Large-scale mass wasting on the Miocene continental margin of western India

doi:10.1130/B35158.1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Large-scale mass wasting on the Miocene continental margin of western India
	Dailey, Sarah K.12; Clift, Peter D.12; Kulhanek, Denise K.13; Blusztajn, Jerzy 14; Routledge, Claire M.15; Calves, Gerome 7; O'Sullivan, Paul 11; Jonell, Tara N.17; Pandey, Dhananjai K.18; Ando, Sergio 19
刊名	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
	2020
卷号	132 期号:1-2 页码:85-112
ISSN号	0016-7606
DOI	10.1130/B35158.1
通讯作者	Clift, Peter D.(pclift@lsu.edu)
英文摘要	A giant mass-transport complex was recently discovered in the eastern Arabian Sea, exceeding in volume all but one other known complex on passive margins worldwide. The complex, named the Nataraja Slide, was drilled by International Ocean Discovery Program (IODP) Expedition 355 in two locations where it is similar to 300 m (Site U1456) and similar to 200 m thick (Site U1457). The top of this mass-transport complex is defined by the presence of both reworked microfossil assemblages and deformation structures, such as folding and faulting. The deposit consists of two main phases of mass wasting, each consisting of smaller pulses, with generally fining-upward cycles, all emplaced just prior to 10.8 Ma based on biostratigraphy. The base of the deposit at each site is composed largely of matrix-supported carbonate breccia that is interpreted as the product of debris-flows. In the first phase, these breccias alternate with well-sorted calcar-enites deposited from a high-energy current, coherent limestone blocks that are derived directly from the Indian continental margin, and a few clastic mudstone beds. In the second phase, at the top of the deposit, muddy turbidites dominate and become increasingly more siliciclastic. At Site U1456, where both phases are seen, a 20-m section of hemipelagic mudstone is present, overlain by a similar to 40-m-thick section of calcarenite and slumped interbedded mud and siltstone. Bulk sediment geochemistry, heavy-mineral analysis, clay mineralogy, isotope geochemistry, and detrital zircon U-Pb ages constrain the provenance of the clastic, muddy material to being reworked, Indus-derived sediment, with input from western Indian rivers (e.g., Narmada and Tapti rivers), and some material from the Deccan Traps. The carbonate blocks found within the breccias are shallow-water limestones from the outer western Indian continental shelf, which was oversteepened from enhanced clastic sediment delivery during the mid-Miocene. The final emplacement of the material was likely related to seismicity as there are modern intraplate earthquakes close to the source of the slide. Although we hypothesize that this area is at low risk for future mass wasting events, it should be noted that other oversteepened continental margins around the world could be at risk for mass failure as large as the Nataraja Slide.
资助项目	Charles T. McCord Jr Chair in Petroleum Geology at Louisiana State University ; Ministry of Earth Sciences, Government of India ; National Centre for Polar and Ocean Research (NCPOR)[90/2018] ; National Research Foundation of Korea[2016R1A2B4008256] ; National Research Foundation of Korea[2019R1A2C1007701] ; CSIR-National Institute of Oceanography, India
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000505809800006
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/164115]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Clift, Peter D.
作者单位	1.Natl Inst Oceanog, Geol Oceanog Div, Panaji 403004, Goa, India 2.Oil & Nat Gas Commiss, 11 High,Bandra Sion Link Rd, Mumbai 400017, Maharashtra, India 3.Univ Estadual Paulista, Inst Geociencias & Ciencias Exatas, 1515 Ave 24-A, BR-13506900 Rio Claro, SP, Brazil 4.Kumaun Univ, Dept Geol, Naini Tal 263002, India 5.Banaras Hindu Univ, Dept Geol, Varanasi 221005, Uttar Pradesh, India 6.Xiamen Univ, Dept Geol Oceanog, Xiamen 361102, Fujian, Peoples R China 7.Univ Toulouse 3 Paul Sabatier, Geosci Environm Toulouse, 14 Ave Edouard Belin, F-31400 Toulouse, France 8.Hokkaido Univ, Grad Sch Environm Sci, Kita Ku, N10W5, Sapporo, Hokkaido 0600810, Japan 9.Scripps Inst Oceanog, 9500 Gilman Dr, La Jolla, CA 92093 USA 10.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Dailey, Sarah K.,Clift, Peter D.,Kulhanek, Denise K.,et al. Large-scale mass wasting on the Miocene continental margin of western India[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(1-2):85-112.
APA	Dailey, Sarah K..,Clift, Peter D..,Kulhanek, Denise K..,Blusztajn, Jerzy.,Routledge, Claire M..,...&Yu, Zhaojie.(2020).Large-scale mass wasting on the Miocene continental margin of western India.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(1-2),85-112.
MLA	Dailey, Sarah K.,et al."Large-scale mass wasting on the Miocene continental margin of western India".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.1-2(2020):85-112.