High-resolution seismic studies of gas hydrates west of Svalbard

被引：0
|
作者：
Jörg Posewang
Jürgen Mienert
机构：
[1] SFB 313,
[2] Christian-Albrechts-University,undefined
[3] Olshausenstr. 40,undefined
[4] D-24118 Kiel,undefined
[5] Germany,undefined
[6] Department of Geology,undefined
[7] University of Tromsø,undefined
[8] Dramsveien 201,undefined
[9] N-9037 Tromsø,undefined
[10] Norway,undefined
来源：
Geo-Marine Letters | 1999年 / 19卷
关键词：
Reflection; High Velocity; Thickness Variation; Hydrophone; Seismic Profile;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
 A strong bottom-simulating reflection (BSR) with high-amplitude variations is detectable in high- resolution reflection seismic profiles west of Svalbard. Above the BSR, anomalously high velocities up to 1840 m/s, calculated from high-frequency ocean-bottom hydrophone (HF-OBH) data, indicate the existence of gas-hydrated sediments. Below the BSR, a low-velocity layer, interpreted as gas-bearing sediments, shows thickness variations from 12 to 25 m. In addition, two other low-velocity layers clearly containing free gas are detected within the classic hydrate stability zone (HSZ) where, a theoretical viewpoint, free gas cannot exist.
引用
收藏
页码：150 / 156
页数：6
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