GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES
Mineral chemistry and thermobarometry of mafic pods in the Liverpool Land Eclogite Terrane (LLET) provide insight into potential relationships with regional high-pressure (HP) and ultrahigh-pressure (UHP) terranes such as the North East Greenland Eclogite Province (NEGEP), the Western Gneiss Region...
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ftunivkentucky:oai:uknowledge.uky.edu:ees_etds-1010 2023-05-15T16:03:31+02:00 GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES RiCharde, Gabriel E 2012-01-01T08:00:00Z application/pdf https://uknowledge.uky.edu/ees_etds/10 https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1010&context=ees_etds unknown UKnowledge https://uknowledge.uky.edu/ees_etds/10 https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1010&context=ees_etds Theses and Dissertations--Earth and Environmental Sciences East Greenland Caledonides Liverpool Land Eclogite Terrane eclogite jadeite P-T path Geology text 2012 ftunivkentucky 2021-08-29T16:24:59Z Mineral chemistry and thermobarometry of mafic pods in the Liverpool Land Eclogite Terrane (LLET) provide insight into potential relationships with regional high-pressure (HP) and ultrahigh-pressure (UHP) terranes such as the North East Greenland Eclogite Province (NEGEP), the Western Gneiss Region (WGR), and HP granulites in the East Greenland Caledonides at Payer Land. Grt-cpx thermometry and jadeite barometry performed on garnet and omphacite cores in a sequence of retrogressed eclogites give minimum and average P-T values across six samples for eclogite at 18.4 ± 3.7 kbar at 764 ± 156 °C. Granulite facies conditions based on early retrograde Opx-Plag symplectites, garnet rim compositions, and relict omphacite grains give P-T values at 12.7 ± 0.6 kbar at 860 ± 10 °C, based on grt-cpx thermometry and the opx-grt-pl-qtz equilibra. Late retrograde amphibolite facies conditions, marked by matrix plagioclase and biotite and orthopyroxene symplectite replacement by hornblende symplectites, give mean P-T values of 6.8 ± 0.4 kbar at 740 ± 150 °C, based on grt-cpx thermometry and the grt-hbl-plag-qtz equilibra. Thermometers and barometers yield a qualitative P-T path from lower eclogite facies pressures through the granulite facies via hot isothermal and static decompression, preserving symplectite textures, to amphibolite facies conditions via isobaric cooling. The path is consistent with low-pressure WGR eclogites and suggests affinities between the LLET and Baltica. Text East Greenland Greenland University of Kentucky: UKnowledge Greenland Liverpool Land ENVELOPE(-22.200,-22.200,70.917,70.917) Payer Land ENVELOPE(-22.417,-22.417,74.500,74.500) |
institution |
Open Polar |
collection |
University of Kentucky: UKnowledge |
op_collection_id |
ftunivkentucky |
language |
unknown |
topic |
East Greenland Caledonides Liverpool Land Eclogite Terrane eclogite jadeite P-T path Geology |
spellingShingle |
East Greenland Caledonides Liverpool Land Eclogite Terrane eclogite jadeite P-T path Geology RiCharde, Gabriel E GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES |
topic_facet |
East Greenland Caledonides Liverpool Land Eclogite Terrane eclogite jadeite P-T path Geology |
description |
Mineral chemistry and thermobarometry of mafic pods in the Liverpool Land Eclogite Terrane (LLET) provide insight into potential relationships with regional high-pressure (HP) and ultrahigh-pressure (UHP) terranes such as the North East Greenland Eclogite Province (NEGEP), the Western Gneiss Region (WGR), and HP granulites in the East Greenland Caledonides at Payer Land. Grt-cpx thermometry and jadeite barometry performed on garnet and omphacite cores in a sequence of retrogressed eclogites give minimum and average P-T values across six samples for eclogite at 18.4 ± 3.7 kbar at 764 ± 156 °C. Granulite facies conditions based on early retrograde Opx-Plag symplectites, garnet rim compositions, and relict omphacite grains give P-T values at 12.7 ± 0.6 kbar at 860 ± 10 °C, based on grt-cpx thermometry and the opx-grt-pl-qtz equilibra. Late retrograde amphibolite facies conditions, marked by matrix plagioclase and biotite and orthopyroxene symplectite replacement by hornblende symplectites, give mean P-T values of 6.8 ± 0.4 kbar at 740 ± 150 °C, based on grt-cpx thermometry and the grt-hbl-plag-qtz equilibra. Thermometers and barometers yield a qualitative P-T path from lower eclogite facies pressures through the granulite facies via hot isothermal and static decompression, preserving symplectite textures, to amphibolite facies conditions via isobaric cooling. The path is consistent with low-pressure WGR eclogites and suggests affinities between the LLET and Baltica. |
format |
Text |
author |
RiCharde, Gabriel E |
author_facet |
RiCharde, Gabriel E |
author_sort |
RiCharde, Gabriel E |
title |
GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES |
title_short |
GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES |
title_full |
GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES |
title_fullStr |
GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES |
title_full_unstemmed |
GEOTHERMOBAROMETRIC ANALYSIS AND TECTONIC EVOLUTION OF THE LIVERPOOL LAND ECLOGITES, EAST GREENLAND CALEDONIDES |
title_sort |
geothermobarometric analysis and tectonic evolution of the liverpool land eclogites, east greenland caledonides |
publisher |
UKnowledge |
publishDate |
2012 |
url |
https://uknowledge.uky.edu/ees_etds/10 https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1010&context=ees_etds |
long_lat |
ENVELOPE(-22.200,-22.200,70.917,70.917) ENVELOPE(-22.417,-22.417,74.500,74.500) |
geographic |
Greenland Liverpool Land Payer Land |
geographic_facet |
Greenland Liverpool Land Payer Land |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
Theses and Dissertations--Earth and Environmental Sciences |
op_relation |
https://uknowledge.uky.edu/ees_etds/10 https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1010&context=ees_etds |
_version_ |
1766399203646373888 |