【摘要】：山陽(yáng)-柞水礦集區(qū)屬于中秦嶺弧前盆地系,經(jīng)歷了古生代俯沖-增生造山作用和中生代碰撞造山作用,區(qū)內(nèi)構(gòu)造、巖漿活動(dòng)強(qiáng)烈,成礦地質(zhì)條件優(yōu)越,區(qū)內(nèi)已發(fā)現(xiàn)眾多斑巖-矽卡巖型礦床。冷水溝銅金礦是近年來(lái)發(fā)現(xiàn)的斑巖型銅金礦床,具有良好的成礦遠(yuǎn)景,但研究程度較低。本論文選取山陽(yáng)-柞水礦集區(qū)內(nèi)的冷水溝斑巖型銅金礦床作為研究對(duì)象,主要通過(guò)野外調(diào)查、節(jié)理分期配套、斷層幾何學(xué)、運(yùn)動(dòng)學(xué)及動(dòng)力學(xué)研究與分析、顯微構(gòu)造分析來(lái)重點(diǎn)研究礦區(qū)構(gòu)造樣式、構(gòu)造演化規(guī)律及構(gòu)造與成礦關(guān)系,以期對(duì)冷水溝礦區(qū)外圍找礦乃至山陽(yáng)-柞水地區(qū)同類(lèi)礦床的找礦工作提供參考,本論文取得了如下主要認(rèn)識(shí):1、“二元”結(jié)構(gòu):礦區(qū)內(nèi)存在兩套呈角度不整合接觸的地層,形成了由新元古代基底與晚古生代蓋層組成的“二元”結(jié)構(gòu),指示本區(qū)在新元古代至晚古生代經(jīng)歷過(guò)撓曲與隆起。元古代基底主要由閃長(zhǎng)巖、花崗巖和斜長(zhǎng)角閃巖組成,古生代蓋層主要由灰?guī)r、粉砂質(zhì)泥巖、礫巖組成。2、三期斷層:斷層幾何學(xué)、運(yùn)動(dòng)學(xué)、動(dòng)力學(xué)特征觀測(cè)與分析,結(jié)合礦區(qū)內(nèi)節(jié)理的分期配套將礦區(qū)內(nèi)斷層分為三期:第一期韌性左行剪切斷層;第二期北西北東向脆韌性共軛斷層;第三期東西向、南北向脆性斷層。3、構(gòu)造與成礦關(guān)系:礦區(qū)內(nèi)的銅鉬礦化的展布主要受斑巖體控制,而斑巖體則受到早期構(gòu)造薄弱帶控制,如早期的斷層與褶皺的核部。礦區(qū)內(nèi)的金礦化受韌性、脆韌性斷層控制,其中第二期北西北東向脆韌性共軛斷層是最重要的控礦構(gòu)造,因此,在本礦區(qū)內(nèi)及外圍的找礦工作中可對(duì)第二期斷層重點(diǎn)關(guān)注。
[Abstract]:The Shanyang-tussah ore concentration area belongs to the middle Qinling arc front basin system and has experienced the Paleozoic subduction-accretive orogeny and Mesozoic collision orogeny. The tectonic and magmatic activities in the area are strong, and the ore-forming geological conditions are superior. Many porphyry-skarn deposits have been found in the area. Lengshuigou copper and gold deposit is a porphyry copper-gold deposit discovered in recent years. In this paper, the Lengshuigou porphyry copper-gold deposit in Shanyang-tussah ore gathering area is chosen as the research object, which is mainly studied and analyzed by field investigation, joint matching by stages, fault geometry, kinematics and dynamics. The microstructural analysis focuses on the structural style, tectonic evolution law and the relationship between structure and metallogenesis in the ore area, in order to provide a reference for prospecting in the periphery of the Lianggou mining area and in the similar ore deposits in Shanyang-Zhashui area. In this paper, we have obtained the following main understanding: 1, "binary" structure: there are two sets of unconformable strata in the mining area, forming a "binary" structure consisting of the Neoproterozoic basement and the late Paleozoic caprock. It indicates that the area experienced flexure and uplift from Neoproterozoic to late Paleozoic. The Proterozoic basement is mainly composed of diorite, granite and amphibolite, and the Paleozoic caprock is mainly composed of limestone, silty mudstone and conglomerate. The faults in the mining area are divided into three phases: the first stage of the ductile left shear fault; the second phase of the NNW ductile conjugate fault; the third phase of the east-west direction. The relation between structure and mineralization: the distribution of copper-molybdenum mineralization in the ore area is mainly controlled by the porphyry, while the porphyry is controlled by the early tectonic weak zone, such as the core of the early fault and fold. The gold mineralization in the mining area is controlled by ductile and brittle-ductile faults, of which the second phase NNW-trending brittle-ductile conjugate fault is the most important ore-controlling structure.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P613

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相關(guān)期刊論文 前10條

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本文編號(hào)：2235633