马来西亚沙捞越西部Punda金铜矿床构造控矿作用及找矿意义

沙捞越西部Punda金铜矿床为浅成-半浅成角砾岩筒控制的典型高硫化型浅成低温热液矿床.控矿角砾岩筒的分布受线性走滑断裂构造控制,角砾岩筒垂直分带明显.角砾岩筒上段的塌陷角砾岩与矿化关系密切,中段的流化角砾岩、边部的水压角砾岩和下段的爆发角砾岩还未出露.根据角砾岩的垂直分带特点,该角砾岩筒剥蚀较浅,矿床保存条件良好,具有较大的深部找矿潜力.

STRUCTURAL CONTROLS ON MINERALIZATION AND ITS ORE- PROSPECTING SIGNIFICANCE IN THE PUNDA GOLD-COPPER DEPOSIT OF WEST SARAWAK, MALAYSIA

Punda gold-copper deposit is a typical high sulphidation type epithermal deposit controlled by hypabyssal breccia pipe structure. The hypabyssal breccia pipe structure is located in the intersection segments of linear strike faults, and possesses distinct vertical zonation. Collapse breccias in the superficial parts or topside of the hypabyssal pipe are related with the gold-copper mineralization. Rheomorphic breccia in the middle segment of the pipe, hydrofracturing breccia in the boundary of the pipe and explosive breccia in the bottom of the pipe have not been discovered in the drilling holes. According to the vertical zonation and denudation situation of the Punda breccia pipe, it is concluded that the denudation depth just reaches to the superficial segment or topside of the pipe, and the preserve conditions of Punda gold-copper deposit is relatively good. Therefore, Punda gold-copper deposit has an excellent exploration prospecting in the west Sarawak of Malaysia.