摘要
摘要紫金山地区Cu、Au、Mo等成矿元素的迁移、富集与火山(次火山)机构及断裂构造关系密切。四坊岩体(燕山晚期)及其派生的小岩体为本区铜矿化提供了重要的物质来源。As、Sn、Ag、Bi、cr、Cu可作为铜矿体的矿上晕指示元素,Mo、Ni、Zn可作为铜矿体的矿下晕指示元素,Au亦可作为铜矿体的上部指示元素之一。元素含量比值K=(1+logAs+logSn+logBi)/logCu(1+logMo+logZn)可用来大致判断铜矿体的相对位置;当K>0.45时为矿上,K<0.37为矿下。NW向断层F_(2-10)及NE向断层F_(1-4)、F_(1-5)是本区重要的控矿构造,对其进一步研究具有重大的找矿意义。
This paper reports on the geochemical characteristics of the microelements from the Zijinshanarea of Fujian Province and their significance in search for minerals. The migrationand enrichment of Such metallogenic elements as Cu, Au and Mo in the Zijinshan area have aclose relation with the volcanic(sub-volcanic) apparatus and fault structures. The Sifangmassif(late Yanshanian)and its derived massifs are the important material sources of coppermineralization in the area. The elements of As, Sn, Ag, Bi, Cr and Cu can be used as theindicator elements that show the superore halo of the copper orebody, so can the element ofAu be. And the elements of Mo, Ni and Zn can be used as the indicator elements that Showthe subore halo of the copper orebody. The k ratio of the element contents [k=(1+logAs+logSn+logBi/logCu×(1+logMo+logZn)]in the copper orebody can be used to approximatelylocate the relative position of the copper orebody. When K>0. 45, it indicates that itis the upper part of the copper orebody;and when k<0. 37, it is the lower part of the copperorebody. The major ore-control structures in the area are the NW fault F_(2-10) and the NEfault F_(1—4) and F_(1—5), which are of great importance to finding the copper ores in the area.
出处
《福建地质》
1992年第2期80-89,共10页
Geology of Fujian
