The architecture and evolution of the Middle Bengal Fan in vicinity of the active channel-levee system imaged by high-resolution seismic data

被引:64
|
作者
Schwenk, T
Spiess, V
Breitzke, M
Hübscher, C
机构
[1] Univ Bremen, Fachbereich Geowissensch, D-28344 Bremen, Germany
[2] Univ Hamburg, Inst Geophys, D-20146 Hamburg, Germany
关键词
Bengal Fan; channel-levee system; high-resolution seismic data;
D O I
10.1016/j.marpetgeo.2005.01.007
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
High-resolution seismic data from the Middle Bengal Fan were analysed to study the architecture of the fan in the vicinity of the active channel-levee system and to evaluate channel behaviours. The upper 600 m column of the fan in the study area reveal a pattern of different sized channel-levee systems and high amplitude reflection packets (HARPS) of varying thicknesses, no mass-flow deposits or hemipelagic drapes are found. Within the channel-levee systems, units of chaotic high amplitude reflectors (CHARS), which represent aggraded and migrated channel axes, as well as abandoned channel-fill deposits appear. All channels are characterised by erosional incision into underlying deposits. Within the active channel-levee system, numerous cut-off loops are found showing a broad spectrum of complex behaviours with different ratios of vertical aggradation and lateral migration. As a difference to the Amazon Fan, the floors of all cut off loops and the active channel are not elevated above the surrounding seafloor, which may lead to such a long lifetime resulting in the large number of cut-off loops. In contrast, a detailed studied buried system shows no cut-off loops and is characterised by a more simple behaviour: a first phase of lateral migration is followed by a second phase of simultaneous vertical aggradation and lateral migration, which finally elevated the channel floor above the level of the surrounding seafloor. These architectural differences between the systems indicate that different loaded turbidity currents have built up both systems. The aggrading and migrating channel floors likely have reservoir potential, but a high-resolution 3D seismic survey and drilling are necessary for final proof. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:637 / 656
页数:20
相关论文
共 50 条
  • [1] Frequent channel avulsions within the active channel-levee system of the middle Bengal Fan -: an exceptional channel-levee development derived from Parasound and Hydrosweep data
    Schwenk, T
    Spiess, V
    Hübscher, C
    Breitzke, M
    DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2003, 50 (05) : 1023 - 1045
  • [2] Fast static correction methods for high-frequency multichannel marine seismic reflection data: A high-resolution seismic study of channel-levee systems on the Bengal Fan
    Martin Gutowski
    Monika Breitzke
    Volkhard Spieß
    Marine Geophysical Researches, 2002, 23 : 57 - 75
  • [3] Fast static correction methods for high-frequency multichannel marine seismic reflection data: A high-resolution seismic study of channel-levee systems on the Bengal Fan
    Gutowski, M
    Breitzke, M
    Spiess, V
    MARINE GEOPHYSICAL RESEARCHES, 2002, 23 (01) : 57 - 75
  • [4] The youngest channel-levee system of the Bengal Fan: results from digital sediment echosounder data
    Hubscher, C
    Spiess, V
    Breitzke, M
    Weber, ME
    MARINE GEOLOGY, 1997, 141 (1-4) : 125 - 145
  • [5] ARCHITECTURE AND STRATIGRAPHY OF THE BENGAL FAN AS RESPONSE TO TECTONIC AND CLIMATE REVEALED FROM HIGH-RESOLUTION SEISMIC DATA
    Schwenk, Tilmann
    Spiess, Volkhard
    EXTERNAL CONTROLS ON DEEP-WATER DEPOSITIONAL SYSTEMS, 2009, (92): : 107 - 131
  • [6] Latitudinal changes in submarine channel-levee system evolution, architecture and flow processes
    Allen, Charlotte
    Peakall, Jeff
    Hodgson, David M.
    Bradbury, Will
    Booth, Adam D.
    FRONTIERS IN EARTH SCIENCE, 2022, 10
  • [7] Different avulsion events throughout the evolution of submarine channel-levee systems: A 3D seismic case study from the northeastern Bengal Fan
    Qi, Kun
    Ding, Liangbo
    Gong, Chenglin
    Wang, Haiqiang
    Shao, Dali
    Cai, Zheng
    Ma, Hongxia
    Xu, Xiaoyong
    Jin, Zhenkui
    MARINE AND PETROLEUM GEOLOGY, 2021, 134
  • [8] Integrating outcrop and subsurface data to assess the temporal evolution of a submarine channel-levee system
    Morris, Emma A.
    Hodgson, David M.
    Flint, Stephen
    Brunt, Rufus L.
    Luthi, Stefan M.
    Kolenberg, Yolanda
    AAPG BULLETIN, 2016, 100 (11) : 1663 - 1691
  • [9] Active channel systems in the middle Indus fan: results from high-resolution bathymetry surveys
    Mishra, Ravi
    Pandey, D. K.
    Ramesh, P.
    CURRENT SCIENCE, 2015, 108 (03): : 409 - 412