Tectonics of the Yakutat Block, an allochthonous terrane in the northern Gulf of Alaska

Bruns, Terry R.

doi:10.3133/ofr8513

Cited by 46 publications

(57 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Surveys L378 and L677 utilized a 5-airgun, 1326 in 3 array and a 2.4 km, 24-channel streamer. These data were used primarily in Yakutat terrane-related tectonics and fault mapping studies (e.g., Bruns, 1982Bruns, , 1985Bruns and Carlson, 1987;Gulick et al, 2007;Pavlis et al, 2004;Worthington et al, 2010). Four remaining single-channel seismic surveys (F689, F988, F186, and F789) were collected by the USGS in the 1980s in conjunction with the GLORIA sidescan sonar mapping of the newly expanded United States Exclusive Economic Zone.…”

Section: Data 2d Seismic-refl Ection Datamentioning

confidence: 99%

Tectonic and climatic influence on the evolution of the Surveyor Fan and Channel system, Gulf of Alaska

et al. 2011

View full text Add to dashboard Cite

Section: Data 2d Seismic-refl Ection Datamentioning

confidence: 99%

Tectonic and climatic influence on the evolution of the Surveyor Fan and Channel system, Gulf of Alaska

et al. 2011

View full text Add to dashboard Cite

“…For example: 1. Due to its tectonic setting (Bruns, 1985), the northeastern Gulf of Alaska is the most seismically active region in the United States, apart from the Aleutian Islands. All three study areas are located in a region suggested as having a uniform ground-shaking intensity; that is, each study area will, over a period of time be subjected to earthquake movements having about the same maximum intensity (Stephens and Page, 1982).…”

Section: Discussionmentioning

confidence: 99%

Submarine landslides: Selected studies in the U.S. Exclusive Economic Zone

Schwab¹,

Lee²,

Twichell³

1993

View full text Add to dashboard Cite

“…The probable maximum height of winter storm waves in the area is 37 m (Quayle and Fulbright 1975;Bea 1976). Due to its tectonic setting (Bruns 1985), the northeast Gulf of Alaska is, apart from the Aleutian Islands, the most seismically active region in the United States (Stephens and Page 1982).…”

Section: Geologic Settingmentioning

confidence: 99%

Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska

Schwab¹,

Lee²,

Molnia³

1988

Marine Geotechnology

View full text Add to dashboard Cite

Slope failures and subsequent mass movements have been identified in Holocene glaciomarine sediment on declivities less than 1.3° on the Alsek prodelta, Gulf of Alaska. Isolated collapse features cover less than 10 percent of a nearshore sand deposit, in water depths less than 40 m. In contrast, sediment gravity flow deposits (disintegrative failures) cover more than 95 percent of a clayey silt deposit that is located in water depths between 35 m and 80 m. The morphology of individual disintegrative failures in the prodelta clayey silt indicates an eastward increase in the internal deformation and downslope translation of the failed sediment mass, the most extreme deformations being relatively large linear depressions up to 6-m deep, 400-m wide, and 1800-m long, extending downslope in the easternmost part of the study area.In-place cone penetration tests show that the nearshore sand is dense and is probably not highly susceptible to cyclic strength degradation and ultimate slope failure. The isolated collapse features are thought to result from the slope failure of more susceptible clayey silt that underlies the sand, sampled in nearby vibracores.The generation of disintegrative failures on the Alsek prodelta involves a drained conversion of the sediment (pore-water influx) from an in-place dense condition (State II) to an expanded condition (State I) during storm-wave loading. Without this conversion, only nondisintegrative failures, typified by limited internal deformation or minor downslope translation of the failed sediment mass are possible. Higher porosity, underconsolidated, clayey silt of the eastern part of the study area is more susceptible to conversion from State II to State I than is the denser, normally consolidated, clayey silt of the western part of the study area. This trend in the porosity and consolidation state of the sediment is expressed as the eastward increase in the internal deformation and downslope translation of disintegrative failures.

show abstract

Tectonics of the Yakutat Block, an allochthonous terrane in the northern Gulf of Alaska

Cited by 46 publications

References 87 publications

Tectonic and climatic influence on the evolution of the Surveyor Fan and Channel system, Gulf of Alaska

Tectonic and climatic influence on the evolution of the Surveyor Fan and Channel system, Gulf of Alaska

Submarine landslides: Selected studies in the U.S. Exclusive Economic Zone

Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska

Contact Info

Product

Resources

About