广东省电白县马踏金矿地质特征及找矿标志

Geological Characteristics and Prospecting Criteria of Mata Gold Deposit in Dianbai County,Guangdong Province

通过对广东省电白县马踏金矿的地质特征及找矿标志的研究,表明本区含金矿体受到一条压扭性F1断裂破碎带的严格控制,且多为脉状分布。区域内的岩浆主要为燕山三期塘口岩体。热液蚀变主要发育于F1断裂破碎带内部,包括硅化、黄铁矿化、和绢云母化等。研究发现,工作区内存在V1和V2两个金矿体,均赋存于F1压扭性断裂破碎带内,并受到该断裂破碎带的控制。矿石的化学成分显示金属含量升高,主要为Au矿化。本区金矿的主要控矿因素是F1压扭性断裂破碎带,而硅化和黄铁矿化等蚀变矿物则成为寻找矿藏的标志。本文进一步表明,压扭性断裂破碎带是寻找金矿的关键,硅化和黄铁矿化等蚀变标志对于寻找含金断裂破碎带和矿体具有指导意义。

The geological characteristics and prospecting criteria of Mata gold deposit in Dianbai County,Guangdong Province are studied.The results show that the gold ore bodies in this area are strictly controlled by a compression-torsion F1 fracture zone,and most of them are distributed in vein.The magma in this area is mainly the Tangkou pluton of the third Yanshan Stage.The hydro‐thermal alteration mainly developed in the fracture zone of F1,including silicification,pyritization,and sericitization.It is found that there are two gold orebodies V1 and V2 in the working area,both of which exist in the F1 compression-torsion fracture zone and are controlled by the fracture zone.The chemical composition of the ore shows an elevated metal content,mainly Au mineralization.The main ore-controlling factor of the gold deposit in this area is F1 compression-torsion fracture zone,and alteration minerals such as silicification and pyritization are the signs of searching for mineral deposits.The paper further shows that the compression torsional fracture zone is the key to finding gold deposits,and the alteration markers such as silicification and pyritization are of guid‐ing significance to finding gold bearing fracture zones and orebodies.