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

文献类型:期刊论文

作者Dailey, Sarah K.9; Clift, Peter D.9; Kulhanek, Denise K.10; Blusztajn, Jerzy11; Routledge, Claire M.12; Calves, Gerome13; O'Sullivan, Paul14; Jonell, Tara N.8; Pandey, Dhananjai K.15; Ando, Sergio16
刊名GEOLOGICAL SOCIETY OF AMERICA BULLETIN
出版日期2020
卷号132期号:1-2页码:85-112
ISSN号0016-7606
DOI10.1130/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
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.Kumaun Univ, Dept Geol, Naini Tal 263002, India
2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China
3.Scripps Inst Oceanog, 9500 Gilman Dr, La Jolla, CA 92093 USA
4.Hokkaido Univ, Grad Sch Environm Sci, Kita Ku, N10W5, Sapporo, Hokkaido 0600810, Japan
5.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Fujian, Peoples R China
6.Xiamen Univ, Dept Geol Oceanog, Xiamen 361102, Fujian, Peoples R China
7.Banaras Hindu Univ, Dept Geol, Varanasi 221005, Uttar Pradesh, India
8.Univ Queensland, Sch Earth & Environm Sci, St Lucia, Qld 4072, Australia
9.Louisiana State Univ, Dept Geol & Geophys, E253 Howe Russell Kniffen Geosci Complex, Baton Rouge, LA 70803 USA
10.Texas A&M Univ, Int Ocean Discovery Program, 1000 Discovery Dr, College Stn, TX 77845 USA
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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.

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