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学科主题: Remote Sensing; Imaging Science & Photographic Technology
题名: Remote sensing research in biogeochemistry of the Hetai gold deposit, Guangdong Province, China
作者: Xu, RS ; Ma, YL
刊名: INTERNATIONAL JOURNAL OF REMOTE SENSING
发表日期: 2004
卷: 25, 期:2, 页:437-453
收录类别: sci
部门归属: Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
项目归属: 海洋地质
摘要: The vegetation has been poisoned by Au in the Hetai gold deposit region, Guangdong Province, China. The Au content in the leaves of plants is up to 269 times higher than that of the abundance, the chlorophyll content is 10-30% lower than that of the vegetation in metamorphic terrains, and 10-20% higher than that in granite terrains. The carotenoid content is 10-44% lower than the background value. The Au content in the chlorophyll is up to 97 times higher than the abundance; the Fe and Mg of the pigment is 60% and 1.4-8.6% of the abundance. The water content in leaves is 10-20% lower than the background value. The temperature of the leaf surface is 8% lower than the background value. Cells of leaves are deformed and broken. The leaf surface shows yellow or dark green spots. Spectral reflectance of the leaf surface is 5-30% higher than the background value; the spectral shape has shifted 5-15 nm to the short wavelength in the 300-800 nm band, and to the long wavelength in the 800-2500 nm band. The greyscale values of the canopy in images from Landsat Thematic (TM) and Airborne Imaging Scanner (AIS) are 10-100% higher than the background value. On Landsat TM and AIS false colour images, plants poisoned by Au display a yellow colour, which distinguishes them from background plants. According to the spectral and image features of Au biogeochemical effects, a gold deposit information system has been constructed, and thus more than 20 gold deposit target areas have been identified rapidly, economically and accurately in Northeast China, Northwest China, South China and the Qinling mountain range in China, which is covered extensively by vegetation.
原文出处: 查看原文
WOS记录号: WOS:000187629800011
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4834
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Xu, RS; Ma, YL.Remote sensing research in biogeochemistry of the Hetai gold deposit, Guangdong Province, China,INTERNATIONAL JOURNAL OF REMOTE SENSING,2004,25(2):437-453
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