An investigation of the system Cu-S and some natural copper sulfides between 25 degrees and 700 degrees C

Roseboom, Eugene H.

doi:10.2113/gsecongeo.61.4.641

Cited by 176 publications

(75 citation statements)

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“…Stability fields of sulfide minerals present in the Kupferschiefer range between 72 and 557 C and up to 1120 C for digenite (high) ( Table 1). Sources of information were included in [29][30][31][32][33][34][35][36][37].…”

Section: High Temperature Suitementioning

confidence: 99%

Zechstein-Kupferschiefer Mineralization Reconsidered as a Product of Ultra-Deep Hydrothermal, Mud-Brine Volcanism

Keith¹,

Spieth²,

Rasmussen³

2018

Contributions to Mineralization

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The Kupferschiefer is a copper-, polymetallic-, hydrocarbon-bearing black shale of the lowermost Zechstein Group of Permo-Triassic age (252 Ma) in Germany and Poland. It is usually 1 m thick and underlies 600,000 km 2 , extending from Great Britain to Belarus for a distance of over 1500 km. At a district scale, copper has been mined for over 800 years since its discovery circa 1200 A.D. Mineralogical, chemical, and geological analyses of the combined Zechstein-Kupferschiefer show strong chemical and paragenetic relationships between the Zechstein salines, Kupferschiefer, and Weissliegend sandstones that lead to a broader, more unified, genetically linked model related to deep-sourced, hot, hydrothermal, mud-brine volcanism. The overall Zechstein-Kupferschiefer chemical stratigraphy suggests density-/composition-driven fractionation of deep-sourced, metal-rich, alkalirich, silica-aluminum-rich, halogen-rich, high-density brines. The ultimate brine source is interpreted to be serpentinized peridotite in the lower crust near the Moho transition to the mantle. Dehydration of the serpentinite source to talc (steatization) by mantle heat during failed, intra-continental rifting of the Pangaea supercontinent at the end of Permian time released vast amounts of element-laden, high-density brines into deep-basement fractures, depositing them into and above the Rotliegend Sandstone in the shallow Kupferschiefer Sea, which is analogous to the modern northern Caspian Sea.

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Section: High Temperature Suitementioning

confidence: 99%

Zechstein-Kupferschiefer Mineralization Reconsidered as a Product of Ultra-Deep Hydrothermal, Mud-Brine Volcanism

Keith¹,

Spieth²,

Rasmussen³

2018

Contributions to Mineralization

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“…Cross-cutting features like in El Jardin are a typical component in red-bed deposits. Temperatures on base of vitrinite reflectivity (Teichmiiller and Teichmiiller 1967) and Cu-Fe-S phase relationships (Roseboom 1966) (Lortie and Clark 1987). Sulfur isotope analyses of a few more or less coexisting sulfide and sulfate samples support low temperatures and are in "permissive agreement with a bacterial reduction system" (Lortie and Clark 1987).…”

Section: Conditions Of Ore Formationmentioning

confidence: 97%

The Stratiform Ag-Cu Deposit El Jardín, Northern Chile

Mayer

Fontboté

1990

Stratabound Ore Deposits in the Andes

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“…Baas-Becking and Moore [227] reported that chalcocite cannot be formed abiotically at room temperature and that microbiological formation of chalcocite is a product of digenite, the first species formed during SRBinduced corrosion of copper alloys. Djurleite is important in SRB-induced corrosion of copper alloys because it forms a protective sulfide film [229] and is difficult to synthesize abiotically at room temperature [230].…”

Section: E3 Microbial Corrosionmentioning

confidence: 99%

Copper and Copper Alloys

Sequeira

2011

Uhlig's Corrosion Handbook

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An investigation of the system Cu-S and some natural copper sulfides between 25 degrees and 700 degrees C

Cited by 176 publications

References 0 publications

Zechstein-Kupferschiefer Mineralization Reconsidered as a Product of Ultra-Deep Hydrothermal, Mud-Brine Volcanism

Zechstein-Kupferschiefer Mineralization Reconsidered as a Product of Ultra-Deep Hydrothermal, Mud-Brine Volcanism

The Stratiform Ag-Cu Deposit El Jardín, Northern Chile

Copper and Copper Alloys

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