東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Anatexis and crustal differentiation...

Yakymchuk, Christopher John Anthony.

FindBook

Google Book

Amazon

博客來

Anatexis and crustal differentiation: insights from the Fosdick migmatite--granite complex, West Antarctica.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Anatexis and crustal differentiation: insights from the Fosdick migmatite--granite complex, West Antarctica./
作者:	Yakymchuk, Christopher John Anthony.
面頁冊數:	605 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.
Contained By:	Dissertation Abstracts International76-03B(E).
標題:	Geology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3644216
ISBN:	9781321322835

Anatexis and crustal differentiation: insights from the Fosdick migmatite--granite complex, West Antarctica.
Yakymchuk, Christopher John Anthony.

Anatexis and crustal differentiation: insights from the Fosdick migmatite--granite complex, West Antarctica. - 605 p.

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

Thesis (Ph.D.)--University of Maryland, College Park, 2014.

This item must not be sold to any third party vendors.

In the Fosdick migmatite--granite complex of West Antarctica, U--Pb geochronology of monazite in migmatites and zircon in granites records two episodes of high-temperature metamorphism, one in the Devonian--Carboniferous and another in the Cretaceous. For the older lower-grade event, whole-rock and zircon isotope geochemistry of granites within the Fosdick complex are interpreted to record crustal reworking during metamorphism associated with continental arc magmatism along the East Gondwana convergent plate margin. By contrast, the geochemistry of correlative granites suites from along and across the same margin indicates a greater proportion of crustal growth. This suggests prominent arc-parallel and arc-normal variations in the mechanisms of crustal reworking versus growth in continental arc systems.

ISBN: 9781321322835Subjects--Topical Terms:

516570
Geology.

Anatexis and crustal differentiation: insights from the Fosdick migmatite--granite complex, West Antarctica.
LDR:03481nmm a2200337 4500 001 1988044
005 20150716112201.5
008 150803s2014 ||||||||||||||||| ||eng d
020 $a 9781321322835
035 $a (MiAaPQ)AAI3644216
035 $a AAI3644216
040 $a MiAaPQ $c MiAaPQ
100 1 $a Yakymchuk, Christopher John Anthony. $3 2122896
245 1 0 $a Anatexis and crustal differentiation: insights from the Fosdick migmatite--granite complex, West Antarctica.
300 $a 605 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.
500 $a Adviser: Michael Brown.
502 $a Thesis (Ph.D.)--University of Maryland, College Park, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a In the Fosdick migmatite--granite complex of West Antarctica, U--Pb geochronology of monazite in migmatites and zircon in granites records two episodes of high-temperature metamorphism, one in the Devonian--Carboniferous and another in the Cretaceous. For the older lower-grade event, whole-rock and zircon isotope geochemistry of granites within the Fosdick complex are interpreted to record crustal reworking during metamorphism associated with continental arc magmatism along the East Gondwana convergent plate margin. By contrast, the geochemistry of correlative granites suites from along and across the same margin indicates a greater proportion of crustal growth. This suggests prominent arc-parallel and arc-normal variations in the mechanisms of crustal reworking versus growth in continental arc systems.
520 $a Based on garnet Lu--Hf ages, the timing of peak metamorphism in the younger higher-grade event has been determined as c. 116--111 Ma. U--Pb ages of monazite from migmatites and zircon from anatectic granites suggest that exhumation of the complex as a gneiss dome occurred during the interval c. 107--100 Ma. Contemporaneous exhumation of high-grade metamorphic rocks in the Western Province of New Zealand suggests that intracontinental extension preceded the final breakup of New Zealand from West Antarctica by c. 25 Myr.
520 $a Melt migration through and emplacement within the Fosdick complex during Cretaceous metamorphism was accomplished via a self-organized melt network controlled by the regional stress field and anisotropy of the host rocks. Granites within this network and in sills at shallower crustal levels have microstructures and chemistry consistent with a cumulate origin, and are interpreted to record fractional crystallization during magma ascent and doming related to exhumation.
520 $a Phase equilibria modeling of open system melting during prograde metamorphism is used to quantify the reduced fertility of source rocks during high-temperature exhumation and later overprinting orogenic events. Quantitative modelling of the dissolution of zircon and monazite during prograde melting demonstrates that accessory minerals are expected to be partially to completely consumed up to the metamorphic peak. New growth of these minerals in migmatite melanosomes is predicted to be limited during cooling, whereas leucosomes and anatectic granites are predicted to contain new zircon and monazite growth.
590 $a School code: 0117.
650 4 $a Geology. $3 516570
650 4 $a Petrology. $3 535210
650 4 $a Geochemistry. $3 539092
690 $a 0372
690 $a 0584
690 $a 0996
710 2 $a University of Maryland, College Park. $b Geology. $3 1269314
773 0 $t Dissertation Abstracts International $g 76-03B(E).
790 $a 0117
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3644216