青海省都兰县红旗沟金矿区控矿构造研究

发布时间：2018-05-08 00:11

本文选题：青海 + 东昆仑　；参考：《成都理工大学》2017年硕士论文

【摘要】：针对东昆仑五龙沟矿田红旗沟矿区,基于导师团队早期研究和既有勘查成果,通过野外地质调查,矿床地质特征解析,较系统分析了不同层次构造变形对岩浆侵位、矿化蚀变发生、矿体产出的控制特征,得出如下认识:五龙沟矿田受控于格尔木-五龙沟变形变质核杂岩构造,经历了早期韧性变形、晚期脆性变形。早期韧性变形,可分为韧性和韧-脆性两个变形阶段。韧性变形阶段具有左行正滑的特征;脆-韧性变形阶段,可进一步分为三个亚阶段,具有左行正滑→左行逆冲→右行正滑的特征。晚期韧脆性-脆性变形阶段,可分为三个亚阶段,具有右行正滑→左行逆冲→右行正滑的特征。多期多阶段脆-韧性、韧脆性变形发展,形成了矿区北西向为主构造线的网状断裂格局,其中,北北西、北北东、近东西向断裂,为主干断裂不同动向演进过程形成的次级断裂。核杂岩构造及早期脆韧性褶断构造控制了早期岩基的侵位和空间分布;多期不同动向的韧脆性—脆性变形的褶断变形构造,一方面,控制了不同类型后期岩枝、岩脉、岩株的侵位和空间分布,另一方面,使早期形成的大型岩体遭受变形破坏。表壳以北西向褶断为主干的网状断裂褶皱系统,与深部拆离逆冲推覆断裂,联合形成包括红旗沟金矿床在内的五龙沟金矿田的矿化控制系统,控制了矿化蚀变带的形成,主干断裂多期不同动向活动,衍生不同产状次级配套断裂,不同时期不同配套断裂及主干断裂,不同部位挤压、伸展状况不同,伸展舒张断裂构成当期容矿/液构造,最终造成北西向、北北西向、北北东向及近东西向断裂均控制矿化蚀变带。金矿化体严格产于矿化蚀变带中,由于控制矿化蚀变的不同级次断裂空间分布的规律性,金矿体的产出具侧列再现,尖灭再现的分布规律,少数沿断裂带间贯通的剪节理在褶皱形成的虚脱部位产出。
[Abstract]:In view of the Hongqi gully mining area in the Wulong Gou mining field in East Kunlun, based on the early study of the tutor team and the existing exploration results, through the field geological survey and the geological characteristics of the deposit, the characteristics of the magma emplacement, the mineralization and alteration and the control of the ore body output are systematically analyzed. The following understanding is that the Wulong gully ore field is controlled by the grid. The deformation metamorphic core complex structure of the Er Mu Wulong gully has experienced early ductile deformation and late brittle deformation. Early ductile deformation can be divided into two stages of ductile deformation. Ductile deformation can be divided into ductile and ductile brittle phase. The ductile deformation stage has the characteristics of positive slip in the left line; the brittle ductile deformation stage can be further divided into three substages, with left horizontal sliding, left thrust and right The stage of late ductile brittle brittle deformation can be divided into three sub stages, with the characteristics of right sliding, left thrust and right straight slip. The multistage and multistage brittle ductile and ductile brittle deformation developed and formed a network fracture pattern of the North West to the main tectonic line in the mining area, in which the North NNW, the north to East, the near east-west fault, the main fault. The secondary faults formed by the evolution of different trends of the dry fracture. The structure of the nuclear complex and the early brittle ductile fault structure control the emplacement and spatial distribution of the early rock foundation, and the pleat and broken structures of the brittle brittle deformation of many different trends, on the one hand, the emplacement and spatial distribution of different types of rock branches, veins, and strains of rock are controlled. On the one hand, the early formation of large rock mass is subjected to deformation and destruction. The reticular fracture fold system which is the main trunk of the North West fold fault, and the deep detachment and thrust nappe fault, combine to form the mineralization control system of the Wulong gully gold field, including the Hongqi gully gold deposit, and control the formation of the mineralized alteration zone, and the main faults are different in different periods. There are different secondary supporting faults, different supporting faults and main faults in different periods, different parts extrusion and different extension conditions, extensional diastolic faults constitute the current stage of ore bearing / liquid structure, and eventually lead to northwestern, North NNW, North NNE and Near East faults control mineralized alteration zone. The gold mineralization body is strictly produced In the mineralized alteration zone, due to the regularity of the spatial distribution of different grading faults in the mineralization alteration, the production of gold deposits is reproduced in the side column, the distribution of the apex and the distribution of the distribution, and a few of the shear joints through the fracture zones are produced in the void part of the folds.

【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.51

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