广东银岩-东田矿田锡-金成矿系列的研究

On Study of Tin and Gold Metallogenetic Series of Yinyan-Dongtian Ore Deposits,Guangdong Province

银岩—东田是粤西地区锡矿与金矿的集中产区.本文对该区锡矿和金矿产出的地质位置及其与构造,岩体的时、空关系进行了系统的研究.发现锡、金是岩浆分异演化和多期多阶段成岩成矿的产物,是温度、压力及其物化条件改变状况下的结果.较早产出锡和钨钼铋组合.较晚为金银矿组合,它们构成一个成矿系列.

Yinyan-Dongtian orefield is a concentration area of tin and gold depo-sits in western part of Guangdong province,of which yinyan is a large tin dep-csiots,Dongtian is a medium-large gold deposits.In the past,tin and gold usedto be consiclered as two great different elements in geochemical characteristics.But through our research work,it is found that they actually are very closelyrelated in Pb.H.O.and S isotope,REE distribution pattern,inclusion,compositiondensity,acidity--alkalinity,temperature etc.In spatial distribution,yinyan granite--porphyry rock body as a center,around which the different mineralization anddifferent ore deposits distributed regularly,Tin and gold are the products ofmagmatie differentiation and polyperio(?)-polystage lithogenesis and metallogenesis.Sn,W,Mo,Bi association are the early products,whereas the Au,Ag arethe late products,which constitute a metallogenetic series.