Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica)
Northern Victoria Land is a key area for the Ross Orogen - a Palaeozoic foldbelt formed at the palaeo-Pacific margin of Gondwana. A narrow and discontinuous high- to ultrahigh-pressure (UHP) belt, consisting of mafic and ultramafic rocks (including garnet-bearing types) within a metasedimentary sequ...
Published in: | Journal of Metamorphic Geology |
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Language: | English |
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ftcarletonunivir:oai:carleton.ca:14819 2023-05-15T13:42:01+02:00 Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) Palmeri, R. (R.) Ghiribelli, B. (B.) Ranalli, G. (Giorgio) Talarico, F. (F.) Ricci, C.A. (C. A.) 2007-02-01 https://ir.library.carleton.ca/pub/14819 https://doi.org/10.1111/j.1525-1314.2006.00686.x en eng https://ir.library.carleton.ca/pub/14819 doi:10.1111/j.1525-1314.2006.00686.x Journal of Metamorphic Geology vol. 25 no. 2, pp. 225-243 Antarctica Exhumation Garnet-bearing ultramafic rocks HP/UHP metamorphism Subduction info:eu-repo/semantics/other 2007 ftcarletonunivir https://doi.org/10.1111/j.1525-1314.2006.00686.x 2022-02-06T21:51:23Z Northern Victoria Land is a key area for the Ross Orogen - a Palaeozoic foldbelt formed at the palaeo-Pacific margin of Gondwana. A narrow and discontinuous high- to ultrahigh-pressure (UHP) belt, consisting of mafic and ultramafic rocks (including garnet-bearing types) within a metasedimentary sequence of gneisses and quartzites, is exposed at the Lanterman Range (northern Victoria Land). Garnet-bearing ultramafic rocks evolved through at least six metamorphic stages. Stage 1 is defined by medium-grained garnet+olivine+low-Al orthopyroxene+clinopyroxene, whereas finer-grained garnet+olivine+orthopyroxene+clinopyroxene+amphibole constitutes the stage 2 assemblage. Stage 3 is defined by kelyphites of orthopyroxene+clinopyroxene+spinel±amphibole around garnet. Porphyroblasts of amphibole replacing garnet and clinopyroxene characterize stage 4. Retrograde stages 5 and 6 consist of tremolite+Mg-chlorite±serpentine±talc. A high-temperature (∼950°C), spinel-bearing protolith (stage 0), is identified on the basis of orthopyroxene+clinopyroxene+olivine+spinel+amphibole inclusions within stage 1 garnet. The P-T estimates for stage 1 are indicative of UHP conditions (3.2-3.3 GPa and 764-820°C), whereas stage 2 is constrained between 726-788°C and 2.6-2.9 GPa. St Other/Unknown Material Antarc* Antarctica Victoria Land Carleton University's Institutional Repository Victoria Land Pacific Lanterman Range ENVELOPE(163.167,163.167,-71.667,-71.667) Journal of Metamorphic Geology 25 2 225 243 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
Antarctica Exhumation Garnet-bearing ultramafic rocks HP/UHP metamorphism Subduction |
spellingShingle |
Antarctica Exhumation Garnet-bearing ultramafic rocks HP/UHP metamorphism Subduction Palmeri, R. (R.) Ghiribelli, B. (B.) Ranalli, G. (Giorgio) Talarico, F. (F.) Ricci, C.A. (C. A.) Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) |
topic_facet |
Antarctica Exhumation Garnet-bearing ultramafic rocks HP/UHP metamorphism Subduction |
description |
Northern Victoria Land is a key area for the Ross Orogen - a Palaeozoic foldbelt formed at the palaeo-Pacific margin of Gondwana. A narrow and discontinuous high- to ultrahigh-pressure (UHP) belt, consisting of mafic and ultramafic rocks (including garnet-bearing types) within a metasedimentary sequence of gneisses and quartzites, is exposed at the Lanterman Range (northern Victoria Land). Garnet-bearing ultramafic rocks evolved through at least six metamorphic stages. Stage 1 is defined by medium-grained garnet+olivine+low-Al orthopyroxene+clinopyroxene, whereas finer-grained garnet+olivine+orthopyroxene+clinopyroxene+amphibole constitutes the stage 2 assemblage. Stage 3 is defined by kelyphites of orthopyroxene+clinopyroxene+spinel±amphibole around garnet. Porphyroblasts of amphibole replacing garnet and clinopyroxene characterize stage 4. Retrograde stages 5 and 6 consist of tremolite+Mg-chlorite±serpentine±talc. A high-temperature (∼950°C), spinel-bearing protolith (stage 0), is identified on the basis of orthopyroxene+clinopyroxene+olivine+spinel+amphibole inclusions within stage 1 garnet. The P-T estimates for stage 1 are indicative of UHP conditions (3.2-3.3 GPa and 764-820°C), whereas stage 2 is constrained between 726-788°C and 2.6-2.9 GPa. St |
format |
Other/Unknown Material |
author |
Palmeri, R. (R.) Ghiribelli, B. (B.) Ranalli, G. (Giorgio) Talarico, F. (F.) Ricci, C.A. (C. A.) |
author_facet |
Palmeri, R. (R.) Ghiribelli, B. (B.) Ranalli, G. (Giorgio) Talarico, F. (F.) Ricci, C.A. (C. A.) |
author_sort |
Palmeri, R. (R.) |
title |
Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) |
title_short |
Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) |
title_full |
Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) |
title_fullStr |
Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) |
title_full_unstemmed |
Ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the Lanterman Range (northern Victoria Land, Antarctica) |
title_sort |
ultrahigh-pressure metamorphism and exhumation of garnet-bearing ultramafic rocks from the lanterman range (northern victoria land, antarctica) |
publishDate |
2007 |
url |
https://ir.library.carleton.ca/pub/14819 https://doi.org/10.1111/j.1525-1314.2006.00686.x |
long_lat |
ENVELOPE(163.167,163.167,-71.667,-71.667) |
geographic |
Victoria Land Pacific Lanterman Range |
geographic_facet |
Victoria Land Pacific Lanterman Range |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_source |
Journal of Metamorphic Geology vol. 25 no. 2, pp. 225-243 |
op_relation |
https://ir.library.carleton.ca/pub/14819 doi:10.1111/j.1525-1314.2006.00686.x |
op_doi |
https://doi.org/10.1111/j.1525-1314.2006.00686.x |
container_title |
Journal of Metamorphic Geology |
container_volume |
25 |
container_issue |
2 |
container_start_page |
225 |
op_container_end_page |
243 |
_version_ |
1766161888536690688 |