新疆乌恰县萨热克铜矿床沉积微相与储矿相体结构特征

发布时间：2018-05-19 19:53

本文选题：砂砾岩型铜矿 + 微相类型　；参考：《矿物学报》2017年05期

【摘要】：通过对萨热克铜矿床典型勘探线和坑道构造岩相学填图及相体解剖工作,对其沉积相类型、储矿相体结构、成矿作用等进行了研究,认为本区沉积相类型主要为山麓冲积扇相、旱地扇扇中亚相、湿地扇扇中亚相、湖泊沼泽相、滨湖相、浅湖半浅湖相、辫状河三角洲前缘亚相等。上侏罗统库孜贡苏组形成以旱地扇±残余山间湖泊相(尾闾湖)湿地扇的叠加复合扇扇中亚相(库孜贡苏组上段),叠加复合扇扇中亚相紫红色和灰黑色铁质杂砾岩类为萨热克铜矿床的储矿相体,其微相类型分为水道微相、席状片流微相、叠加复合扇微相、冲刷面微相、筛积微相和泥石流微相。切层断裂层间滑动构造形成的碎裂岩化及后期沥青类盆地流体叠加改造部位,矿体具有明显富集作用,显示构造岩性岩相多重耦合特征。
[Abstract]:Based on the petrographic mapping and facies anatomy of typical exploration lines and tunnel structures of the Sajek copper deposit, the sedimentary facies types, ore-storage facies structure and metallogeny are studied. It is considered that the sedimentary facies types in this area are mainly foothills alluvial fan facies. The central facies of dryland fan, wetland fan, lake swamp facies, littoral lake facies, shallow lake half shallow lake facies and braided river delta front facies are subequal. The upper Jurassic Kuzigongsu formation formed the subfacies of the superimposed composite fan (upper member of Kuzigongsu formation) with dry land fan 卤residual intermountain lacustrine (tail lake) wetland fan (upper member of Kuzigongsu formation, superimposed fan central facies purplish red and gray-black ironaceous miscellaneous gravel). The rocks are the reservoir facies of the Sajek copper deposit. The microfacies are divided into watercourse microfacies, sheet flow microfacies, superimposed composite fan microfacies, scour surface microfacies, sieve microfacies and debris flow microfacies. The clastic lithology formed by interlayer sliding structure of shear fault and the superposition of fluid in the late bitumen basin, the orebody has obvious enrichment, which shows that the tectonic lithology and lithofacies are multiple coupled.
【作者单位】：有色金属矿产地质调查中心;昆明理工大学国土资源工程学院;
【基金】：国土资源部行业公益性科研专项(201511016-1) 中国地质调查局公益性项目(12120114081501)
【分类号】：P618.41

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