Influence of seafloor topography on gas hydrate occurrence across a submarine canyon-incised continental slope in the northern margin of the south china sea

In a submarine canyon-incised continental slope, the observed bottom simulation reflection (BSR) frequently appears not to match with the predicted base of the gas hydrate stability zone (BGHSZ). However, the mechanism behind this discrepancy is often debated due to the lack of in-situ borehole meas...

Full description

Saved in:
Bibliographic Details
Published in:Marine and petroleum geology 2021-11, Vol.133, p.105279, Article 105279
Main Authors: Wang, Jiliang, Wu, Shiguo, Sun, Jin, Feng, Wanli, Li, Qingping
Format: Article
Language:English
Subjects:
Bottom simulating reflection
Gas hydrate stability zone
Geothermal gradient
South China Sea
Topographic effect
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In a submarine canyon-incised continental slope, the observed bottom simulation reflection (BSR) frequently appears not to match with the predicted base of the gas hydrate stability zone (BGHSZ). However, the mechanism behind this discrepancy is often debated due to the lack of in-situ borehole measurements. In the Shenhu area, a submarine canyon region on the northern continental slope of the South China Sea, a suite of datasets, including 3D seismic data, well logs and in-situ borehole temperature measurements enable us to study the gas hydrate stability zone. In-situ borehole temperature measurements reveal a nonlinear geothermal gradient within shallow 200 m-thick marine sediments. The geothermal gradient fit with the uppermost sediment interval (
ISSN:0264-8172
1873-4073
DOI:10.1016/j.marpetgeo.2021.105279