrichment of incompatible elements at the interface of growing pyrite with fluid finally leads to the nucleation and precipitation of sphalerite and galena, and results in the enrichment of As, Hg, Pb, Au, Ag, and Cd in sphalerite micro-inclusions which are hosted in colloform pyrite at low temperature. Galena inclusions occur in the pores and the interstices of sphalerite grains and formed by the enrichment of Pb in the hydrothermal fluid at low-temperature ( 300°C) fluids.

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Research paper thumbnail of Metamorphic alteration of the massive sulfide horizon from the Salt River VMS deposit (South Africa)

Ore Geology Reviews, 2014

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Research paper thumbnail of Coupled Fe and S isotope variations in pyrite nodules from Archean shale

Earth and Planetary Science Letters, Apr 1, 2014

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Research paper thumbnail of Fluorite Mineralization Related to Carbonatitic Magmatism in the Western Transbaikalia: Insights from Fluid Inclusions and Trace Element Composition

Minerals, Oct 26, 2021

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Research paper thumbnail of Behaviour of Ir in chromite-saturated silicate melt—Experiments and LA-ICP-MS analysis

Geochimica et Cosmochimica Acta, Aug 1, 2006

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Research paper thumbnail of Partitioning of Pb, Zn, Cd, Se, and Te during terrestrial core formation: No evidence for sulfide melts

Geochimica et Cosmochimica Acta, Aug 1, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Quadrupole LA-ICP-MS U/Pb geochronology of baddeleyite single crystals

Journal of Analytical Atomic Spectrometry, 2015

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Research paper thumbnail of Sulfide oxidation as a process for the formation of copper-rich magmatic sulfides

Mineralium Deposita, Apr 22, 2012

Abstract Typical magmatic sulfides are dominated by pyrrhotite and pentlandite with minor chalcop... more Abstract Typical magmatic sulfides are dominated by pyrrhotite and pentlandite with minor chalcopyrite, and the bulk atomic Cu/Fe ratio of these sulfides is typically less than unity. However, there are rare magmatic sulfide occurrences that are dominated by Cu-rich sulfides (eg, bornite, digenite, and chalcopyrite, sometimes coexisting with metallic Cu) with atomic Cu/Fe as high as 5. Typically, these types of sulfide assemblages occur in the upper parts of moderately to highly fractionated layered mafic–ultramafic intrusions, a well- ...

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Research paper thumbnail of The Earth’s missing lead may not be in the core

Nature, Nov 1, 2008

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Research paper thumbnail of Pyrite Zoning as a Record of Mineralization in the Ventersdorp Contact Reef, Witwatersrand Basin, South Africa

Economic geology and the bulletin of the Society of Economic Geologists, Aug 13, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Synthesis of PGE sulfide standards for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)

Contributions to Mineralogy and Petrology, Jun 16, 2007

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Research paper thumbnail of Formation of Pt, Pd and Ni tellurides: experiments in sulfide–telluride systems

Contributions to Mineralogy and Petrology, Dec 12, 2006

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Research paper thumbnail of Fractionation of the noble metals by physical processes

Contributions to Mineralogy and Petrology, Sep 15, 2006

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Research paper thumbnail of Partitioning of REE between calcite and carbonatitic melt containing P, S, Si at 900-650 °C and 100 MPa

Research Square (Research Square), Sep 16, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Reconstruction of tectonic events on the northern Eurasia margin of the Arctic, from U-Pb detrital zircon provenance investigations of late Paleozoic to Mesozoic sandstones in southern Taimyr Peninsula

