Ore-forming Geological Conditions Analysis And Its Appraisement Of Gold Deposits In Southern Songxian

Based on the systematically stated of Ore-forming geological base such as layer-construction,tectonic property,magmaism and geological characteristics of typical gold d eposits in Xongershan-Waifangshan area,The paper summerised Ore-forming geological properties of goiddeposits, analysised Ore-forming controing act and conditions of gold deposits in southern of Songxian,further more the future-pictuer had been appraisement ed.Detailed analysis of Ore-forming and Ore-controlling factors of gold deposits in t his area,Result that in the region Ore-forming and Spreading inthe space of gold dep osits not only closly relate with volcanic process in the Xonger Age and magmatic pr ocess in the YANSHAN Age,but also with the evolution of MACHAOYING fault. Th e NWW and NE regional deep faults controlingnot only the forming and spreading of volcanic-basin and volcanics,but also the occurrence,developing and spreading of magm atic process in the YANSHAN Age,and thus controling the spreading of regional gold-abnormal or gold deposits(points). Ore-forming and Spreading of gold deposits is unite -controlled by Xonger Blok volcanic-tectonic and metmorpic belt in fault beside it,usua lly as ring-belt distributed outside around with it.As a result of controled by diffence from it position in fault and ore-forming process,the gold deposits can be devided into three types:metamorphic tectonite, explosion breccia and quartz vein. What is more,th e former spreading wide, magnitude huge. The attitude and spreading in the space of ore-body controlled by array from which stressproess occus,and that harmonize with R iedel experiment law,stand this the ore-forming model by tectonic of gold deposit is s etup, dpend on this a law of ore-body spreading is determinated. Where the matterco mes from and how did the physical-chemical environment was has been discussedsimp ly.Stand by analysis of sulfur,lead and hydrogen-oxigen isotop information,mainly it is comes from upper mantle,partly from crust, the formingand moving of the Au-bearing liquid generaly in acid,but in alkali at middle-latter stage, and it temperature about 10 1.2-318.6℃, at aevrage 232℃, belongs middle-lower temperature environment.It is th e creation that ore-forming of gold of hot fluidal process from tectonic-magmatism in long time,more period and more stage,it has properties of stromatolithic more times,and ended at YANSHAN Age.Based on Ore-forming geological conditions analysis of layer-construction,geotecton ic properties and its geochemical information,compared with thewellknown area of gold deposit,the author point out that the studed-area have upper ore-forming geological con ditions and large prospective for prospecting, the area where has geochemical informati on and outside the eastern and southeastern of circumtectonic line are the key target districts in deeply ore-prospecting.