Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age
A post-tectonic Caledonian granite in southern Ny Friesland has been fully mapped and the following new names are proposed: the Chydeniusbreen granitoid suite, consisting of the Raudberget granitoid body in the north; the Newtontoppen granitoid body in the middle; and the Ekkoknausane granitoid body...
Published in: | Polar Research |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norwegian Polar Institute
1996
|
Subjects: | |
Online Access: | https://polarresearch.net/index.php/polar/article/view/1920 https://doi.org/10.3402/polar.v15i1.6637 |
id |
ftjpolarres:oai:journals.openacademia.net:article/1920 |
---|---|
record_format |
openpolar |
spelling |
ftjpolarres:oai:journals.openacademia.net:article/1920 2023-05-15T17:23:38+02:00 Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age Teben'kov, A. M. Ohta, Y. Balašov, Ju. A. Sirotkin, A. N. 1996-01-06 application/pdf https://polarresearch.net/index.php/polar/article/view/1920 https://doi.org/10.3402/polar.v15i1.6637 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/1920/5169 https://polarresearch.net/index.php/polar/article/view/1920 doi:10.3402/polar.v15i1.6637 Copyright (c) 2018 Polar Research Polar Research; Vol. 15 No. 1 (1996); 67-80 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1996 ftjpolarres https://doi.org/10.3402/polar.v15i1.6637 2021-11-11T19:11:42Z A post-tectonic Caledonian granite in southern Ny Friesland has been fully mapped and the following new names are proposed: the Chydeniusbreen granitoid suite, consisting of the Raudberget granitoid body in the north; the Newtontoppen granitoid body in the middle; and the Ekkoknausane granitoid body in the south The contact relationships, internal structures and distribution of various rock types infer an asymmetric lopolith or a harpolith-like body, a large sickle-shaped intrusion stretched in the direction of general tectonic transport, for the Newtontoppen granitoid body. Seven rock types are described in the Newtontoppen granitoid and four emplacement stages are recognised. The major rock types seem to have an alkali-calcic to alkalic bulk rock chemistry and show a transition between I- and S-type granite derived from anatectic melting of various protoliths under relatively high temperature conditions. Possible later K20 introduction modified the earlier formed rock types. A Rb-Sr whole rock age of 432 ± 10 Ma has been obtained by a seven point isochron with MSDW = 2.59 and an initial Sr isotope ratio = 0.715. This age is approximately 30 Ma older than the previously obtained K-Ar whole rock and Rb-Sr biotite ages, ca. 400 Ma, which represents the period of cooling. The high initial Sr isotope ratio supports the interpretation of an anatectic origin. Article in Journal/Newspaper Newtontoppen Ny Friesland Polar Research Polar Research (E-Journal) Sickle ENVELOPE(-66.783,-66.783,-68.867,-68.867) Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) Newtontoppen ENVELOPE(17.587,17.587,79.002,79.002) Chydeniusbreen ENVELOPE(18.157,18.157,79.220,79.220) Ekkoknausane ENVELOPE(17.450,17.450,78.733,78.733) Polar Research 15 1 67 80 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
A post-tectonic Caledonian granite in southern Ny Friesland has been fully mapped and the following new names are proposed: the Chydeniusbreen granitoid suite, consisting of the Raudberget granitoid body in the north; the Newtontoppen granitoid body in the middle; and the Ekkoknausane granitoid body in the south The contact relationships, internal structures and distribution of various rock types infer an asymmetric lopolith or a harpolith-like body, a large sickle-shaped intrusion stretched in the direction of general tectonic transport, for the Newtontoppen granitoid body. Seven rock types are described in the Newtontoppen granitoid and four emplacement stages are recognised. The major rock types seem to have an alkali-calcic to alkalic bulk rock chemistry and show a transition between I- and S-type granite derived from anatectic melting of various protoliths under relatively high temperature conditions. Possible later K20 introduction modified the earlier formed rock types. A Rb-Sr whole rock age of 432 ± 10 Ma has been obtained by a seven point isochron with MSDW = 2.59 and an initial Sr isotope ratio = 0.715. This age is approximately 30 Ma older than the previously obtained K-Ar whole rock and Rb-Sr biotite ages, ca. 400 Ma, which represents the period of cooling. The high initial Sr isotope ratio supports the interpretation of an anatectic origin. |
format |
Article in Journal/Newspaper |
author |
Teben'kov, A. M. Ohta, Y. Balašov, Ju. A. Sirotkin, A. N. |
spellingShingle |
Teben'kov, A. M. Ohta, Y. Balašov, Ju. A. Sirotkin, A. N. Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age |
author_facet |
Teben'kov, A. M. Ohta, Y. Balašov, Ju. A. Sirotkin, A. N. |
author_sort |
Teben'kov, A. M. |
title |
Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age |
title_short |
Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age |
title_full |
Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age |
title_fullStr |
Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age |
title_full_unstemmed |
Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age |
title_sort |
newtontoppen granitoid rocks, their geology, chemistry and rb-sr age |
publisher |
Norwegian Polar Institute |
publishDate |
1996 |
url |
https://polarresearch.net/index.php/polar/article/view/1920 https://doi.org/10.3402/polar.v15i1.6637 |
long_lat |
ENVELOPE(-66.783,-66.783,-68.867,-68.867) ENVELOPE(16.847,16.847,79.498,79.498) ENVELOPE(17.587,17.587,79.002,79.002) ENVELOPE(18.157,18.157,79.220,79.220) ENVELOPE(17.450,17.450,78.733,78.733) |
geographic |
Sickle Ny Friesland Newtontoppen Chydeniusbreen Ekkoknausane |
geographic_facet |
Sickle Ny Friesland Newtontoppen Chydeniusbreen Ekkoknausane |
genre |
Newtontoppen Ny Friesland Polar Research |
genre_facet |
Newtontoppen Ny Friesland Polar Research |
op_source |
Polar Research; Vol. 15 No. 1 (1996); 67-80 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/1920/5169 https://polarresearch.net/index.php/polar/article/view/1920 doi:10.3402/polar.v15i1.6637 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v15i1.6637 |
container_title |
Polar Research |
container_volume |
15 |
container_issue |
1 |
container_start_page |
67 |
op_container_end_page |
80 |
_version_ |
1766113874419908608 |