Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland
The characteristics of Archean metamorphic surfaces and fabrics of a mapped sequence of rocks older than about 3000 Ma provide information basic to an understanding of the structural evolution and metamorphic history in Kangerdlugssuaq Fjord, east Greenland. This information and the additional resul...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19860019075 2023-05-15T16:03:31+02:00 Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland Kays, M. A. Unclassified, Unlimited, Publicly available JAN 1, 1986 application/pdf http://hdl.handle.net/2060/19860019075 unknown Document ID: 19860019075 Accession ID: 86N28547 http://hdl.handle.net/2060/19860019075 No Copyright CASI GEOPHYSICS Lunar and Planetary Inst. Workshop on Early Crustal Genesis: The World's Oldest Rocks; p 63-67 1986 ftnasantrs 2016-06-11T22:52:12Z The characteristics of Archean metamorphic surfaces and fabrics of a mapped sequence of rocks older than about 3000 Ma provide information basic to an understanding of the structural evolution and metamorphic history in Kangerdlugssuaq Fjord, east Greenland. This information and the additional results of petrologic and geochemical studies have culminated in an extended chronology of Archean plutonic, metamorphic, and tectonic events. The basis for the chronology is considered, especially the nature of the metamorphic fabrics and surfaces in the Archean sequence. The surfaces, which are planar mineral parageneses, may prove to be mappable outside Kangerdlugssuaq Fjord, and if so, will be helpful in extending the events that they represent to other Archean sequences in east Greenland. The surfaces will become especially important reference planes if the absolute ages of their metamorphic assemblages can be determined in at least one location where strain was low subsequent to their recrystallization. Once an isochron is obtained, the dynamothermal age of the regionally identifiable metamorphic surface is determined everywhere it can be mapped. Other/Unknown Material East Greenland Greenland NASA Technical Reports Server (NTRS) Greenland |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
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unknown |
topic |
GEOPHYSICS |
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GEOPHYSICS Kays, M. A. Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland |
topic_facet |
GEOPHYSICS |
description |
The characteristics of Archean metamorphic surfaces and fabrics of a mapped sequence of rocks older than about 3000 Ma provide information basic to an understanding of the structural evolution and metamorphic history in Kangerdlugssuaq Fjord, east Greenland. This information and the additional results of petrologic and geochemical studies have culminated in an extended chronology of Archean plutonic, metamorphic, and tectonic events. The basis for the chronology is considered, especially the nature of the metamorphic fabrics and surfaces in the Archean sequence. The surfaces, which are planar mineral parageneses, may prove to be mappable outside Kangerdlugssuaq Fjord, and if so, will be helpful in extending the events that they represent to other Archean sequences in east Greenland. The surfaces will become especially important reference planes if the absolute ages of their metamorphic assemblages can be determined in at least one location where strain was low subsequent to their recrystallization. Once an isochron is obtained, the dynamothermal age of the regionally identifiable metamorphic surface is determined everywhere it can be mapped. |
format |
Other/Unknown Material |
author |
Kays, M. A. |
author_facet |
Kays, M. A. |
author_sort |
Kays, M. A. |
title |
Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland |
title_short |
Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland |
title_full |
Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland |
title_fullStr |
Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland |
title_full_unstemmed |
Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland |
title_sort |
archean metamorphic sequence and surfaces, kangerdlugssuaq fjord, east greenland |
publishDate |
1986 |
url |
http://hdl.handle.net/2060/19860019075 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
CASI |
op_relation |
Document ID: 19860019075 Accession ID: 86N28547 http://hdl.handle.net/2060/19860019075 |
op_rights |
No Copyright |
_version_ |
1766399193220382720 |