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Rapid conversion from spreading to s...

Keenan, Timothy E.

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Rapid conversion from spreading to subduction: Structural, geochemical, and geochronological studies in Palawan, Philippines.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Rapid conversion from spreading to subduction: Structural, geochemical, and geochronological studies in Palawan, Philippines./
Author:	Keenan, Timothy E.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	117 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
Contained By:	Dissertation Abstracts International78-05B(E).
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10251558
ISBN:	9781369484014

Rapid conversion from spreading to subduction: Structural, geochemical, and geochronological studies in Palawan, Philippines.
Keenan, Timothy E.

Rapid conversion from spreading to subduction: Structural, geochemical, and geochronological studies in Palawan, Philippines. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 117 p.

Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.

Thesis (Ph.D.)--Saint Louis University, 2016.

Where and how do subduction zones start? This essential question is vital to our understanding of plate tectonics and the evolution of Earth, but the process of subduction initiation is not currently well understood. In the following dissertation, this fundamental topic is addressed.

ISBN: 9781369484014Subjects--Topical Terms:

516570
Geology.

Rapid conversion from spreading to subduction: Structural, geochemical, and geochronological studies in Palawan, Philippines.
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100 1 $a Keenan, Timothy E. $3 3284867
245 1 0 $a Rapid conversion from spreading to subduction: Structural, geochemical, and geochronological studies in Palawan, Philippines.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 117 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
500 $a Adviser: John Encarnacion.
502 $a Thesis (Ph.D.)--Saint Louis University, 2016.
520 $a Where and how do subduction zones start? This essential question is vital to our understanding of plate tectonics and the evolution of Earth, but the process of subduction initiation is not currently well understood. In the following dissertation, this fundamental topic is addressed.
520 $a The work presented here focuses on the island of Palawan, Philippines which is thought to be the site of short-lived, Cenozoic subduction. Central Palawan itself is composed of rock types of two distinct origins (ophiolitic igneous/metamorphic rock and continentally derived sedimentary/metasedimentary rock). Currently, no recent work exists that focuses on placing the geology of central Palawan into the proper context of subduction and the Cenozoic evolution of SE Asia. The two basic unresolved questions addressed in this study are: (1) What is the relationship and significance of the sedimentary/metasedimentary rocks exposed in central Palawan with the ophiolite, and (2) how and in what tectonic setting did subduction initiate in Palawan? This work is presented in two chapters, which were written separately for the intent of individual publication.
520 $a The first chapter addresses the relationship of the central Palawan ophiolite to the sedimentary/metasedimentary rocks by presenting new geologic observations and field measurements from central Palawan. A review of the geology of Palawan and surrounding areas is also provided. This is an important contribution because no published work yet exists that provides both a current review of the geology of central Palawan and places the rocks and structures seen in Palawan into the larger tectonic context within Southeast Asia. This critical contribution firmly places Palawan rocks in a subduction-accretion-collision setting.
520 $a The second chapter addresses how and where subduction began in Palawan. In addition to this regional-specific contribution, the work provides a blueprint for other researchers interested in addressing this previously elusive question and testing how and in what tectonic setting other ancient subduction zones may have initiated. The appendix contains a comment relevant to resolving the general problem of subduction initiation. In essence, it highlights the fact that many tests for subduction initiation have been proposed, yet, until this work, few have succeeded.
590 $a School code: 0193.
650 4 $a Geology. $3 516570
650 4 $a Geophysics. $3 535228
650 4 $a Plate tectonics. $3 542702
690 $a 0372
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710 2 $a Saint Louis University. $b Geoscience. $3 1677473
773 0 $t Dissertation Abstracts International $g 78-05B(E).
790 $a 0193
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10251558