A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt
Aeromagnetic, geological and geochemical data demonstrate the presence of a high-pressure, granu-le lite-facies gneiss complex about 400 km2 in area within a previously almost unexplored nunatak region between latitudes 74°30 and 75°N in northern East Greenland. The gneiss complex is surrounded and...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.597.6538 2023-05-15T16:03:28+02:00 A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt Hans Christian Larsen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6538 http://2dgf.dk/xpdf/bull29-03-161-174.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6538 http://2dgf.dk/xpdf/bull29-03-161-174.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://2dgf.dk/xpdf/bull29-03-161-174.pdf North-East Greenland (fig. 1). With the excep text ftciteseerx 2016-01-08T13:48:41Z Aeromagnetic, geological and geochemical data demonstrate the presence of a high-pressure, granu-le lite-facies gneiss complex about 400 km2 in area within a previously almost unexplored nunatak region between latitudes 74°30 and 75°N in northern East Greenland. The gneiss complex is surrounded and in part overthrust by supracrustal rocks of very high amphibolite facies, including garnet-clinopyroxene rocks of eclogitic affinity. A magnetically anomalous area is related to exposures of granulite facies rocks, whereas the surrounding supracrustals give rise to a magnetic smooth zone. Several, independent sets of observations indicate that the granulite facies metamorphism and the high amphibolite facies metamor-phism were related to the same metamorphic event. Maximum temperatures of about 740°C and maximum pressures of about 12.5 kb were reached (kyanite formation) later decreasing to about 10 kb (sillimanite formation). Comparisons with other parts of the East Greenland fold belt suggest a probable Archaean origin for the central gneiss complex and an early or middle Proterozoic age for the granulite and amphibolite facies metamorphism. There are no indications of Caledonian metamorphic events, in contrast to the previously assumed Caledonian origin for the area. Text East Greenland Greenland Unknown Greenland |
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North-East Greenland (fig. 1). With the excep |
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North-East Greenland (fig. 1). With the excep Hans Christian Larsen A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt |
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North-East Greenland (fig. 1). With the excep |
description |
Aeromagnetic, geological and geochemical data demonstrate the presence of a high-pressure, granu-le lite-facies gneiss complex about 400 km2 in area within a previously almost unexplored nunatak region between latitudes 74°30 and 75°N in northern East Greenland. The gneiss complex is surrounded and in part overthrust by supracrustal rocks of very high amphibolite facies, including garnet-clinopyroxene rocks of eclogitic affinity. A magnetically anomalous area is related to exposures of granulite facies rocks, whereas the surrounding supracrustals give rise to a magnetic smooth zone. Several, independent sets of observations indicate that the granulite facies metamorphism and the high amphibolite facies metamor-phism were related to the same metamorphic event. Maximum temperatures of about 740°C and maximum pressures of about 12.5 kb were reached (kyanite formation) later decreasing to about 10 kb (sillimanite formation). Comparisons with other parts of the East Greenland fold belt suggest a probable Archaean origin for the central gneiss complex and an early or middle Proterozoic age for the granulite and amphibolite facies metamorphism. There are no indications of Caledonian metamorphic events, in contrast to the previously assumed Caledonian origin for the area. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Hans Christian Larsen |
author_facet |
Hans Christian Larsen |
author_sort |
Hans Christian Larsen |
title |
A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt |
title_short |
A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt |
title_full |
A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt |
title_fullStr |
A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt |
title_full_unstemmed |
A high-pressure granulite fades complex in north-west Payers Land, East Greenland fold belt |
title_sort |
high-pressure granulite fades complex in north-west payers land, east greenland fold belt |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6538 http://2dgf.dk/xpdf/bull29-03-161-174.pdf |
geographic |
Greenland |
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Greenland |
genre |
East Greenland Greenland |
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East Greenland Greenland |
op_source |
http://2dgf.dk/xpdf/bull29-03-161-174.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6538 http://2dgf.dk/xpdf/bull29-03-161-174.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766399132064284672 |