摘要
国内外很多金矿床成岩与成矿有一定的时差。根据不同年龄测试结果所代表的意义,成岩成矿时差可以分为真时差、似时差和假时差。真时差是相对的,且较难得到,似时差是常用的,而假时差是由缓慢冷却、热扰动和样品的选择不当等因素造成。对成岩成矿时差的解释可归结为深部同源岩浆热液成矿模式、改造成矿模式和深部变质热液成矿模式,不同的模式适合于不同地区不同时间形成的金矿床。
The time gap between rock and ore formation exists in many gold deposits in the world. The time gap may be classified into the real-time gap, quasi-time gap and pseudo-time gap according to the meanings of the ages of rock and ore determined by different methods. The realtime gap is relative, the quasi-time gap is usually used, and the pseudo-time gap results from slowly cooling, thermal reseting, and false sampling. The deep-seated comagmatic hydrothermal mineralization model, modified mineralization model, and deep-seated metamorphic hydrothermal mineralization model may be constructed for the explanations of the real-time gap. Different models may explain different gold deposits formed in different geological times and areas.
出处
《地质论评》
CAS
CSCD
北大核心
1996年第2期154-165,共12页
Geological Review
关键词
金矿床
成岩
成矿
时差
gold deposit, time gap between rock and ore formation, review
