Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina
Sand mineralogical analysis from 22 beaches were performed within the southernmost area of Argentina (Isla Grande de Tierra del Fuego), the Antarctic Peninsula and the Scotia Arc (South Orkney, South Shetland and James Ross islands included). Composition triangles of light and heavy minerals were co...
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Language: | Portuguese |
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Instituto de Geociências /Universidade Federal do Rio Grande do Sul
2000
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ftunivfrgsojs:oai:seer.ufrgs.br:article/20181 2023-07-16T03:53:22+02:00 Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina Características Tectónicas de Áreas de Aporte para Arenas de Playas de Tierra del Fuego y Península Antártica, Argentina GELOS, EDGARDO MARTÍN SPAGNUOLO, JORGE OSVALDO ISLA, FEDERICO IGNACIO 2000-06-30 application/pdf https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/20181 por por Instituto de Geociências /Universidade Federal do Rio Grande do Sul https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/20181/pdf https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/20181 Pesquisas em Geociências; v. 27 n. 1 (2000): Pesquisas em Geociências; 69-76 1807-9806 1518-2398 beach sands mineralogy continental margins volcanic arcs Antartic Peninsula Tierra del Fuego Island Geociências info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2000 ftunivfrgsojs 2023-06-25T21:31:55Z Sand mineralogical analysis from 22 beaches were performed within the southernmost area of Argentina (Isla Grande de Tierra del Fuego), the Antarctic Peninsula and the Scotia Arc (South Orkney, South Shetland and James Ross islands included). Composition triangles of light and heavy minerals were considered in order to relate them to depocenters, sediment sources and tectonic setting. 71% of the sediments would have been transported from magmatic arcs, 24% from elevated crystalline basements and only 5% from recycled orogene. In regard to the heavy mineral distribution, 70% were assigned to a suite from an active continental margin and the remaining 30% would correspond to areas outside the continental margins (volcanic arcs). In a general way, sediment sources were related to active margins or volcanic island arcs. As an anomalous fact, it is stressed that the coasts of Tierra del Fuego and the western sector of the Antarctic Peninsula and adjacent islands, contain sediments from a Pacific margin but lying on a passive Atlantic margin. Finally, it should be adviced about the convenience to know the source areas when ice is the transport agent, as it avoids a selective ability and it does not modify the original mineralogical composition. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula antartic* Antártica Tierra del Fuego Periódicos Científicos da UFRGS (Universidade Federal do Rio Grande do Sul) Antarctic Antarctic Peninsula Argentina isla Grande ENVELOPE(140.025,140.025,-66.664,-66.664) Pacific The Antarctic Pesquisas em Geociências 27 1 69 |
institution |
Open Polar |
collection |
Periódicos Científicos da UFRGS (Universidade Federal do Rio Grande do Sul) |
op_collection_id |
ftunivfrgsojs |
language |
Portuguese |
topic |
beach sands mineralogy continental margins volcanic arcs Antartic Peninsula Tierra del Fuego Island Geociências |
spellingShingle |
beach sands mineralogy continental margins volcanic arcs Antartic Peninsula Tierra del Fuego Island Geociências GELOS, EDGARDO MARTÍN SPAGNUOLO, JORGE OSVALDO ISLA, FEDERICO IGNACIO Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina |
topic_facet |
beach sands mineralogy continental margins volcanic arcs Antartic Peninsula Tierra del Fuego Island Geociências |
description |
Sand mineralogical analysis from 22 beaches were performed within the southernmost area of Argentina (Isla Grande de Tierra del Fuego), the Antarctic Peninsula and the Scotia Arc (South Orkney, South Shetland and James Ross islands included). Composition triangles of light and heavy minerals were considered in order to relate them to depocenters, sediment sources and tectonic setting. 71% of the sediments would have been transported from magmatic arcs, 24% from elevated crystalline basements and only 5% from recycled orogene. In regard to the heavy mineral distribution, 70% were assigned to a suite from an active continental margin and the remaining 30% would correspond to areas outside the continental margins (volcanic arcs). In a general way, sediment sources were related to active margins or volcanic island arcs. As an anomalous fact, it is stressed that the coasts of Tierra del Fuego and the western sector of the Antarctic Peninsula and adjacent islands, contain sediments from a Pacific margin but lying on a passive Atlantic margin. Finally, it should be adviced about the convenience to know the source areas when ice is the transport agent, as it avoids a selective ability and it does not modify the original mineralogical composition. |
format |
Article in Journal/Newspaper |
author |
GELOS, EDGARDO MARTÍN SPAGNUOLO, JORGE OSVALDO ISLA, FEDERICO IGNACIO |
author_facet |
GELOS, EDGARDO MARTÍN SPAGNUOLO, JORGE OSVALDO ISLA, FEDERICO IGNACIO |
author_sort |
GELOS, EDGARDO MARTÍN |
title |
Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina |
title_short |
Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina |
title_full |
Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina |
title_fullStr |
Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina |
title_full_unstemmed |
Tectonic Characteristics of Source Areas from Beach Sands of Tierra del Fuego and the Antartic Peninsule, Argentina |
title_sort |
tectonic characteristics of source areas from beach sands of tierra del fuego and the antartic peninsule, argentina |
publisher |
Instituto de Geociências /Universidade Federal do Rio Grande do Sul |
publishDate |
2000 |
url |
https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/20181 |
long_lat |
ENVELOPE(140.025,140.025,-66.664,-66.664) |
geographic |
Antarctic Antarctic Peninsula Argentina isla Grande Pacific The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Argentina isla Grande Pacific The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula antartic* Antártica Tierra del Fuego |
genre_facet |
Antarc* Antarctic Antarctic Peninsula antartic* Antártica Tierra del Fuego |
op_source |
Pesquisas em Geociências; v. 27 n. 1 (2000): Pesquisas em Geociências; 69-76 1807-9806 1518-2398 |
op_relation |
https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/20181/pdf https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/20181 |
container_title |
Pesquisas em Geociências |
container_volume |
27 |
container_issue |
1 |
container_start_page |
69 |
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1771549988293181440 |