滇西北羊拉铜矿矿床成因及找矿方向

滇西北羊拉铜矿为金沙江构造带上发现的大型铜矿床,因为其经济价值巨大和产出背景的特殊,学者们进行了大量的研究。但是在矿床成因及找矿方向上存在较大分歧。通过对区域成矿地质背景、矿床地质特征、物化探特征和控矿因素分析,发现羊拉铜矿明显受地层、构造和岩浆岩的控制。羊拉铜矿地质主要经历海西期海底火山喷发喷流沉积成矿,印支期至燕山期岩浆热液交代叠加富化形成接触交代型矿体,喜山期构造热液交代充填使矿体进一步富集,为典型的复合成因矿床。根据以上研究提出了找矿方向,为区域找矿提供参考。

Deposit genesis and prospecting direction of Yangla Copper Deposit in Northwestern Yunnan Province

Yangla copper mine, located in the Jinshajiang tectonic belt, is a large copper deposit in northwestern part of Yunnan province. A lot of studies have been carried our due to its great economic value and particular tectonic background, however, there are still major disagreements on genetic type and prospecting direction. Based on the study of regional geological background of the study area,the ore deposit geological features and metallogenic mode,geophysical and geochemical characteristics, geological ore controlling factors, the authors found that ore bodies of Yangla copper deposite are trinity controlled by stratum, structure, and magmatic rock obviously. The Yangla copper mine is a typical multiple-genesis deposit, which experienced Hercynian exhalative sedimentary related to submarine volcanic eruption, Indosinian and Yanshanian magmatic hydrothermal metasomatism and superposition forming the contact metasomatism ore body, and Himalayan tectonic hydrothermal metasomatism-filling mineralization leading to ore body enrichment. According to the results of the above research, the authors put forward the prospecting direction, to provide reference for the prospecting work in this area.