摘要
本文通过对绢云母39Ar－40Ar坪年龄的研究，得到二道沟金矿床的成矿年龄为140±2．8Ma；从年代学方面证实了金矿化与对面沟花岗闪长岩无直接关系，而与火山岩和次火山岩有密切的关系；该矿床是－岩浆热液为主要来源而混入有一部分大气降水的浅成低温热液型金矿床。
The age of sericite determined by the 39Ar/40Ar method suggests that the depositional age of the Erdaogou gold deposit in Liaoning Province is of 140±2. 8Ma, geochronologically confirming that gold mineralization occurred at the late stage of volcanic activity and predated the Duimiangou granodiorite. It is indicated that gold mineralization has nothing to do with the Duimiangou granodiorite, but is closely related with the rhyolitic volcanic and subvolcanic rocks. The deposit is an epithermal gold deposit hosted in volcanic rocks, whose ore-forming fluid was mainly derived from magmatic water mixed with meteoric water.
出处
《矿物学报》
CAS
CSCD
北大核心
1997年第4期442-447,共6页
Acta Mineralogica Sinica
基金
国家攀登计划A30资助
