Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska
Southern Alaska crustal exposures provide an excellent opportunity to study the growth of collisional continental margins through the processes of terrane accretion, magmatism, accretionary prism development, and subduction of oceanic spreading ridges. Kodiak Island is one of the world's best e...
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Tallahassee, Florida: Florida State University
2011
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ftfloridasu:oai:diginole.lib.fsu.edu:fsu_254086 2024-06-09T07:47:30+00:00 Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska Mahjoor, Amir Sasan (authoraut) Farris, David (professor directing thesis) Tull, James F. (committee member) Odom, A. Leroy (committee member) Department of Earth, Ocean and Atmospheric Sciences (degree granting department) Florida State University (degree granting institution) 2011 1 online resource computer https://diginole.lib.fsu.edu/islandora/object/fsu%3A254086/datastream/TN/view/Detrital%20Zircon%20Dating%20of%20the%20Kodiak%20Accretionary%20Complex%3B%20South%20Alaska.jpg English eng eng Tallahassee, Florida: Florida State University fsu:254086 (IID) FSU_migr_etd-2788 (URL) http://purl.flvc.org/fsu/fd/FSU_migr_etd-2788 https://diginole.lib.fsu.edu/islandora/object/fsu%3A254086/datastream/TN/view/Detrital%20Zircon%20Dating%20of%20the%20Kodiak%20Accretionary%20Complex%3B%20South%20Alaska.jpg This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. Oceanography Atmospheric sciences Meteorology Text 2011 ftfloridasu 2024-05-10T08:08:08Z Southern Alaska crustal exposures provide an excellent opportunity to study the growth of collisional continental margins through the processes of terrane accretion, magmatism, accretionary prism development, and subduction of oceanic spreading ridges. Kodiak Island is one of the world's best exposed accretionary complexes, and is characterized by transport along dominant large-magnitude strike-slip faults of west North America and South Alaska. In this study we focus on detrital zircon dating of the Kodiak accretionary complex on Kodiak Island Alaska. Accretionary complexes are an important fundamental element of convergent plate margins and are also important structures in continental crust formation. Their presence in the geologic record is an indicator of past subduction zones. Six graywacke detrital zircon samples from the Kodiak and the Ghost Rocks Formations were analyzed using U/Pb dating of single crystals via laser-ablation inductively coupled plasma mass spectroscopy. The maximum depositional age of the three major formations are as follow: Kodiak Formation 56.2-69.2 Ma, and Ghost Rock 58.5 Ma. The age for the small outcrop of Narrow Cape Formation is 54.1. Kodiak and Ghost Rock Formation detrital zircon age are consistent with fossil ages of these two formations, but the fossil content of Narrow Cape is younger than the detrital zircon age we measured for this formation. Some evidence in our data like resurrection of certain age zircon grains between the accreted sequences, age gaps between the accreted sequences, different rate of sedimentation and etc. are evidenc for episodical accretion in the complex and also displacement of the accreted units along the west North America and Alaska right lateral large magnitude strike slip faults. Submitted Note: A Thesis submitted to the Department of Earth, Ocean and Atmospheric Sciences in partial fulfillment of the requirements for the degree of Master of Science. Degree Awarded: Summer Semester, 2011. Date of Defense: June 17, 2011. Keywords: ... Text Kodiak Alaska Florida State University: DigiNole Commons |
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Open Polar |
collection |
Florida State University: DigiNole Commons |
op_collection_id |
ftfloridasu |
language |
English |
topic |
Oceanography Atmospheric sciences Meteorology |
spellingShingle |
Oceanography Atmospheric sciences Meteorology Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska |
topic_facet |
Oceanography Atmospheric sciences Meteorology |
description |
Southern Alaska crustal exposures provide an excellent opportunity to study the growth of collisional continental margins through the processes of terrane accretion, magmatism, accretionary prism development, and subduction of oceanic spreading ridges. Kodiak Island is one of the world's best exposed accretionary complexes, and is characterized by transport along dominant large-magnitude strike-slip faults of west North America and South Alaska. In this study we focus on detrital zircon dating of the Kodiak accretionary complex on Kodiak Island Alaska. Accretionary complexes are an important fundamental element of convergent plate margins and are also important structures in continental crust formation. Their presence in the geologic record is an indicator of past subduction zones. Six graywacke detrital zircon samples from the Kodiak and the Ghost Rocks Formations were analyzed using U/Pb dating of single crystals via laser-ablation inductively coupled plasma mass spectroscopy. The maximum depositional age of the three major formations are as follow: Kodiak Formation 56.2-69.2 Ma, and Ghost Rock 58.5 Ma. The age for the small outcrop of Narrow Cape Formation is 54.1. Kodiak and Ghost Rock Formation detrital zircon age are consistent with fossil ages of these two formations, but the fossil content of Narrow Cape is younger than the detrital zircon age we measured for this formation. Some evidence in our data like resurrection of certain age zircon grains between the accreted sequences, age gaps between the accreted sequences, different rate of sedimentation and etc. are evidenc for episodical accretion in the complex and also displacement of the accreted units along the west North America and Alaska right lateral large magnitude strike slip faults. Submitted Note: A Thesis submitted to the Department of Earth, Ocean and Atmospheric Sciences in partial fulfillment of the requirements for the degree of Master of Science. Degree Awarded: Summer Semester, 2011. Date of Defense: June 17, 2011. Keywords: ... |
author2 |
Mahjoor, Amir Sasan (authoraut) Farris, David (professor directing thesis) Tull, James F. (committee member) Odom, A. Leroy (committee member) Department of Earth, Ocean and Atmospheric Sciences (degree granting department) Florida State University (degree granting institution) |
format |
Text |
title |
Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska |
title_short |
Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska |
title_full |
Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska |
title_fullStr |
Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska |
title_full_unstemmed |
Detrital Zircon Dating of the Kodiak Accretionary Complex; South Alaska |
title_sort |
detrital zircon dating of the kodiak accretionary complex; south alaska |
publisher |
Tallahassee, Florida: Florida State University |
publishDate |
2011 |
url |
https://diginole.lib.fsu.edu/islandora/object/fsu%3A254086/datastream/TN/view/Detrital%20Zircon%20Dating%20of%20the%20Kodiak%20Accretionary%20Complex%3B%20South%20Alaska.jpg |
genre |
Kodiak Alaska |
genre_facet |
Kodiak Alaska |
op_relation |
fsu:254086 (IID) FSU_migr_etd-2788 (URL) http://purl.flvc.org/fsu/fd/FSU_migr_etd-2788 https://diginole.lib.fsu.edu/islandora/object/fsu%3A254086/datastream/TN/view/Detrital%20Zircon%20Dating%20of%20the%20Kodiak%20Accretionary%20Complex%3B%20South%20Alaska.jpg |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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