摘要
应用裂变径迹法研究成矿时代是一新的尝试。东昆仑地区洪水河金矿岩浆隐爆角砾岩矿化体锆石和磷灰石的裂变径迹年龄分别为 193 7Ma和 150 9Ma ,磷灰石的裂变径迹平均长度为( 9 6± 3 2 ) μm。结合地质特征 ,认为其代表了成矿热事件的活动时代和特征。磷灰石裂变径迹对热历史的模拟演化表明 :该矿区至少经历三期热液蚀变作用 ,整体矿化时间较长 ,其中 ,早期温度较高、冷却速率较大。
It is a new attempt to study mineralization age using fission track method.The fission track ages of zircon and apatite from mineralizing magmatic cryptoexplosion breccia in Hongshuihe gold ore district,eastern Kunlun Mountains,are 193.7 Ma and 150.9 Ma,respectively.The mean fission track length in apatite is (9.6±3.2) μm.They reflect the ages and characteristics of mineralizing thermal events in accordance with geological setting.Forward model based on apatite fission track analysis indicates this ore district went through 3 hydrothermal alterations at lest and about 100 Ma mineralization duration,in which there was higher temperature in the early than in the late.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2000年第z1期57-60,共4页
Atomic Energy Science and Technology
基金
中国科学院核分析技术开放研究实验室
国家博士后基金资助项目
关键词
裂变径迹定年
裂变径迹
金矿床
成矿时代
热历史
东昆仑
fission track chronometry
fission track
gold deposit
mineralization age
thermal history
Eastern Kunlun Mountains
