Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands
The study was inspired by information on Paleozoic andesites, dacites, and diabases on the Belkovsky Island in the 1974 geological survey reports used to reconstruct tectonic evolution of the continental block comprising the New Siberian Islands and the bordering shelf. We did not find felsic volcan...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.783103 2023-05-15T17:15:02+02:00 Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands Kuzmichev, A B Goldyrev, A E MEDIAN LATITUDE: 75.685640 * MEDIAN LONGITUDE: 135.687530 * SOUTH-BOUND LATITUDE: 75.522000 * WEST-BOUND LONGITUDE: 135.616000 * NORTH-BOUND LATITUDE: 75.768000 * EAST-BOUND LONGITUDE: 135.793000 2008-05-25 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.783103 https://doi.org/10.1594/PANGAEA.783103 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.783103 https://doi.org/10.1594/PANGAEA.783103 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Geological Institute, Russian Academy of Sciences, Moscow Supplement to: Kuzmichev, A B; Goldyrev, A E (2008): Permian-Triassic trap magmatism in Bel'kov Island (New Siberian Islands). Translated from Geologiya i Geofizika, 2007, 48(2), 216-228, Russian Geology and Geophysics, 48(2), 167-176, https://doi.org/10.1016/j.rgg.2007.02.002 Archive of Ocean Data ARCOD Belkovsky Island New Siberian Islands KG07-210 KG07-524 KG07-568 KG07-569 KG07-629 KG07-699 KG07-722 KG07-756 KG07-883 KG07-884 Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.783103 https://doi.org/10.1016/j.rgg.2007.02.002 2023-01-20T07:32:33Z The study was inspired by information on Paleozoic andesites, dacites, and diabases on the Belkovsky Island in the 1974 geological survey reports used to reconstruct tectonic evolution of the continental block comprising the New Siberian Islands and the bordering shelf. We did not find felsic volcanics or Middle Paleozoic intrusions in the studied area of the island. Igneous rocks are mafic subvolcanic intrusions including dikes, randomly shaped bodies, explosion breccias, and peperites. They belong to the tholeiitic series and are similar to Siberian traps in petrography and trace-element compositions, with high LREE and LILE and prominent Nb negative anomalies. The island arc affinity is due to continental crust contamination of mantle magma and its long evolution in chambers at different depths. K-Ar biotite age (252+/-5 Ma) of magmatism indicates that it was coeval to the main stage of trap magmatism in the Siberian craton at the Permian-Triassic boundary. The terrane including the New Siberian Islands occurred on the periphery of the Siberian trap province where magmatism acted in rifting environment. Magma intruded into semiliquid wet sediments at shallow depths shortly after their deposition. Therefore, the exposed Paleozoic section in Belkovsky Island may include Permian or possibly Lower Triassic sediments of younger ages than it was believed earlier. Dataset New Siberian Islands Belkovsky Island PANGAEA - Data Publisher for Earth & Environmental Science New Siberian Islands ENVELOPE(142.000,142.000,75.000,75.000) ENVELOPE(135.616000,135.793000,75.768000,75.522000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Archive of Ocean Data ARCOD Belkovsky Island New Siberian Islands KG07-210 KG07-524 KG07-568 KG07-569 KG07-629 KG07-699 KG07-722 KG07-756 KG07-883 KG07-884 |
spellingShingle |
Archive of Ocean Data ARCOD Belkovsky Island New Siberian Islands KG07-210 KG07-524 KG07-568 KG07-569 KG07-629 KG07-699 KG07-722 KG07-756 KG07-883 KG07-884 Kuzmichev, A B Goldyrev, A E Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands |
topic_facet |
Archive of Ocean Data ARCOD Belkovsky Island New Siberian Islands KG07-210 KG07-524 KG07-568 KG07-569 KG07-629 KG07-699 KG07-722 KG07-756 KG07-883 KG07-884 |
description |
The study was inspired by information on Paleozoic andesites, dacites, and diabases on the Belkovsky Island in the 1974 geological survey reports used to reconstruct tectonic evolution of the continental block comprising the New Siberian Islands and the bordering shelf. We did not find felsic volcanics or Middle Paleozoic intrusions in the studied area of the island. Igneous rocks are mafic subvolcanic intrusions including dikes, randomly shaped bodies, explosion breccias, and peperites. They belong to the tholeiitic series and are similar to Siberian traps in petrography and trace-element compositions, with high LREE and LILE and prominent Nb negative anomalies. The island arc affinity is due to continental crust contamination of mantle magma and its long evolution in chambers at different depths. K-Ar biotite age (252+/-5 Ma) of magmatism indicates that it was coeval to the main stage of trap magmatism in the Siberian craton at the Permian-Triassic boundary. The terrane including the New Siberian Islands occurred on the periphery of the Siberian trap province where magmatism acted in rifting environment. Magma intruded into semiliquid wet sediments at shallow depths shortly after their deposition. Therefore, the exposed Paleozoic section in Belkovsky Island may include Permian or possibly Lower Triassic sediments of younger ages than it was believed earlier. |
format |
Dataset |
author |
Kuzmichev, A B Goldyrev, A E |
author_facet |
Kuzmichev, A B Goldyrev, A E |
author_sort |
Kuzmichev, A B |
title |
Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands |
title_short |
Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands |
title_full |
Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands |
title_fullStr |
Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands |
title_full_unstemmed |
Age and chemical composition of magmatic rocks from the Belkovsky Island, New Siberian Islands |
title_sort |
age and chemical composition of magmatic rocks from the belkovsky island, new siberian islands |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.783103 https://doi.org/10.1594/PANGAEA.783103 |
op_coverage |
MEDIAN LATITUDE: 75.685640 * MEDIAN LONGITUDE: 135.687530 * SOUTH-BOUND LATITUDE: 75.522000 * WEST-BOUND LONGITUDE: 135.616000 * NORTH-BOUND LATITUDE: 75.768000 * EAST-BOUND LONGITUDE: 135.793000 |
long_lat |
ENVELOPE(142.000,142.000,75.000,75.000) ENVELOPE(135.616000,135.793000,75.768000,75.522000) |
geographic |
New Siberian Islands |
geographic_facet |
New Siberian Islands |
genre |
New Siberian Islands Belkovsky Island |
genre_facet |
New Siberian Islands Belkovsky Island |
op_source |
Geological Institute, Russian Academy of Sciences, Moscow Supplement to: Kuzmichev, A B; Goldyrev, A E (2008): Permian-Triassic trap magmatism in Bel'kov Island (New Siberian Islands). Translated from Geologiya i Geofizika, 2007, 48(2), 216-228, Russian Geology and Geophysics, 48(2), 167-176, https://doi.org/10.1016/j.rgg.2007.02.002 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.783103 https://doi.org/10.1594/PANGAEA.783103 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.783103 https://doi.org/10.1016/j.rgg.2007.02.002 |
_version_ |
1766073195310350336 |