Researches On Tectono-Metallogenesis And Metallogenic Prognosis In Shuangwang Gold Deposit, Shaanxi Province, China

Guided by plate tectonic theory and combined with the analysis of the metallogenetic geotectonic setting, geological and geochemistry characteristics, genesis and brecciation mechanism in Shuangwang gold deposits in China,this paper established location model of ore-fluidic fracture.According to the metallogenetic model and the signs of geology, geophysics, geochemistry,this paper prognosed some hidden ore bodies in the sides,deep and periphery around the known ore-bodies. The main research findings and original views achieved in this paper are as follows:1 .Through the study on the macroscopical characterisics of breccia belt in Shuangwang gold deposit, this paper has put forward a new view that the breccia belt is a incipient fault, i.e. concentration of stress in albitite by approximately transmeridional shearing during epiorogenic fold inversion.2.0n the basis of observing and describing of the characteristics of breccia, the author has pointed out a view that ore-fluidic fracturing drived the growth of micro-cranny of incipient fault by positive feedback, brought mineralizing matter and controled the forming of gold deposit by multiple ore-fluidic fracture.3.According to the characteristics of crystal structure,electronic structure and surface structure of gold,pyrite and quartz,this paper has disserted gold in pyrite and quartz(silicon-dioxide) primarily connects with their crystal structure, electronic structure and surface structure.The 18-electron regulation about the assorting material were used to interpret the mechanism of gold bearing pyrite and quartz. The growth of incipient fault and ore-fluidic fracturing promoted gold enrichment in pyrite and quartz were point out,i.e. micro-cranny in pyrite,ankerite and quartz formed by incipient fault and ore-fluidic fracturing conduced to plenty of defect in mineral surface during crystal growth,enlarged the area of gold contacting with mineral surface, prolonged and extended the deposition of gold,lastly,posed rich gold ore-bodies.4.Starting with analyse the characteristics of Wangjialeng sedimentary sub-basin,the auther has acquired the view that the...