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利用Google Earth研究構(gòu)造對喀斯特地貌的控制和對碳酸鹽巖巖系風(fēng)化成土的影響
摘要： 通過互聯(lián)網(wǎng)Google Earth歐洲衛(wèi)星圖像資料的觀察,發(fā)現(xiàn)貴州喀斯特地區(qū)碳酸鹽巖風(fēng)化成土能力與地層巖性、構(gòu)造和地貌等密切相關(guān).二疊系生物礁石漠化顯著,成土能力差;三疊系大冶組薄層灰?guī)r成土能力高,很少有石漠化;地層傾角大的碳酸鹽巖區(qū),石漠化不顯著;地層平緩的碳酸鹽巖區(qū),石漠化強(qiáng)或中等,碳酸鹽巖風(fēng)化成土能力中等.另外,大型節(jié)理帶對碳酸鹽巖風(fēng)化成土具有明顯的控制作用,節(jié)理帶碳酸鹽巖溶蝕相對強(qiáng)烈,常形成低洼地形,碳酸鹽巖風(fēng)化成土速率較高,紅粘土堆積相對厚,不容易石漠化;而節(jié)理帶間的區(qū)域往往地形較高,是石漠化易發(fā)育的區(qū)域. Abstract： The landscape of Guizhou Province was observed by the Google Earth System(2007 Europa Teehnologies image)in internet,revealing close relationship among karst morphology and carbonate-derived laterite and lithology and tectonics from the digital images.The digital image of Permian reef limestone in Luodian County,southern Guizhou shows strong rocky desertifieation,and carbonate-derived laterite is low in pedogenesis.The digital image of thin limestone of the Triassic Daye Formation shows low rocky desertification,and carbonate-derived laterite is very high in pedogenesis.The high dip angle(>40°)carbonate area shows weak rocky desertifieation.and the lower dip angle(<10°)carbohate area shows middle tO strong carbonate laterite,the rocky desertification is middle to serious.The carbonate solution and laterite are very high long the large joint zone in the carbonate area,a series of depressions was developed along the large joint zone.Additionally,strong carbonate-derived laterite toke place in the depression zone,and a lot of soil was deposited in the depression zone.Theretore,carbonate-derived laterite is low on the upland between the depression zones,and the rocky desertification is serious. 作 者： 楊瑞東 魏曉 文雪峰 盛學(xué)庸 YANG Rui-dong WEI Xiao WEN Xue-feng SHENG Xue-yong 作者單位： 楊瑞東,魏曉,文雪峰,YANG Rui-dong,WEI Xiao,WEN Xue-feng(貴州大學(xué),貴陽,550025)盛學(xué)庸,SHENG Xue-yong(貴州地質(zhì)礦產(chǎn)局,貴陽,550004)
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