老挝金矿成矿区带和矿化集中区探究  

Study on gold metallogenic belt and mineralization concentrated area of Laos

作　　者：邵长亮[1,2] 王居松 李宗瑾[1] 刘文杰[1] 

机构地区：[1]天津华北地质勘查局,天津300170 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《矿产勘查》2015年第6期787-792,共6页Mineral Exploration

摘　　要：老挝位于"三江"成矿带南延部分,金矿点分布广泛,成矿受构造控制作用明显,主要区域控矿构造为北北西向和北北东向,两条构造带在中北部川圹省交汇,成矿区带上普遍见金异常矿点,其成矿特征是:河流的冲积层中普遍有砂金产出,原生矿床主要为与花岗闪长岩有关的石英脉型和产于碎屑岩中的蚀变岩型、斑岩型金矿,以及产于灰岩中的含金方解石脉型金矿,另外红土型金矿也是老挝金矿类型之一。金矿的集中分布区域特征明显,砂岩型金矿点主要有3个集中区,原生岩金矿点有5个主要的矿化集中区。Lao lies in the south extending area of ‘sanjiang’ metallogenic belt, where gold occurrence distributed widely, and is obviously controlled by geological structures. The main regional ore-control structurals are two faults towards NNW and NNE, they join up in Xianghoang in north central area of Laos, there are widespread gold anomalies on metallogenic belt. The metallogenic characteristics are：gold placer commonly occur in alluvial sediments, primary gold deposit is mainly quartz vein which is related to granite and altered rock and porphyry-type hosted in clastic rock, and gold-bearing calcite veins in limestone. Besides, lateritic gold deposits is also one of gold mine. The Characteristics of concentration region of gold deposits is remarkable, there are three sandstone gold concentration regions, and five primary gold concentration regions.

关 键 词：金矿 成矿区带 矿化集中区 老挝 

分 类 号：P618.51[天文地球—矿床学]