Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis)
An imbricate thrust belt that extends along strike for over 2000 km overprints the tectonic boundary between two of the largest allochthonous crustal fragments (Intermontane and Insular superterranes) in the North American Cordillera and affects rocks west of the Coast Plutonic Complex in southeast...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
CaltechDATA
1991
|
Subjects: | |
Online Access: | https://doi.org/10.22002/D1.1076 |
id |
ftcaltechdata:oai:data.caltech.edu:qs7xv-vk146 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechdata:oai:data.caltech.edu:qs7xv-vk146 2023-10-09T21:56:30+02:00 Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) Rubin, Charles Martin California Institute of Technology Diaz, Tony 1991 application/pdf https://doi.org/10.22002/D1.1076 eng eng CaltechDATA url:http://resolver.caltech.edu/CaltechTHESIS:04132011-115331837 doi:10.7907/ZQ82-2077 1076 doi:10.22002/D1.1076 oai:data.caltech.edu:qs7xv-vk146 info:eu-repo/semantics/openAccess other Alaska geochronology structural geology tectonics North American Cordillera Coast Plutonic Complex gps thesis phd info:eu-repo/semantics/other 1991 ftcaltechdata https://doi.org/10.22002/D1.107610.7907/ZQ82-2077 2023-09-10T19:08:30Z An imbricate thrust belt that extends along strike for over 2000 km overprints the tectonic boundary between two of the largest allochthonous crustal fragments (Intermontane and Insular superterranes) in the North American Cordillera and affects rocks west of the Coast Plutonic Complex in southeast Alaska, western British Columbia and northern Washington. Deformation was broadly coeval with mid-Cretaceous magmatism and involved the emplacement of west-directed thrust nappes over a structurally intact and relatively unmetamorphosed basement. The Paleozoic and lower Mesozoic Alexander terrane forms structural basement for much of the thrust belt, along a moderately northeast-dipping ramp. The western metamorphic belt of the Coast Plutonic Complex consists of the Alexander and Taku terranes, and the Upper Jurassic and Lower Cretaceous Gravina sequence. The Alexander terrane consists of lower Paleozoic metavolcanic and metasedimentary rocks (Descon Formation) and dioritic plutons that are unconformably overlain by Lower Devonian clastic strata (Karheen Formation). These rocks are overlain locally by Upper Triassic basalt rhyolite and marine clastic strata (Hyd Group). The Taku terrane consists of polydeformed and metamorphosed strata that are divided into anupper Paleozoic and lower Mesozoic assemblage (Alava sequence) and a lower Paleozoic assembtage (Kah Shakes sequence). The lower Paleozoic Kah Shakes sequence consists of Devonian orthogneiss, quartz-rich metasedimentary rocks, metabasalt, meta-silicic tuff, marble, cate-silicate, and quartzite. The quartz-rich metasedimentary rocks may be correlative with the lower Paleozoic and mid-Paleozoic Yukon-Tanana terrane, which represents an east-Pacific fringing arc complex built on continental slope and rise deposits. The upper Paleozoic and lower Mesozoic Alava sequence consists of crinoidal and argillaceous marble, carbonaceous phyllite, argillite, mafic flows, pillow breccia, pyroclastic tuff, and minor quartz-rich metasedimentary rocks. The upper Paleozoic part of ... Other/Unknown Material Alaska Yukon CaltechDATA (California Institute of Technology Research Data Repository) Yukon Pacific Taku ENVELOPE(-133.854,-133.854,59.633,59.633) Ramp The ENVELOPE(166.433,166.433,-77.633,-77.633) |
institution |
Open Polar |
collection |
CaltechDATA (California Institute of Technology Research Data Repository) |
op_collection_id |
ftcaltechdata |
language |
English |
topic |
Alaska geochronology structural geology tectonics North American Cordillera Coast Plutonic Complex gps thesis phd |
spellingShingle |
Alaska geochronology structural geology tectonics North American Cordillera Coast Plutonic Complex gps thesis phd Rubin, Charles Martin Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) |
