矿床地质2017，Vol.36Issue(1)：200-218,19.DOI:10.16111/j.0258-7106.2017.01.013
川滇黔地区铅锌矿床稳定同位素地球化学研究现状综合分析
A comprehensive analysis of present situation of geochemical researches on stable isotopes of lead-zinc deposits in Sichuan-Yunnan-Guizhou area
摘要
Abstract
The Sichuan-Yunnan-Guizhou border area is an important lead-zinc polymetallic mineralization area in China.Many superlarge and large lead-zinc deposits such as Huize,Tianbaoshan and Daliangzi have been found.It is considered that the C-O isotopes of lead-zinc deposits in the area indicate that the metallogenic hydrothermal fluids were mainly from the carbonate host rock,and some may came from organic carbon or mantle carbon.The δ13CV-PDB and δ18OV-SMOW values of the calcite of lead-zinc deposits in Weining-Shuicheng fault zones are 0.6‰～ 2.5‰ and 23.3‰～25.5‰,the δ13CV-PDB and δ18OV-SMOW values of lead-zinc deposits in Yadu-Mangdong fault zone are-5.3‰～1.5‰ and 11.3‰～20.9‰,the δ13CV-PDB and δ18OV-SMOW values tend to decrease from southeast to northwest;the δ13CV-PDB and δ18OV-SMOW values of lead-zinc deposits in NS-trending Xiaojiang fault zone show a linear relationship,and tend to decrease.The δ13CV-PDB and δ18OV-SMOW values of lead-zinc deposits in NE-trending fault zones show the characteristics of concentrated consistent distribution.The δD and δ18OH2O values show that ore-forming fluids were mainly the formation water (hot brine and oil field brine).Part of meteoric water and metamorphic water might have taken part in the ore deposition process.Sulfur sources of ore deposits were mainly from Thermochemical Sulfate Reduction (TSR) of contemporary seawater,whereas H2S of reservoir from Bacterial Sulfate Reduction (BSR) which had a rich light-sulfur and might have provided part of the sulfur source for the ore-forming process.The lead-{inc deposits in northwest Guizhou area tend to evolve toward light sulfur from southeast to northwest.The lead-zinc deposits in the NE-trending Xiaojiang fault zone were concentrated,but the sulfur isotope of the lead-zinc deposits in the NE-trending fault zones from SW to NE tends to evolve toward light sulfur,The reaction intensity and reaction rate of TSR may be one of the main reasons for the tendency to evolve toward light sulfur.关键词
地球化学/C、H、O、S同位素/铅锌矿床/川滇黔接壤区/综述Key words
geochemistry/carbon/oxygen/hydrogen and oxygen isotope/lead-zinc deposits/Sichuan-Yunnan-Guizhou border area/comprehensive分类
天文与地球科学引用本文复制引用
仲文斌,张均,王健,杨青,张哲坤,程元路..川滇黔地区铅锌矿床稳定同位素地球化学研究现状综合分析[J].矿床地质,2017,36(1):200-218,19.基金项目
本文为地质调查项目(编号:12120114019701)资助的成果 （编号:12120114019701）
