The Fe-Zn Isotopic Characteristics and Fractionation Models: Implications for the Genesis of the Zhaxikang Sb-Pb-Zn-Ag Deposit in Southern Tibet
Joint Authors
Zheng, Youye
Wang, Da
Mathur, Ryan
Wu, Song
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-23, 23 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-20
Country of Publication
Egypt
No. of Pages
23
Main Subjects
Abstract EN
The genesis of the Zhaxikang Sb-Pb-Zn-Ag deposit remains controversial.
Three different geological environments have been proposed to model mineralization: a hot spring, a magmatic-hydrothermal fluid, and a sedimentary exhalative (SEDEX) overprinted by a hot spring.
Here, we present the electron probe microanalysis (EPMA) and Fe-Zn isotopic data (microsampled) of four samples from the first pulse of mineralization that show annular textures to constrain ore genesis.
The Zn/Cd ratios from the EPMA data of sphalerite range from 296 to 399 and overlap the range of exhalative systems.
The δ 56Fe values of Mn-Fe carbonate and δ 66Zn values of sphalerite gradually decrease from early to late stages in three samples.
A combination of the EPMA and isotopic data shows the Fe-Zn contents also have different correlations with δ 66Zn values in sphalerite from these samples.
Rayleigh distillation models this isotope and concentration data with the cause of fractionation related to vapour-liquid partitioning and mineral precipitation.
In order to verify this Rayleigh distillation model, we combine our Fe-Zn isotopic data with those from previous studies to establish 12 Fe-Zn isotopic fractionation models.
These fractionation models indicate the δ 56Fe i and δ 66Zn i values (initial Fe-Zn isotopic compositions) of the ore-forming system are in the range of - 0.5 ‰ ~ − 1 ‰ and - 0 .
28 ‰ ~ 0 ‰ , respectively.
To conclude, the EPMA data, Fe-Zn isotopic characteristics, and fractionation models support the SEDEX model for the first pulse of mineralization.
American Psychological Association (APA)
Wang, Da& Zheng, Youye& Mathur, Ryan& Wu, Song. 2018. The Fe-Zn Isotopic Characteristics and Fractionation Models: Implications for the Genesis of the Zhaxikang Sb-Pb-Zn-Ag Deposit in Southern Tibet. Geofluids،Vol. 2018, no. 2018, pp.1-23.
https://search.emarefa.net/detail/BIM-1157275
Modern Language Association (MLA)
Wang, Da…[et al.]. The Fe-Zn Isotopic Characteristics and Fractionation Models: Implications for the Genesis of the Zhaxikang Sb-Pb-Zn-Ag Deposit in Southern Tibet. Geofluids No. 2018 (2018), pp.1-23.
https://search.emarefa.net/detail/BIM-1157275
American Medical Association (AMA)
Wang, Da& Zheng, Youye& Mathur, Ryan& Wu, Song. The Fe-Zn Isotopic Characteristics and Fractionation Models: Implications for the Genesis of the Zhaxikang Sb-Pb-Zn-Ag Deposit in Southern Tibet. Geofluids. 2018. Vol. 2018, no. 2018, pp.1-23.
https://search.emarefa.net/detail/BIM-1157275
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157275