Velocity structure of the methane hydrate formation at the Blake Outer Ridge
Seismic analysis of data from the Blake Outer Ridge indicates the presence of hydratebearing sediments overlaying gas-saturated sediments in this region. In an attempt to determine possible lateral and vertical variations of the hydrate and gas sediments, I performed a 2-D velocity analysis along tw...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.386.2741 2023-05-15T17:12:01+02:00 Velocity structure of the methane hydrate formation at the Blake Outer Ridge Christine Ecker The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.386.2741 http://sepwww.stanford.edu/data/media/public/docs/sep84/christin2.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.386.2741 http://sepwww.stanford.edu/data/media/public/docs/sep84/christin2.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://sepwww.stanford.edu/data/media/public/docs/sep84/christin2.pdf text ftciteseerx 2016-09-18T00:33:16Z Seismic analysis of data from the Blake Outer Ridge indicates the presence of hydratebearing sediments overlaying gas-saturated sediments in this region. In an attempt to determine possible lateral and vertical variations of the hydrate and gas sediments, I performed a 2-D velocity analysis along two approximately perpendicular seismic lines. Subsequent determination of the seafloor and BSR reflection coefficients along one of the lines resulted in additional zero offset P-wave velocity and density constraints. Combining these with the average interval velocity model of this line, I performed a 1-D elastic amplitude modeling of zero offset reflections using the Thompson-Haskell reflectivity method. The results suggest that regions showing a continuous bottom simulating reflection are characterized by a thick hydrate layer that has an average velocity of 2.1 km/s overlaying low-velocity ( ≈ 1.6 km/s) sediments of considerable thickness. This result agrees well with results discussed in SEP80. In regions of discontinuous BSR, a less pronounced velocity contrast is visible, probably indicating a decrease in the hydrate concentration of the sediments. Text Methane hydrate Unknown Haskell ENVELOPE(-64.279,-64.279,-66.749,-66.749) |
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ftciteseerx |
language |
English |
description |
Seismic analysis of data from the Blake Outer Ridge indicates the presence of hydratebearing sediments overlaying gas-saturated sediments in this region. In an attempt to determine possible lateral and vertical variations of the hydrate and gas sediments, I performed a 2-D velocity analysis along two approximately perpendicular seismic lines. Subsequent determination of the seafloor and BSR reflection coefficients along one of the lines resulted in additional zero offset P-wave velocity and density constraints. Combining these with the average interval velocity model of this line, I performed a 1-D elastic amplitude modeling of zero offset reflections using the Thompson-Haskell reflectivity method. The results suggest that regions showing a continuous bottom simulating reflection are characterized by a thick hydrate layer that has an average velocity of 2.1 km/s overlaying low-velocity ( ≈ 1.6 km/s) sediments of considerable thickness. This result agrees well with results discussed in SEP80. In regions of discontinuous BSR, a less pronounced velocity contrast is visible, probably indicating a decrease in the hydrate concentration of the sediments. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Christine Ecker |
spellingShingle |
Christine Ecker Velocity structure of the methane hydrate formation at the Blake Outer Ridge |
author_facet |
Christine Ecker |
author_sort |
Christine Ecker |
title |
Velocity structure of the methane hydrate formation at the Blake Outer Ridge |
title_short |
Velocity structure of the methane hydrate formation at the Blake Outer Ridge |
title_full |
Velocity structure of the methane hydrate formation at the Blake Outer Ridge |
title_fullStr |
Velocity structure of the methane hydrate formation at the Blake Outer Ridge |
title_full_unstemmed |
Velocity structure of the methane hydrate formation at the Blake Outer Ridge |
title_sort |
velocity structure of the methane hydrate formation at the blake outer ridge |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.386.2741 http://sepwww.stanford.edu/data/media/public/docs/sep84/christin2.pdf |
long_lat |
ENVELOPE(-64.279,-64.279,-66.749,-66.749) |
geographic |
Haskell |
geographic_facet |
Haskell |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
http://sepwww.stanford.edu/data/media/public/docs/sep84/christin2.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.386.2741 http://sepwww.stanford.edu/data/media/public/docs/sep84/christin2.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766068767600672768 |