首页> 中文期刊> 《物探与化探》 >福建省紫金山铜金矿床原生晕地球化学特征及深部找矿前景

福建省紫金山铜金矿床原生晕地球化学特征及深部找矿前景

         

摘要

通过系统采集紫金山铜金矿床4~11线共41个钻孔的岩矿样,绘制原生晕剖面图,建立垂向元素分带序列、矿体剥蚀程度准则,结合深部指示元素的特征,进行隐伏矿预测。该矿床金矿近矿晕为Au-Ag-Zn1,尾部晕为Bi-Ga-Mo-Sn-Ti-Co-Ni-W1-V;铜矿前缘晕为Hg-Sb-As,近矿晕为Cu-Pb1-Zn2,尾部晕为Be-W2。矿体剥蚀程度评价表明,高硫型铜矿体往深部已尖灭。深部F-Mn-Pb2-Zn3的异常形态和元素组合符合典型斑岩矿床的外带特征,斑岩体延伸至矿床周边;深部的蚀变矿物组合、金属矿物组合、流体包裹体特征等均表明深部可能存在斑岩铜(钼)矿床。%Based on systematic collection of rock and ore samples from 41 drill holes along No. 4 and No.11 exploration lines in the Zi-jinshan copper-gold deposit of Fujian Province,the authors drew a contour map of primary halos,established vertical element zoning se-quence and orebody denudation guidelines and, in combination with characteristics of the indicator elements in the depth,made a pre-diction of concealed orebodies. For gold orebody, the near-halo is Au-Ag-Zn1 , and the rear halo is Bi-Ga-Mo-Sn-Ti-Co-Ni-W1-V, whereas for copper orebody, the front halo is Hg-Sb-As, the near halo is Cu-Pb1-Zn2 , and the rear halo is Be-W2. The evaluation of the denudation of the orebody shows that the high-sulfur copper orebody pinches out to the depth. The abnormal morphology and ele-mental composition of F-Mn-Pb2-Zn3 in the depth is consistent with the characteristics of a typical porphyry deposit, the porphyry body extends to the periphery of the deposit, and the deep alteration mineral assemblages, metal mineral assemblages, fluid inclusion char-acteristics show that there may exist a porphyry Cu ( Mo) deposit in the depth of the southwest part.

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