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RELATIONSHIP BETWEEN THE ABUNDANCE AND METALLOGENESIS OF GOLD IN PRECAMBRIAN TERRAINS |
WANG Xiao-yong |
No. 6 Gold Geological Party of the Armed Police, PLA, Harbin 150049, China |
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Abstract The granite and strata with high Au abundance have been considered to the source of gold by many geologists.With broad application of the method of neutron activation and chemical-spectral analysis,the accuracy of analysis has greatly improved(up to 0.01×10-9).A wealth of data shows that the Au abundance of metamorphic rocks in greenstone terrains is rather low(0.17×10-9 to 2.40×10-9 in average),and in the relevant granites is only 0.62×10-9 to 1.20×10-9 averagely.This concludes that the concept of source rocks or source beds is ambiguous and non-specific.All rocks are possible to perform as source rocks/beds.The mineralization of gold is not related to the Au abundance in granite and strata,but to the metallogenetic mechanism involving gold activation,migration and enrichment.
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Received: 03 September 2001
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