地质与资源2019，Vol.28Issue(5)：413-422,10.
黑龙江十五里桥金矿龙江组火山岩地球化学特征及构造背景分析
GEOCHEMISTRY AND TECTONIC SETTING OF THE VOLCANIG ROCKS OF LONGJIANG FORMATION IN SHIWULIQIAO GOLD DEPOSIT,HEILONGJIANG PROVINCE
摘要
Abstract
Study on the lithological association and geochemistry of Longjiang Formation in Shiwuliqiao gold deposit shows that the contents of SiO2,Al2O3 and K2O in the volcanic rocks are 53.56α-73.43α,14.90α-18.74α and 1.76α-4.20α respectively,belonging to high‐K calc alkaline series. The REE distribution patterns show distinct fractionation of LREEs and HREEs,with weak negative or no Eu anomaly. The trace elements are characterized by enrichment of LILEs(Rb,K,Sr and Ba),and depletion of HFSEs(Nb,Ta and Ti),with the Rb/Sr ratio of 0.04-0.43 and Ti/y ratio of 144.23-492.19. The samples fall in the volcanic arc,continental arc and post‐collision arc setting zones in the tectonic discrimination diagram,indicating the Longjiang Formation was the product of partial melting of lower crust in the transition of plate subduction and collision orogeny.关键词
龙江组/地球化学/构造背景/十五里桥金矿/黑龙江省Key words
Longjiang Formation/geochemistry/tectonic setting/Shiwuliqiao gold deposit/Heilongjiang Province分类
天文与地球科学引用本文复制引用
陈卓,李向文,张胜江,周传芳,李蕴峰,国林..黑龙江十五里桥金矿龙江组火山岩地球化学特征及构造背景分析[J].地质与资源,2019,28(5):413-422,10.基金项目
中国地质调查局"十五里桥等9幅1:5万区域地质矿产调查"项目(编号12120115041801). （编号12120115041801）
