Cadmium isotope fractionation in the Fule Mississippi Valley-type deposit, Southwest China

Zhu, Chen; Wen, Hao; Zhang, Yuxu; Fu, Shaohong; Fan, Haifeng; Cloquet, Christophe

doi:10.1007/s00126-016-0691-7

Cited by 64 publications

(25 citation statements)

References 36 publications

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“…This makes Cd isotopes useful for the study of the evolution of the solar system (Wombacher et al , ). Cadmium isotopes have also been used to investigate ore deposit formation processes (e.g., Zhu et al , Wen et al , Zhu et al ) and marine cycling of Cd (e.g., Lacan et al , Ripperger et al , Abouchami et al , Conway and John ). In recent decades, Cd mass fractions in world‐wide soils have dramatically increased due to contamination from mining, smelting, electroplating, wastewater irrigation, and use of chemical fertilisers and pesticides (e.g., Ghosh and Singh , Zhang et al , Wei et al ).…”

Section: Methodsmentioning

confidence: 99%

High‐Precision Cd Isotope Measurements of Soil and Rock Reference Materials by MC‐ICP‐MS with Double Spike Correction

Liu

Zhang

et al. 2019

Geostandard Geoanalytic Res

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This study presents a high‐precision Cd isotope measurement method for soil and rock reference materials using MC‐ICP‐MS with double spike correction. The effects of molecular interferences (e.g., 109Ag1H+, 94Zr16O+, 94Mo16O+ and 70Zn40Ar+) and isobaric interferences (e.g., Pd, In and Sn) to Cd isotope measurements were quantitatively evaluated. When the measured solution has Ag/Cd ≤ 5, Zn/Cd ≤ 0.02, Mo/Cd ≤ 0.4, Zr/Cd ≤ 0.001, Pd/Cd ≤ 5 × 10−5 and In/Cd ≤ 10−3, the measured Cd isotope data were not significantly affected. The intermediate measurement precision of pure Cd solutions (BAM I012 Cd, Münster Cd and AAS Cd) was better than ± 0.05‰ (2s) for δ114/110Cd. The δ114/110Cd values of soil reference materials (NIST SRM 2709, 2709a, 2710, 2710a, 2711, 2711a and GSS‐1) relative to NIST SRM 3108 were in the range of −0.251 to 0.632‰, the δ114/110Cd values of rock reference materials (BCR‐2, BIR‐1, BHVO‐2, W‐2, AGV‐2, GSP‐2 and COQ‐1) varied from −0.196‰ to 0.098‰, and that of the manganese nodule (NOD‐P‐1) was 0.163 ± 0.040‰ (2s, n = 8). The large variation in Cd isotopes in soils and igneous rocks indicates that they can be more widely used to study magmatic and supergene processes.

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Section: Methodsmentioning

confidence: 99%

High‐Precision Cd Isotope Measurements of Soil and Rock Reference Materials by MC‐ICP‐MS with Double Spike Correction

Liu

Zhang

et al. 2019

Geostandard Geoanalytic Res

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“…%, averaging 15-20 wt. %, and 256-8171 µg/g Cd, 1.77-239 µg/g Ge, 0.74-182 µg/g Ga, 23.5-are more than 4567 t, 329 t and t, respectively (Si et al, 2006(Si et al, , 2011(Si et al, , 2013Zhu et al, 2017).…”

Section: Ore Bodiesmentioning

confidence: 98%

“…1b,(2)(3). A principal feature of these deposits is that they are rich in Ag, Cu, Cd, Ge and Ga (Si et al, 2006;Ye et al, 2011;Zhu et al, 2017).…”

Section: Regional Geology Of the Fule Districtmentioning

confidence: 99%

“…1b) (Zhou et al, 2001;Huang et al, 2010;Bao et al, 2017), which is considered to be a typical representative of the unique SYG-type deposits (related to the ELIP) in the western Yangtze Block (Huang et al, 2010). In spite of this, there is still debate on the ore genesis type, including whether it is a distal magmatic hydrothermal-type (based on geological evidence: Liu and Lin, 1999), stratabound-type (based on trace element data: Si et al, 2006Si et al, , 2011 or MVT (based on Cd isotopic data: Zhu et al, 2017). Hence, the Fule deposit provides an ideal case for understanding the role of magmatism during the formation of carbonate-hosted Pb-Zn deposits.…”

