老挝琅勃拉邦帕奔金矿地质特征及找矿标志

老挝帕奔金矿处于云南三江成矿带南延部分,区域上是重要的铁、铜、金矿集中区。目前矿区共发现五条金矿体,其赋矿围岩为下二叠统海相碳酸盐岩,均产于北北东向的韧性剪切带裂隙和北北西向次级构造裂隙中。矿区以发育碳酸盐化为特征,按碳酸盐的产出特征可将金矿体分为蚀变岩型（碳酸盐呈微细脉或复脉）、构造破碎带型（碳酸盐呈胶结物）和含金方...

The Geological Characteristics and Prospecting Criteria of the Phabon Gold Deposit,Laos

Phabon gold deposit in Laos is located in the extension part of the southern Sanjiang metallogenic belt in Yunnan Province,which is an important concetrated area of iron,copper and gold deposits.Five gold orebodies have been found in this area,and the host rocks are mainly composed of Permian marine carbonate rocks.The ore-control structures include fractures of NNE ductile shear zone and NNW secondary structure.Carbonatization is the main alteration and it can be classified into three types according to their occurrences： alteration-type,structural fracture zone-type and gold-bearing carbonate vein-type.Inclusion gold and fissure gold occurr in the calcites and pyrites and their fissures.Based on the investigation in the field,it is concluded that this deposit belongs to structural meso-epithermal hydrothermal type gold deposit,and some prospecting indicators from strata,structures and alteration aspects are proposed,which have an reference significance for Au prospecting in Sanjiang metallogenic belt in China.