三江北段地球化学特征研究  

GEOCHEMICAL CHARACTERISTICS OF THE NORTHERN PART OF SANJIANG (JINSHAJIANG-LANCANGJIANG-NUJIANG) REGION

作　　者：徐善法[1] 袁志亮[2] 陈建平[2] 

机构地区：[1]中国地质科学院应用地球化学重点开放实验室 [2]中国地质大学

出　　处：《物探与化探》2007年第2期99-105,共7页Geophysical and Geochemical Exploration

摘　　要：根据“三江”地区北段1∶20万区域地球化学勘查资料,结合区域地质背景,对该区元古宇至新生界地层和不同岩体的地球化学特征进行了较为全面的分析。本区主要成矿元素为As、Au、Cd、Hg、Ni、Sb、Ag、Cr、Pb、Sn、W、Zn、Cu;岩体中的Ag、Pb、Sn、Cd、Zn主要与中基性火山活动有关,而Cu、Mo、Bi、Au的成矿作用主要与中酸性岩浆活动关系密切;在新生代地层中Cu含量比岩体中的高,Au含量在中生代岩体中远远大于其他时代的岩体,因而这些地层和岩体最有可能成为矿质来源。Based on 1 ： 200 000 regional geochemical exploration data obtained from the northern part of the Sanjiang region in combination with regional geochemical background, this paper has analyzed fairly in detail geochemical characteristics of various ages of strata and intrusive bodies. The metallogenic elements in this region are mainly As, Au, Cd, Hg, Ni, Sb, Ag, Cr, Pb, Sn, W,Zn and Cu. Such elements as Ag,Pb,Sn,Cd and Zn in the intrusive bodies are chiefly related to intermediate-basic volcanic activities ,while the ore-forming actions of Cu, Mo, Bi and Au have close relationship with intermediate-acid magmatic activities. Cenozoic strata contain higher Cu than intrusive bodies of that age, and Mesozoic intrusive bodies contain much more Au than intrusive bodies of other epochs. These strata and intrusive bodies are therefore most likely to act as sources of ore materials.

关 键 词：三江北段 区域地球化学 地球化学特征 

分 类 号：P632[天文地球—地质矿产勘探]