胶莱盆地含矿系与金矿关系初探  

PRELIMIN ARY STUDY ON RELATIONSHIP BETWEEN THE ORE - BEARING SYSTEM AND GOLD DEPOSIT IN JIAO - LAI BASIN

作　　者：陈世桢[1] 张竹如[1] 

机构地区：[1]贵州工业大学资源系

出　　处：《地质科学》1997年第2期193-200,共8页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家攀登项目

摘　　要：在胶莱盆地内，由富Ａｕ和富Ｃ有机的岩石组成的含矿系中发现金矿床。含矿系属下白垩统莱阳群底部，与胶莱盆地第１生油层同层位。金矿呈层状、似层状产于含矿系层间破碎带中。金属矿物组合：金银矿物一闪锌矿一方铅矿一赤铁矿一黄铁矿一磁铁矿一黄铜矿；成矿元素为Ａｕ一Ａｇ－Ｚｎ－Ｐｂ－Ｃｕ－Ｆｅ。矿石中流体包裹体成分主要是ＨＯ．ＧＯ２、ＣＨ４、ＣＨ６、ＣＨ８、ＣＨ＝ＣＨ２：Ｓ及Ｎ。矿床的形成经历了矿源层形成一成岩改造一油油气运移富集一油田卤水改造的低温改造过程。胶莱盆地特殊的形成和演化条件使该类型层控金矿床具较大的找矿前景。The gold deposits were. discoveed in ore-bairing systim of Jiao-Lai bash. The ore-bearing systim is corapood of gold-rich.rock and organic, carbon-rich rock. The ore -bearing system is developed at thc bo0on of Cretaceous Laiyang group , the same bed as the first oil-geaendng stmtum ofthe basin. The ore-tcaring systam is disvibuted in northeast and southwot of the basin.The average gold contentis174.86mg/g of 171 sunples in the region. The ore-bearing systxn coatdn high Au, Ag, Pb, Zn, Cu, Fe. The oontmts of Au, Ag, Pb, Zn have dimct propordon rdadon with organic carbon and suJfur in the ore-bearing systim. The gold deposits. are formed ia beded and qua- si-bdedintalayerfhactured zone ofthe ore-bearing system Theasxmblageofore-form-. iag elements is Au-Ag-Zn-Pb-Cu-Fe. The assemblage of metaUic minenl is goldargemtid- sphalaite-galena -hemadte-phdte-magnedte- chalcopldte. The essential compositins offluid inclusion are HO, CO, CH, CH, CH, CH=CH, S and N. The processes of the deposit fornation are: fonnation of source led-diagenetic reformation - gas and oil. formation transposition and concentration- oilfield brine rdonaadon. That is a lower tampemture ore - reforming stntabound deposit. The Jiao-Lai basin was formed in lower Cretaceous as a fault basin.Duringtheinidalmo- tion preiod of the basin , it was only a local water body in Mupin-Ldyang and Wulian -Zhucheag areas Then the gold-rich soume rock of old Land supplied the basin with

关 键 词：胶莱盆地 白垩系 莱阳群 金矿床 含矿系 生油层 

分 类 号：P618.510.2[天文地球—矿床学] P618.130.2[天文地球—地质学]