In-situ trace elements and sulfur isotope compositions of sulfides in the Yangla Sb-W deposit, Yunnan: Constraints on ore-forming fluid evolution and material sources

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Key Points

To clarify the ore-forming mechanisms of the Yangla Sb-W deposit by analyzing trace elements and sulfur isotopes of sulfides.
Conducted field geological surveys and petrographic observations.
Divided mineralization processes into five stages and performed in-situ micro-element and sulfur isotope analyses.
Utilized LA-ICP-MS and LA-MC-ICP-MS techniques to analyze sulfides.
S1-S3 stages of pyrite showed low Co, high Te, and low Se characteristics, indicating medium to low temperature reducing fluid conditions.
The continuous decrease in Co content suggests cooling and thermal mixing, while increased pH values led to the precipitation of antimony and tungsten minerals.
Sulfur isotope values in different stages indicated that mineralization mainly sourced from crustal granite, with early contributions from biogenic sulfur.

Analyzes ore-forming fluids in Yangla Sb-W deposit, indicating mineral sources and stages of evolution.

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Li et al. (2026) studied this question.

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