干旱区生态环境知识资源中心(Arid): Fluvial response to climate change inferred from sediment cores from the Ghaggar-Hakra paleochannel in NW Indo-Gangetic plains

Arid

DOI	10.1016/j.palaeo.2019.109247
	Fluvial response to climate change inferred from sediment cores from the Ghaggar-Hakra paleochannel in NW Indo-Gangetic plains
	Singh, Ajit 1,2; Sinha, Rajiv 1
通讯作者	Singh, Ajit
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2019
卷号	532
英文摘要	In the Indo-Gangetic plains (IGP), the inter-basinal area between the Ganga in east and the Indus in west is currently devoid of any major drainage. A wide paleochannel belt, the Ghaggar-Hakra channel, has been mapped in this region. Our previous studies along with others established that a large Himalayan river flowed through this paleochannel, and a large-scale drainage reorganisation occurred during the last 10 ka. This follow-up study presents sedimentary facies and chrono-stratigraphy of the alluvial deposits from the Ghaggar-Hakra paleochannel (1) to understand the depositional environments of the river system; (2) to reconstruct aggradation/incision history and stratigraphic development, and (3) to understand fluvial response to climate change at a regional scale. Sediment cores (35-50 m) across the length and width of the paleochannel, and optically stimulated luminescence (OSL) based chronology are used to reconstruct alluvial stratigraphy developed during marine isotope stage (MIS) 5-1. Twelve sedimentary facies identified in the cores characterize floodplain, channel, and aeolian depositional settings. Four stratigraphic units were identified; the oldest Unit 1 (> 150 ka) representing aeolian deposition disconformably underlies the younger Units 2 to 4 that represent four periods of fluvial aggradation (and incision). Period I (similar to 86-64 ka) comprises coarse grained grey micaceous channel sand, and period II (similar to 62-30 ka) shows transition to fine to medium channel sand interlayered with yellow mud of floodplain deposition. Period III (similar to 25-12 ka) comprised of fine grained grey micaceous channel sand and very fine deposits of channel margin settings. Period IV (similar to 11-4.0 ka) marks the termination of flow from the large Himalayan river, the Sutlej, into the Ghaggar-Hakra system and fluvial sequence in this period, red brown silty clay, represents modern Ghaggar deposits. We suggest a strong climatic control on the stratigraphic development in this region based on the available proxy records. We further compare our stratigraphic data with that of the IGP and the adjoining western Indian rivers for understanding the regional-scale fluvial response to monsoonal fluctuations.
英文关键词	Alluvial deposits Sedimentary facies Kalibangan Valley civilization OSL dating Buried river
类型	Article
语种	英语
国家	India
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000484871600003
WOS关键词	INDIAN-SUMMER MONSOON ; LATE QUATERNARY ; THAR DESERT ; LUMINESCENCE CHRONOLOGY ; PEDOGENIC CARBONATES ; SARASWATI RIVER ; SOUTHERN MARGIN ; ASIAN MONSOON ; AGGRADATION ; BASIN
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217871
作者单位	1.Indian Inst Technol Kanpur, Dept Earth Sci, Kanpur, Uttar Pradesh, India; 2.Indian Inst Technol Gandhinagar, Discipline Earth Sci, Gandhinagar, India
推荐引用方式 GB/T 7714	Singh, Ajit,Sinha, Rajiv. Fluvial response to climate change inferred from sediment cores from the Ghaggar-Hakra paleochannel in NW Indo-Gangetic plains[J],2019,532.
APA	Singh, Ajit,&Sinha, Rajiv.(2019).Fluvial response to climate change inferred from sediment cores from the Ghaggar-Hakra paleochannel in NW Indo-Gangetic plains.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,532.
MLA	Singh, Ajit,et al."Fluvial response to climate change inferred from sediment cores from the Ghaggar-Hakra paleochannel in NW Indo-Gangetic plains".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 532(2019).