The case for metamorphic base metal mineralization: pyrite chemical, Cu and S isotope data from the Cu-Zn deposit at Kupferberg in Bavaria, Germany

Höhn, Stefan; Frimmel, Hartwig E.; Debaille, Vinciane; Pašava, Jan; Kuulmann, L.; Debouge, Wendy

doi:10.1007/s00126-017-0714-z

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…The Cu isotope ratios of the coarse‐grained, remobilized Ccp‐2 from the Broken Hill deposit shows a comparatively narrow standard deviation (σ = 0.21), which is in line with the textural interpretation of this generation being syn‐metamorphic (Höhn et al., 2017; Ikehata et al., 2011). Its mean value of δ 65 Cu (1.42‰) is, again, far outside the range defined for high‐temperature hydrothermal chalcopyrite but close to the ratio of 1.2‰, which is the typical mean value in the enrichment zone of supergene systems (Mathur & Fantle, 2015).…”

Section: Interpretation and Discussionsupporting

confidence: 77%

“…Measurements of the Cu isotopic composition were performed using a Nu Plasma HR‐MCICP‐MS, also at ULB, following the procedure described by Höhn et al. (2017). All isotope ratios are reported in standard per mil notation relative to the NIST 976 standard with 2σ ≤ 0.10.…”

Section: Sample Materials and Analytical Proceduresmentioning

confidence: 99%

“…Recently, the Cu isotope system has become a useful tool in ore deposit research, especially because of its high sensitivity to low‐temperature supergene processes (Mathur & Fantle, 2015; Mathur et al., 2014). High‐temperature hydrothermal processes as well as metamorphic overprint allegedly have only limited impact on the Cu isotopic characteristics of a deposit (Höhn et al., 2017; Ikehata et al., 2011). Consequently, Cu isotopes should provide a perfect tool to detect pre‐metamorphic oxidation in the metallogenesis of sulphidic deposits.…”

Section: Introductionmentioning

confidence: 99%

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Pre‐Klondikean oxidation prepared the ground for Broken Hill‐type mineralization in South Africa

et al. 2020

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New Cu isotope data obtained on chalcopyrite from the Black Mountain and the Broken Hill deposits in the medium‐ to high‐grade metamorphic Aggeneys‐Gamsberg ore district (South Africa) require a revision of our understanding of the genesis of metamorphic Broken Hill‐type massive sulphide deposits. Chalcopyrite from both deposits revealed unusually wide ranges in δ65Cu (−2.41 to 2.84‰ NIST 976 standard) in combination with distinctly positive mean values (0.27 and 0.94‰, respectively). This is interpreted to reflect derivation from various silicate and oxide precursor minerals in which Cu occurred in higher oxidation states. Together with the observation of a typical supergene base metal distribution within the deposits and their spatial association with an unconformity only meters above the ore horizon, our new data are best explained by supergene oxidation of originally possibly SEDEX deposits prior to metamorphic sulphide formation, between the Okiepian (1,210–1,180 Ma) and Klondikean (1,040–1,020 Ma) orogenic events.

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Section: Interpretation and Discussionsupporting

confidence: 77%

Section: Sample Materials and Analytical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pre‐Klondikean oxidation prepared the ground for Broken Hill‐type mineralization in South Africa

et al. 2020

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“…In-situ alteration of the copper sulfides by metamorphic fluid certainly occurred and could have impacted the copper isotope values in the native copper. How metamorphic fluids could alter the copper isotope composition in this tectonic environment are not well studied, however, Höhn et al (2017) demonstrated that the metamorphic processes associated with J o u r n a l P r e -p r o o f sulfide deposition generated a relatively tight range of copper isotope value from -0.3 to +0.4…”

Section: Cu Isotope Constraints On the Cu Provenancementioning

confidence: 99%

Native copper formation associated with serpentinization in the Cheshmeh-Bid ophiolite massif (Southern Iran)

Eslami

Malvoisin

Grieco

et al. 2021

Lithos

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Copper Isotopes Used in Mineral Exploration

Mathur

Zhao

2023

Mineral Resource Reviews

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The use of copper isotopes related to ore deposit location and genesis has greatly expanded over the past twenty years. The isotope values in ores, rocks, soils, and water range greater than 10‰ and provide ample isotopic variation to identify and interpret complex geological process. From an exploration standpoint, the copper isotope values in waters, sulfides and weathered rocks vector to mineralization at depth. Ground and surface waters display the greatest potential for both green and brownfields exploration, whereas Fe-oxides and other related ore minerals isotope compositions for exploration are nascent. From an ore genesis perspective, the copper isotopes serve as a redox proxy to aid in unraveling magmatic and hydrothermal processes related to metal sulfide precipitation. In summary, the use of copper isotopic approaches by the mining industry are ideal as they point to processes directly related to the metal of economic interest and should be employed in all stages of the mine life from exploration to extraction, and to environmental monitoring post-mining activities.

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The case for metamorphic base metal mineralization: pyrite chemical, Cu and S isotope data from the Cu-Zn deposit at Kupferberg in Bavaria, Germany

Cited by 11 publications

References 32 publications

Pre‐Klondikean oxidation prepared the ground for Broken Hill‐type mineralization in South Africa

Pre‐Klondikean oxidation prepared the ground for Broken Hill‐type mineralization in South Africa

Native copper formation associated with serpentinization in the Cheshmeh-Bid ophiolite massif (Southern Iran)

Copper Isotopes Used in Mineral Exploration

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