Cu isotope systematics of conduit-type Cu–PGE mineralization in the Eastern Gabbro, Coldwell Complex, Canada

Brzozowski, Matthew J.; Good, David; Wu, Chunping; Li, Weiqiang

doi:10.1007/s00126-020-00992-8

Cited by 20 publications

(16 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Duan, J., Li, C., Qian, Z., Jiao, J., Ripley, E. M., and Feng, Y.. (2016). Multiple S isotopes, zircon Hf Rift System (Ripley et al 2015), Noril'sk Province (Malitch et al 2014), Eastern Gabbro (Brzozowski et al 2020), Tulaergen (Zhao et al 2017(Zhao et al , 2019, Kalatongke (Tang et al 2020), Baishiquan (Tang et al 2020) and Jinchuan (this study). The estimated initial sulfide melts and parental magma for the Jinchuan deposit are also indicated.…”

Section: Discussionmentioning

confidence: 83%

“…Numerical calculations indicate that variable R factors may be responsible for large Cu isotope fractionation in the Kalatongke, Baishiquan and Eastern Gabbro magmatic Ni-Cu deposits (e.g., Tang et al 2020;Brzozowski et al 2020). However, the formation of the Jinchuan deposit has experienced both sulfide segregation with variable R factors and subsequent sulfide-liquid fractionation (Fig.…”

Section: Diffusionmentioning

confidence: 99%

“…These observations suggest that Cu isotopes have potential as a tracer for Cu enrichment in the mantle sources of magmatic Ni-Cu deposits. To date, large δ 65 Cu variations (~4‰) in worldwide magmatic Ni-Cu deposits have been observed, including Noril'sk Province, Russia (Malitch et al 2014), Midcontinent Rift System, America (Ripley et al 2015), Eastern Gabbro, Canada (Brzozowski et al 2020), Tulaergen (Zhao et al 2017(Zhao et al , 2019, Kalatongke and Baishiquan (Tang et al 2020), China. However, the mechanism that caused these large Cu isotopic variations has not yet been well constrained.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Copper isotope evidence for a Cu-rich mantle source of the world-class Jinchuan magmatic Ni-Cu deposit

Zhao

Liu

Xue

et al. 2022

American Mineralogist

View full text Add to dashboard Cite

A Cu-rich mantle source may play a key role in generating giant magmatic Ni-Cu deposits worldwide, but evidence for source's Cu enrichment and its mechanism is still rare. Copper isotopes can provide novel and direct insights into this issue since metasomatism that causes Cu enrichment in the mantle is commonly associated with a huge Cu isotope fractionation. Here we present the first Cu isotopic study on the world-class Jinchuan magmatic Ni-Cu deposit in China, including disseminated, net-textured and massive sulfides. The disseminated and net-textured sulfides have variable δ 65 Cu values (+0.36 ± 0.38‰, n=42), which are higher than those of massive sulfides (−0.44 ± 0.28‰, n=11). The country rocks have a narrow This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

show abstract

Section: Discussionmentioning

confidence: 83%

Section: Diffusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Copper isotope evidence for a Cu-rich mantle source of the world-class Jinchuan magmatic Ni-Cu deposit

Zhao

Liu

Xue

et al. 2022

American Mineralogist

View full text Add to dashboard Cite

show abstract

“…5 A, ESM 2 Table S3 ) suggests that the granitic country rocks do not contain a significant mass independent fractionation (MIF) signal. Lastly, it is also possible that S was sourced from Archean rocks at depth, which has been suggested for other Ni–Cu–PGE-mineralized intrusions in the Midcontinent Rift System, including the Marathon deposit (Shahabi Far et al 2018 ; Brzozowski et al 2020 , 2021 ) and Duluth Complex (Ripley et al 2007 ).…”

Section: Discussionmentioning

confidence: 98%

“…It has been well documented that contamination signatures recorded by S isotopes and S/Se values can be diluted by interaction of the contaminated sulfide liquid with uncontaminated pulses of silicate melt (Lesher and Burnham 2001 ; Ripley and Li 2003 ; Hiebert et al 2013 , 2016 ; Queffurus and Barnes 2015 ; Smith et al 2016 , 2021 ; Shahabi Far et al 2018 ; Brzozowski et al 2020 , 2021 ), with complete destruction of the geochemical–isotopic signatures at R factors > 1,000 (ESM 1 Fig. S4 ).…”

Section: Discussionmentioning

confidence: 99%

Characterizing the supra- and subsolidus processes that generated the Current PGE–Cu–Ni deposit, Thunder Bay North Intrusive Complex, Canada: insights from trace elements and multiple S isotopes of sulfides

Brzozowski

Heggie²,

MacTavish³

et al. 2023

Miner Deposita

Self Cite

View full text Add to dashboard Cite

The Current deposit is hosted by serpentinized peridotite that intruded rocks of the Quetico Subprovince in the Midcontinent Rift, and is subdivided into three morphologically distinct regions — the shallow and thin Current–Bridge Zone in the northwest, the deep and thick 437–Southeast Anomaly (SEA) Zone in the southeast, and the thick Beaver–Cloud Zone in the middle. The magma parental to the Current deposit became saturated in sulfide as a result of the addition of external S from at least two sources — a deep source characterized by high Δ33S (< 3‰) values, and a shallow source, potentially the Archean metasedimentary country rocks, characterized by low Δ33S (< 0.3‰). Variations in Δ33S–S/Se–Cu/Pd values indicate that the contamination signatures were largely destroyed by interaction of the sulfide liquid with large volumes of uncontaminated silicate melt. The intrusion crystallized sequentially, with the Current–Bridge Zone crystallizing first, followed by the Beaver–Cloud Zone, and lastly by the 437–SEA Zone. This, along with the elevated Cu/Pd ratios in the 437–SEA Zone, which formed as a result of sulfide segregation during an earlier saturation event, and development of igneous layering in this zone, suggests that it represents the feeder channel to the Current deposit. After the intrusion crystallized, the base-metal sulfide mineralogy was modified by circulation of late-stage hydrothermal fluids, with pyrrhotite and pentlandite being replaced by pyrite and millerite, respectively. This fluid activity mobilized metals and semi-metals, including Fe, Ni, S, Se, Co, Cu, Ag, and As, but did not affect the PGE. This contribution highlights the importance of the interplay between magma dynamics and magmatic–hydrothermal processes in the formation of Ni–Cu–PGE-mineralized deposits.

show abstract

Copper Isotopes Used in Mineral Exploration

Mathur

Zhao

2023

Mineral Resource Reviews

View full text Add to dashboard Cite

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.

show abstract

Cu isotope systematics of conduit-type Cu–PGE mineralization in the Eastern Gabbro, Coldwell Complex, Canada

Cited by 20 publications

References 64 publications

Copper isotope evidence for a Cu-rich mantle source of the world-class Jinchuan magmatic Ni-Cu deposit

Copper isotope evidence for a Cu-rich mantle source of the world-class Jinchuan magmatic Ni-Cu deposit

Characterizing the supra- and subsolidus processes that generated the Current PGE–Cu–Ni deposit, Thunder Bay North Intrusive Complex, Canada: insights from trace elements and multiple S isotopes of sulfides

Copper Isotopes Used in Mineral Exploration

Contact Info

Product

Resources

About