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.
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释义
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”。
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