| 陈振胜,张理刚.蚀变围岩氢氧同位素组成的系统变化及其地质意义——以西华山钨矿为例[J].地质找矿论丛,1990,(4):69-79 |
| 蚀变围岩氢氧同位素组成的系统变化及其地质意义——以西华山钨矿为例 |
| HYDROGEN AND OXYGEN ISOTOPE STUDY ON ALTERED ROCKS AND IT'S GEOLOGICAL SIGNIFICANCE-WITH THE EXAMPLE OF XIHUASHAN TUNSTEN ORE DEPOSIT |
| |
| DOI：10.6053/j.issn.1001-1412.1990.4. 008 |
| 中文关键词: 蚀变岩石体系 氢氧同位素 水/岩交换 叠加蚀变 |
| 英文关键词: |
| 基金项目: |
|
| 摘要点击次数: 1165 |
| 全文下载次数: 1575 |
| 中文摘要: |
| 利用水/岩交换理论对西华山钨矿蚀变岩石氢氧同位素分析结果的研究,确认本区主要赋矿岩石(中粒黑云母花岗岩)经历了两次蚀变。一次为岩浆热液水的面型蚀变,另一次为大气降水热液叠加蚀变。前种蚀变形成的岩石中δ18O 较原岩升高,δD 降低;后者形成的蚀变岩中δ18O 降低,δD受控于高岭石和绢云母。西华山钨矿成矿以岩浆热液作用为主,大气降水对成矿的作用不大。 |
| 英文摘要: |
| Based on the theory of water/rock interaction systematic sampling is carried out for hydrogen and oxygen isotope analysis of the altered rocks in Xihuashan tunsten ore deposit.This paper presents the results showing that the main hosting rock of medium-grained biotite granite undergoes at least two al-teration stages during which altered rocks are formed and systematic variation in hydrogen and oxygen isotopit composition takes place.The first stage is dominated by magma water and the altered rock of alkline-feldsparized granite is produced with higher oxygen ratio and lower hydrogen ratio than that of the medium-grained biotite granite.The second stage is characterized by the overprint of meteoric water on the first.The alkline-feldspar is kaolinized and sericitized resulting in argillic alteration.O-isotope ratio is lowered and H-isotope ratio is controlled by the formation of kaolinite and sericite.The authors emphasize that study of hydrogen and oxygen isotopes,both of the ore-forming fluids and the altered rocks is an effective approach to deal with genesis of ore deposits. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
