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Genesis and Evolution of the Pamir P...

Stearns, Michael A.

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Genesis and Evolution of the Pamir Plateau: a Petrochronologic View.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Genesis and Evolution of the Pamir Plateau: a Petrochronologic View./
Author:	Stearns, Michael A.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2014,
Description:	88 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.
Contained By:	Dissertation Abstracts International76-03B(E).
Subject:	Petrology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3645706
ISBN:	9781321350210

Genesis and Evolution of the Pamir Plateau: a Petrochronologic View.
Stearns, Michael A.

Genesis and Evolution of the Pamir Plateau: a Petrochronologic View. - Ann Arbor : ProQuest Dissertations & Theses, 2014 - 88 p.

Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.

Thesis (Ph.D.)--University of California, Santa Barbara, 2014.

This item is not available from ProQuest Dissertations & Theses.

The India-Asia collision is the foremost setting to study continent-continent orogenesis, yet mid--deep crustal exposures are rare. In contrast, the Pamir Plateau provides extensive aerial exposure of the deep crust within six gneiss domes. The domes contain a variety of Cenozoic-age metamorphic and igneous rocks exhumed from 8--10 kbar and ≥700 °C. The growth and recrystallization of major and accessory phases in these rocks such as garnet, monazite, and titanite record a robust history of the evolution of the plateau through crustal thickening, metamorphism, and subsequent ongoing collapse. Extracting this record requires accurately understanding and directly linking minerals response to the crustal process of interest. Petrochronology by in situ U/Th-Pb chronometry, trace-element analysis, and thermobarometry is the key to unlocking the physiochemical evolution of the Pamir mid-- deep crust, and orogenic processes in general around the world. The following dissertation contains I) an evaluation of whether titanite records volume-diffusion closure or (re)crystallization, II) a comparison of the monazite record from the Central Pamir and Northern Himalaya gneiss domes, and III) campaign-style titanite petrochronology investigation of the onset of collapse in the Pamir plateau.

ISBN: 9781321350210Subjects--Topical Terms:

535210
Petrology.

Genesis and Evolution of the Pamir Plateau: a Petrochronologic View.
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245 1 0 $a Genesis and Evolution of the Pamir Plateau: a Petrochronologic View.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2014
300 $a 88 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.
500 $a Includes supplementary digital materials.
500 $a Adviser: Bradley R. Hacker.
502 $a Thesis (Ph.D.)--University of California, Santa Barbara, 2014.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a The India-Asia collision is the foremost setting to study continent-continent orogenesis, yet mid--deep crustal exposures are rare. In contrast, the Pamir Plateau provides extensive aerial exposure of the deep crust within six gneiss domes. The domes contain a variety of Cenozoic-age metamorphic and igneous rocks exhumed from 8--10 kbar and ≥700 °C. The growth and recrystallization of major and accessory phases in these rocks such as garnet, monazite, and titanite record a robust history of the evolution of the plateau through crustal thickening, metamorphism, and subsequent ongoing collapse. Extracting this record requires accurately understanding and directly linking minerals response to the crustal process of interest. Petrochronology by in situ U/Th-Pb chronometry, trace-element analysis, and thermobarometry is the key to unlocking the physiochemical evolution of the Pamir mid-- deep crust, and orogenic processes in general around the world. The following dissertation contains I) an evaluation of whether titanite records volume-diffusion closure or (re)crystallization, II) a comparison of the monazite record from the Central Pamir and Northern Himalaya gneiss domes, and III) campaign-style titanite petrochronology investigation of the onset of collapse in the Pamir plateau.
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