干旱区生态环境知识资源中心(Arid): Weathering pattern of amphibolites in the different climate zones from Western Dharwar Craton, Southern India

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DOI	10.1007/s12517-021-08595-x
	Weathering pattern of amphibolites in the different climate zones from Western Dharwar Craton, Southern India
	Mehta, Pankaj; Malviya, Vivek P.
通讯作者	Mehta, P (corresponding author), Cent Univ Jammu, Dept Environm Sci, Jammu 181143, Jammu & Kashmir, India.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2021
卷号	14 期号:22
英文摘要	A climatic transition of humid to arid conditions from west to east on the Western Dharwar Craton, southern India provided a suitable setting to understand the relative role of chemical vs. physical weathering of amphibolites. Weathering pattern of amphibolites was studied from two locations in humid climatic zone and two locations in semi-arid zone. The purpose of the present study is to evaluate the relative importance of structural features in rocks and rainfall in the extent of chemical weathering based on mobilization of elements and mineralogical variations. Under conditions of humid climate with good vegetation and relief bedrock physical features (all interconnected complex system) become less important and biota becomes more important. Biological activity and relief together made weathering solutions acidic under humid conditions. Under semi-arid conditions, weathering solutions normally remained alkaline; however, microbially mediated acidity prevailed in the microzones of weathering profile. In the humid zones, the immobile or less mobile chemical elements, Ce and Ti, and to a less extent Fe and Ba show high degree coherence by strongly enriching in the most weathered products, whereas the REEs are mobile in both conditions. There is significant loss of HREE resulting in fractionated patterns, relative to the parent rock, only under humid conditions, in the weathered products. The present study of weathering has shown that local geological features in a rock become important to the nature and extent of weathering under semi-arid condition by creating zones of aridity and humidity on the outcrop scale.
英文关键词	Weathering Structural inhomogeneities Climate Elemental mobility Rare earth elements
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000718011600011
WOS关键词	KAVERI RIVER CATCHMENT ; GEOCHEMISTRY ; EVOLUTION ; MINERALS ; DISSOLUTION ; MOVEMENTS ; GNEISSES ; IMPACT ; RATES ; CRUST
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373822
作者单位	[Mehta, Pankaj] Cent Univ Jammu, Dept Environm Sci, Jammu 181143, Jammu & Kashmir, India; [Malviya, Vivek P.] Geol Survey India, Mineral Phys Div, Lucknow 226004, Uttar Pradesh, India
推荐引用方式 GB/T 7714	Mehta, Pankaj,Malviya, Vivek P.. Weathering pattern of amphibolites in the different climate zones from Western Dharwar Craton, Southern India[J],2021,14(22).
APA	Mehta, Pankaj,&Malviya, Vivek P..(2021).Weathering pattern of amphibolites in the different climate zones from Western Dharwar Craton, Southern India.ARABIAN JOURNAL OF GEOSCIENCES,14(22).
MLA	Mehta, Pankaj,et al."Weathering pattern of amphibolites in the different climate zones from Western Dharwar Craton, Southern India".ARABIAN JOURNAL OF GEOSCIENCES 14.22(2021).