本文選題：遙感地質(zhì)解譯 + 蝕變信息提取　； 參考：《新疆大學(xué)》2015年碩士論文

【摘要】：達(dá)坂城冰草溝一帶地處準(zhǔn)噶爾微板塊與塔里木板塊拼接地帶北側(cè)的博格達(dá)弧后拉張盆地,屬于北天山鈾成礦褶皺帶博格達(dá)復(fù)背斜南翼,成礦條件得天獨(dú)厚,成礦潛力巨大。但由于自然氣候條件和地形條件較差,給鈾礦地質(zhì)礦產(chǎn)勘查工作造成了極大的困難,至今該區(qū)仍是鈾礦地質(zhì)礦產(chǎn)勘查程度較低的地區(qū)。本文以1:10萬及鄰區(qū)1:5萬區(qū)域地質(zhì)礦產(chǎn)調(diào)查成果資料為基礎(chǔ),運(yùn)用遙感技術(shù),利用ENVI、ERDAS、PCI等數(shù)據(jù)處理軟件,對原始遙感數(shù)據(jù)進(jìn)行預(yù)處理工作,為1:5萬遙感地質(zhì)解譯與蝕變信息提取工作提供基礎(chǔ)數(shù)據(jù)。本次研究成果可為野外合理部署工作量和工作重點(diǎn)提供依據(jù),繼而減少野外工作量,縮短工作時(shí)間,降低資金投入,有效地提高填圖精度和質(zhì)量。在達(dá)坂城冰草溝一帶1:5萬遙感地質(zhì)解譯過程中,將WorldView-2數(shù)據(jù)(分辨率0.5 m)與ETM+數(shù)據(jù)(多波段)配合使用,采用了幾何校正、圖像鑲嵌、線性對比度拉伸、分辨率融合等一系列遙感圖像增強(qiáng)處理方法,擴(kuò)大了不同地質(zhì)體間的反差,提高了遙感影像的可解譯程度。根據(jù)遙感圖像中巖性、地質(zhì)體界線和地質(zhì)構(gòu)造的可識(shí)別程度,將研究區(qū)的遙感圖像按照解譯程度劃分為三個(gè)等級(jí)。運(yùn)用遙感圖像目視解譯方法原則,劃分出本區(qū)內(nèi)7個(gè)地層解譯單元及4個(gè)巖體解譯單元,根據(jù)野外路線地質(zhì)調(diào)查的結(jié)果,建立并完善各自的遙感解譯標(biāo)志,同時(shí)借助計(jì)算機(jī)處理方法輔助解譯,編制出達(dá)坂城冰草溝一帶1:5萬遙感地質(zhì)解譯圖,解譯結(jié)果和精度符合工作要求。采用“去干擾異常主分量門限化技術(shù)”,提取了研究區(qū)的“羥基”和“鐵染”蝕變信息。利用ArcGIS平臺(tái)數(shù)據(jù)集成的優(yōu)勢特點(diǎn),將研究區(qū)蝕變信息、構(gòu)造信息進(jìn)行疊加,結(jié)合成礦帶內(nèi)典型礦床的控礦因素方面的分析,圈定了找礦潛力區(qū),為下一步找礦工作指明了方向。
[Abstract]:Located in the northern side of the Junggar micro-plate and Tarim plate, the Bogda back-arc extensional basin is located in the area of Bingcaogou, Dabancheng. It belongs to the southern wing of the Bogda complex anticline in the North Tianshan uranium metallogenic fold belt. The metallogenic conditions are unique and the metallogenic potential is great. However, because of the poor natural climatic and topographic conditions, it has caused great difficulties to the exploration of uranium geology and mineral resources. Up to now, this area is still a low degree of uranium geological and mineral exploration area. Based on the results of geological and mineral survey of 1: 100,000 and adjacent areas of 1: 50, 000, this paper uses remote sensing technology and data processing software such as ENVIERDAS PCI to preprocess raw remote sensing data. It provides basic data for geological interpretation and alteration information extraction of 1: 50,000 remote sensing. The results of this study can provide the basis for the rational deployment of the workload and work emphasis in the field, and then reduce the workload in the field, shorten the working time, reduce the investment of funds, and effectively improve the mapping accuracy and quality. In the process of remote sensing geological interpretation of 1: 50,000 remote sensing in the Bingcaogou area of Dabancheng, the WorldView-2 data (0.5 m resolution) is used in conjunction with ETM data (multi-band). Geometric correction, image mosaic and linear contrast stretching are used. A series of remote sensing image enhancement methods such as resolution fusion expand the contrast between different geological bodies and improve the interpretation degree of remote sensing images. According to the lithology of remote sensing image, the boundary of geological body and the recognizable degree of geological structure, the remote sensing image of the study area can be divided into three grades according to the interpretation degree. Based on the principle of visual interpretation of remote sensing images, seven stratigraphic interpretation units and four rock mass interpretation units in this area are divided. Based on the results of field geological survey, remote sensing interpretation marks are established and perfected. At the same time, with the aid of computer processing method, the 1: 50 000 remote sensing geological interpretation map of Bingcaogou area of Dabancheng is compiled. The interpretation results and accuracy meet the requirements of the work. The "hydroxyl" and "iron stain" alteration information in the study area were extracted by using the "de-interference principal component threshold technique". Based on the advantages of ArcGIS platform data integration, the study area alteration information and structural information are superimposed. Combined with the analysis of ore-controlling factors of typical ore deposits in the metallogenic belt, the prospecting potential area is delineated, and the direction for the next prospecting work is pointed 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
【分類號(hào)】：P619.14

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本文編號(hào)：2040012