Caledonian metamorphism of metasediments from Franz Josef Land
The petrography, detrital zircon age distribution and 40 Ar– 39 Ar ages of three samples from the Nagurskaya drill core of westernmost Franz Josef Land have been analyzed and are compared to similar rocks from the Lomonosov Ridge. The analyzed rocks, from near the base of the drill hole, consist of...
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ftopenunivgb:oai:oro.open.ac.uk:67125 2023-06-11T04:11:22+02:00 Caledonian metamorphism of metasediments from Franz Josef Land Knudsen, Christian Gee, David G. Sherlock, Sarah C. Yu, Li 2019 https://oro.open.ac.uk/67125/ https://doi.org/10.1080/11035897.2019.1622151 unknown Informa UK Limited Knudsen, Christian; Gee, David G.; Sherlock, Sarah C. <http://oro.open.ac.uk/view/person/scs35.html> and Yu, Li (2019). Caledonian metamorphism of metasediments from Franz Josef Land. GFF, 141(4) pp. 295–307. Journal Item None PeerReviewed 2019 ftopenunivgb https://doi.org/10.1080/11035897.2019.1622151 2023-05-28T06:02:25Z The petrography, detrital zircon age distribution and 40 Ar– 39 Ar ages of three samples from the Nagurskaya drill core of westernmost Franz Josef Land have been analyzed and are compared to similar rocks from the Lomonosov Ridge. The analyzed rocks, from near the base of the drill hole, consist of fine-grained psammitic to semipelitic schists, metamorphosed under greenschist-facies conditions. They are lithologically very similar to the recently analyzed metasediments from the Lomonosov Ridge. The detrital zircon age spectra of the samples from both the Lomonosov Ridge and beneath Franz Josef Land span the Meso- to Palaeoproterozoic with a main peak around 1.6 Ga, similar to lower Neoproterozoic metasedimentary rocks in East Greenland, on Svalbard and northern Norway, as well as from Cambrian sediments in Estonia and Silurian–Devonian sediments on Novaya Zemlya. Biotite in metasedimentary rocks from the Nagurskaya drill core indicate an Early Devonian 40 Ar– 39 Ar metamorphic age of c. 400 Ma, possibly superimposed on an earlier, Ordovician history similar to that of the metasediments from the Lomonosov Ridge at 470 Ma. Previously published 40 Ar– 39 Ar analyses of Nagurskaya muscovite yielded c. 600 Ma ages, characteristic of the Timanian Orogen. Together with the new biotite data, these isotope ages favor the interpretation that the Caledonian suture is located between Svalbard and Franz Josef Land, and the Caledonian deformation front between the latter and Novaya Zemlya. Article in Journal/Newspaper East Greenland Franz Josef Land Greenland Lomonosov Ridge Northern Norway Novaya Zemlya Svalbard The Open University: Open Research Online (ORO) Svalbard Greenland Norway Franz Josef Land ENVELOPE(55.000,55.000,81.000,81.000) GFF 141 4 295 307 |
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Open Polar |
collection |
The Open University: Open Research Online (ORO) |
op_collection_id |
ftopenunivgb |
language |
unknown |
description |
The petrography, detrital zircon age distribution and 40 Ar– 39 Ar ages of three samples from the Nagurskaya drill core of westernmost Franz Josef Land have been analyzed and are compared to similar rocks from the Lomonosov Ridge. The analyzed rocks, from near the base of the drill hole, consist of fine-grained psammitic to semipelitic schists, metamorphosed under greenschist-facies conditions. They are lithologically very similar to the recently analyzed metasediments from the Lomonosov Ridge. The detrital zircon age spectra of the samples from both the Lomonosov Ridge and beneath Franz Josef Land span the Meso- to Palaeoproterozoic with a main peak around 1.6 Ga, similar to lower Neoproterozoic metasedimentary rocks in East Greenland, on Svalbard and northern Norway, as well as from Cambrian sediments in Estonia and Silurian–Devonian sediments on Novaya Zemlya. Biotite in metasedimentary rocks from the Nagurskaya drill core indicate an Early Devonian 40 Ar– 39 Ar metamorphic age of c. 400 Ma, possibly superimposed on an earlier, Ordovician history similar to that of the metasediments from the Lomonosov Ridge at 470 Ma. Previously published 40 Ar– 39 Ar analyses of Nagurskaya muscovite yielded c. 600 Ma ages, characteristic of the Timanian Orogen. Together with the new biotite data, these isotope ages favor the interpretation that the Caledonian suture is located between Svalbard and Franz Josef Land, and the Caledonian deformation front between the latter and Novaya Zemlya. |
format |
Article in Journal/Newspaper |
author |
Knudsen, Christian Gee, David G. Sherlock, Sarah C. Yu, Li |
spellingShingle |
Knudsen, Christian Gee, David G. Sherlock, Sarah C. Yu, Li Caledonian metamorphism of metasediments from Franz Josef Land |
author_facet |
Knudsen, Christian Gee, David G. Sherlock, Sarah C. Yu, Li |
author_sort |
Knudsen, Christian |
title |
Caledonian metamorphism of metasediments from Franz Josef Land |
title_short |
Caledonian metamorphism of metasediments from Franz Josef Land |
title_full |
Caledonian metamorphism of metasediments from Franz Josef Land |
title_fullStr |
Caledonian metamorphism of metasediments from Franz Josef Land |
title_full_unstemmed |
Caledonian metamorphism of metasediments from Franz Josef Land |
title_sort |
caledonian metamorphism of metasediments from franz josef land |
publisher |
Informa UK Limited |
publishDate |
2019 |
url |
https://oro.open.ac.uk/67125/ https://doi.org/10.1080/11035897.2019.1622151 |
long_lat |
ENVELOPE(55.000,55.000,81.000,81.000) |
geographic |
Svalbard Greenland Norway Franz Josef Land |
geographic_facet |
Svalbard Greenland Norway Franz Josef Land |
genre |
East Greenland Franz Josef Land Greenland Lomonosov Ridge Northern Norway Novaya Zemlya Svalbard |
genre_facet |
East Greenland Franz Josef Land Greenland Lomonosov Ridge Northern Norway Novaya Zemlya Svalbard |
op_relation |
Knudsen, Christian; Gee, David G.; Sherlock, Sarah C. <http://oro.open.ac.uk/view/person/scs35.html> and Yu, Li (2019). Caledonian metamorphism of metasediments from Franz Josef Land. GFF, 141(4) pp. 295–307. |
op_doi |
https://doi.org/10.1080/11035897.2019.1622151 |
container_title |
GFF |
container_volume |
141 |
container_issue |
4 |
container_start_page |
295 |
op_container_end_page |
307 |
_version_ |
1768386354743345152 |