| The Yin Changgou—Qi Luogou lead-zinc area located on west-south edge of Yangzi Paraplatform, belong to metallogenic subregions of Yangzi Paraplatform,is the important component of lead-zinc ores in Sichuan Yunnan and Guizhou.Qi Luogou lead-zinc area is subordinate to Qi Luogou village, Ningnan county, Sichuan. Ore area of 16 square kilometers. The exposed formation of ores area belong to sinian system cambrian system and small areas belong to presinian system.The Main containing ore formation is surface layer lighted on the sinian section (ec) group, the main component is dolomite.Ore type is dense block, brecciform veinlets and disseminated.Ore area located on west wing of Qi Luogou anticline, anticline in the near east,west,north and south,and growth faults in the area.Ore body main originate in NNW structure part which dip to NE.Base on basic structural geology by fully collecting previous material and research achievements. Made some conclusions by the main characters of the remote sensing, the development of regional geological structure,the basic characteristics of ore deposits and the structural ore-control characteristics:1. Judging from remote sensing image, The south of NingXia province area is situated in the eastern Yunnan Province,in the NNE-tending metallogenic belt which named Qiao Jialianfeng fracture zone (another name is Lianfeng- Jinsha River fracture), there are two intensive mineralization districts in the fault zone, and have a superior metallogenic condition;2. The south of Ningnan area went though Chengjiang orogeny, Caledonian orogeny, Hercynian-Indonesian orogeny, Yenshan orogeny and Himalayan orogeny. Regional geological background development provide advantageous structural conditions of formation of lead zinc ore in the south of NingXia province; Gushing out of basalt in hercynian provide good thermal condition for Pb-Zn metallogenesis; Yanshanian strong folding orogeny provide favourable Ore matching tectonic and nice space for mineralization.function is to ride the mule ditch mining area provides good let mine, ore matching structure;3. lead zinc ore of Qi Luogou originate in layer lighted on the sinian section (ec) group, Guanyinya Fm-Dengying (Tongying) Fm-Qiongzhusi Fm which form in rifting of Sinian-Early Paleozoic continental shelf provide nice covert space for mineralization; The layer which contain algous in layer lighted on the sinian section (ec) group provide nice abundant ore;4.The research shows that basic geological structure of Qiluogou lead-zinc mine zone is that:nearly ns-trending Qiluogou anticline, subprime of vertical and horizontal small drape;North north west, north and south, north north east to the longitudinal fracture, east-west fracture and two periods including early and late bedding shear structure.5. Xiaojiang fracture is the fracture that leads the ore, subprime SN shear fracture is for ore matching.NNW, nearly SN-trending fracture and lately bedding shear fracture zone are for letting ore structure. |
PDF Full Text Request