干旱区生态环境知识资源中心(Arid): Climate-tectonic imprints on the Late Quaternary Ravi River Valley Terraces of the Chamba region in the NW Himalaya

Arid

DOI	10.1016/j.jseaes.2021.104990
	Climate-tectonic imprints on the Late Quaternary Ravi River Valley Terraces of the Chamba region in the NW Himalaya
	Joshi, M.; Thakur, V. C.; Suresh, N.; Sundriyal, Y. P.
通讯作者	Joshi, M (corresponding author), Wadia Inst Himalayan Geol, 33 GMS Rd, Dehra Dun, Uttarakhand, India. ; Joshi, M (corresponding author), GB Pant Natl Inst Himalayan Environm, Sikkim Reg Ctr, Gangtok, India. ; Joshi, M (corresponding author), HNB Garhwal Univ, Srinagar, Uttrakhand, India.
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2022
卷号	223
英文摘要	An attempt has been made to reconstruct the landform evolution in monsoon-dominated the Ravi River Valley (a major tributary of the Indus River), Chamba Nappe, Lesser Himalaya based on detailed field mapping, supported by the Optically Stimulated Luminescence (OSL) dates. In the upper Ravi River Valley sediments are generated by glaciation-paraglaciation processes and accumulated in terraces and alluvial fan deposits in lower reaches north of the Main Central Thrust during deglaciation and periods of intensified monsoonal phases. Field study and OSL dating demonstrate aggradation of river terraces and debris-flow terraces occurred in two major phases: 73-46 ka and 39-23 ka and at least six minor phases between <23 ka and 7 ka. The incision was initiated shortly after 7 ka and ascribed to the decrease in overall monsoon intensity and simultaneous reduction in sediment flux. The first phase (73-46 ka) of aggradation was regional and occurred in a pre-existing river valley, whereas the later phases (39 ka onward) occurred as cut-and-fill and degraded terraces. The incision of the first major phase (220 m thick) accelerated between similar to 46 ka and 39 ka due to reactivation of the Chamba Thrust and the Main Boundary Thrust (MBT). The study suggests that the fluvial dynamics and aggradation phases in the Ravi River Valley were regulated by monsoon variability, whereas both tectonic activity and climatic variables governed the incision of these deposits. The contemporaneous aggradation and incision in the hinterland and the Indo-Gangetic plains suggest that the Late Quaternary climate variability was the main factor in the evolution of fluvial landforms.
英文关键词	Valley-fill terraces Ravi River Monsoon Optically Stimulated Luminescence chronology Chamba region Indus River system
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000718293400001
WOS关键词	CENTRAL GANGA PLAIN ; LATE PLEISTOCENE ; SUB-HIMALAYA ; LUMINESCENCE CHRONOLOGY ; WESTERN HIMALAYA ; ALLUVIAL FANS ; ASIAN MONSOON ; THAR DESERT ; FLUVIAL AGGRADATION ; DHAULADHAR RANGE
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/2XILL650/374443
作者单位	[Joshi, M.; Thakur, V. C.; Suresh, N.] Wadia Inst Himalayan Geol, 33 GMS Rd, Dehra Dun, Uttarakhand, India; [Joshi, M.] GB Pant Natl Inst Himalayan Environm, Sikkim Reg Ctr, Gangtok, India; [Joshi, M.; Sundriyal, Y. P.] HNB Garhwal Univ, Srinagar, Uttrakhand, India
推荐引用方式 GB/T 7714	Joshi, M.,Thakur, V. C.,Suresh, N.,et al. Climate-tectonic imprints on the Late Quaternary Ravi River Valley Terraces of the Chamba region in the NW Himalaya[J],2022,223.
APA	Joshi, M.,Thakur, V. C.,Suresh, N.,&Sundriyal, Y. P..(2022).Climate-tectonic imprints on the Late Quaternary Ravi River Valley Terraces of the Chamba region in the NW Himalaya.JOURNAL OF ASIAN EARTH SCIENCES,223.
MLA	Joshi, M.,et al."Climate-tectonic imprints on the Late Quaternary Ravi River Valley Terraces of the Chamba region in the NW Himalaya".JOURNAL OF ASIAN EARTH SCIENCES 223(2022).