桂西北发现一类新的微细浸染型金矿

A new type of fine disseminated gold deposits found in Northwest Guangxi,China

桂西北是著名的滇黔桂金三角区之一部分，分布有金牙、高龙、明山等中－大型微细浸染型金矿床。近年来，该区又发现了一类新的微细浸染型金矿床——即产于辉绿岩与地层内外接触带中的金矿床。通过对该类矿床的典型代表世加金矿进行地质地球化学的初步研究，认为该类矿床为典型的浅成低温热液矿床，与区内产于中三叠统地层中典型的微细浸染型金矿床在成因上有内在的联系。

Northwest Guangxi,where distributed several largemiddle sized gold deposits of fine disseminated type,such as Jinya,Gaolong,Mingshan etc.,is a part of the famous“GoldTriangle”in the border area between Yunnan,Guizhou and Guangxi.A nwe type of fine disseminated gold deposits which occur in the inner and outer contacts between the gabro and the strata have also been found in Northwest Guangxi in recent years.In this paper,the initial geological and geochemical studies of Shijia deposit are made.It is considered that these deposits are typical supergene lowtemperature hydrothermal deposits which has internal and external relations in genesis with the typical fine disseminated gold deposit which occurred in middle triassic system strata in the area.