| 张明贤,徐九华.河南出岔－乱石沟金矿成矿流体地球化学和矿床成因研究[J].地质找矿论丛,1995,(4):60-70 |
| 河南出岔－乱石沟金矿成矿流体地球化学和矿床成因研究 |
| ORE-FORMING FLUID GEOCHEMISTRY AND GENESIS OF THE CHUCHA-LUANSHIGOU GOLD DEPOSIT IN HENAN PROVIVCE OF CHINA |
| |
| DOI：10.6053/j.issn.1001-1412.1995.4. 007 |
| 中文关键词: 金矿 成矿流体 矿质来源 矿床成因 河南小秦岭 |
| 英文关键词: |
| 基金项目: |
|
| 摘要点击次数: 1296 |
| 全文下载次数: 1416 |
| 中文摘要: |
| 流体包裹体地球化学研究表明,出岔-乱石沟金矿床为中高温热液矿床,矿床在弱还原,弱酸性介质中形成,成矿流体以岩浆水为主,晚期叠加部分大气降水的影响,具明显的混合迹象。稳定同位素地球化学与蚀变围岩微量元素聚类分析揭示,矿质来源于下地壳太华群火山碎屑岩系的深熔作用,但其活化、迁移、富集成矿则与晚燕山期酸性岩浆热事件有关。本文研究显示,出岔-乱石沟金矿床的成矿作用是中高温开放体系水-岩反应过程。 |
| 英文摘要: |
| Chucha-Luanshigou gold deposit discovered recently is one of the ore deposits in the Central North Ore Belt of the famous Xiaoqinling Gold Field. Gold-bearing quartz veins are controlled by shear zone. They are distributed in Qiangmayu Group of Archean. Epoch of hydrothermal gold mineralization is further divided into 4 stages. Study on the physical geochemical conditions of fluid inclusions suggest that the deposit is a intermediate-high temperature hypothermal deposit.The stable isotopic data of hydrogene and oxygene and carbon suggest that the fluid of mineralization has characters of magmatic water with the addition of meteoric water. The isotopic composition of sulphur and lead indicate that the material of mineralization was produced by the anatexis of metapyroclastic rocks of Taihua Group, even though its reactivation.mirgration and enrichment is related with granitic activity of Yanshanian. The cluster analysis of alteration wallrock minor elements suggests that Au is closly related to Pb.Ag.Cu, and indicates that Au and Pb are of the same source. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
