福建政和东际金(银)矿床地质特征及成因初析

The geologic characteristics of the Dongji gold deposit in Zhenghe county,Fujian province

政和东际金(银)矿床贮存于中-晚元古代变质岩与中生代火山岩不整合面侵入的火山流纹斑岩中,矿体受流纹斑岩内部构造控制明显。通过对矿床地质特征和成矿规律的研究,初步认为属次火山热液型金(银)矿床。

The Dongji gold（sliver） deposit in Zhenghe county is situated at the interjunction between the Zhenghe northeast-trend fault zone and the east fringe of Dongkeng volcanic basin.The deposit was discovered in the rhyolite-porphyry（subvolcanic rocks） which is scattered over the unconformaity surface between late proterozoic metamorphics and Mesozoic strata.The orebody is controlled by the internal structure in rhyolite-porphyry.The main useful constituent of the deposit is Au,accompanying Ag.Based on the geological characteristics,metallogenic regularitity,the deposit should belong to subvolcanic thermal type fo deposit.