摘要
滇黔桂卡林型金矿是产于热水沉积岩及碎屑岩系的热液矿床，载金矿物为黄铁矿、毒砂等热液矿物，而石英、碳酸盐、萤石及粘土等矿物则是主要的热液蚀变矿物。矿化产于蒙脱石、高岭石粘土到伊利石、绿泥石粘土矿物的转变带，成矿深度在2000m以上，成矿热液来源于粘土矿物脱水产生的异常高压流体或沿断裂带天水循环形成的成矿流体。这种流体形成的热液矿物稀土元素分配显示中稀土富集的分配模式，并明显富元素钇，这种流体中形成的黄铁矿中Co／Ni值显示沉积到热液成因的过渡类型，因此与砂岩铜矿中热液矿物的稀土分布模式有某些一致性。
The Carlin-type gold deposits in the Yunnan-Guizhou and Guangxi area are hydrothermal deposits hosted in hot water and clastic sedimentary rocks. The main gold-bearing minerals are pyrite and arsenomarcasite. Quartz, calcite, clay,etc. are hydrothermally altered minerals.Gold mineralization occurred in the inversion zone from montmorillonite,kaolinite to illite and chlorite at the 2000-meter depth' Ore-forming solution was derived from high-pressure fluid generated from the dehydration of clay minerals (montmorillonite, kaolinite to illite and chlorite),and formed metallogenetic fluid derived from meteoric water cycling in strata along the fault system from which hydrothermal minerals are rich in MREE, showing some analogies to hydrothermal minerals in sediment-hosted copper deposits.
出处
《矿物学报》
CAS
CSCD
北大核心
1997年第4期478-482,共5页
Acta Mineralogica Sinica
基金
中国科学院矿床地球化学开放研究实验室资助
关键词
金矿床
热液矿物
地球化学
Carlin-type gold deposit
hydrothermal mineral
rare-earth elements (REE)
