广东长坑金银矿床成因探讨

长坑金、银矿床主要产于下石炭统与上三叠统不整合面之下的硅质岩中，金、银矿体分离。该矿床位于粤西金、银矿床集中区的东部边缘，从构造及矿床分带位置上看，可能位于金、银矿带的交界处，它与同处于三洲矿田中的南蓬山多金属矿在深部构造上可能有密切的联系。到目前为止，对该矿床的认识主要有三种观点：（１）金矿形成于早石炭世晚期而银矿形成于燕山晚期；（２）金、银矿为同一成矿系统不同演化阶段，金、银对环境变化发生不同

Disscusion on the Genesis of Changkeng Gold- Silver Deposit, Guangdong Province

Gold and silver oredies in Changkeng deposit mainly in siliceous rocks and limestone irnmediately under the uncomformity between the lower CaIdriiferous limestone and the upper Triassic Carhanaceous shale. Changkeng god - silver dempit is situated in the east edge of the concentrated district of gold and silver deposit in the west of Guangong Province.probably, its genesis has relationship with its situation, maybe the intehe between gold and silver deposit zone. There are three kinds of genesis opinion: (1) gold deposit came into beingin the late of early Carboniferous, but the silver carn into being in the late of Yanshan peried;(2) gold and silver formed in different evolution stage of the sam depositing system, because of their different response to the vdriation of phychernical condition; (3) hot spring genesis.