GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA)
The latest geological research carried out during seasonal work in 2017 revealed that metamorphosed layered gabbroids, which partially outcrop along the Antarctic Peninsula Coast on Cape Tuxen and Rasmussen Island, compose sheet-like intrusive body of total dimensions more than 3 km2. Significant pa...
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State Institution National Antarctic Scientific Center
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ftdoajarticles:oai:doaj.org/article:25611406089842a4aada304f13739f6f 2023-05-15T13:52:25+02:00 GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) O. V. Mytrokhyn V. G. Bakhmutov A. G. Aleksieienko L. I. Gavryliv T. V. Mytrokhina 2018-06-01T00:00:00Z https://doi.org/10.33275/1727-7485.16.2017.55 https://doaj.org/article/25611406089842a4aada304f13739f6f EN UK eng ukr State Institution National Antarctic Scientific Center http://uaj.uac.gov.ua/index.php/uaj/article/view/55 https://doaj.org/toc/1727-7485 https://doaj.org/toc/2415-3087 1727-7485 2415-3087 doi:10.33275/1727-7485.16.2017.55 https://doaj.org/article/25611406089842a4aada304f13739f6f Український антарктичний журнал, Iss 16, Pp 21-28 (2018) geology of antarctica andean intrusive suite layered intrusions gabbroids Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 article 2018 ftdoajarticles https://doi.org/10.33275/1727-7485.16.2017.55 2022-12-31T00:49:06Z The latest geological research carried out during seasonal work in 2017 revealed that metamorphosed layered gabbroids, which partially outcrop along the Antarctic Peninsula Coast on Cape Tuxen and Rasmussen Island, compose sheet-like intrusive body of total dimensions more than 3 km2. Significant part of the Tuxen-Rasmussen Gabbroid Intrusion (TRGI) is submerged under Waddington Bay. Main objectives of the study were the identification of geological position of the TRGI and the clarification of its geological age. In addition to the field methods of the geological research the samples collected during this and the previous years were studied using optical and electron microscopy techniques in order to identify petrographic and mineralogical features of the gabbroids. Results of the studies confirmed previous observation that TRGI was embedded in Upper Jurassic Volcanic Group (UJVG) of Antarctic Peninsula and it was responsible for contact metamorphism of the UJVG and suffered contamination by volcanic material. Gabbroids and volcanic rocks were later intruded by granites of Late Cretaceous age, which belong to the Andean Intrusive Suite (AIS) of Graham Land. Authors define geological age of TRGI as Early Cretaceous. Previous U-Pb isotope datings of the gabbroids are believed to be “rejuvenated”. It was discovered that TRGI strikes in northeastern direction and dips steep in northwestern direction. It is assumed that intrusive body continues underwater and can outcrop at the northern shore of the Waddington Bay and at Barros Rocks direction to the southwest. Petrographical researches showed that gabbroids underwent metamorphic alteration in conditions of epidote-amphibolite facies. They bear, nevertheless, relict structural-textural features and mineral associations of mafic igneous rocks. Authors drew a conclusion that geological position and petrographical peculiarities of TRGI correspond to hypabyssal level of crystallization. Primary igneous origin is proved for the microrhythmic layering of the gabbroids. ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Graham Land Rasmussen Island West Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula West Antarctica Rasmussen ENVELOPE(-64.084,-64.084,-65.248,-65.248) Graham Land ENVELOPE(-63.500,-63.500,-66.000,-66.000) Barros ENVELOPE(-62.167,-62.167,-64.717,-64.717) Waddington ENVELOPE(-64.083,-64.083,-65.266,-65.266) Tuxen ENVELOPE(-64.133,-64.133,-65.267,-65.267) Cape Tuxen ENVELOPE(-64.133,-64.133,-65.267,-65.267) Waddington Bay ENVELOPE(-64.083,-64.083,-65.267,-65.267) Barros Rocks ENVELOPE(-64.233,-64.233,-65.283,-65.283) Rasmussen Island ENVELOPE(-64.100,-64.100,-65.250,-65.250) Ukrainian Antarctic Journal 16 21 28 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Ukrainian |
topic |
geology of antarctica andean intrusive suite layered intrusions gabbroids Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
geology of antarctica andean intrusive suite layered intrusions gabbroids Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 O. V. Mytrokhyn V. G. Bakhmutov A. G. Aleksieienko L. I. Gavryliv T. V. Mytrokhina GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) |
topic_facet |
