广西凌云县宏福金矿地质特征及成因分析

凌云县宏福金矿形成于中三叠统百逢组底部,呈似层状、脉状产出。矿体位于中三叠统百逢组和二叠纪海绵礁灰岩不整合界面上,属典型不整合面控矿型矿床。矿床成因,碳酸盐岩与碎屑岩接触,在构造应力作用下接触带易产生继承性复活活动。在接触带处热液作用下,金的络合物分解析离,在接触带富集形成矿化层。

Geological characteristics and genesis analysis of Hongfu gold deposit,Lingyun County,Guangxi

The Hongfu gold deposit in Lingyun county was formed at the bottom of Baifeng formation of Middle Triassic,which is similar to stratiform and vein.The ore body is located at the unconformity interface between Baifeng formation of Middle Triassic and sponge reef limestone of Permian,which is a typical unconformity controlled ore deposit.The genesis of the deposit is that the carbonate rocks are in contact with the clastic rocks,and the contact zone is prone to generate inherited reactivation under the action of structural stress.Under the action of hydrothermal solution at the contact zone,the complex of gold decomposes and separates,and forms mineralized layer in the contact zone.