高分辨率遙感在西藏羅布莎地區(qū)地質調查中的應用
發(fā)布時間:2018-08-13 19:16
【摘要】:研究區(qū)位于西藏羅布莎地區(qū),其羅布莎蛇綠巖體蘊藏著我國目前規(guī)模最大的鉻鐵礦床。以WorldView-2高空間分辨率遙感數(shù)據為基本信息源,對研究區(qū)進行遙感地質解譯。與傳統(tǒng)多光譜數(shù)據ETM+、ASTER等相比,WorldView-2具有更高的空間分辨率和相對較窄且連續(xù)的光譜。對研究區(qū)WorldView-2圖像進行正射校正、大氣校正和影像融合后,采用最佳指數(shù)法選擇8-6-4波段組合進行假彩色合成,同時結合真彩色5-3-2波段,突出各地質體單元色調差異。我們利用其空間分辨率優(yōu)勢建立區(qū)內主要巖性和構造的高空間分辨率遙感解譯標志。通過野外地質驗證,解譯結果充分顯示了WorldView-2高分辨率影像在海拔較高、工作環(huán)境惡劣地區(qū)進行礦產資源勘查的技術優(yōu)勢和應用前景。
[Abstract]:The study area is located in the Luobusa area of Tibet, and its robusa ophiolite deposit contains the largest chromite deposit in China at present. Taking WorldView-2 high spatial resolution remote sensing data as the basic information source, the remote sensing geological interpretation of the study area is carried out. Compared with the conventional multispectral data, ETM / ASTER has a higher spatial resolution and a relatively narrow and continuous spectrum. After positive emendation, atmospheric correction and image fusion of WorldView-2 images in the study area, the best exponent method was used to select 8-6-4 band combination for pseudocolor synthesis, and the true color 5-3-2 band was combined to highlight the hue differences of plastid units in different regions. We make use of its spatial resolution advantage to establish the high spatial resolution remote sensing interpretation mark of the main lithology and structure in the area. Through the field geological verification, the interpretation results fully show the technical advantages and application prospects of WorldView-2 high-resolution images in the areas of high altitude and poor working environment for mineral resources exploration.
【作者單位】: 中國地質大學(北京)地球科學與資源學院;中國地質大學地質過程與礦產資源國家重點實驗室;西藏自治區(qū)地質礦產勘查開發(fā)局第二地質大隊;山東省地礦工程勘察院;
【基金】:中國地質調查局發(fā)展研究中心項目(121201004000150017-101)
【分類號】:P627
[Abstract]:The study area is located in the Luobusa area of Tibet, and its robusa ophiolite deposit contains the largest chromite deposit in China at present. Taking WorldView-2 high spatial resolution remote sensing data as the basic information source, the remote sensing geological interpretation of the study area is carried out. Compared with the conventional multispectral data, ETM / ASTER has a higher spatial resolution and a relatively narrow and continuous spectrum. After positive emendation, atmospheric correction and image fusion of WorldView-2 images in the study area, the best exponent method was used to select 8-6-4 band combination for pseudocolor synthesis, and the true color 5-3-2 band was combined to highlight the hue differences of plastid units in different regions. We make use of its spatial resolution advantage to establish the high spatial resolution remote sensing interpretation mark of the main lithology and structure in the area. Through the field geological verification, the interpretation results fully show the technical advantages and application prospects of WorldView-2 high-resolution images in the areas of high altitude and poor working environment for mineral resources exploration.
【作者單位】: 中國地質大學(北京)地球科學與資源學院;中國地質大學地質過程與礦產資源國家重點實驗室;西藏自治區(qū)地質礦產勘查開發(fā)局第二地質大隊;山東省地礦工程勘察院;
【基金】:中國地質調查局發(fā)展研究中心項目(121201004000150017-101)
【分類號】:P627
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