Pockmarks in Spitsbergen fjords

被引：0
|
作者：
Forwick, Matthias [1 ]
Baeten, Nicole J. [1 ]
Vorren, Tore O. [1 ]
机构：
[1] Univ Tromso, Dept Geol, N-9037 Tromso, Norway
来源：
NORWEGIAN JOURNAL OF GEOLOGY | 2009年 / 89卷 / 1-2期
关键词：
BARENTS SEA; SCOTIAN SHELF; BELFAST BAY; GAS ESCAPE; NORTH-SEA; SONAR; FEATURES; MARINE; MARGIN; MAINE;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Swath bathymetry and high-resolution seismic data, as well as published material are used to analyse pockmarks in Spitsbergen fjords. Up to 250 m wide and 13 m deep pockmarks occur in Gronfjorden, Ymerbukta, Adventfjorden, Billefjorden and van Keulenfjorden. They developed during the past c. 11,300 years, as the result of seepage of thermogenic gas and porewater. Factors controlling the distribution of pockmarks in these subpolar fjords include 1) tectonic lineaments, 2) the lithological composition and lateral outcrop of bedrock, 3) the orientation of glacial lineations and 4) exceptionally rapid deposition of debris lobes related to glacial surges.
引用
收藏
页码：65 / 77
页数：13
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