Section: Introductionmentioning

confidence: 99%

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Ore genesis of the Fule Pb Zn deposit and its relationship with the Emeishan Large Igneous Province: Evidence from mineralogy, bulk C O S and in situ S Pb isotopes

et al. 2018

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Magmatic activity plays an important role in mineralization, but little is understood of its role with respect to carbonate-hosted stratabound epigenetic Pb-Zn deposits. The Fule Pb-Zn deposit (~10 Mt of sulfide ore with mean grades of 15-20 wt. % Zn + Pb), is stratigraphically placed in middle Permian strata and spatially (~1 m) associated with late Permian continental flood basalts of the Emeishan Large Igneous Province (ELIP). It thus provides an ideal case to investigate its genetic relationship with the ELIP. In addition, the Fule deposit is characterized by high concentrations of Ag, Cd, Ge and Ga, and contains a variety of Cu and Ni sulfide minerals. Syn-ore calcite (δ 13 C = +2.57-+3.01‰) and associated fluids (δ 13 C = +2.96-+3.40‰) have δ 13 C values similar to those of fresh limestone (δ 13 C = +1.58-+2.63‰), but the δ 18 O values of calcite (+16.83-+19.92‰) and associated fluids (+7.80-+10.89‰) are distinctly lower than those of limestone (δ 18 O = +21.85-+23.61‰). This means that C is mainly derived from limestone, whereas the O isotope signature may be related to water/rock (W/R) interaction between mantle and/or metamorphic fluids and limestone. δ 34 S values of sulfide minerals obtained by in situ NanoSIMS and conventional bulk techniques record a range of +9.8-+23.1‰ and +10.04-+16.43‰, respectively, reflecting the enrichment of heavy S isotopes in the oreforming fluids and thermochemical sulfate reduction (TSR) is the principal mechanism for the formation of S 2-. Cores of sulfide crystals have much higher δ 34 S values than their rims, indicating a probable mixture of multiple S reservoirs and/or a dynamic fractionation of S isotopes occurred during sulfide precipitation. The uniform femtosecond (fs) LA-MC-ICPMS in situ Pb isotopic data for galena plot in the field that differs from any of the three potential 3 sources in the region. Such signatures demonstrate that metal Pb was most likely derived from a well-mixed source of basalts, sedimentary rocks and basement rocks. We propose that (a) the enrichment in Ag, Cu, Ni, Cd, Ge and Ga, and the isotope signatures of hydrothermal minerals in the Fule region are related to fluids derived from or flowed through multiple reservoirs; (b) Emeishan magmatism provided heat, elements and associated fluids, and its basalts acted as an impermeable and protective layer; and (c) fluid mixing caused TSR, and then resulted in W/R interaction and CO2 degassing, all of which played a key role in the precipitation of hydrothermal minerals.

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“…Although extensive research on these Pb-Zn deposits has contributed greatly to our understanding of the metallogeny, the sources of mineralizing elements and associated fluids remain controversial (e.g. Zheng and Wang, 1991;Zhou CX et al, 2001;Xu et al, 2014;Zhou JX, et al, 2014b;Wei et al, 2015;Zhu et al, 2017).…”

mentioning

confidence: 99%

In situ Pb and bulk Sr isotope analysis of the Yinchanggou Pb-Zn deposit in Sichuan Province (SW China): Constraints on the origin and evolution of hydrothermal fluids

Tan

Zhou

et al. 2017

Ore Geology Reviews

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The Yinchanggou Pb-Zn deposit, located in southwestern Sichuan Province, western Yangtze Block, is stratigraphically controlled by late Ediacaran Dengying Formation and contains > 0.3 Mt metal reserves with 11 wt. % Pb + Zn. A principal feature is that this deposit is structurally controlled by normal faults, whereas other typical deposits nearby (e.g. Maozu) are controlled by reverse faults. The origin of the Yinchanggou deposit is still controversial. Ore genetic models, based on conventional whole-rock isotope tracers, favor either sedimentary basin brine, magmatic water or metamorphic fluid sources. Here we use in situ Pb and bulk Sr isotope features of sulfide minerals to constrain the origin and evolution of hydrothermal fluids. The Pb isotope compositions of galena determined by femtosecond LA-MC-ICPMS are as follows: 206 Pb/ 204 Pb

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Cadmium isotope fractionation in the Fule Mississippi Valley-type deposit, Southwest China

Cited by 64 publications

References 36 publications

High‐Precision Cd Isotope Measurements of Soil and Rock Reference Materials by MC‐ICP‐MS with Double Spike Correction

High‐Precision Cd Isotope Measurements of Soil and Rock Reference Materials by MC‐ICP‐MS with Double Spike Correction

Ore genesis of the Fule Pb Zn deposit and its relationship with the Emeishan Large Igneous Province: Evidence from mineralogy, bulk C O S and in situ S Pb isotopes

In situ Pb and bulk Sr isotope analysis of the Yinchanggou Pb-Zn deposit in Sichuan Province (SW China): Constraints on the origin and evolution of hydrothermal fluids

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