Geological Society of America Bulletin, Jun 30, 2015

The Taimyr fold-and-thrust belt records late Paleozoic compression, presumably related to Uralian... more The Taimyr fold-and-thrust belt records late Paleozoic compression, presumably related to Uralian orogenesis, overprinted by Mesozoic dextral strike-slip faulting. U-Pb detrital zircon analyses of 38 sandstones from southern Taimyr were conducted using laser ablation–inductively coupled plasma–mass spectrometry to investigate late Paleozoic to Mesozoic sediment provenance and the tectonic evolution of Taimyr within a regional framework. The Pennsylvanian to Permian sandstones contain detrital zircon populations of 370–260 Ma, which are consistent with derivation from the late Paleozoic Uralian orogen in northern Taimyr and/or the polar Urals. Late Neoproterozoic through Silurian ages (688–420 Ma), most consistent with derivation from Timanian and Caledonian age sources, suggest an ultimate Baltica source. Southern Taimyr represents the proforeland basin of the bivergent Uralian orogen in the late Paleozoic. Triassic sedimentary rocks contain detrital zircon populations of Carboniferous–Permian (355–260 Ma), late Neoproterozoic to Early Devonian (650–410 Ma), and minor Neoproterozoic (1000–700 Ma) ages, which suggest a similar provenance as the Carboniferous to Permian strata. The addition of a Permian–Triassic (260–220 Ma) zircon population indicates derivation of detritus from Siberian Trap–related magmatism. Jurassic samples have a dominant age peak at 255 Ma and a distinct reduction in Carboniferous–Permian and late Neoproterozoic to Early Devonian input, suggesting that erosion and contributions from Uralian sources ceased while greater input from Siberian Trap–related rocks of Taimyr dominated. Comparison of these results to the published literature demonstrates that detritus from the Uralian orogen was deposited in Taimyr, Novaya Zemlya, and the New Siberian Islands in the Permian, but not in the Lisburne Hills or Wrangel Island. In the Triassic, Taimyr, Chukotka, Wrangel Island, the Kular Dome in the northern Verkhoyansk of Siberia, Lisburne Hills, Franz Josef Land, and Svalbard shared sources from Taimyr, the Siberian Traps, and the polar Urals, indicating that there were no geographic barriers among these locations prior to opening of the Amerasia Basin. Detritus from the Uralian orogen in Taimyr was shed northward into the retroforeland basin and was then transported farther 20–30 m.y. after Uralian orogenesis. The widespread distribution of material eroded from Taimyr and the polar Urals during the Triassic is likely due to the arrival of, and sublithospheric spreading associated with, the Siberian mantle plume head at ca. 250 Ma. The subsequent motion of the lithosphere relative to the plume-swell likely caused a northwestward migration of the uplifted regions. Taimyr and the polar Urals were probably affected. In the Jurassic, detrital zircon spectra from Taimyr, Chukotka, the Kular Dome, and Svalbard show great differences, suggesting that these locations no longer shared the same provenance from Taimyr and the Urals. The restricted distribution of detritus from Taimyr and the Urals indicates that erosion of the Uralian orogen was reduced. In the Late Jurassic, the depositional setting of southern Taimyr probably changed from a foreland to an intracratonic basin.

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Research paper thumbnail of Conditions for the crystallization of fluorite in the Mushgai-Khudag complex (Southern Mongolia): Evidence from trace element geochemistry and fluid inclusions

Chemie der Erde, Dec 1, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Distribution and solubility limits of trace elements in hydrothermal black smoker sulfides: An in-situ LA-ICP-MS study

Geochimica et Cosmochimica Acta, Jun 1, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of LA-Q-ICP-MS apatite U/Pb geochronology using common Pb in plagioclase: Examples from layered mafic intrusions

American Mineralogist, Mar 1, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Author response for "Two‐stage magmatism and mineralization of Tulaergen nickel‐copper deposit in eastern Tianshan, North‐west China: Evidence from bulk rock geochemistry and in situ mineral chemistry

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Melt inclusions in olivines from phoscorites and olivinites of the Kovdor massif

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Distribution of trace elements in sulfides from Deyin hydrothermal field, Mid-Atlantic Ridge – Implications for its mineralizing processes

Ore Geology Reviews, 2021

Abstract Knowledge about the trace element distribution in sulfides is the key for understanding ... more Abstract Knowledge about the trace element distribution in sulfides is the key for understanding the trace metal inventory of ancient volcanic massive sulfide during the formation of these deposits on the seafloor. The distribution of trace metals in sulfides reflects changes in the physicochemical conditions and precipitation processes during precipitation. Hydrothermal black smoker samples or this study originate from the southern Mid-Atlantic (TVG02, TVG06) and can be classified into two types: (1) (Fe-Zn) sulfides consisting predominantly of pyrite and sphalerite, with minor chalcopyrite, isocubanite, and galena and (2) (Fe-Cu) sulfides, which contain mainly pyrite and chalcopyrite, with rare isocubanite and sphalerite. The sulfide samples were analyzed by electron microprobe for major elements, and by laser ablation inductively coupled plasma mass spectrometry and focused ion beam technique and transmission electron microscopy for in situ trace elements. The data reveal complex hydrothermal processes in high- and low- temperature fluids. Colloform and dendritic pyrite from (Fe-Zn) sulfides are enriched in Mn, Tl, As, V, Pb, and Zn and indicate precipitation from low temperature fluids (250-100°C) reflecting a rapid mixture of hydrothermal fluids with seawater. A continuous enrichment of incompatible elements at the interface of growing pyrite with fluid finally leads to the nucleation and precipitation of sphalerite and galena, and results in the enrichment of As, Hg, Pb, Au, Ag, and Cd in sphalerite micro-inclusions which are hosted in colloform pyrite at low temperature. Galena inclusions occur in the pores and the interstices of sphalerite grains and formed by the enrichment of Pb in the hydrothermal fluid at low-temperature ( 300°C) fluids.

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Research paper thumbnail of Metamorphic alteration of the massive sulfide horizon from the Salt River VMS deposit (South Africa)

Ore Geology Reviews, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Coupled Fe and S isotope variations in pyrite nodules from Archean shale

Earth and Planetary Science Letters, Apr 1, 2014

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