FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1580457541> ?p ?o ?g. }

• W1580457541 abstract "The continental margin off Kodiak Island has formed at converging lithospheric plates as indicated by the eastern Aleutian Trench, the Aleutian volcanic chain, and the well-defined Benioff zone; hence, its structure should reflect the tectonic features of a subduction zone. Igneous oceanic crust seaward of the trench is overlain by at least 35 m of lower Miocene pelagic sediment coarsening upward to Miocene and Plio-Pleistocene turbidite sequences. Downbowing of this oceanic crustal sequence has formed the trench, which is filled by a wedge of turbidites 0.8 to 1.0 km thick and less than 1 m.y. old. The structure of the adjacent continental slope is expressed morphologically by a rough lower slope, a poorly developed mid-slope terrace, and a relatively smooth upper slope. Core samples from the lower slope yielded tectonically deformed and highly compacted Plio-Pleistocene sediment, similar to those that would be expected in a subduction zone. However, the original environment of deposition cannot be determined from lithologic and paleontologic data to establish whether these samples are oceanic-basin material accreted to the continent or deformed slope deposits. Seismic records across this drill site show few coherent reflecting horizons owing to the deformation. In contrast, records from an adjacent area show coherent, little-deformed reflections of the oceanic-basin sequence that can be traced beneath the slope, landward from the trench to about the mid-slope area. Such variability in intensity of deformation along the leading edge of a subduction zone End_Page 6-------------------------- is surprising and difficult to explain. The upper slope's smooth morphology is due to thick terrigeneous sediment filling older structural irregularities, a circumstance that suggests relatively less intense late Cenozoic tectonism than has affected the lower slope. The shelf break at the top of the slope, is formed by an alignment of short, relatively broad anticlines, and where they are breached by erosion, Miocene and younger sediment has been recovered. Growth of the anticlines has helped to pond sediment landward in a broad, deep shelf basin. The seismic and drilling data allow a rough comparison between the minimum volume of oceanic sediment that was on the subducted plate, and the maximum accreted material at the continental margin of equivalent late Tertiary age. Assuming the ate of subduction was 5 cm/yr, these volumes appear similar suggesting that all subducted sediment may have been accommodated in the margin. The data suggest that rapid underthrusting occurs mainly along the lower continental slope in a zone 30-40 km wide adjacent to the trench. The intensity of tectonism diminishes landward just above this zone so that the shelf basin has been only mildly affected by subduction. End_of_Record - Last_Page 7---------" @default.
• W1580457541 created "2016-06-24" @default.
• W1580457541 creator A5074170419 @default.
• W1580457541 date "1977-01-01" @default.
• W1580457541 modified "2023-09-28" @default.
• W1580457541 title "A Structural Interpretation of the Eastern Aleutian Trench and Adjacent Continental Margin Off Kodiak Island, Alaska" @default.
• W1580457541 doi "https://doi.org/10.1306/ce5387c14" @default.
• W1580457541 hasPublicationYear "1977" @default.
• W1580457541 type Work @default.
• W1580457541 sameAs 1580457541 @default.
• W1580457541 citedByCount "0" @default.
• W1580457541 crossrefType "book-chapter" @default.
• W1580457541 hasAuthorship W1580457541A5074170419 @default.
• W1580457541 hasConcept C114793014 @default.
• W1580457541 hasConcept C122792734 @default.
• W1580457541 hasConcept C127313418 @default.
• W1580457541 hasConcept C151730666 @default.
• W1580457541 hasConcept C154200439 @default.
• W1580457541 hasConcept C155310634 @default.
• W1580457541 hasConcept C162430325 @default.
• W1580457541 hasConcept C165205528 @default.
• W1580457541 hasConcept C16942324 @default.
• W1580457541 hasConcept C178790620 @default.
• W1580457541 hasConcept C185592680 @default.
• W1580457541 hasConcept C201867031 @default.
• W1580457541 hasConcept C2779227376 @default.
• W1580457541 hasConcept C58097730 @default.
• W1580457541 hasConcept C64174561 @default.
• W1580457541 hasConcept C6494504 @default.
• W1580457541 hasConcept C77928131 @default.
• W1580457541 hasConceptScore W1580457541C114793014 @default.
• W1580457541 hasConceptScore W1580457541C122792734 @default.
• W1580457541 hasConceptScore W1580457541C127313418 @default.
• W1580457541 hasConceptScore W1580457541C151730666 @default.
• W1580457541 hasConceptScore W1580457541C154200439 @default.
• W1580457541 hasConceptScore W1580457541C155310634 @default.
• W1580457541 hasConceptScore W1580457541C162430325 @default.
• W1580457541 hasConceptScore W1580457541C165205528 @default.
• W1580457541 hasConceptScore W1580457541C16942324 @default.
• W1580457541 hasConceptScore W1580457541C178790620 @default.
• W1580457541 hasConceptScore W1580457541C185592680 @default.
• W1580457541 hasConceptScore W1580457541C201867031 @default.
• W1580457541 hasConceptScore W1580457541C2779227376 @default.
• W1580457541 hasConceptScore W1580457541C58097730 @default.
• W1580457541 hasConceptScore W1580457541C64174561 @default.
• W1580457541 hasConceptScore W1580457541C6494504 @default.
• W1580457541 hasConceptScore W1580457541C77928131 @default.
• W1580457541 hasLocation W15804575411 @default.
• W1580457541 hasOpenAccess W1580457541 @default.
• W1580457541 hasPrimaryLocation W15804575411 @default.
• W1580457541 hasRelatedWork W1828793079 @default.
• W1580457541 hasRelatedWork W1967949151 @default.
• W1580457541 hasRelatedWork W1978187880 @default.
• W1580457541 hasRelatedWork W1978767192 @default.
• W1580457541 hasRelatedWork W2005129096 @default.
• W1580457541 hasRelatedWork W2006718776 @default.
• W1580457541 hasRelatedWork W2015049610 @default.
• W1580457541 hasRelatedWork W2022310589 @default.
• W1580457541 hasRelatedWork W2030800261 @default.
• W1580457541 hasRelatedWork W2040985586 @default.
• W1580457541 hasRelatedWork W2049730783 @default.
• W1580457541 hasRelatedWork W2050320241 @default.
• W1580457541 hasRelatedWork W2077044812 @default.
• W1580457541 hasRelatedWork W2081862473 @default.
• W1580457541 hasRelatedWork W2157222956 @default.
• W1580457541 hasRelatedWork W2186902991 @default.
• W1580457541 hasRelatedWork W2188893586 @default.
• W1580457541 hasRelatedWork W2307940213 @default.
• W1580457541 hasRelatedWork W2790627566 @default.
• W1580457541 hasRelatedWork W3195070575 @default.
• W1580457541 isParatext "false" @default.
• W1580457541 isRetracted "false" @default.
• W1580457541 magId "1580457541" @default.
• W1580457541 workType "book-chapter" @default.