本文關(guān)鍵詞： 卡拉麥里 金礦 多源信息 成礦預(yù)測(cè)　出處：《新疆大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：新疆東準(zhǔn)噶爾卡拉麥里成礦帶位于西伯利亞板塊和準(zhǔn)噶爾板塊縫合部位,深大斷裂構(gòu)造較為發(fā)育,屬于卡拉麥里-莫?dú)J烏拉成礦帶,金礦成礦地質(zhì)條件優(yōu)越,具有形成大型金礦床的潛力,是新疆重要的金及多金屬成礦帶。本文以雙泉金礦和庫(kù)布蘇金礦作為典型金礦床,研究其成礦地質(zhì)特征,總結(jié)控礦因素。研究區(qū)內(nèi)金礦化受斷裂構(gòu)造控制明顯,發(fā)育在斷裂構(gòu)造密集區(qū)及斷裂附近部位。研究區(qū)內(nèi)地層具有成礦專(zhuān)屬性,90%以上的金礦點(diǎn)均分布于泥盆系及石炭系地層中,二者均具有較高的金背景值。金礦化分布受熱液活動(dòng)范圍控制,通常發(fā)育在巖體的外接觸帶上。結(jié)合典型金礦床的研究,收集了研究區(qū)內(nèi)1:20萬(wàn)區(qū)域地質(zhì)資料、1:20萬(wàn)化探資料及ETM+遙感資料。在ArcGIS平臺(tái)下建立空間數(shù)據(jù)庫(kù),進(jìn)行集成并統(tǒng)一。對(duì)遙感影像進(jìn)行了幾何校正、圖像融合、圖像鑲嵌、圖像裁剪和圖像增強(qiáng)等處理后,結(jié)合區(qū)域地質(zhì)圖建立地質(zhì)類(lèi)要素集。主要包括沉積(火山)巖、侵入巖、蝕變巖、地質(zhì)界線、斷層、礦點(diǎn)等要素。對(duì)航磁數(shù)據(jù)及化探數(shù)據(jù)正態(tài)分布化處理后,進(jìn)行空間插值建立物化探類(lèi)要素集。通過(guò)單因素與成礦的關(guān)系研究,確定斷層距離、地層、Au元素地球化學(xué)異常為主要影響因子;斷層密度、與侵入巖體距離(熱液活動(dòng)范圍)為次要影響因子;As元素地球化學(xué)異常、航磁數(shù)據(jù)為非影響因子不參與綜合評(píng)價(jià)。在Arc GIS平臺(tái)下,依據(jù)影響因子對(duì)成礦的有利度大小賦予不同權(quán)重值�；跂鸥駡D層對(duì)各影響因子進(jìn)行重分類(lèi)及柵格計(jì)算。柵格像元值越大越有利于成礦。依據(jù)對(duì)多源信息的綜合分析,最終圈定5處成礦潛力區(qū)分別為:清水成礦潛力區(qū)、雙泉成礦潛力區(qū)、蘇吉泉東成礦潛力區(qū)、庫(kù)布蘇成礦潛力區(qū)、北塔山成礦潛力區(qū)。其中清水成礦潛力區(qū)及北塔山成礦潛力區(qū)已定為金、銅普查區(qū),并開(kāi)展了相關(guān)工作。
[Abstract]:The Karamaili metallogenic belt in eastern Junggar, Xinjiang, is located at the suture site of Siberian plate and Junggar plate. The deep fault structure is relatively developed and belongs to the Karameli-Mochin Ula metallogenic belt, and the ore-forming geological conditions of gold deposits are superior. It is an important gold and polymetallic metallogenic belt in Xinjiang. In this paper, Shuangquan gold deposit and Kubusu gold deposit are used as typical gold deposits to study their metallogenic geological characteristics. The ore-controlling factors are summarized. The gold mineralization in the study area is obviously controlled by the fault structure, and developed in the area of concentrated fault structure and near the fault. More than 90% of the gold deposits with metallogenic specificity in the study area are distributed in the Devonian and Carboniferous strata. Both of them have higher gold background value. The distribution of gold mineralization is controlled by the range of hydrothermal activity and usually developed in the outer contact zone of rock mass. The 1: 200 000 geochemical data and ETM remote sensing data of the 1:20 regional geological data in the study area were collected. The spatial database was established under the ArcGIS platform to integrate and unify the remote sensing images. The geometric correction, image fusion and image mosaic of the remote sensing images were carried out. After image clipping and image enhancement are processed, the geological elements are set up in combination with the regional geological map. They mainly include sedimentary (volcanic) rock, intrusive rock, altered rock, geological boundary, fault, etc. After the normal distribution of aeromagnetic data and geochemical data is processed, the geophysical and geochemical exploration elements set is established by spatial interpolation. The fault distance is determined by studying the relationship between single factor and mineralization. Geochemical anomaly of au element in strata is the main influencing factor, fault density and distance from intrusive rock mass (range of hydrothermal activity) are secondary influencing factors of geochemical anomaly of element as. Aeromagnetic data are non-influential factors and do not participate in comprehensive evaluation. Under the Arc GIS platform, According to the influence factors, the influence factors are reclassified and calculated based on the grid layer. The larger the grid pixel value is, the more favorable the mineralization is. Based on the comprehensive analysis of the multi-source information, Finally, five metallogenic potential areas are delineated as follows: clear water metallogenic potential area, Shuangquan metallogenic potential area, eastern Sujiquan metallogenic potential area, Kubusu metallogenic potential area, etc. North Tashan metallogenic potential area, in which clear water metallogenic potential area and North Tashan metallogenic potential area have been designated as gold and copper survey area, and relevant work has been carried out.
【學(xué)位授予單位】：新疆大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.51

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相關(guān)期刊論文 前1條

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本文編號(hào)：1539979