Lithological discrimination of the mafic-ultramafic complex, Huitongshan, Beishan, China: Using ASTER data

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 自然资源与环境安全研究部 > 环境修复与资源工程研究室 > SCI/SSCI期刊论文

	Lithological discrimination of the mafic-ultramafic complex, Huitongshan, Beishan, China: Using ASTER data
	Jiang D.; Zhuang D. F.
	2014
关键词	mafic-ultramafic complex ASTER data band ratio minimum noise fraction mafic index principal component analysis spaceborne thermal emission reflection radiometer aster mineral-resources west junggar field data area ophiolite xinjiang
英文摘要	The Beishan area has more than seventy mafic-ultramafic complexes sparsely distributed in the area and is of a big potential in mineral resources related to mafic-ultramafic intrusions. Many mafic-ultramafic intrusions which are mostly in small sizes have been omitted by previous works. This research takes Huitongshan as the study area, which is a major district for mafic-ultramafic occurrences in Beishan. Advanced spaceborne thermal emission and reflection radiometer (ASTER) data have been processed and interpreted for mapping the mafic-ultramafic complex. ASTER data were processed by different techniques that were selected based on image reflectance and laboratory emissivity spectra. The visible near-infrared (VNIR) and short wave infrared (SWIR) data were transformed using band ratios and minimum noise fraction (MNF), while the thermal infrared (TIR) data were processed using mafic index (MI) and principal components analysis (PCA). ASTER band ratios (6/8, 5/4, 2/1) in RGB image and MNF (1, 2, 4) in RGB image were powerful in distinguishing the subtle differences between the various rock units. PCA applied to all five bands of ASTER TIR imagery highlighted marked differences among the mafic rock units and was more effective than the MI in differentiating mafic-ultramafic rocks. Our results were consistent with information derived from local geological maps. Based on the remote sensing results and field inspection, eleven gabbroic intrusions and a pyroxenite occurrence were recognized for the first time. A new geologic map of the Huitongshan area was created by integrating the results of remote sensing, previous geological maps and field inspection. It is concluded that the workflow of ASTER image processing, interpretation and ground inspection has great potential for mafic-ultramafic rocks identifying and relevant mineral targeting in the sparsely vegetated arid region of northwestern China.
出处	Journal of Earth Science
卷	25
期	3
页	529-536
收录类别	SCI
语种	英语
ISSN号	1674-487X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29728]
专题	资源利用与环境修复重点实验室_资源地理与国土资源研究室_SCI/SSCI期刊论文中国科学院地理科学与资源研究所
推荐引用方式 GB/T 7714	Jiang D.,Zhuang D. F.. Lithological discrimination of the mafic-ultramafic complex, Huitongshan, Beishan, China: Using ASTER data. 2014.