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GOLD ABUNDANCE OF ROCKS RELATED TO JINCHANGYU GOLD DEPOSIT

Gao Zhanlin Lin Erwei  
The significance of gold abundance in the formation of gold deposits is a subject worthy of further study. Most gold deposits in the world relate to metamor-phic rocks, but in fact, the gold abundance of these rocks is not so high. Metamor-phic rocks in Jinchangyu district is also low in gold abundance. Amphibolites which are host rocks of the deposits have only 3.1 ppb gold, but the "dissoluble property" of gold in amphibolite is the best among the rocks related to gold-ore deposits, this enables the gold easy to activate, migrate and enrich under suitable metallogenic conditions. Therefore, amphibolites should be the best source rocks of the deposit.
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