| 爆破角砾岩型金矿床的成因及其定位机制：——以河南祁雨沟金矿为例 |
| |
| 引用本文： | 邵世才.爆破角砾岩型金矿床的成因及其定位机制：——以河南祁雨沟金矿为例[J].矿物学报,1995,15(2):230-235. |
| |
| 作者姓名： | 邵世才 |
| |
| 作者单位： | 中国科学院地球化学研究所!贵阳,550002 |
| |
| 摘 要： | 本文系统地研究了祁雨沟爆破角砾岩型金矿床的地质特征、流体包裹体和硫、铅、氢、氧及碳同位素特征,认为成矿流体和成矿元素主要来自晚期的岩浆熔体,只在成矿晚期有少量大气降水的加入,应属典型的岩浆热液型金矿床。而矿床的形成和定位则是岩浆结晶分异作用的后期,岩浆熔体因水过饱和而发生“二次沸滕”,产生高压流体,从而在地表浅部发生隐爆作用,造成岩体坍塌,含金流体胶结而成含金角砾岩体。岩浆熔体脉动式的“二次沸滕”
|
| 关 键 词： | 金矿床 角砾岩型 成因 定位机制 爆破 |
GENESIS OF THE EXPLOSION BRECCIA-TYPE GOLD DEPOSITS AND THEIR EMPLACEMENT MECHANISM AS EXAMPLIFIED BY THE QIYUGOU GOLD MINE,HENAN PROVINCE |
| |
| Shao shicai.GENESIS OF THE EXPLOSION BRECCIA-TYPE GOLD DEPOSITS AND THEIR EMPLACEMENT MECHANISM AS EXAMPLIFIED BY THE QIYUGOU GOLD MINE,HENAN PROVINCE[J].Acta Mineralogica Sinica,1995,15(2):230-235. |
| |
| Authors: | Shao shicai |
| |
| Abstract: | The Qiyugou gold deposit in Henan Province was hosted in the explosion breccia pipes.Gold mineralization was dated at Late Yanshanian and its oreforming material came from granitic magma at depth with a minor amount of meteoric water involved.Crystallization-differentiation of the magma at depth led to "secondary boiling" of late hydrothermal fluids followed by the explosion and collapse of rockbodies. As a result, explosion breccia pipes were formed, and ore-forming flu id found their way into the breccia pibes and cemented breccias because of the phase separation of fluids in response to the drop of temperature and pressure during explosion. The repeated process-es of fluid boiling, explosion and precipitation would lead to the formation of the explosion breccia-type gold deposits. |
| |
| Keywords: | explosion breccia-type gold deposits ore genesis geochemistry emplacement mechanism |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
