摘要
四川夏塞银铅锌多金属矿床位于西南"三江"义敦岛弧构造带中段,是与绒伊措岩体密切相关的浅成中低温热液型银铅锌矿床。对夏塞矿区1号矿体9个中段采样分析,通过数理统计分析、分带序列研究、地球化学参数计算、建立剥蚀模型等方法,系统详细地研究了矿体原生晕地球化学特征。研究表明:(1)1号矿体原生晕找矿的主要指示元素:Ag、Pb、Zn、Cu、Sb、Hg、Cd、Sn,次要指示元素:Bi、W、B、As、Au、Mn;(2)原生晕轴向分带序列为:Hg-Pb-Bi-Sn-Cd-Zn-Cu-As-Ag-W-Au-Sb-Ba-V-Mo-Mn,出现"反分带"现象;(3)成矿过程存在多次叠加,轴向地球化学参数变化曲折,出现多次转折,反应成矿过程复杂。综合各项特征,推测1号矿体深部可能有盲矿存在。
The Xiasai Ag-Pb-Zn polymetallic deposit, located in the middle of the Yidun island arc tectonic belt of ＂Sanjiang＂, southwestern Chi-na, is an epithermal deposit closely related with the Ptongyicuo rock mass. This paper systematically studies the geochemical features of the primary halos from 9 horizontal drifts of the No. 1 orebody with the methods of mathematical statistics, axial zoning sequence, geochemical parameters calculation and es- tablishment of the erosion model. The results show that the major indicator elements of prospecting with primary halos in the No. 1 orebody include Ag, Pb, Zn, Cu, Sb, Hg, Cd and Sn, and secondary indicator elements are Bi, W, B, As, Au and Mn. Axial zoning follows in a sequence of Hg - Pb - Bi - Sn - Cd - Zn - Cu - As - Ag - W - Au - Sb - Ba - V - Mo - Mn and it appears as anti - zoning phenomenon. The mineralization experienced several superposition processes, and axial geochemical parameters exhibited complicated changes and many turns, indicating its complexity. It is thus inferred that there are pos-sible blind orebodies in the deep portion of the No. 1 orebody.
出处
《地质与勘探》
CAS
CSCD
北大核心
2013年第2期236-249,共14页
Geology and Exploration
基金
四川夏塞银业有限责任公司<构造原生晕专项研究>项目资助
关键词
原生晕地球化学特征
轴向分带序列
夏塞银铅锌矿床
反分带
geochemical characteristics of primary halo, axial zoning sequence, Xiasai Ag - Pb - Zn polymetallic deposit, anti - zoning phenomenon
