干旱区生态环境知识资源中心(Arid): Mapping hydrothermal alteration zone through aster data in Gadag Schist Belt of Western Dharwar Craton of Karnataka, India

Arid

DOI	10.1007/s12665-020-09269-9
	Mapping hydrothermal alteration zone through aster data in Gadag Schist Belt of Western Dharwar Craton of Karnataka, India
	Rani, Nisha; Singh, Tejpal; Mandla, Venkata Ravibabu
通讯作者	Mandla, VR
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2020
卷号	79 期号:24
英文摘要	Alteration zones are developed in a wide range of geological milieus such as volcano-plutonic rocks. Hydrothermal alteration zones are considered an important guide for mineral exploration and can act as a potential zone of mineralization. The minerals in alteration zones have very diagnostic absorption features in visible-near infrared (VNIR) and shortwave infrared (SWIR) regions of the electromagnetic spectrum. The Advanced Space-borne Thermal Emission and Reflection Radiometer (ASTER) data have the potential to identify mineral assemblages in different hydrothermal alteration zones because of its 14 spectral bands which cover a wide spectral range. In the present article, FCC, band ratio, and SPCA techniques were applied to map the hydrothermal alteration zones in Gadag Schist Belt (GSB) of Western Dharwar Craton (WDC) of Karnataka. FCC has highlighted lithology, alteration zones, and given a fair idea about the lithological control and alteration occurrences in the area. Band ratio technique for muscovite, kaolinite, chlorite, iron oxide gossan, and silica alteration have yielded promising results. SPCA analysis successfully mapped hydrothermal alteration and delineated phyllic, argillic, and propylitic zones in the area. These results were verified through the existing geological map and by geological fieldwork in the area and these results are satisfactory. The total area, altered by different alteration process, was also calculated. In the GSB, iron alteration zone, phyllic, argillic, propylitic, and silica alteration zones were effectively mapped with the help of ASTER data.
英文关键词	Phyllic Argillic Propylitic Hydrothermal Alteration Mineral exploration
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000595344400002
WOS关键词	PRINCIPAL COMPONENT ANALYSIS ; ALTERATION MINERALS ; INFORMATION EXTRACTION ; MAGMATIC ARC ; LANDSAT TM ; EXPLORATION ; IMAGERY ; IDENTIFICATION ; DEPOSITS ; DESERT
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327824
作者单位	[Rani, Nisha] Geol Survey India Training Inst GSITI, Hyderabad 500068, India; [Singh, Tejpal] CSIR Cent Sci Instruments Org, Sect 30C, Chandigarh 160030, India; [Mandla, Venkata Ravibabu] Govt India, Minist Rural Dev, Natl Inst Rural Dev & Panchayati Raj NIRDPR, Ctr Geoinformat Applicat Rural Dev CGARD, Hyderabad 500030, TS, India
推荐引用方式 GB/T 7714	Rani, Nisha,Singh, Tejpal,Mandla, Venkata Ravibabu. Mapping hydrothermal alteration zone through aster data in Gadag Schist Belt of Western Dharwar Craton of Karnataka, India[J],2020,79(24).
APA	Rani, Nisha,Singh, Tejpal,&Mandla, Venkata Ravibabu.(2020).Mapping hydrothermal alteration zone through aster data in Gadag Schist Belt of Western Dharwar Craton of Karnataka, India.ENVIRONMENTAL EARTH SCIENCES,79(24).
MLA	Rani, Nisha,et al."Mapping hydrothermal alteration zone through aster data in Gadag Schist Belt of Western Dharwar Craton of Karnataka, India".ENVIRONMENTAL EARTH SCIENCES 79.24(2020).