ACCUMULATION OF BANK-TOP SEDIMENT ON THE WESTERN SLOPE OF GREAT BAHAMA BANK - RAPID PROGRADATION OF A CARBONATE MEGABANK

被引：0
|
作者：
WILBER, RJ
MILLIMAN, JD
HALLEY, RB
机构：
[1] WOODS HOLE OCEANOG INST,WOODS HOLE,MA 02543
[2] US GEOL SURVEY,ST PETERSBURG,FL 33705
来源：
GEOLOGY | 1990年 / 18卷 / 10期
关键词：
D O I：
10.1130/0091-7613(1990)018<0970:AOBTSO>2.3.CO;2
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
High-resolution seismic profiles and submersible observations along the leeward slope of western Great Bahama Bank show large-scale export of bank-top sediment and rapid progradation of the slope during the Holocene. A wedge-shaped sequence, up to 90m thick, is present along most of the slope and consists of predominantly aragonite mud derived from the bank since flooding of the platforms 6-8 ka. Total sediment volume of the slope sequence is 40%-80% that of Holocene sediment currently retained on the bank. Maximum rates of vertical accumulation and lateral progradation are 11-15 m/ka and 80-110 m/ka, respectively: 10 to 100 times greater than previously known for periplatform muds. -from Authors
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页码：970 / 974
页数：5
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