geology of antarctica andean intrusive suite layered intrusions gabbroids Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
description |
The latest geological research carried out during seasonal work in 2017 revealed that metamorphosed layered gabbroids, which partially outcrop along the Antarctic Peninsula Coast on Cape Tuxen and Rasmussen Island, compose sheet-like intrusive body of total dimensions more than 3 km2. Significant part of the Tuxen-Rasmussen Gabbroid Intrusion (TRGI) is submerged under Waddington Bay. Main objectives of the study were the identification of geological position of the TRGI and the clarification of its geological age. In addition to the field methods of the geological research the samples collected during this and the previous years were studied using optical and electron microscopy techniques in order to identify petrographic and mineralogical features of the gabbroids. Results of the studies confirmed previous observation that TRGI was embedded in Upper Jurassic Volcanic Group (UJVG) of Antarctic Peninsula and it was responsible for contact metamorphism of the UJVG and suffered contamination by volcanic material. Gabbroids and volcanic rocks were later intruded by granites of Late Cretaceous age, which belong to the Andean Intrusive Suite (AIS) of Graham Land. Authors define geological age of TRGI as Early Cretaceous. Previous U-Pb isotope datings of the gabbroids are believed to be “rejuvenated”. It was discovered that TRGI strikes in northeastern direction and dips steep in northwestern direction. It is assumed that intrusive body continues underwater and can outcrop at the northern shore of the Waddington Bay and at Barros Rocks direction to the southwest. Petrographical researches showed that gabbroids underwent metamorphic alteration in conditions of epidote-amphibolite facies. They bear, nevertheless, relict structural-textural features and mineral associations of mafic igneous rocks. Authors drew a conclusion that geological position and petrographical peculiarities of TRGI correspond to hypabyssal level of crystallization. Primary igneous origin is proved for the microrhythmic layering of the gabbroids. ... |
format |
Article in Journal/Newspaper |
author |
O. V. Mytrokhyn V. G. Bakhmutov A. G. Aleksieienko L. I. Gavryliv T. V. Mytrokhina |
author_facet |
O. V. Mytrokhyn V. G. Bakhmutov A. G. Aleksieienko L. I. Gavryliv T. V. Mytrokhina |
author_sort |
O. V. Mytrokhyn |
title |
GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) |
title_short |
GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) |
title_full |
GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) |
title_fullStr |
GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) |
title_full_unstemmed |
GEOLOGICAL POSITION AND AGE OF TUXEN-RASMUSSEN LAYERED GABBROID INTRUSION (WEST ANTARCTICA) |
title_sort |
geological position and age of tuxen-rasmussen layered gabbroid intrusion (west antarctica) |
publisher |
State Institution National Antarctic Scientific Center |
publishDate |
2018 |
url |
https://doi.org/10.33275/1727-7485.16.2017.55 https://doaj.org/article/25611406089842a4aada304f13739f6f |
long_lat |
ENVELOPE(-64.084,-64.084,-65.248,-65.248) ENVELOPE(-63.500,-63.500,-66.000,-66.000) ENVELOPE(-62.167,-62.167,-64.717,-64.717) ENVELOPE(-64.083,-64.083,-65.266,-65.266) ENVELOPE(-64.133,-64.133,-65.267,-65.267) ENVELOPE(-64.133,-64.133,-65.267,-65.267) ENVELOPE(-64.083,-64.083,-65.267,-65.267) ENVELOPE(-64.233,-64.233,-65.283,-65.283) ENVELOPE(-64.100,-64.100,-65.250,-65.250) |
geographic |
Antarctic The Antarctic Antarctic Peninsula West Antarctica Rasmussen Graham Land Barros Waddington Tuxen Cape Tuxen Waddington Bay Barros Rocks Rasmussen Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula West Antarctica Rasmussen Graham Land Barros Waddington Tuxen Cape Tuxen Waddington Bay Barros Rocks Rasmussen Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Graham Land Rasmussen Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Graham Land Rasmussen Island West Antarctica |
op_source |
Український антарктичний журнал, Iss 16, Pp 21-28 (2018) |
op_relation |
http://uaj.uac.gov.ua/index.php/uaj/article/view/55 https://doaj.org/toc/1727-7485 https://doaj.org/toc/2415-3087 1727-7485 2415-3087 doi:10.33275/1727-7485.16.2017.55 https://doaj.org/article/25611406089842a4aada304f13739f6f |
op_doi |
https://doi.org/10.33275/1727-7485.16.2017.55 |
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Ukrainian Antarctic Journal |
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21 |
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28 |
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1766256691475644416 |