Characteristics of the Sulfur and Lead Isotope Compositions of the Polymetallic Deposit in the Liaoji Rift and Their Geological Significance
详细信息
- 责任者：Ma Yubo (Key Laboratory of Metallogeny and Mineral Assessment ; MLR ; Institute of Mineral Resources ; CAGS ; Beijing 100037 ; China) ; Xing Shuwen
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(9)
- 关键词：铅锌矿床 ; lead-zinc deposit ; 金矿 ; gold ores ; 辽宁 ; Liaoning Province
- 页码：p.1399-1410
- 图表：8 illus., 2 tables, 42 refs.
- 分类号：1001
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Plenty of Pb-Zn-Au polymetallic deposits are hosted in the Liaoji rift,and this study chose the Zhenzigou Pb-Zn deposit in Qingchengzi,Baiyun Au deposit,Wulong Au deposit,Huanggoushan Pb-Zn deposit and Linjiang Au deposit as the objective of the research to analyze sulfur and lead isotope and its geological significance.The results show that theδ34 SCDT values of Zhenzigou veined Pb-Zn vary from-10.3‰6.8‰,the δ34SCDT values of Baiyun Au deposit vary from-7.7‰1.9‰,the δ34SCDT values of Wulong Au deposit vary from 0.8‰3.6‰,the δ34SCDT values of Huanggoushan Pb-Zn deposit vary from 6.7‰17.8‰,the δ34SCDT values of Linjiang Au deposit vary from 0.7‰1.5‰.There are two sulfur sources in the polymetallic deposit in the Liaoji rift:one is formation sulfur and the other is magmatic sulfur.Layered ore body of the Zhenzigou Pb-Zn deposit belongs to the first type,and the sulfur in veined Pb-Zn ore body,Baiyun Au deposit,Wulong Au deposit and Linjiang Au deposit belong to the latter type.The formation sulfur is contaminated by the later magmatic sulfur.The Pb isotope compositions of these deposits vary greatly.The 206Pb/204 Pb,207Pb/204 Pb and 208Pb/204 Pb range respectively within 15.32 16.43,15.7224.02and 34.9639.79,but every deposit has its own characters.Theμvalue of ore lead isotope in the study ares are relative concentrated and high,showing characteristics of upper crust lead source and contaminated different lead isotope.Lead isotope of veined Pb-Zn ore body and rock body in Zhenzigou are mixed lead,with ore lead of veined ore body lead being mixture of upper crust lead and mantle lead and the lead of rock body being mixed one of orogenic belt lead and upper crust lead.Ore lead of the Baiyun Au deposit is orogenic belt lead,while rock body lead is mixed with upper crust lead and mantle lead.Lead isotope of the Wulong Au deposit is mainly orogenic belt lead,coupled with contamination of mantle lead.Two lead types were developed in the Huanggoushan Pb-Zn deposit,one is normal lead,which contains minor thorium and mainly from united source bed and the other is radiogenic lead（Uranium lead）.But ore lead of the Linjiang Au deposit belongs to uranium lead type.