江西永平十字头钼矿床控矿因素浅析

The Ore Controlling Factors and Ore Genesis Analysis of Shizitou Molybdenum Deposit in Yongping,Jiangxi Province

通过详细的野外调查,认为永平十字头钼矿床与十字头似斑状黑云母花岗岩体二者有密切的成因联系,十字头似斑状黑云母花岗岩体为成矿作用的进行提供了必要的成矿物质和能量,是本区成矿的第一要素.区内近东西向的萍乡-广丰深断裂与南北向大断裂为本区矿床形成的导矿构造,同时这两深大断裂也为本区深部控岩构造;区内断层F_1和F_2应为本区矿床的配矿构造,十字头岩体接触带对十字头钼矿具有明显的控制作用,为主要的容矿构造;地层和地层中发育的裂隙、节理及断层也是重要的容矿部位.

Through detailed field investigation, it is considered that the deposit has close genesis links with the Shizitou porphyraceous biotite granite rock body. The Shizitou porphyraceous biotite granite rock body provides necessary metallo- genie materials and energy, and is the most important metallogenic factor of the area. The deep fault near EW-striking Pingxiang-Guangfeng and the NS-striking deep fault are the ore-transmitting structures as well as the rock-controlling struc- ture of the area. The F1 and F2 faults within the area shall be the ore-distributing structure. The Shizitou rock body contact zone has strong controlling effect on the Shizitou molybdenum deposit and is the major ore-hosting structure. The fissures, joints and faults of the stratum are also important ore-hosting structures. Based on the geological features and ore-controlling factor of the Shizitou deposit and existing geo-chemical data, it is inferred that the deposit belongs to porphyry type molyb- denum deposit formed from the Yanshanian acidic magma hydrothermat metallogenesis.