二密铜矿床成矿模式的研究

二密中生代火山岩盆地矿产以铜为主,矿床主要产于盆地中石英闪长岩岩体东段,矿体分布在石英闪长岩内外接触带,均以脉状、细脉状、细脉浸染状、浸染状矿体为主,成群成带分布.从岩体和矿脉原生硫化物同位素测定.显示成矿热液与花岗斑岩、石英闪长岩是统一的硫源.其成矿与岩体侵入作用有关.在研究铜矿床地质特征的基础上,总结了二密铜矿床成矿模式.

RESEARCH ON THE METALLOGENIC MODEL OF ERMI COPPER DEPOSIT

Copper is the principal ore deposit formed in Ermi Mesozoic volcanic basin. The deposits are mainly located in the east of the quartz diorite rock body in the basin. The ore body distributes as zones and belts over the inner and outer contact zones with the structure of vein type, veinlet type,veinlet-disseminated type and disseminated type of the ore body. According to the isotope determination data of the primary sulfide from the vein.it is suggested that the sulfur source is similar to granite porhyry and quartz diorite. The mineralization is related to the intrusion of rock body. The metallogenic model was proposed on the basis of the study of geological feature of the deposit.