夏塞银多金属矿银铅锌矿体特征及赋存规律研究

Characteristics and the occurrence regularity study of Ag-Pb-Zn orebody of Xiasai silver polymetallic deposit

夏塞银铅锌多金属矿床产于义敦古岛弧碰撞造山带中段,章德背斜轴部偏西翼,格聂花岗岩带中段、绒伊措岩体的北侧2～4 km处,通过对矿体特征、地球化学特征以及其它控矿因素等方面的分析,认为本矿区银铅锌矿体主要赋存于上三叠统图姆沟组变质砂岩、板岩中的北北西向构造破碎带中,矿体产出严格受断裂和裂隙构造控制,是典型的受断裂破碎带控制的岩浆期后中低温热液矿床,现已圈定11条银铅锌矿体,其中APZ-①、APZ-②为主矿体。本文进一步探讨夏塞银铅锌矿体的成矿规律,为矿山的深部和外围探矿做准备。

Xiasai Ag-Pb-Zn polymetallic deposit occurs in the middle of Yidun ancient island arc collision orogenic belt,the west wing of Zhangde anticline axis,the middle of Genie granite and 2-4 km north of Rongyicuo rock.Through the analysis of the orebody characteristics,geochemical features and other ore-control factors,it is considered that this orebody occurs in NNW structure fracture zone of Upper Triassic Tumugou formation metamorphic sandstone and slate.The orebody is strictly controlled by faults and fractures. It is a typical postmagmatic mesothermal-epithermal temperature deposit which is controlled by fractured zone.11 Ag-Pb-Zn orebody were outlined and the main orebody were APZ-①and APZ-②.In this paper,the metallogenic regularity of Xiasai Ag-Pb-Zn orebody was further discussed and it can be used in the deep and peripheral prospecting.