DOI: 10.1002/2014GL061598
论文题名: Seismic evidence of continental margin influence on the NinetyEast Ridge in the Bay of Bengal
作者: Moeremans R.E. ; Singh S.C.
刊名: Geophysical Research Letters
ISSN: 0094-9698
EISSN: 1944-9429
出版年: 2014
卷: 41, 期: 20 起始页码: 7143
结束页码: 7150
语种: 英语
英文关键词: Andaman subduction
; Bay of Bengal
; continental margin
; Cretaceous sediments
; NinetyEast Ridge
; seismic reflection
Scopus关键词: Gas generators
; Geodynamics
; Oil shale
; Seismic waves
; Seismology
; Tectonics
; Andaman subduction
; Bay of Bengal
; Continental margin
; NinetyEast Ridge
; Seismic reflections
; Sediments
; accretionary prism
; continental margin
; Cretaceous
; data set
; geodynamics
; segmentation
; seismic reflection
; source rock
; Andamans and Nicobars
; Bay of Bengal
; India
; Indian Ocean
英文摘要: The NinetyEast Ridge (NER), one of the most enigmatic features in the Indian Ocean, is covered by thick Bengal Fan sediment north of 9°N. We present seismic reflection data on the eastern flank of the NER, at 10°N, that show the presence of 4-5-km thick sediments beneath the Bengal Fan sediments. These sediments can be imaged up to 60-km beneath the Andaman fore-arc accretionary wedge, suggesting that the décollement lies above these sediments. The presence of thick sediments above the northernmost segment of the NER suggests that this segment was close to a continental margin during its emplacement. We propose that these sediments were deposited soon after the breakup of India and Antarctica, between 130 and 100-Ma, and might act as source rocks for oil and gas generation beneath recent Bengal Fan sediments. Furthermore, subducting thick sediments can significantly change the seismogenic behavior of the Andaman subduction zone. Key Points Thick sediments are imaged on the eastern flank of the NERThe northern segment of the NER was emplaced close to a continental marginResults are important for geodynamics, oil and gas generation, and subduction ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911403107&doi=10.1002%2f2014GL061598&partnerID=40&md5=bc66acc7d6e5a1d3203c21b2d94ab398
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6962
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Équipe de Géosciences Marines, Institut de Physique du Globe de Paris, CNRS, Paris, France
Recommended Citation:
Moeremans R.E.,Singh S.C.. Seismic evidence of continental margin influence on the NinetyEast Ridge in the Bay of Bengal[J]. Geophysical Research Letters,2014-01-01,41(20).