Research On The Ore-controlling Factors, Metallogenic Regularity And And Prediction Of Lead-zinc Ore District In Northwest, Guizhou

The lead and zinc metallogenic zone in Chuan - Dian-Qian district lies at the southwest edge of Yangzi platform and in the zone which is surrounded by three deep fracture zones named by Xiaojiang,Shi zhong-MiLe,YaDou-ZiYun. The metallogenic zone is one of sixteen important metallogenic provinces during "10.5 Year Plan "and" 11.5 Year Plan "in our country. The metallogenic zone of lead and zinc ore in the northwest of Qian lies at the east of the metallogenic zone of lead and zinc ore in Chuan - Dian-Qian district. It is one of the important lead and zinc mines in Guizhou province. This place has the potential of seeking middle-scale or large-scale lead and zinc deposit, because physics and chemistry prospection abnormity appears the group- shaped and belt-shaped distribution and the metallogenic geological condition is superior.Regional structure spreading in the lead and zinc metallogenic zone in the northwest of Qian and lead-zinc mineralization in this place takes on obvious belt-shaped distributing character. The author divides four structure belts and three metallogenic sub- belts based on the structure and mineralization feature of the metallogenic zone. This dissertation firstly sets forth in the detail the evolvement character of regional structure, the geologic character and metallogenic character of every structure belt and metallogenic sub- belt, the relation between physics and chemistry prospection abnormity and lead and zinc metallogenyThe research on the metallogenic factor and controlling factors for lead-zinc deposits shows that the metallogenic factors of lead and zinc in this place include stratum(Sl-2hj-Plm), lithology(carbonate rock), structure (NW overthrust fault mainly + NE cross fracture + fracture belt and anticline plunging end) , eruptive (beside diabase, under basalt stratum) , lithofacies (overlap up argillaceous and under carbonate lithofacies), sediment environment (inboard submarine carinate uplift ,closed or half-closed reducing lagoon deposit entironment) etc. Fracture is the most important controlling metallogeny factor and control factors for ore deposit by lithology precede over horizon.