干旱区生态环境知识资源中心(Arid): The geochemical and pedogenic signatures of Shantisagara lake sediments, southern India: Implications for weathering, terrigenous influx, and provenance during the Holocene

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DOI	10.1002/gj.4388
	The geochemical and pedogenic signatures of Shantisagara lake sediments, southern India: Implications for weathering, terrigenous influx, and provenance during the Holocene
	Sandeep, Kizhur; Shankar, Rajasekhariah; Warrier, Anish Kumar; Aravind, Geetha Hariendranath
通讯作者	Sandeep, K (corresponding author)，Cent Univ Kerala, Dept Geol, Sch Earth Sci Syst, Periye PO,Tejaswini Hills, Kasaragod 671320, Kerala, India.
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2022-01
英文摘要	This study aims to determine variations in the terrigenous influx, the intensity of chemical weathering, pedogenic activity, and provenance of Shantisagara lake sediments in southern India for the past 11,000 years reconstructed using geochemical and magnetic susceptibility data. The results showed that K/Al, Fe/Al, Ti/Al, and Zn/Al ratios exhibited significant down-core variations, whereas P/Al, Pb/Al, Na/Al, Cu/Al, and Ba/Al display steady values. The sediments have resulted from moderate to intense degree of chemical weathering and show high compositional maturity. The discrimination function diagrams, Al2O3/TiO2 and K2O/Na2O values, point towards a change from an intermediate source during the Early- and Mid-Holocene to a felsic one during the Late Holocene. The similar LREE-enriched chondrite-normalized REE patterns indicate no significant change. The Early Holocene phase was characterized by a moderate influx of fine detrital fraction with a peak around 10,500 cal. Years B.P. The pedogenesis was strong in the catchment area during this period, with oxic conditions prevailing in the lake. The catchment area experienced moderate to high rainfall during this period. A fluctuating trend of terrigenous influx and chemical weathering is documented during similar to 8,000-4,000 cal. Years B.P. period in response to variable rainfall. Decreasing rainfall trends are observed during 4,000-2,000 cal. Years B.P., with a slight increase from 2,000 cal. Years B.P. to the Present. Anoxic conditions were present in the lake during the Middle- and Late Holocene with low pedogenic activity in the catchment.
英文关键词	CBD extraction chemical weathering palaeomonsoon pedogenic magnetite provenance southern India
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000741956400001
WOS关键词	MAGNETIC-SUSCEPTIBILITY ; LACUSTRINE SEDIMENTS ; THAR DESERT ; NORTH CHINA ; CHEMISTRY ; CLIMATE ; RECORD ; RECONSTRUCTION ; VARIABILITY ; EVOLUTION
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/2XILL650/377140
作者单位	[Sandeep, Kizhur; Shankar, Rajasekhariah; Warrier, Anish Kumar; Aravind, Geetha Hariendranath] Mangalore Univ, Dept Marine Geol, Mangalagangothri, India; [Sandeep, Kizhur; Aravind, Geetha Hariendranath] Cent Univ Kerala, Dept Geol, Sch Earth Sci Syst, Periye PO,Tejaswini Hills, Kasaragod 671320, Kerala, India; [Warrier, Anish Kumar] Manipal Acad Higher Educ, Ctr Climate Studies, Dept Civil Engn, Manipal Inst Technol, Manipal, Karnataka, India
推荐引用方式 GB/T 7714	Sandeep, Kizhur,Shankar, Rajasekhariah,Warrier, Anish Kumar,et al. The geochemical and pedogenic signatures of Shantisagara lake sediments, southern India: Implications for weathering, terrigenous influx, and provenance during the Holocene[J],2022.
APA	Sandeep, Kizhur,Shankar, Rajasekhariah,Warrier, Anish Kumar,&Aravind, Geetha Hariendranath.(2022).The geochemical and pedogenic signatures of Shantisagara lake sediments, southern India: Implications for weathering, terrigenous influx, and provenance during the Holocene.GEOLOGICAL JOURNAL.
MLA	Sandeep, Kizhur,et al."The geochemical and pedogenic signatures of Shantisagara lake sediments, southern India: Implications for weathering, terrigenous influx, and provenance during the Holocene".GEOLOGICAL JOURNAL (2022).