Physical properties of 4 cores from the Bengal Fan
Cobertura |
MEDIAN LATITUDE: 16.511667 * MEDIAN LONGITUDE: 87.813750 * SOUTH-BOUND LATITUDE: 16.498333 * WEST-BOUND LONGITUDE: 87.635000 * NORTH-BOUND LATITUDE: 16.546667 * EAST-BOUND LONGITUDE: 88.000000 * DATE/TIME START: 1994-01-15T00:00:00 * DATE/TIME END: 1994-01-15T00:00:00 |
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Data(s) |
08/06/2011
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Resumo |
New stratigraphic and high-resolution seismic data from the Bengal Fan indicate that the world's largest fan shows active growth during the most recent sea-level rise and the recent highstand. This unique phenomenon contradicts common sequence-stratigraphic models, and the sediment preserved provides new insight into the sedimentological response of a fan system to sea-level rise, climatic terminations, and monsoon intensity during the past climatic cycle. We present a detailed dated sequence of turbidite sedimentation based on a core transect perpendicular to the active channel-levee system in the upper mid-fan area. Between the two major terminations 1a (12 800 14C yr B.P.) and 1b (9700 14C yr B.P.), and especially at the end of the Younger Dryas, a 13-km-wide channel built up levees 50 m high. With decreasing sediment supply, continued sea-level rise, and increasing monsoon intensity during the early Holocene, turbidity currents were confined to the channel and gradually filled it. The canyon "Swatch of No Ground," a shelf depocenter that serves as the source for frequent turbidity currents, and the channel-levee system provide the unique opportunity for studying an active highstand system. Many fans showed this behavior only during lowered sea-level. |
Formato |
application/zip, 4 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.761573 doi:10.1594/PANGAEA.761573 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Weber, Michael E; Wiedicke-Hombach, Michael; Kudrass, Hermann-Rudolph; Hübscher, Christian; Erlenkeuser, Helmut (1997): Active Growth of the Bengal Fan during sea-level rise and highstand. Geology, 25(4), 315-318, doi:10.1130/0091-7613(1997)025<0315:AGOTBF>2.3.CO;2 |
Palavras-Chave | #Bay of Bengal; BENGAL FAN; Density, wet bulk; Depth; DEPTH, sediment/rock; KL; Multi-Sensor Core Logger 14, GEOTEK; Piston corer (BGR type); SO93/3; SO93/3_117KL; SO93/3_118KL; SO93/3_119KL; SO93/3_120KL; Sonne; Suscept; Susceptibility; Velocity, compressional wave; Vp; WBD |
Tipo |
Dataset |