麻栗坡县杨万铜矿老厂坡矿段地质特征及成因

THE GEOLOGICAL FEATURE AND GENESIS OF LAOCHANGPO ORE BLOCK OF YANGWAN CU DEPOSIT IN MALIPO

云南麻栗坡县杨万铜矿矿体呈脉状、似层状产于F1断层破碎带中,矿体的近矿围岩为中三叠统玄武岩组(T_2)之玄武岩、火山质凝灰岩,构造控矿明显。矿床经历了复杂的成矿过程,早期随着中三叠世海相基性火山喷发,沉积了丰富的Cu元素,后期的热液叠加改造,萃取了火山岩中的铜物质产生了铜硫化物,再沿断层破碎带充填交代形成铜矿床。

In Yangwan Cu deposit in Malipo,Yunnan,the orebody is stratoid in the fault F1 fracture zone.The wall rock near orebody is Middle Triassic Basalt Formation（T 2）basalt,volcanic tuff,ore control of structure clear.The deposit has a complicated metallogenesis process.In the early period,Cu sediments following the plentiful Middle Triassic marine basic volcanic rock eruption,the later hydrothermal superimposition and reformation extract the Cu from volcanic rock and form Cu sulfide,then fill,replace and form the Cu deposit along the fault fracture zone.