摘要
滇黔桂与秦岭地区是中国卡林型金矿两大集中分布区，选取了两大矿集区30余个典型的矿点，对两大矿集区的矿床地质、稳定同位素（O、D、C、S）、Pb同位素、稀土元素和流体包裹体进行了系统对比，探索了各矿集区的成矿物质来源、成矿物理化学条件及其地质制约。两大矿集区卡林型金矿特征具有相似点，成矿时间主要集中在100－200Ma之间，赋存围岩较为广泛，成矿流体具有混合性、以大气降水为主，成矿物质．总体来源于围岩，控矿构造以压扭性为主，成矿条件为浅成、中低温、高硫低氧的中酸性环境。由于秦岭地区处于板块边缘，流体、物质成分来源相对较为复杂，深部流体参与成矿的特征明显；而滇黔桂地区为板块内部矿集区，流体、物质成分来源相对较为单一，成矿温度相对较低；区域成矿特色的差异是由其所处构造地质背景不同造成的。
The Dianqiangui and Qinling areas are the most important mineralizing district of Carlin-type gold deposit in China. A comparison of geological settings, stable isotopes（O, D, C, S）, Pb isotope, rare earth elements and fluid inclusion data provided insights into similarity and differences in the source of oreforming materials, nature and physico-chemical conditions of ore fluids and geological controls on mineralization. The Carlin-type gold deposits in the two areas are chracterized by. （1） mineralization age ranging from 100 to 200 Ma, （2）the deposits hosted in a brand spectrum of rocks both in terms of age and lithology,（3）the ore-forming fluid dominated by mteoric solutions, with additional magmatic or mantle-derived components in some deposits, with temperature of 150--300℃ and low f（O2）, （4） the metallogenic materials mainly derived from host rock, and （5）ore bodies chiefly controlled by shear-compressional structures. Relative complexity of ore materials and fluid sources and higher temperature of mineralization fluids in the Qinling area is largely due to its orogenic affinity, while simplicity and low temperature in the Dianqiangui area is consistent with its intra-cratonic setting.
出处
《地质科技情报》
CAS
CSCD
北大核心
2008年第3期51-60,共10页
Geological Science and Technology Information
基金
教育部跨世纪人才培养计划
高等学校学科创新引智计划(B07011)
国家自然科学基金项目(40572063)
中国地质大学地质过程与矿产资源国家重点实验室开放基金项目
关键词
卡林型金矿
成矿物质来源
成矿流体
成矿条件
秦岭
滇黔桂
Carlin-type gold deposit
ore-forming material source
ore-forming fluid
ore-forming condition
Qinling
Dianqiangui
