| 初论中国金矿床的成矿时代 |
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| 引用本文： | 李俊建.初论中国金矿床的成矿时代[J].地质调查与研究,1997(1). |
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| 作者姓名： | 李俊建 |
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| 作者单位： | 中国地质科学院天津地质矿产研究所 |
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| 摘 要： | 本文基于中国５０个岩金矿床８４组直接测年数据，提出中国金矿床具“一老（２５００－１８００Ｍａ）一新（２８０－１００Ｍａ）”的成矿格架。区域分布上，前寒武纪形成的金矿床成矿年代为“西低东高”，而显生宙金矿为“西高东低”。中国金矿床最重要类型为绿岩带型金矿。测年方法上，应采用单颗粒含铀矿物Ｕ－Ｐｂ法，而４０Ａｒ／３９Ａｒ、Ｋ－Ａｒ法和Ｒｂ－Ｓｒ等时线法仅适于测定显生宙形成的金矿床。
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| 关 键 词： | 成矿时代 金矿床 中国 |
A PRIMARY DISCUSSION ON METALLOGENIC EPOCH OF CHINA'S GOLD DEPOSITS |
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| Li Junjian.A PRIMARY DISCUSSION ON METALLOGENIC EPOCH OF CHINA''''S GOLD DEPOSITS[J].Geological Survey and Research,1997(1). |
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| Authors: | Li Junjian |
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| Abstract: | Based on the age-dating values from eighty-four pieces of rock samples in fifty China'sgold deposits, the metallogenic epoch of China's gold dePOsits constitutes the metallogenicframework, include one older epoch (2500-1800 Ma) and one younger epoch (280-100Ma). Theregional distribution of metallogenic epoch shows regular variation, the epoch of Precambrian golddeposits gradually increases from west to east of China, while that of Phanerozoic gold depositsgradually decreases. Gold deposits of greenstone belt type are the most important one in China.As to age-dating methods, the author recommends that single Uranium-bearing mineral U-Pbmethod is to be adopted for the precambran gold deposits, but for the Phanerozonic one the 40Ar/39Ar, K-Ar and Rb-Sr isochron methods are recomended. |
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| Keywords: | metallogenetic epoch gold deposit China |
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