Geology of three dioritic plutons in Velfjord, Nordland.
Dioritic plutons in the Velfjord area of Nordland intrude calc-silicates and migmatitic pelites of the Helgeland Nappe Complex (HNC). The three largest plutons were emplaced in a zone of NNW-SSE regional strike rather than the more typical NE-SW strike. The plutons postdate Caledonian F2 structures;...
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ftnorgesgu:oai:openarchive.ngu.no:11250/2674114 2023-05-15T16:34:08+02:00 Geology of three dioritic plutons in Velfjord, Nordland. Barnes, Calvin G. Barnes, Melanie A. Nordgulen, Øystein Prestvik, Tore 1992 application/pdf https://hdl.handle.net/11250/2674114 nor nor NGU Bulletin (423) https://hdl.handle.net/11250/2674114 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 41-54 KALEDONSKE FJELLKJEDE DIORITT Journal article 1992 ftnorgesgu 2022-07-03T15:27:28Z Dioritic plutons in the Velfjord area of Nordland intrude calc-silicates and migmatitic pelites of the Helgeland Nappe Complex (HNC). The three largest plutons were emplaced in a zone of NNW-SSE regional strike rather than the more typical NE-SW strike. The plutons postdate Caledonian F2 structures; however, anatectic granites increase in abundance toward the plutons, which suggests emplacement and subsequent partial melting of the pelitic host rocks soon after peak metamorphism. The dioritic and granitic bodies were deformed with interstitial melt present; deformation continued during cooling to greenschist facies conditions. Structural position, style and timing of deformation, and assymetric zoning of the plutons are consistent with intrusion into a dilatant part of a regional sinistral shear zone. 35716 Article in Journal/Newspaper Helgeland Nordland Nordland Nordland NGU Open Archive (Geological Survey of Norway) Helgeland Velfjord ENVELOPE(12.522,12.522,65.405,65.405) |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
Norwegian |
topic |
KALEDONSKE FJELLKJEDE DIORITT |
spellingShingle |
KALEDONSKE FJELLKJEDE DIORITT Barnes, Calvin G. Barnes, Melanie A. Nordgulen, Øystein Prestvik, Tore Geology of three dioritic plutons in Velfjord, Nordland. |
topic_facet |
KALEDONSKE FJELLKJEDE DIORITT |
description |
Dioritic plutons in the Velfjord area of Nordland intrude calc-silicates and migmatitic pelites of the Helgeland Nappe Complex (HNC). The three largest plutons were emplaced in a zone of NNW-SSE regional strike rather than the more typical NE-SW strike. The plutons postdate Caledonian F2 structures; however, anatectic granites increase in abundance toward the plutons, which suggests emplacement and subsequent partial melting of the pelitic host rocks soon after peak metamorphism. The dioritic and granitic bodies were deformed with interstitial melt present; deformation continued during cooling to greenschist facies conditions. Structural position, style and timing of deformation, and assymetric zoning of the plutons are consistent with intrusion into a dilatant part of a regional sinistral shear zone. 35716 |
format |
Article in Journal/Newspaper |
author |
Barnes, Calvin G. Barnes, Melanie A. Nordgulen, Øystein Prestvik, Tore |
author_facet |
Barnes, Calvin G. Barnes, Melanie A. Nordgulen, Øystein Prestvik, Tore |
author_sort |
Barnes, Calvin G. |
title |
Geology of three dioritic plutons in Velfjord, Nordland. |
title_short |
Geology of three dioritic plutons in Velfjord, Nordland. |
title_full |
Geology of three dioritic plutons in Velfjord, Nordland. |
title_fullStr |
Geology of three dioritic plutons in Velfjord, Nordland. |
title_full_unstemmed |
Geology of three dioritic plutons in Velfjord, Nordland. |
title_sort |
geology of three dioritic plutons in velfjord, nordland. |
publishDate |
1992 |
url |
https://hdl.handle.net/11250/2674114 |
long_lat |
ENVELOPE(12.522,12.522,65.405,65.405) |
geographic |
Helgeland Velfjord |
geographic_facet |
Helgeland Velfjord |
genre |
Helgeland Nordland Nordland Nordland |
genre_facet |
Helgeland Nordland Nordland Nordland |
op_source |
41-54 |
op_relation |
NGU Bulletin (423) https://hdl.handle.net/11250/2674114 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1766023891473399808 |