• 首页
  • 学报简介
  • 编委会
  • 投稿指南
  • 订阅指南
  • 过刊浏览
  • 在线投稿
  • 联系我们
  • 网络预出版
  • English

本文将参加年度优秀论文评选,如果您觉得这篇文章很好,请投下您宝贵的一票,谢谢! 支持(0)   不支持(0)

浙江治岭头钼铅锌金多金属矿床矿质来源的硫、铅同位素示踪及成矿时代
投稿时间:2019-07-09  修订日期:2019-11-22  点此下载全文
引用本文:楚克磊,陈小荣,齐刚,高翔,胡博,李胜进.2020.浙江治岭头钼铅锌金多金属矿床矿质来源的硫、铅同位素示踪及成矿时代[J].地质学报,94(8):2325-2340.
CHU Kelei,CHEN Xiaorong,QI Gang,GAO Xiang,HU Bo,LI Shengjin.2020.Sulfur and lead isotope tracing for sources of ore- forming material and ore- forming age of the Zhilingtou Mo- Pb- Zn- Au polymetallic deposit in the Zhejiang Province[J].Acta Geologica Sinica,94(8):2325-2340.
DOI:10.19762/j.cnki.dizhixuebao.2020034
摘要点击次数: 102
全文下载次数: 59
作者单位E-mail
楚克磊 1) 中国地质科学院北京100037
2) 南京大学内生金属矿床成矿机制研究国家重点实验室南京210093 
chukelei@163.com 
陈小荣 3) 浙江省第七地质大队浙江丽水323000  
齐刚 3) 浙江省第七地质大队浙江丽水323000  
高翔 3) 浙江省第七地质大队浙江丽水323000  
胡博 3) 浙江省第七地质大队浙江丽水323000  
李胜进 3) 浙江省第七地质大队浙江丽水323000  
基金项目:本文为南京大学内生金属矿床成矿机制研究国家重点实验室开放基金项目(2018- LAMD- K10)和中国地质科学院基本科研业务费课题(编号JYYWF20180601)共同资助成果。
中文摘要:治岭头矿床上部(火山岩盖层)以铅锌矿床、硫矿床为主,中间(变质岩基底)以金银矿、铅锌矿为主,深部(侵入岩体)以斑岩型钼矿床为主的“三层楼”模式。本文在前人研究的基础上,通过辉钼矿Re- Os同位素定年技术对治岭头矿床进行了成矿时代的厘定。6件辉钼矿样品的模式年龄为113. 7~114. 6 Ma,加权平均年龄为114. 03±1. 78 Ma,表明治岭头钼多金属矿床成矿作用发生于早白垩世晚期。该矿床辉钼矿样品的Re含量变化于16. 05×10 -6 ~66. 29×10 -6 ,表明其成矿物质具有壳幔混源的特征。矿石硫同位素组成变化范围较窄(-2. 1‰~2. 6‰),具有相对均一的来源,可能主要来自上地幔或下地壳的深源岩浆,但也可能受到陆壳沉积物的混染。治岭头钼铅锌金多金属矿床矿石铅同位素组成变化范围比较小, 208 Pb/ 204 Pb、 207 Pb/ 204 Pb、 206Pb/ 204Pb的范围分别为38. 765~39. 137、15. 523~15. 751、18. 450~18. 667,具有明显的壳幔混合特征。治岭头钼多金属矿床成矿年龄的厘定为下一步在区内开展同时期的斑岩成矿系统找矿勘探提供了重要的线索,同时为进一步深入研究中国东南沿海大陆边缘成矿带成岩成矿作用提供了新的资料和证据。
中文关键词:治岭头钼铅锌金多金属矿床  辉钼矿Re- Os定年  成矿物质来源  东南沿海成矿带
 
Sulfur and lead isotope tracing for sources of ore- forming material and ore- forming age of the Zhilingtou Mo- Pb- Zn- Au polymetallic deposit in the Zhejiang Province
Author NameAffiliationE-mail
CHU Kelei 1) Chinese Academy of Geological SciencesBeijing, 1000372) State Key Laboratory for Mineral Deposits ResearchNanjing UniversityNanjing, 210093 chukelei@163.com 
CHEN Xiaorong 3) No. 7 Geological Party of Zhejiang ProvinceLishui, Zhejiang, 323000  
QI Gang 3) No. 7 Geological Party of Zhejiang ProvinceLishui, Zhejiang, 323000  
GAO Xiang 3) No. 7 Geological Party of Zhejiang ProvinceLishui, Zhejiang, 323000  
HU Bo 3) No. 7 Geological Party of Zhejiang ProvinceLishui, Zhejiang, 323000  
LI Shengjin 3) No. 7 Geological Party of Zhejiang ProvinceLishui, Zhejiang, 323000  
Abstract:The Zhilingtou deposit has a “three- story” mode: the upper part (volcanic rock caprock) is dominated by lead- zinc deposits and sulfur deposits, the middle section (metamorphic rock basement) by gold- silver and lead- zinc deposits, and the deep part (intrusive rock) by porphyry molybdenum deposits. Based on the previous studies, this paper determined the ore- forming age of the Zhilingtou deposit by molybdenite Re- Os isotope dating. The model age of the six molybdenite samples was 113. 7~114. 6 Ma, with a weighted average age of 114. 03±1. 78 Ma, indicating that the mineralization of the Zhilingtou Mo polymetallic deposit occurred in the late stages of the Early Cretaceous. The Re content of the molybdenum sample in this deposit changed from 16. 05×10 -6 to 66. 29×10 -6 , indicating that its ore- forming material has the characteristics of crust- mantle mixed source. The sulfur composition of sulphide has a narrow range of changes (-2. 1‰~2. 6‰), which reaches the equilibrium of isotope fractionation and may be derived mainly from the deep magma of the upper mantle or the lower crust. It has a relatively uniform source of sulfur, but may also be affected by the continental crust. The range of lead isotope composition of the ore minerals from the Zhilingtou Mo- Pb- Zn- Au polymetallic deposit is relatively small. The values of 208 Pb/204 Pb , 207 Pb/ 204 Pb, and 206 Pb/ 204 Pb are 38. 765~39. 137, 15. 523~15. 751, 18. 450~18. 667, respectively, indicate crust- mantle mixing characteristics. The determination of the ore- forming age of the Zhilingtou Mo polymetallic deposit provides an important clue for the prospecting of contemporary porphyry ore- forming systems in the region, and provides new information for further studying the petrogensis and metallogeny of the southeast coastal metallogenic belt.
keywords:Zhilingtou Mo- Pb- Zn- Au polymetallic deposit  molybdenite Re- Os dating  sources of ore- forming materials  southeast coastal metallogenic belt
查看全文  查看/发表评论  下载PDF阅读器
您是第14664535位访问者  京ICP备05032737号-7  京公网 安备110102004559
版权所有:《地质学报》中文版
主管单位:中国科学技术协会 主办单位:中国地质学会
地  址: 北京市西城区百万庄大街26号 邮编:100037 电话:010-68312410,010-68999025 E-mail: dizhixuebao@163.com
本系统由北京勤云科技发展有限公司设计 

京公网安备 11010202007916号

WeChat