论文部分内容阅读
Fluidization during collisional orogenesis is yet to be studied thoroughly. Through theoretical deduction, a three-stage fluidization model is advanced for collision orogenesis and A-subduction. The ore-forming fluid should be dominated by upward deep-secreted fluid in the early compression stage of a collision process, the mixed fluid by deep-secreted and shallow-derived ones in the middle compression-to-extension transition stage, and the downward shallow-derived fluid (mainly from meteoric water) in the late extension stage. The oxygen and hydrogen isotopic analyses and the thermometric data of ore-forming fluids for syn-collision gold deposits in eastern Qinling Mojntains, where there occurred typical collision orogenesis in Mesozoic, clearly demonstrate a three-stage evolution agreeing exactly with the theoretical model.
Fluidization during collisional orogenesis is yet to be learned thoroughly. Through theoretical deduction, a three-stage fluidization model is advanced for collision orogenesis and A-subduction. The ore-forming fluid should be dominated by upward deep-secreted fluid in the early compression stage of a collision process, the mixed fluid by deep-secreted and shallow-derived ones in the middle compression-to-extension transition stage, and the downward shallow-derived fluid (mainly from meteoric water) in the late extension stage. The oxygen and hydrogen isotopic analyzes and the thermometric data of ore-forming fluids for syn-collision gold deposits in eastern Qinling Mojntains, where there are typical collision orogenesis in Mesozoic, clearly demonstrated a three-stage evolution agreeing exactly with the theoretical model.