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Overpressure and earthquake initiate...

Stigall, Justin Lee.

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Overpressure and earthquake initiated slope failure in the Ursa Region, northern Gulf of Mexico.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Overpressure and earthquake initiated slope failure in the Ursa Region, northern Gulf of Mexico./
Author:	Stigall, Justin Lee.
Description:	50 p.
Notes:	Source: Masters Abstracts International, Volume: 49-01, page: 0329.
Contained By:	Masters Abstracts International49-01.
Subject:	Geophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1485975
ISBN:	9781124212975

Overpressure and earthquake initiated slope failure in the Ursa Region, northern Gulf of Mexico.
Stigall, Justin Lee.

Overpressure and earthquake initiated slope failure in the Ursa Region, northern Gulf of Mexico. - 50 p.

Source: Masters Abstracts International, Volume: 49-01, page: 0329.

Thesis (M.S.)--Rice University, 2009.

We use two-dimensional fluid flow and slope stability models to study the evolution of overpressure and slope stability in the Ursa region, northern Gulf of Mexico. Our model predictions match measured overpressures from Integrated Ocean Drilling Project Expedition 308 Site U1324 above 200 mbsf, but overpredicts deeper overpressures by 0.4-1.1 MPa. Slope stability models predict a slope failure at 61 ka on the eastern end of the Ursa region. This predicted failure corresponds to a mass transport deposit (MTD) that has been interpreted as a retrogressive failure initiated by high overpressure. Overpressure alone could not drive failure of a second MTD at &sim;27 ka. We predict that a magnitude 5 earthquake within 140 km of the Ursa region would initiate this failure. We conclude that overpressure could drive submarine slope failures and horizontal acceleration from earthquakes can further facilitate this process.

ISBN: 9781124212975Subjects--Topical Terms:

535228
Geophysics.

Overpressure and earthquake initiated slope failure in the Ursa Region, northern Gulf of Mexico.
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020 $a 9781124212975
035 $a (UMI)AAI1485975
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100 1 $a Stigall, Justin Lee. $3 1683826
245 1 0 $a Overpressure and earthquake initiated slope failure in the Ursa Region, northern Gulf of Mexico.
300 $a 50 p.
500 $a Source: Masters Abstracts International, Volume: 49-01, page: 0329.
502 $a Thesis (M.S.)--Rice University, 2009.
520 $a We use two-dimensional fluid flow and slope stability models to study the evolution of overpressure and slope stability in the Ursa region, northern Gulf of Mexico. Our model predictions match measured overpressures from Integrated Ocean Drilling Project Expedition 308 Site U1324 above 200 mbsf, but overpredicts deeper overpressures by 0.4-1.1 MPa. Slope stability models predict a slope failure at 61 ka on the eastern end of the Ursa region. This predicted failure corresponds to a mass transport deposit (MTD) that has been interpreted as a retrogressive failure initiated by high overpressure. Overpressure alone could not drive failure of a second MTD at &sim;27 ka. We predict that a magnitude 5 earthquake within 140 km of the Ursa region would initiate this failure. We conclude that overpressure could drive submarine slope failures and horizontal acceleration from earthquakes can further facilitate this process.
590 $a School code: 0187.
650 4 $a Geophysics. $3 535228
650 4 $a Marine Geology. $3 1674685
690 $a 0373
690 $a 0556
710 2 $a Rice University. $3 960124
773 0 $t Masters Abstracts International $g 49-01.
790 $a 0187
791 $a M.S.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1485975