| Study area is a part of forland overthrust tectonic belt, west rim of Lanping-Simao basin, east to the entire study area, on the plane and Lancang Orogen towards the same. From orogenic belt to the basin, according to its deformation characteristics and structural combinations, Lancang River fault(F6), Gou River- Celestial fault(F7) for the community, from west to east,the cover structure can be divided into central Nappe, foreland thrust belt and foreland thrust- slip tape. Metallogenic belt located in the foreland thrust belt, mineralization and foreland thrust belt evolution are closely related. Tectonic pattern foreland thrust belt can be attributed to the results of the East since Triassic Tethys long-term evolution, its structure since the Triassic sequence is a sequence of East Tethys evolution. The objective geological and geological phenomena in the area of the eastern Tethys evolution linked to Bangong- Nujiang Tethyan Ocean from extinction to the convergence of the whole orogenic evolution of the main line, resulting in a sequence of the region’s geological structure It can be divided into three periods, four evolutionary stages, six modified sequence.Research by typical deposit geological characteristics results: ① according to mine strata exposed of Shuixie mining, magmatic rocks, structures and deposit characteristics, Shuixie copper-cobalt is hydrothermal deposit; ② according to Shuixie mining discharge fluid inclusions component analysis, Shuixie copper cobalt ore forming fluids belong to the NaCl-CO2-H2 O system; ③ inclusion types are pure liquid inclusions, inclusions of pure gas, gas-liquid two-phase inclusions and daughter mineral-containing inclusions in the gas-liquid two-phase inclusions Lord, some filled with inclusions of continuous change, showing the boiling inclusions; ④ mineral composition and temperature of fluid inclusions results show that copper and cobalt mine of Shuixie forming fluids in low temperature(the temperature in the main), medium salinity, medium-density fluid, seen below Yongping Changjie- Shuixie-Nanjian Xinmin high temperature copper, cobalt metallogenic belt; ⑤ Shuixie main mineralization stage copper-cobalt deposit of quartz 40Ar-39 Ar isotopic neutron activation analysis age 59.2 ± 0.8Ma.Metallogenic belt in two plates with the Department, the regional tectonic setting of complex, multi-level, multi-phase development times of structural features. Multilevel structure ore control system significantly. Lancang River fault(F6) is a regional deep faults. Sedimentary, magmatic, metamorphic has significant control effect. The fault is Lanping-Simao(arc) foreland basin boundary fault, but also the western margin of the basin piedmont thrust- nappe fault. Gou Street River fault(F7) to the regional Gou River- Celestial break in the middle, is the foreland thrust belt and foreland slip boundary fault zone, the study area was the NW-SE distribution along River Street and Gou coast extends throughout the study area. Lancang River fault(F6) and Gou Street River fault(F7) is the water discharge control fracture copper and cobalt ore belt and foreland thrust belt occurrence of faults and folds f6-1-f6-7 control DEPOSIT, distribution of secondary faults and folds more control orebody distribution, morphology, occurrence.Carbon, hydrogen, oxygen, sulfur and lead isotope analysis showed that Shuixie copper and cobalt ore forming fluids come from the magma and the process of mineralization and atmospheric water, ground water, mixing occurs; a source of minerals exhibit pluralism sex, thought to be the initial source of magma into the mineral reactions occur in the process of mineralization and formation, part of a mineral extraction in the formation, isotope analysis showed this feature. Relationship series by structural deformation and mineralization, preliminary draw: have an important structure Yanshan Sanjiang metallogenic belt Tethyan domain- magmatic- metallogenic events generally. Thus, Shuixie copper and cobalt ore bodies is concerned magma intrusion brought into mineral related, Yanshan tectonic movement, magma intrusion bring hydrothermal fluid, and groundwater containing materials formed water circulation,in the depths of the earth.About 59.2 ± 0.8Ma, study area into the third stage of orogenic deformation series period, foreland thrust belt NNW direction, SN(F6, F7, f6-1 ~ 15, f7-1 ~ 39) formed to folds, faults, tectonic framework of stereotypes, as a mineral transport provides the driving force and the favorable environment of space, the final precipitation and mineralization. |
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