Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution
A combined petrological and geochronological study was carried out on mafic granulites and associated felsic gneisses from the McKaskle Hills, eastern Amery Ice Shelf, East Antarctica. Garnet-bearing mafic granulites exhibit reaction textures and exsolution textures that indicate two-stage metamorph...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.630.692 2023-05-15T13:21:59+02:00 Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution Of The Prydz Belt Xiaochun Liu Yue Zhao Guochun Zhao Ping Jian The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.692 http://petrology.oxfordjournals.org/content/48/8/1443.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.692 http://petrology.oxfordjournals.org/content/48/8/1443.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://petrology.oxfordjournals.org/content/48/8/1443.full.pdf text 2006 ftciteseerx 2016-01-08T15:28:16Z A combined petrological and geochronological study was carried out on mafic granulites and associated felsic gneisses from the McKaskle Hills, eastern Amery Ice Shelf, East Antarctica. Garnet-bearing mafic granulites exhibit reaction textures and exsolution textures that indicate two-stage metamorphic evolution. Thermobarometric estimates from matrix and symplectite assemblages yield peak and retrograde P^T conditions of 90^95 kbar and 880^9508C and 66^72 kbar and 700^7508C, respectively. Similar but slightly scattered peak P^Testimates of 79^101kbar and 820^9808C are obtained from the core compositions of minerals from felsic para-and orthogneisses. Evidence for the prograde history is provided by muscovite inclusions in garnet from a paragneiss. Sensitive high-resolution ion microprobe U^Pb zircon dating reveals an evolution-ary history for the granulites, including a mafic and felsic igneous intrusion at 1174^1019Ma, sedimentation after 932^916Ma, and Text Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf Unknown Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica McKaskle Hills ENVELOPE(72.500,72.500,-70.000,-70.000) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
A combined petrological and geochronological study was carried out on mafic granulites and associated felsic gneisses from the McKaskle Hills, eastern Amery Ice Shelf, East Antarctica. Garnet-bearing mafic granulites exhibit reaction textures and exsolution textures that indicate two-stage metamorphic evolution. Thermobarometric estimates from matrix and symplectite assemblages yield peak and retrograde P^T conditions of 90^95 kbar and 880^9508C and 66^72 kbar and 700^7508C, respectively. Similar but slightly scattered peak P^Testimates of 79^101kbar and 820^9808C are obtained from the core compositions of minerals from felsic para-and orthogneisses. Evidence for the prograde history is provided by muscovite inclusions in garnet from a paragneiss. Sensitive high-resolution ion microprobe U^Pb zircon dating reveals an evolution-ary history for the granulites, including a mafic and felsic igneous intrusion at 1174^1019Ma, sedimentation after 932^916Ma, and |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Of The Prydz Belt Xiaochun Liu Yue Zhao Guochun Zhao Ping Jian |
spellingShingle |
Of The Prydz Belt Xiaochun Liu Yue Zhao Guochun Zhao Ping Jian Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution |
author_facet |
Of The Prydz Belt Xiaochun Liu Yue Zhao Guochun Zhao Ping Jian |
author_sort |
Of The Prydz Belt |
title |
Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution |
title_short |
Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution |
title_full |
Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution |
title_fullStr |
Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution |
title_full_unstemmed |
Petrology and Geochronology of Granulites from the McKaskle Hills, Eastern Amery Ice Shelf, Antarctica, and Implications for the Evolution |
title_sort |
petrology and geochronology of granulites from the mckaskle hills, eastern amery ice shelf, antarctica, and implications for the evolution |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.692 http://petrology.oxfordjournals.org/content/48/8/1443.full.pdf |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(72.500,72.500,-70.000,-70.000) |
geographic |
Amery Amery Ice Shelf East Antarctica McKaskle Hills |
geographic_facet |
Amery Amery Ice Shelf East Antarctica McKaskle Hills |
genre |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
genre_facet |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
op_source |
http://petrology.oxfordjournals.org/content/48/8/1443.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.692 http://petrology.oxfordjournals.org/content/48/8/1443.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766362701808795648 |