湖北白云金矿床成矿物质来源探讨

白云金矿床是湖北省大别山区目前最大的岩金矿床,其探明储量已达中型规模。对于该矿的成矿物质来源,有岩浆热液、混合岩化热液等不同认识。本文通过对赋矿地层、含金石英脉常量元素、微量元素、稀土元素以及同位素和矿物包裹体地球化学特征的研究,对白云金矿床成矿物质来源作了探讨。研究结果表明:金主要来自下元古界大别群,成矿溶液以区域变质水为主,并有同生水的混入。

RESEARCH ON M INEROGENIC SUBSTANCE SOURCE OF GOLD DEPOSIT FROM BAI YUN,HUBEI

The gold deposit form Baiyun is the biggest rock gold deposit within Tongbai-Dabie area of Hubei Province at present,of which the demonstrate reserves is up to a moderation on scale.As for the minerogenic substances, there are such different source ideas as magmatic hydrothermal solution, migmatitic (migmatized) hydrothermal solution,etc.Based on the geoch- emical characteristics of ore-occurring strata,major elements within the gold-bearing quartz vein,minor elements,rare earth elements,isotopes and mineral inclusions,the authors have researched into the minerogenic substance source of the gold deposit,and indicate that the gold mainly derives from Dabie Group of Lower Proterozoic Erathem and the minerogenic solution is dominant of regional metamorphic water combined with syngenetic water.