山东国土资源2017，Vol.33Issue(2)：1-7,7.
胶东焦家金矿床基性脉岩地球化学特征及其与金矿化的关系
Relation between Geochemical Characteristics and Gold Mineralization of Mafic Vein Rocks of Jiaojia Gold Deposit in Jiaodong Area
摘要
Abstract
There are 2 periods of mafic vein rocks before and after mineralization were discovered in Jiaojia gold deposit through field observation.In order to constrain petrogenesis and relation with gold mineralization,geochronology,major element,trace element and S isotope of mafic vein rocks have been studied.Mafic vein rocks include lamprophyre and sillite in Jiaojia gold deposit.And their respective content of SO2 is 47.96% and 44.20%~45.34%,and Na2O+K2O is 4.075% and 6.407%~6.45%,which is belong to tephrite,trachy-basalt and basalt.The content of TiO2 is1.31%~2.40%,and Ti/Y is 331~913.The mafic vein rocks are characterized by enrichment in LREE and LILE.δ34S is 1.0×10-3~2.8×10-3 in prite.It is showed that Lamprophyre and sillite before mineralization have the characteristics of high Ti lamprophyres,while lamprophyre after mineralization is low in Ti.The magma originated from partial melting of asthenosphere mantle in spinel-granet transferring zones.Jiaojia gold deposit was formed in transformation process of high Ti and low Ti lamprophyre magma source.关键词
基性脉岩/地球化学/岩石成因/焦家金矿床Key words
Mafic vein rock/geochemistry/petrogenesis/Jiaojia gold deposit分类
天文与地球科学引用本文复制引用
宋英昕,孙伟清,马晓东,丁文洁,郭广军,孙雨沁,程伟,李敏..胶东焦家金矿床基性脉岩地球化学特征及其与金矿化的关系[J].山东国土资源,2017,33(2):1-7,7.基金项目
山东省2011年度地质勘查项目"山东胶东金矿与深源脉岩关系研究"(编号鲁勘字[2011]56号) （编号鲁勘字[2011]56号）
