Sichuan Silver Factory Building Gully - Riding Into The Lead And Zinc Mine Tectonic Geochemical Characteristics And Metallogenic Prediction

The yinchanggou-qiluogou Pb-Zn deposit is located in Nanning county of Sichuan province. Geotecture is located in the area of Sichuan-Yunnan-Guizhou Pb-Zn polymetallic mineralization, which is on the east of kangding-yunnan earth axis of southwest edge of Yangtze block; area is in the west of Xiaojiang’s zone of fracture (Qiaojia-Bushi-Zhaojue of fracture), the north-east of Puge-Ningnan’s zone of fracture, and the south-east of Huili-Ningnan’s zone of fracture. The intersection of three zones of fracture forms the triangle of fracture knot which is beneficial for magmatic hydrothermal activities. This structure provides good transport channel and storage space for the study of metallogenic.Based on the previous studies and date, and through studying the geological background, mining area, and geological characteristics of deposit, this study summarized the regularity and ore-controlling factors of Pd-Zn deposit in a specific zone. Meanwhile, the author launched a study on geochemistry and ore prospecting by theory and method of tectonic geochemistry based on the characteristics of mineral deposit. Through above research, the results are as followed:1.The Pd-Zn deposit is mainly controlled by formation lithology and structure.The strata is upper dengying formation of the Upper Sinian Series, the lithology is siliceous band of the light gray medium to thick dolomite, and the structure of strike are North West, North West and North-south, the structure of dip NE, NEE and E.2.The Pd-Zn deposit distributed along the North West, North West and nearly north-south tectonic belt, and the body of Pd-Zn deposit became thicker and more abundant that before in the position of derived and jointed fractures. The final result formed’Ru-junction’mining structure in study zone.3.Through the factor analysis of tectonic geochemistry date, this study showed tectonic geochemistry elements include As, Cu, Pb, Zn, Ba. Mn, Mo, Bi, Sc, Th, Yb, Sr, Ga, Nb, Co, Sb, Ta, Cr, Cd, Ni, Ti and V etc. combined with geological characteristics, this study considered metallogenic environment is mainly low-medium temperature environment. Metallogenic materials have a abundant resource, but the main resource is original from basement of Sinian system and Sinian Series, and the mineralization are more-periodicity and complexity.4.To obtain the anomaly pattern of tectonic geochemistry by dealing with the factor scores. Then to combine geochemical anomaly pattern and the pattern of underground geology to obtain tectonic geochemical anomaly pattern. The result showed that this tectonic geochemical anomaly pattern belongs to the elliptic type by analyzing the structure characteristics of it. The anomalism is showed that there is ore body on the surface and internal of long axis, which is in the North West, North West and North-South.5.Based on the abnormal characteristics of geochemical structure, and combine with the geological characteristics of study area, to delineated four prospecting target zones. These zones include two zones of the one-level prospecting target and two zones of two-level prospecting target. The result found the drill exposure’s ore body which is three meters of thickness and Pb+Zn overtop5%by engineering verification in1sd Pb-Zn targets of the2450m level in Qiluogou. Above result proved that tecto-geochemistry method is effective for geological exploration in the study field of geology.