江西弋阳铁砂街中元古代海底火山喷流成矿作用

Middle Proterozoic submarine volcanic exhalative metallogenesis of Tieshajie,Yiyang,Jiangxi Province

江西弋阳铁砂街铜矿产于中元古代晚期海相火山岩中,矿床在大地构造环境、含矿地层建造、矿体形态、喷流岩组合、喷流岩主量—微量—稀土元素地球化学、同位素地球化学方面都具有海底火山喷流沉积的典型特征,是扬子板块、华夏板块边缘中元古代裂谷海底火山喷流沉积作用的产物。

Tieshajie copper deposit, Yiyang, northeast Jiangxi Province, is occurred in the late Middle Proterozoic marine facies volcanic rocks. The study on geotectonic setting,ore-bearing strata formation, configuration of ore bodies, assemblage of exhalites ,main element-trace element-REE geochemistry, isotopic information about source of ore-forming material and isotopic geochronology of the deposit indicates that the deposit has typical characteristics of submarine volcanic exhalative sedimentary deposits and is formed in the geotectonic environment of the Middle Proterozoic rift island arc at the south margin of the Yangtze plate and the north margin of the Cathavsia plate.