湖北随州淮河-小林地区断裂控矿性研究及找矿方向

Research on ore-contrlling fracture and prospecting direction in Huaihe-Xiaolin area of Suizhou,Hubei Province

淮河-小林地区是北淮阳金银多金属成矿带的重要成矿地段之一,成矿条件优越,断裂构造为区内的主要控矿因素。断裂按走向可分为NW向、NE向、(近)S-N向、(近)E-W向。不同方向的断裂具有不同的形成机理,不仅可以导通岩浆房及成矿流体汇集区,还是成矿流体运移、沉淀的极佳场所。从断裂蚀变带的控金性来看,NE向最好,其次为NW向、S-N向;从断裂蚀变带的控银性来看,S-N向最好,其次是E-W向,再次是NE向。本文研究认为叶家小湾金矿及其外围、陈家寨银矿及其外围是金银找矿的重要地段。

Huaihe-Xiaolin area is one of the important mineralization zones of North Huaiyang Au-Ag poly- metallic metallogenic belt, of which faulted structures are the main control factors of the deposits. Fractures can be subdivided to four groups according to occurrence： the NW, NE trending, （nearly） S-N trending, （nearly） E-W trending. Different trending faults have different formation mechanism, not only can decide the conduction of magma chamber and ore-forming fluid collection area, but also the migration of ore forming fluids and precipita- tion places. The gold deposits are mainly controlled by NE-trending faults, followed by the NW-trending and S-N trending faults, while the silver deposits are favorable for N-S trending faults, and then E-W and NE trending faults. This study suggests that Yejiaxiaowan gold deposit and its periphery, Chenjiazhai silver deposit and its pe- riphery are most potential area for further prospecting.