摘要
通过对皖南地区微细浸染型金矿矿物共生组合、载金矿物、包裹体、同位素等地球化学特征的研究,阐述了该区金矿载金矿物特征及成矿热液组成性质,并探讨了成矿的物理化学条件,指出本类型金矿成因上属于地下热卤水浸染型,初步总结出成矿模式。
The paper studies some impregnated gold deposits in southern Anhui Province.The geochemical characteristics which include paragenetic mineral,gold—bearing minerals,fluid inclusions and stable isotope are discussed in detail. Paragenetis minerals of the gold deposit are usually composed of pyrite,arsenopyrite,anti- monite,quartz,calcite and amounts of other minerals.The gold occurs in sulfides and thd great ma- jority of the gold is presented as ultramicro grains. The mineralization can be divided into two stages.Gold relates with pyrite and arsenopyrite in the early stage and with antimonite in the later stage. By means of various stages in the chief ore deposits,it is show that the metallogenetic temperature are commonly between 150—200℃ in the early stage and lower in later stage,but never leas than 84℃and the oreforming pressure of the deposits is about 160—250 bars respectively.
出处
《江苏地质》
1991年第3期137-143,共7页
Jiangsu Geology
