广东区域构造及与银矿的关系

广东大地构造位于华南加里东地槽褶皱系.其地质构造划分出雪峰—加里东、海西—印支、燕山和喜山4大构造层.主要深—大断裂带分为NE向深—大断裂带、EW向断裂—岩浆岩带和NW向大断裂带.广东银矿床产布主要受海西—印支构造层和NE向深—大断裂带的控制,大多数银矿床分布于粤中—粤西雪峰—加里东褶皱区内,尤其是不同级别构造单元的接触过渡地带.独立、共生银矿床与区域构造关系更为密切.

RELATION BETWEEN REGIONAL STRUCTURES AND SILVER MINERALIZATION IN GUANGDONG PROVINCE

Tectonically, Guangdong is located in the south China Caledonian Geosynclinal Folded System. Four major structural stages are recognizable viz,the Xuefeng-Caledonian,the Hercynian -Indosinian, the Yanshanian and the Himalayan stages. The major deep fracture zones found in Guangdong are of three sets:the NE -SW major deep fracture zones; the E-W fracture-mag-matic zones,and the NW-SE major fracture zones. The distribution of silver deposits are controlled by the NE-SW major deep fracture zones and Hercynian-Indosinian structural layers; most of the silver deposits are found in the Central Guangdong-West Guangdong Xuefeng-Caledonian Folded Region, specif ically in the contact and transitionl areas between tectonic units differing orders. Mineral deposits with silver as a major constituent and those with by-product and co-product silver are all closely related with regional structures.