發(fā)布時(shí)間：2018-03-01 01:07

  本文關(guān)鍵詞： 沙熱塔什鉛鋅礦 遙感找礦模型 ASTER 成礦遠(yuǎn)景區(qū)　出處：《新疆大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：烏恰縣沙熱塔什鉛鋅礦位于塔里木盆地(Tarim Basin)西北緣、邁丹他烏古生代陸緣地-塔里木盆地西北緣新生代陸內(nèi)盆地一帶,屬塔里木西北緣層控型鉛鋅成礦帶。成礦區(qū)帶屬闊克沙勒嶺Fe-Cu-Pb-Zn-Sn-鋁土礦礦帶,其外圍顯示出良好的找礦遠(yuǎn)景。通過(guò)研究區(qū)域成礦地質(zhì)背景、控礦要素、成礦規(guī)律、遙感致礦異常特征和典型礦床解剖,從已獲得的地質(zhì)數(shù)據(jù)與資料中,針對(duì)優(yōu)勢(shì)礦產(chǎn)成礦地質(zhì)背景提取遙感找礦標(biāo)志,建立遙感找礦模型。進(jìn)行遙感地面驗(yàn)證,對(duì)遙感找礦模型進(jìn)行修正,并圈定遙感找礦遠(yuǎn)景區(qū)。本文以新疆烏恰縣沙熱塔什一帶為研究區(qū),結(jié)合已有的區(qū)域地質(zhì)礦產(chǎn)調(diào)查項(xiàng)目資料,主要是以沙熱塔什碳酸鹽巖-細(xì)碎屑巖型鉛鋅礦床為研究的重點(diǎn),基于ASTER和landsat-8 OLI影像數(shù)據(jù),綜合研究與碳酸鹽巖-細(xì)碎屑巖型鉛鋅礦床密切相關(guān)的含礦建造、斷裂構(gòu)造、巖漿巖等成礦作用以及礦化有關(guān)的圍巖蝕變與成礦的關(guān)系,借助ASTER影像數(shù)據(jù),對(duì)比分析研究區(qū)內(nèi)典型礦物的波譜曲線特征,以地質(zhì)特征和波譜曲線特征進(jìn)行了典型礦床(沙熱塔什鉛鋅礦)以及沙熱塔什一帶進(jìn)行詳細(xì)的遙感信息的提取,從而建立研究區(qū)遙感找礦標(biāo)志和信息提取的遙感找礦模型,在系統(tǒng)分析典型礦床(沙熱塔什鉛鋅礦)以及區(qū)域地質(zhì)背景的基礎(chǔ)上,利用landsat-8 OLI遙感影像數(shù)據(jù)對(duì)研究區(qū)的線性構(gòu)造進(jìn)行了系統(tǒng)的解譯,借助地理信息系統(tǒng)(Geographic Information System),將研究區(qū)內(nèi)與成礦密切相關(guān)的遙感找礦信息(巖性、構(gòu)造和蝕變)提取以及集成,最終在研究區(qū)范圍內(nèi)圈定找礦遠(yuǎn)景區(qū),以期為區(qū)域礦產(chǎn)勘查部署工作奠定了基礎(chǔ)。本文主要的成果和認(rèn)識(shí)如下:(1)根據(jù)ASTER影像數(shù)據(jù)和已有地質(zhì)礦產(chǎn)勘查找礦新成果等前人資料,確定沙熱塔什鉛鋅礦床的主要礦化蝕變類型,通過(guò)比值、主成分方法進(jìn)行蝕變信息提取研究,提取結(jié)果顯示碳酸鹽化出露的高值區(qū)與現(xiàn)有碳酸鹽地層出露吻合度較高,同時(shí)與鐵染高值區(qū)具有較高程度的吻合作為找礦最佳指示,以此作為遙感找礦模型。(2)利用經(jīng)過(guò)圖形融合等處理的landsat-8 OLI影像數(shù)據(jù),在沙熱塔什一帶對(duì)基礎(chǔ)地質(zhì)信息進(jìn)行初步的目視判譯工作,通過(guò)野外調(diào)研對(duì)解譯標(biāo)志進(jìn)一步補(bǔ)充和修正,其中在區(qū)域內(nèi)北西向構(gòu)造最發(fā)育,次級(jí)斷裂主要為北東向、近南北向、這些與區(qū)域主斷裂斜交的次級(jí)斷裂更有利成礦。(3)對(duì)遙感和傳統(tǒng)地質(zhì)數(shù)據(jù)進(jìn)行統(tǒng)一分析,各種信息圖層在ArcGIS平臺(tái)上進(jìn)行集成,得到研究區(qū)蝕變、構(gòu)造密度圖等區(qū)域遙感找礦信息,結(jié)合地質(zhì)特征和前人研究成果,圈定了2個(gè)碳酸鹽巖-細(xì)碎屑巖成礦遠(yuǎn)景區(qū),與新疆地礦局第二地質(zhì)大隊(duì)2006年在烏恰縣沙熱塔什研究區(qū)劃定的找礦遠(yuǎn)景區(qū)基本相符,為沙熱塔什一帶找礦工作開(kāi)展了有益的嘗試。
[Abstract]:The Shagetash lead-zinc deposit is located in the northwestern margin of Tarim Basin and the Cenozoic intracontinental basin in the northwestern margin of the Tarim Basin. The ore-forming belt belongs to the Fe-Cu-Pb-Zn-Sn-bauxite ore belt in Kuokeshalling, and its periphery shows a good prospecting prospect. By studying the regional metallogenic geological background, ore-controlling elements and metallogenic regularity, the metallogenic belt belongs to the stratified lead-zinc metallogenic belt in the northwestern margin of Tarim. Based on the geological data and data obtained, the remote sensing prospecting criteria were extracted from the geological background of the dominant mineral deposits, and a remote sensing prospecting model was established, which was verified by remote sensing. The model of remote sensing prospecting is revised and the remote sensing prospecting area is delineated. This paper takes the area of Shagetash, Wuqixian, Xinjiang as the research area, and combines with the existing regional geological and mineral survey project data. Based on ASTER and landsat-8 OLI image data, the ore-bearing formations and fracture structures closely related to carbonatite-fine clastic type lead-zinc