topic_facet |
Alaska geochronology structural geology tectonics North American Cordillera Coast Plutonic Complex gps thesis phd |
description |
An imbricate thrust belt that extends along strike for over 2000 km overprints the tectonic boundary between two of the largest allochthonous crustal fragments (Intermontane and Insular superterranes) in the North American Cordillera and affects rocks west of the Coast Plutonic Complex in southeast Alaska, western British Columbia and northern Washington. Deformation was broadly coeval with mid-Cretaceous magmatism and involved the emplacement of west-directed thrust nappes over a structurally intact and relatively unmetamorphosed basement. The Paleozoic and lower Mesozoic Alexander terrane forms structural basement for much of the thrust belt, along a moderately northeast-dipping ramp. The western metamorphic belt of the Coast Plutonic Complex consists of the Alexander and Taku terranes, and the Upper Jurassic and Lower Cretaceous Gravina sequence. The Alexander terrane consists of lower Paleozoic metavolcanic and metasedimentary rocks (Descon Formation) and dioritic plutons that are unconformably overlain by Lower Devonian clastic strata (Karheen Formation). These rocks are overlain locally by Upper Triassic basalt rhyolite and marine clastic strata (Hyd Group). The Taku terrane consists of polydeformed and metamorphosed strata that are divided into anupper Paleozoic and lower Mesozoic assemblage (Alava sequence) and a lower Paleozoic assembtage (Kah Shakes sequence). The lower Paleozoic Kah Shakes sequence consists of Devonian orthogneiss, quartz-rich metasedimentary rocks, metabasalt, meta-silicic tuff, marble, cate-silicate, and quartzite. The quartz-rich metasedimentary rocks may be correlative with the lower Paleozoic and mid-Paleozoic Yukon-Tanana terrane, which represents an east-Pacific fringing arc complex built on continental slope and rise deposits. The upper Paleozoic and lower Mesozoic Alava sequence consists of crinoidal and argillaceous marble, carbonaceous phyllite, argillite, mafic flows, pillow breccia, pyroclastic tuff, and minor quartz-rich metasedimentary rocks. The upper Paleozoic part of ... |
author2 |
California Institute of Technology Diaz, Tony |
format |
Other/Unknown Material |
author |
Rubin, Charles Martin |
author_facet |
Rubin, Charles Martin |
author_sort |
Rubin, Charles Martin |
title |
Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) |
title_short |
Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) |
title_full |
Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) |
title_fullStr |
Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) |
title_full_unstemmed |
Geologic map of Cleveland Peninsula, Revillagigedo and adjacent islands, Southeastern Alaska - U-Pb zircon sample locations: Supplement 2 from "Structural, stratigraphic, and geochronologic analysis of the Alexander-Taku terrane boundary and the overlapping upper Jurassic to lower Cretaceous gravina sequence, southeast Alaska" (Thesis) |
title_sort |
geologic map of cleveland peninsula, revillagigedo and adjacent islands, southeastern alaska - u-pb zircon sample locations: supplement 2 from "structural, stratigraphic, and geochronologic analysis of the alexander-taku terrane boundary and the overlapping upper jurassic to lower cretaceous gravina sequence, southeast alaska" (thesis) |
publisher |
CaltechDATA |
publishDate |
1991 |
url |
https://doi.org/10.22002/D1.1076 |
long_lat |
ENVELOPE(-133.854,-133.854,59.633,59.633) ENVELOPE(166.433,166.433,-77.633,-77.633) |
geographic |
Yukon Pacific Taku Ramp The |
geographic_facet |
Yukon Pacific Taku Ramp The |
genre |
Alaska Yukon |
genre_facet |
Alaska Yukon |
op_relation |
url:http://resolver.caltech.edu/CaltechTHESIS:04132011-115331837 doi:10.7907/ZQ82-2077 1076 doi:10.22002/D1.1076 oai:data.caltech.edu:qs7xv-vk146 |
op_rights |
info:eu-repo/semantics/openAccess other |
op_doi |
https://doi.org/10.22002/D1.107610.7907/ZQ82-2077 |
_version_ |
1779321288058208256 |