Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana
The Late Paleozoic Ice Age (LPIA) was one of the most severe glacial phases of Phanerozoic, which led to the development of ice centers within Gondwana. The sedimentary record of the Beacon Supergroup preserves strata related to early Permian ice dynamics. Here we document outcrops across the northe...
Published in: | Rendiconti Online della Società Geologica Italiana |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2024
|
Subjects: | |
Online Access: | https://hdl.handle.net/11365/1261776 https://doi.org/10.3301/ROL.2024.27 https://www.rendicontisocietageologicaitaliana.it/297/article-4247/composition-of-late-paleozoic-ice-age-tillites-in-victoria-land-antarctica-implications-for-sediment-provenance-and-ice-centers-extent-in-southern-gondwana.html |
id |
ftunivsiena:oai:usiena-air.unisi.it:11365/1261776 |
---|---|
record_format |
openpolar |
spelling |
ftunivsiena:oai:usiena-air.unisi.it:11365/1261776 2024-06-23T07:47:54+00:00 Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana Zurli, Luca Perotti, Matteo Cornamusini, Gianluca Zurli, Luca Perotti, Matteo Cornamusini, Gianluca 2024 ELETTRONICO https://hdl.handle.net/11365/1261776 https://doi.org/10.3301/ROL.2024.27 https://www.rendicontisocietageologicaitaliana.it/297/article-4247/composition-of-late-paleozoic-ice-age-tillites-in-victoria-land-antarctica-implications-for-sediment-provenance-and-ice-centers-extent-in-southern-gondwana.html eng eng volume:63 firstpage:1 lastpage:8 numberofpages:8 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA https://hdl.handle.net/11365/1261776 doi:10.3301/ROL.2024.27 https://www.rendicontisocietageologicaitaliana.it/297/article-4247/composition-of-late-paleozoic-ice-age-tillites-in-victoria-land-antarctica-implications-for-sediment-provenance-and-ice-centers-extent-in-southern-gondwana.html info:eu-repo/semantics/closedAccess provenance study Antarctica Gondwana diamictite info:eu-repo/semantics/article 2024 ftunivsiena https://doi.org/10.3301/ROL.2024.27 2024-06-04T14:10:51Z The Late Paleozoic Ice Age (LPIA) was one of the most severe glacial phases of Phanerozoic, which led to the development of ice centers within Gondwana. The sedimentary record of the Beacon Supergroup preserves strata related to early Permian ice dynamics. Here we document outcrops across the northern and southern Victoria Land basins in the Transantarctic Mountains (Antarctica); differences come out from the two regions, emphasizing the articulated physiography of the basin and the typology and size of the ice centers. The most common facies are massive to crudely stratified diamictite, sometimes interlayered with mudstone strata. Tillites deposited in a subglacial to ice proximal setting within a glaciomarine to glacio-continental environment, recording climate pulsating waxing and waning ice extent. Diamictite were petrographically analyzed to characterize the mineralogical composition of coarse-grained fraction. Macroscopic and thin section analysis have been carried out on cobbles to determine their petrographic features. The latter reveal that most of them were sourced from the local crystalline basement and from the Devonian sedimentary strata. Clasts composition, together with other provenance tools and paleo-ice flow indicators, allow reconstructing the geological setting of the Permian Victoria Land Basin and the paleo-ice dynamics and ice extent during LPIA in Antarctica. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Università degli Studi di Siena: USiena air Victoria Land Transantarctic Mountains Rendiconti Online della Società Geologica Italiana 63 1 8 |
institution |
Open Polar |
collection |
Università degli Studi di Siena: USiena air |
op_collection_id |
ftunivsiena |
language |
English |
topic |
provenance study Antarctica Gondwana diamictite |
spellingShingle |
provenance study Antarctica Gondwana diamictite Zurli, Luca Perotti, Matteo Cornamusini, Gianluca Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana |
topic_facet |
provenance study Antarctica Gondwana diamictite |
description |
The Late Paleozoic Ice Age (LPIA) was one of the most severe glacial phases of Phanerozoic, which led to the development of ice centers within Gondwana. The sedimentary record of the Beacon Supergroup preserves strata related to early Permian ice dynamics. Here we document outcrops across the northern and southern Victoria Land basins in the Transantarctic Mountains (Antarctica); differences come out from the two regions, emphasizing the articulated physiography of the basin and the typology and size of the ice centers. The most common facies are massive to crudely stratified diamictite, sometimes interlayered with mudstone strata. Tillites deposited in a subglacial to ice proximal setting within a glaciomarine to glacio-continental environment, recording climate pulsating waxing and waning ice extent. Diamictite were petrographically analyzed to characterize the mineralogical composition of coarse-grained fraction. Macroscopic and thin section analysis have been carried out on cobbles to determine their petrographic features. The latter reveal that most of them were sourced from the local crystalline basement and from the Devonian sedimentary strata. Clasts composition, together with other provenance tools and paleo-ice flow indicators, allow reconstructing the geological setting of the Permian Victoria Land Basin and the paleo-ice dynamics and ice extent during LPIA in Antarctica. |
author2 |
Zurli, Luca Perotti, Matteo Cornamusini, Gianluca |
format |
Article in Journal/Newspaper |
author |
Zurli, Luca Perotti, Matteo Cornamusini, Gianluca |
author_facet |
Zurli, Luca Perotti, Matteo Cornamusini, Gianluca |
author_sort |
Zurli, Luca |
title |
Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana |
title_short |
Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana |
title_full |
Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana |
title_fullStr |
Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana |
title_full_unstemmed |
Composition of Late Paleozoic Ice Age tillites in Victoria Land (Antarctica): implications for sediment provenance and ice centers extent in southern Gondwana |
title_sort |
composition of late paleozoic ice age tillites in victoria land (antarctica): implications for sediment provenance and ice centers extent in southern gondwana |
publishDate |
2024 |
url |
https://hdl.handle.net/11365/1261776 https://doi.org/10.3301/ROL.2024.27 https://www.rendicontisocietageologicaitaliana.it/297/article-4247/composition-of-late-paleozoic-ice-age-tillites-in-victoria-land-antarctica-implications-for-sediment-provenance-and-ice-centers-extent-in-southern-gondwana.html |
geographic |
Victoria Land Transantarctic Mountains |
geographic_facet |
Victoria Land Transantarctic Mountains |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
volume:63 firstpage:1 lastpage:8 numberofpages:8 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA https://hdl.handle.net/11365/1261776 doi:10.3301/ROL.2024.27 https://www.rendicontisocietageologicaitaliana.it/297/article-4247/composition-of-late-paleozoic-ice-age-tillites-in-victoria-land-antarctica-implications-for-sediment-provenance-and-ice-centers-extent-in-southern-gondwana.html |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3301/ROL.2024.27 |
container_title |
Rendiconti Online della Società Geologica Italiana |
container_volume |
63 |
container_start_page |
1 |
op_container_end_page |
8 |
_version_ |
1802638151403962368 |