四川石棉西部地区建造构造类型及其与成矿作用的关系

Formation Structural Types and Its Relation with Mineralization in Western Shimian,Sichuan Province

四川石棉西部地区位于羌塘-三江造山系(V)与扬子陆块(Ⅷ)两大一级构造单元结合部位,复杂和多样的地质构造,独特的演化历史和多其次强烈的构造一岩浆活动造就该区了十分有利的成矿地质环境,是重要的有色一稀贵金属成矿区。本文通过在区内开展矿产地质调查工作,共厘定出2类沉积建造、3类火山岩建造、8类变质岩建造以及8类侵入岩建造,同时在前人工作基础上,以已有成矿事实为依据,结合实际工作调查及后期综合归纳研究,共划分出7个与成矿密切的建造+构造特征组合类型。提出了并以碳酸盐岩建造+花岗质侵入建造+深大断裂附近的次级韧-脆性构造三位一体的综合找矿模式,为区内的找矿工作提供了一定的指导、借鉴,有效指导和推进了区内矿产勘查工作的开展。

The western Shimian is located in the junction of two major first order tectonic units in the Qiangtang-Sanjiang orogenic beh （ V ） and the Yangtze block （Ⅷ）, complex and muhiple geologic structure, special evolution histoxT and times strong teetonie-magmatic activity formed a favorable mineral environment, it＇ s an important nor-ferrous and rare metal mineralization area. In this paper, by geology and mineral survey in this area, 2 sedimentary formation, 3 volcanic rock formation, 8 matamorphierock formation and 8 intrusive rock formation are determined. Meanwhile, on the base of former work, according to the known resuhs, by actual investigation and later reaeareh, 7 formation＋strueture compositions which has close relation with mineralization are divided. The comprehensible prospecting model of carbonate rock formation＋granite formation＋ secondary ductile-brittle structure accompanied with the deep fracture are carried out, it will provide some guide and reference for the exploration in this area and will guide and promote the mineral exploration in this area effectively.