Genesis of the Beixiang Sb-Pb-Zn-Sn Deposit and Polymetallic Enrichment of the Danchi Sn-Polymetallic Ore Belt in Guangxi, SW China

Antimony deposits contain little Sn, whereas Sb and Pb are not the principally contained metal of granite-related Sn deposits. The Danchi Sn-metallogenic ore belt (DSOB) in southwestern China is characterized by Sn-Sb-Zn-Pb co-enrichment, yet triggers poorly constrained. Beixiang deposit southern DSOB consists stage I Sn-Zn II Sb-Pb-Zn mineralization. Here, we analyzed cassiterite U-Pb age, fluid inclusion H-O sulfide Pb-S isotopes, calcite trace elements ores. By comparing with Dachang Mangchang Sn-polymetallic ore-fields within DSOB, constrained timing regional mineralization revealed processes causing Sb-Pb co-enrichment. dating yielded 90.6 ± 4.5 Ma (MSWD = 2.6), similar to ages fields, indicating Late Cretaceous event throughout DSOB. inclusions from have δ18OH2O (−2.8 −7.8‰) δDV-SMOW (−90.5 −59.3‰), synchronous features low REE contents, upward-convex patterns, weak Eu anomalies. These suggest that fluids were derived meteoric water oil field brine, which dissolved S local strata as recorded sulfur (δ34SV-CDT −6.2 −4.0‰) isotopes. However, higher contents (La/Yb)N, strong positive anomalies, Sn-rich released greisenization granite. Overall, combination granitic magma- brine-derived fluids, rich Sb-Pb-Zn, respectively, caused co-enrichment Sn-Sb-Pb-Zn