deposits are studied, which are mainly focused on the Saratash carbonate and fine clastic rock type lead-zinc deposits, and based on the ASTER and landsat-8 OLI image data. With the help of ASTER image data, the characteristics of wave spectrum curves of typical minerals in the study area are compared and analyzed. Based on the geological characteristics and spectral curve characteristics, the detailed remote sensing information of typical deposits (Shagetash lead-zinc deposit) and the area of Sagatash are extracted, and a remote sensing prospecting model of remote sensing prospecting marks and information extraction in the study area is established. Based on the systematic analysis of typical deposits (Shagetash lead-zinc deposit) and regional geological background, the linear structure of the studied area is systematically interpreted by using landsat-8 OLI remote sensing image data. With the help of Information system, the remote sensing prospecting information (lithology, structure and alteration), which is closely related to ore-forming, is extracted and integrated in the study area. In order to lay a foundation for the regional mineral exploration and deployment, the main achievements and understandings of this paper are as follows: 1) based on the ASTER image data and the existing new achievements in geological and mineral exploration and prospecting, etc. The main mineralization alteration types of Shagetash lead-zinc deposit are determined. The alteration information is extracted by ratio and principal component method. The results show that the high value area of carbonate outcrop is in good agreement with the existing carbonate strata. At the same time, it has a high degree of agreement with the high value area of iron stain as the best indicator for prospecting, which is used as the remote sensing prospecting model. (2) using the landsat-8 OLI image data processed by image fusion and so on. A preliminary visual interpretation of the basic geological information was carried out in the area of Sagatash, and the interpretation marks were further supplemented and corrected through field investigations. Among them, the NW trending structure is the most developed in the region, and the secondary faults are mainly NNE and NNE. These secondary faults, which are oblique with the regional main faults, are more favorable for the analysis of remote sensing and traditional geological data. The information layers are integrated on the ArcGIS platform to obtain the regional remote sensing prospecting information such as alteration, tectonic density map, etc. Combined with geological characteristics and previous research results, two carbonate rock-fine clastic rock metallogenic scenic spots have been delineated, which are basically in line with the prospecting areas designated by the second Geological Group of the Xinjiang Geology and Mining Bureau in the Shagetash research area of Wuqia County on 2006. A useful attempt has been made for prospecting in the area of Saratash.
【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】：2017
【分類號(hào)】：P627

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