摘要
本矿床原系一古矿山,70年代中期重新进行勘探,其形成机理的主要观点有二:其一,认为矿床系岩浆热液充填交代而成,成矿受构造控制;其二,认为矿床具层控性质,成矿物质来自围岩。几年来,作者对矿床进行了初步的研究,提出以下意见,供参考。
The deposit under discussion lies in a particular stratigraphic horizon of a low-grade metamorphic volcanic-sedimentary sequence.The ore bodies occur in the stratoid and lenticular forms,and are controlled strictly by the strata.There are several factors controlling ore formation,but the leading ones are the ore source and the strata.The primary source of gold and silver is submarine volcanoes.Deposition of the ore material provided by volcanoes gave rise to a set of ore source beds enriched in gold,silver and other metals.Although the strata control the position and form of the ore bodies,the sites with the most important cencentrations of metals are governed by structures.Ore-forming processes are complicated.After the ore material derived from volcanic activity got into sedimentary strata,ore source beds were formed;however,only after it underwent regional metamorphism,can the deposit be formed,because the derivative hydrothermal solutions promoted the mobilization,migration and concentration of the metals in the ore source beds,and caused them to be redeposited under favourable physicochemical environments and appropriate geological conditions.This is a quite characteristic stratabound gold-silver deposit which was formed by metamorphic-hydrothermal activity and whose ore material originated from host rocks.
作者
郑明华
张斌
帅德权
Zheng Minghua;Zhang Bing;Sui Dequan(Chengdu Geological College)
出处
《地质学报》
1981年第1期55-66,共12页
Acta Geologica Sinica
