| Redstone copper mine in recent years for nonferrous metals mineral geological survey center discovery and exploration of large copper (zinc) gold exploration development base, kara tager area is located in the southern margin of tuha basin, xinjiang big south lake-head Su Quan Paleozoic of the northern section of island arc belt, the ore-forming condition is superior, rich in mineral resources. Mining area is located in kara tager uplift in the east of the core, to anticlinorium area on the north’s nuclear units, is a very large low temperature volcanic hydrothermal deposit. Mining complex geological structure, frequent magmatic activity and deformation and metamorphism, experienced multiphase tectonic movement, accompanied by strong volcanic magmatism at the same time.In this paper, in the tunnel with different direction of fracture structure plane in detail, the study of the geological mechanics properties of tectonics, ore deposit from space observation analysis, through field geological survey, indoor test and analysis, comprehensive analysis and other methods of mathematical statistics, summarize its regularity, tectonic dynamics divide the construction period of time. And through the geological mechanics research of tectonic stress field has carried on the back, it is concluded that mining fracture tectonic evolution model. The results show that the volcanic tectonic fracture structure is controlled by a high-level area, and connected to the local regional structure of the compound, increase the permeability of rocks, conducive to the migration of ore fluid, jointly controlled rock ore. Mining fissure on the space to be displayed in groups, groups of regularity, show that a stable dominant ore-controlling tectonic controls the formation of copper ore body. From deep in the process of mineralization of ore-bearing hydrothermal along nearly EW-NWW to nearly SN to breaking up, migration, and along the extraction of rock minerals and mixed with ore fluid and shallow, in zhang-transtensional activity nearly ns-trending fault and its secondary fractures in the filling of the nature of mineralization and hydrothermal filling type ore vein. Redstone copper development there are four different nature of the fault zone: the first phase for the nearly EW and NWW to extensional fault zone, mainly by regional north north east to tensile stress is formed, they are formed basement faults at the same time, as the main ore-controlling structure in ore mining area; The second period for nearly SN to extensional faults, east-west tension formed mainly by area, inherited development mineralization; The third period for NE to NEE and to shear fracture pressure, mainly by regions of north and south to horizontal shear a left-handed and a pair of north north east to the horizontal shear force and form; The fourth period for NW compression shear fracture, mainly by a pair of dextral horizontal shear and north and south area thing north and south to the tension and a pair of right hand in the direction of horizontal shear and east-west tension and form, is the main ore structure.The ore-forming hydrothermal itself for rock burst effect was also involved in the lead ore structure and ore formation.:in terms of tectonic geochemistry and Cu elements had significant positive correlation of elements is:Fe, Au,Ni,U. |
PDF Full Text Request