發(fā)布時(shí)間：2019-04-02 20:24

【摘要】：河西地區(qū)大地構(gòu)造位置位于東昆侖弧盆系與康西瓦-南昆侖-瑪多-瑪沁-勉縣-略陽(yáng)對(duì)接帶結(jié)合部,構(gòu)造線主體呈北西西向,東昆中斷裂帶橫貫研究區(qū)中南部,區(qū)內(nèi)經(jīng)過(guò)加里東期、華力西期、印支期、燕山期多期次巖漿活動(dòng),出露地層以古元古界結(jié)晶基底、中新元古界變質(zhì)基底,以及三疊系碎屑巖-火山巖建造為主,經(jīng)過(guò)了呂梁期、晉寧期、華力西期、印支期多期次區(qū)域變質(zhì),具有良好的銅、金、鉛鋅、鎳等有色金屬、貴金屬礦成礦條件。本文全面收集了該地區(qū)去已有的區(qū)域地質(zhì)礦產(chǎn)工作資料,對(duì)研究區(qū)內(nèi)的成礦地質(zhì)背景、地球化學(xué)條件、地球物理?xiàng)l件進(jìn)行了全面、系統(tǒng)的分析,獲取了大量的有用信息。通過(guò)對(duì)比區(qū)內(nèi)典型礦床的地質(zhì)特征等,對(duì)河西地區(qū)控礦因素進(jìn)行了分析,確定了找礦標(biāo)志,建立了預(yù)測(cè)找礦模型,最后綜合圈定了找礦遠(yuǎn)景區(qū)及找礦有利靶區(qū)。論文取得的主要成果和認(rèn)識(shí)如下:(1)系統(tǒng)收集了河西地區(qū)地質(zhì)資料,對(duì)文字資料進(jìn)行了分類歸并,圖件資料在MAPGIS平臺(tái)進(jìn)行了矢量化和屬性結(jié)構(gòu)添加,建立了研究區(qū)基礎(chǔ)地質(zhì)數(shù)據(jù)庫(kù)。(2)重點(diǎn)對(duì)河西地區(qū)的地球化學(xué)條件進(jìn)行系統(tǒng)整理和研究,分別分析描述了與Au相關(guān)的4個(gè)綜合異常。其中HS25號(hào)異常,該異常強(qiáng)度高,濃集中心明顯,現(xiàn)已有礦權(quán),是一礦致異常,在HS23、HS32、HS33號(hào)異常內(nèi)均發(fā)現(xiàn)銅金礦化點(diǎn),肯定了異常的存在,說(shuō)明本區(qū)找金前景十分樂(lè)觀。(3)系統(tǒng)地對(duì)研究區(qū)內(nèi)典型礦床納赤臺(tái)金礦礦床類型及分布特征進(jìn)行詳細(xì)研究。(4)系統(tǒng)的對(duì)河西地區(qū)的成礦地質(zhì)條件進(jìn)行分析,確定了找礦標(biāo)志,建立了預(yù)測(cè)找礦模型,最后在研究區(qū)綜合圈定了3個(gè)找礦遠(yuǎn)景區(qū),并確定了3個(gè)重點(diǎn)靶區(qū)、5個(gè)中等靶區(qū)及1個(gè)一般靶區(qū)。
[Abstract]:The tectonic location in Hexi area is located at the junction of the East Kunlun arc basin system and the Kangxiwa-South Kunlun-Mado-Maqin-Mian County-Laoyang docking zone. The main body of the tectonic line is NW-trending, and the Dongkun fault rift belt crosses the central and southern parts of the study area. Through Caledonian, Variscan, Indosinian and Yanshanian magmatic activities, the exposed strata are mainly composed of Gu Yuan Paleozoic crystalline basement, Miocene Proterozoic metamorphic basement and Triassic clastic rock-volcanic rock formation. Jinning period, Hualixi period, Indo-Chinese period multi-stage sub-regional metamorphism, has good copper, gold, lead, zinc, nickel and other non-ferrous metals, precious metal ore metallogenic conditions. A comprehensive and systematic analysis of the metallogenic geological background, geochemical conditions and geophysical conditions has been made in this paper, and a great deal of useful information has been obtained from the comprehensive collection of the existing regional geological and mineral resources data in the area in which the ore-forming geological background, geochemical conditions and geophysical conditions of the study area have been studied. By comparing the geological characteristics of typical ore deposits in the area, the ore-controlling factors in Hexi area are analyzed, the ore-prospecting criteria are determined, the ore-prospecting model is established, and the prospecting prospect and favorable targets for ore-prospecting are comprehensively delineated. The main achievements and understandings obtained in this paper are as follows: (1) the geological data of Hexi area are collected systematically, the text data are classified and merged, and the map data are vectorized and attribute structure added on the MAPGIS platform. The basic geological database of the study area has been established. (2) the geochemical conditions in Hexi area have been systemically sorted and studied, and four comprehensive anomalies related to Au have been analyzed and described respectively. Among them, the HS25 anomaly, which is of high intensity and obvious concentration center, is an anomaly caused by one ore. Copper and gold mineralization points are found in the HS23,HS32,HS33 anomaly, which confirms the existence of the anomaly. (3) the types and distribution characteristics of the typical gold deposits in the study area are studied in detail. (4) the metallogenic geological conditions in Hexi area are analyzed systematically, and the ore-forming geological conditions in Hexi area are analyzed systematically. (3) the gold deposit types and distribution characteristics of the typical gold deposits in the study area are studied in detail. The prospecting criteria are determined and the predictive prospecting model is established. Finally, three prospecting prospect areas are comprehensively delineated in the study area, and three key target areas, five medium target areas and one general target area are determined.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.51

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