Research On The Petrologic Characteristics Of Ore-bearing Rock Series In Wajingou-Boxianglin Ore Section, Liwu Cu-Zn Mining Area, Jiulong, Sichuan

Wajingou-Boxianglin located in the west of Kangdian Earth's axis, the south edge of Songpan-Granze orogen and the northwest of Muli-Jinping arc thrust tectonic zone.Ore-bearing rock series which refer to Liwu group in Wajingou-Boxianglin in this paper, contained schist, quartz schist, quartzite and amphibolites in this research. Ore minerals including chalcopyrite,pyrite,sphalerite,pyrite,etc.;Gangue minerals including quartz,mica,feldspar,etc..Diagnostic including staurolite, garnet, tourmaline, etc..Biotite schist and two-mica schist are the most in Schist of the ore-bearing rock series,sericite-schist ,biotite and sericite-schist are the second.Tremolite schist and chlorite schist are the least.Schist belong to parablastesis.The main protolith are mud rock,siltite and claystone,ect..The main rock of quartz schist is two-mica quartz shist,biotite quartz schist is the second,muscovite quartz schist is a small amount. Quartz schist belong to parablastesis. The main protolith is claystone ,schist that belong to allitic series.Some of them transite to felsic series.The main rock of quartz rock is biotite quartz rock and two-mica quartz rock, and belong to parablastesis. The main protolith siltstone. Amphibolites belong to orthometamorphite.The possible protolith is basalt.Beneficiation and decrement of elment respond the characteristic of mantle source and shell source in Schist, quartz schist and quartz rock from characteristic of trace element of ore-bearing rock series.That prove those rocks are parablastesis.The protolith of amphibolites is basic rock.Some other characteristic also indicate it is basalt. Distribution pattern of rare-earth element of schist, quartz schist and quartz rock are matched comparatively.All of them are beneficiation of LREE and obvious negative Eu abnormality.The characteristic indicate the similar source. Amphibolites also are beneficiation of LREE. The characteristic indicate it is tholeiite.Integrated view,the ore-bearing rock series of Wajingou-Boxianglin is marine deposit construct and belong to littoral-sallow sea depositional environment.The process of formation of ore-bearing rock series is the same process as preliminary beneficiation of mineral...