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DOI	10.1016/j.palaeo.2019.01.003
	Aeolian accumulation: An alternative origin of laterite on the Deccan Plateau; India
	Liu X.; Mao X.; Yuan Y.; Ma M.
发表日期	2019
ISSN	0031-0182
起始页码	34
结束页码	44
卷号	518
英文摘要	Laterite is ubiquitous in India and has been extensively studied. However, it is still controversial with respect to its origin, definition, classification, and implications in paleoclimate, tectonic history and topography evolution. Of those, the origin of laterite, either in situ weathering of protoliths or weathering of allochthonous input, is the most critical to address. The ca. 25-m-thick laterite (duricrust) capping the Deccan Plateau is conventionally hypothesized to derive from in situ weathering of the topmost basalt. However, this thick laterite lacks upward progressive weathering which is characteristic of lateritic profile. Instead, it displays: 1) homogeneity in weathering intensity through the duricrust; 2) a clear unconformable contact of laterite with red clay, which together suggests that this thick laterite is genetically unrelated to in situ weathering of the topmost basalt. Lines of evidence in mineralogy, granularity, and geochemistry proved the disconnection between this laterite and basalt, and in contrast, indicated its correlation to aeolian accumulation. In this study the laterite together with the red clay was proposed to derive from aeolian dust accumulation and weathering since 65 Ma within context of Indian plate drifting across the equator from southern to northern hemisphere. © 2019
英文关键词	Basalt; Geochemistry; Grain size; Red clay; Weathering
语种	英语
scopus关键词	basalt; chemical weathering; clay soil; eolian deposit; geochemistry; grain size; Indian plate; laterite; Northern Hemisphere; paleoclimate; protolith; red soil; Southern Hemisphere; Deccan; India
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151071
作者单位	Institute of Geography, Fujian Normal University, Fuzhou, 350007, China; State Key Laboratory of Subtropical Mountain Ecology (Funded by Ministry of Science and Technology and Fujian Province), Fujian Normal University, Fuzhou, 350007, China; Department of Environment and Geography, Macquarie University, Sydney, NSW 2109, Australia; College of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
推荐引用方式 GB/T 7714	Liu X.,Mao X.,Yuan Y.,et al. Aeolian accumulation: An alternative origin of laterite on the Deccan Plateau; India[J],2019,518.
APA	Liu X.,Mao X.,Yuan Y.,&Ma M..(2019).Aeolian accumulation: An alternative origin of laterite on the Deccan Plateau; India.Palaeogeography, Palaeoclimatology, Palaeoecology,518.
MLA	Liu X.,et al."Aeolian accumulation: An alternative origin of laterite on the Deccan Plateau; India".Palaeogeography, Palaeoclimatology, Palaeoecology 518(2019).