extruded at or just before the Cretaceous-Tertiary boundary. The suite is strongly bimodal with basaltic lavas, comendites and comenditic ash-flow tuffs predominating. The basic lavas are of transitional basalt type but have characteristically alkaline minor-element contents. The riebeckite-bearing...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1029.4719 2023-05-15T14:29:11+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4719 http://jgs.geoscienceworld.org/content/jgs/144/5/707.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4719 http://jgs.geoscienceworld.org/content/jgs/144/5/707.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://jgs.geoscienceworld.org/content/jgs/144/5/707.full.pdf text ftciteseerx 2016-10-30T00:08:13Z extruded at or just before the Cretaceous-Tertiary boundary. The suite is strongly bimodal with basaltic lavas, comendites and comenditic ash-flow tuffs predominating. The basic lavas are of transitional basalt type but have characteristically alkaline minor-element contents. The riebeckite-bearing comendites have strong light REE enrichment and large negative Eu anomalies as commonly found in continental peralkaline suites. As well as the comendites there are other rhyolite lavas and minor intrusions of distinctly different chemistry which are thought to have originated by crustal refusion. The peralkaline nature of the siliceous rocks is in keeping with the extensional tectonic environment suggested by an intense alkali dolerite dyke swarm which immediately preceded the extrusive activity. Association with the development of the Makarov Basin in Cretaceous times is suggested. The Kap Washington Group volcanic rocks are exposed on the north coast of Greenland (Fig. 1) and are important in considerations of the palaeotectonic evolution of the Arctic basin. Previous comments on their significance have been Text Arctic Basin Arctic Greenland Kap Washington makarov basin Unknown Arctic Greenland Kap ENVELOPE(23.567,23.567,65.533,65.533) Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Kap Washington ENVELOPE(-38.000,-38.000,83.517,83.517) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
extruded at or just before the Cretaceous-Tertiary boundary. The suite is strongly bimodal with basaltic lavas, comendites and comenditic ash-flow tuffs predominating. The basic lavas are of transitional basalt type but have characteristically alkaline minor-element contents. The riebeckite-bearing comendites have strong light REE enrichment and large negative Eu anomalies as commonly found in continental peralkaline suites. As well as the comendites there are other rhyolite lavas and minor intrusions of distinctly different chemistry which are thought to have originated by crustal refusion. The peralkaline nature of the siliceous rocks is in keeping with the extensional tectonic environment suggested by an intense alkali dolerite dyke swarm which immediately preceded the extrusive activity. Association with the development of the Makarov Basin in Cretaceous times is suggested. The Kap Washington Group volcanic rocks are exposed on the north coast of Greenland (Fig. 1) and are important in considerations of the palaeotectonic evolution of the Arctic basin. Previous comments on their significance have been |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4719 http://jgs.geoscienceworld.org/content/jgs/144/5/707.full.pdf |
long_lat |
ENVELOPE(23.567,23.567,65.533,65.533) ENVELOPE(170.000,170.000,87.000,87.000) ENVELOPE(-38.000,-38.000,83.517,83.517) |
geographic |
Arctic Greenland Kap Makarov Basin Kap Washington |
geographic_facet |
Arctic Greenland Kap Makarov Basin Kap Washington |
genre |
Arctic Basin Arctic Greenland Kap Washington makarov basin |
genre_facet |
Arctic Basin Arctic Greenland Kap Washington makarov basin |
op_source |
http://jgs.geoscienceworld.org/content/jgs/144/5/707.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4719 http://jgs.geoscienceworld.org/content/jgs/144/5/707.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766303261980098560 |