新疆和布克赛尔县伊克托里布拉格矿区隐伏断裂的确定及其对成矿的作用

发布时间：2018-05-30 10:57

本文选题：隐伏断裂 + 音频大地电磁测深法　；参考：《新疆大学》2015年硕士论文

【摘要】：新疆和布克赛尔县伊克托里布拉格金矿位于西准噶尔雪米斯坦背斜南翼西南端,构造位置上处在准噶尔板块北缘古生代陆缘活动带内晚古生代成熟岛弧之上。伊克托里布拉格金矿西部存在典型的破碎蚀变岩型金矿-哈尔曼金矿,二者处于同一成矿带。伊克托里布拉格金矿也为破碎蚀变岩型金矿,该类型金矿床主要受火山机构和断裂构造相控制。破碎蚀变岩型金矿床的空间产出受区域深大断裂或区内隐伏断裂控制。断裂对该类型矿床的空间位置控制更加明显,一般该类型矿床产出在断裂带附近。因此,对该类型矿床内断裂构造进行研究有利于确定断裂构造在成矿中的作用。本文研究区第四系地层覆盖面积大,前人推测其所在1:50000区域地质图内两条断裂构造穿越该研究区。断裂构造空间位置及规模对研究区内金矿床具有重要意义。以往地质工作尚未明确厘定断裂的准确位置,本次工作的目的就是为了确定断裂构造及其次级断裂的具体位置及空间展布。在厘定矿区隐伏断裂的基础上,结合前人资料及具体工作要求,进行物探方法可行性分析,确定具体工作方法(音频大地电磁测深法),进而分析其对成矿的作用。对测量获取数据进行处理,资料解释,开展对矿区内隐伏断裂的圈定工作。采用音频大地电磁测深法对伊克托里布拉格矿区隐伏断裂进行圈定,圈定该矿区内6条规模较大的断层:F7、F8、F10、F11、F12、F13,5条规模较小的断层:F14、F15、F16、F17、F18。其中F7、F8为区域性断裂,F10—F18为F7、F8的次一级断裂。圈定出断层F7、F8的准确位置,为下一步矿区工作指明方向。金矿区矿体产在两条主断裂交叉处,即F7断裂(近东西向)与F8断裂(断裂东端北东向)交汇位置。F7、F8断裂,控制金矿体产出空间位置。F8断裂上发育的近北西向的次级断裂F14-F18是主要的容矿、含矿构造。
[Abstract]:The Iketoli Bragg gold deposit in Xinjiang and Bukeser County is located at the southwest end of the southern wing of the West Junggar Shemistan anticline, and the tectonic position is above the late Paleozoic mature island arc in the Paleozoic continental margin active belt of the northern margin of the Junggar plate. There is a typical broken altered rock type gold deposit-Harman gold deposit in the west of Iketoli Bragg gold deposit, both of which are located in the same metallogenic belt. The Iketoli Bragg gold deposit is also a broken altered rock type gold deposit, which is mainly controlled by volcanic mechanism and fault tectonic facies. The spatial occurrence of broken altered rock type gold deposits is controlled by regional deep faults or hidden faults. The fault controls the spatial location of this type of deposit more obviously, and generally occurs near the fault zone. Therefore, the study of fault structure in this type of deposit is helpful to determine the role of fault structure in mineralization. The Quaternary strata cover a large area in this study area. It is assumed that two faulted structures in the 1: 50000 regional geological map pass through the study area. The spatial location and scale of fault structures are of great significance to gold deposits in the study area. The purpose of this work is to determine the specific location and spatial distribution of the fault structure and its secondary faults. On the basis of determining hidden faults in mining area, combining with previous data and specific work requirements, the feasibility analysis of geophysical prospecting method is carried out, and the specific working method (Audio magnetotelluric sounding method) is determined, and its effect on mineralization is analyzed. Processing and interpretation of survey data and delineation of hidden faults in mining area are carried out. Audio magnetotelluric sounding method was used to delineate the hidden faults in the Iketoli Bragg mining area, and six larger faults in the area were delineated. There are 5 smaller faults: F14, F15, F16, F17F17, F18, F10, F10, F11, F12, F135. Among them, F _ 7 / F _ 8 is a sub-primary fault of regional fault and F _ (10) F _ (18) is F _ (7) F _ (8). The accurate location of fault F 7 F 8 is delineated, and the direction of further work is pointed out. The orebody in the gold ore area is located at the intersection of two main faults, I. e., the junction of F7 fault (near EW) and F8 fault (NE of the fault end). The secondary fault F14-F18, which controls the spatial position of the gold deposit. F8 fault, is the main ore-bearing and ore-bearing structure.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.51

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