PORPHYRY-TYPE MOLYBDENUM DEPOSITS IN THE EASTERN QINLING MO BELT, CENTRAL CHINA

被引：0
|
作者：
Fan Hongrui
Xie Yihan (Institute of Geology Chinese Academy of Sciences. Beijing 100029)
机构：
来源：
Scientia Geologica Sinica | 1999年 / 01期
关键词：
CO; CENTRAL CHINA; PORPHYRY-TYPE MOLYBDENUM DEPOSITS IN THE EASTERN QINLING MO BELT; Ca; Li; Ph;
D O I：
暂无
中图分类号：
P618.65 [钼];
学科分类号：
0709 ; 081803 ;
摘要：
The Eastern Qinling mineralizing belt of porphyry-type Mo deposits is located in the south margin of North China Platform. About 40% explored Mo resources of China are stored in that belt. Mo mineralization is related with Yanshanian （161-104Ma） small intermediate to acidic porphyry bodies. As the porphyry bodies intruded into Archean to middle Proterozoic carbonate rocks and alumino-silicate rocks, porphyry-type, sham-type and hornfels-type Mo ores were formed with different types of wallrock alteration. Ore-forming fluids are characterized by H2O-CO2-NaCl with lower to middle saline （0-l2.7% NaCl）. Oxygen and hydrogen isotope data suggest that ore-forming fluid of the early stage is mainly magmatic water. Along with evolution of mineralization to late stage, ratio of magmatic water decreased and meteoric water added.
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页码：91 / 101
页数：11
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