An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic
The volcanic and intrusive rocks at Hardy Point and its vicinity were formed mainly du1ring a Mesozoic magmatism. Andesiticbasalt flows and andesites constitute the volcanic rocks. The intrusive ones were expressed as an epizonal body, with dioritic to granitic composition, and are cogenetic to the...
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2000
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ftjcalvados:oai:ojs.c3sl.ufpr.br:article/10560 2023-05-15T13:52:38+02:00 An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic Almeida, Delia Del Pilar M. de Machado, Adriane Hansen, Marcos A. F. Fensterseifer, Henrique Lima, Larissa de Gomes, Cristiane H. 2000-03-31 application/pdf http://revistas.ufpr.br/rbg/article/view/10560 https://doi.org/10.5380/rbg.v30i1.10560 por por Zeppelini Editorial http://revistas.ufpr.br/rbg/article/view/10560/7709 Revista Brasileira de Geociências; v. 30, n. 1 (2000) 2177-4382 0375-7536 10.5380/rbg.v30i1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2000 ftjcalvados https://doi.org/10.5380/rbg.v30i1.10560 2017-12-04T10:07:30Z The volcanic and intrusive rocks at Hardy Point and its vicinity were formed mainly du1ring a Mesozoic magmatism. Andesiticbasalt flows and andesites constitute the volcanic rocks. The intrusive ones were expressed as an epizonal body, with dioritic to granitic composition, and are cogenetic to the volcanic ones. The geochemical patterns indicate that volcanism preceded plutonism. In rare earth elements diagram the intrusive rocks present a further developed pattern, in which all rocks show calc-alkaline affinity, an enrichment in light rare earth elements relative to the heavy ones, probably due to partial melting of the mantle. In thespidergram (LILE, HFSE) the same pattern is observed for all rock groups, with strong negative anomalies of Ti, P and Nb, typical of island arcs, besides a positive anomaly of Ce, which could berelated to the assimilation of Ce-enriched marine sediments. Article in Journal/Newspaper Antarc* Antarctic Biblioteca Digital de Periódicos da UFPR (Universidade Federal do Paraná) Antarctic Hardy Point ENVELOPE(-27.067,-27.067,-59.417,-59.417) |
institution |
Open Polar |
collection |
Biblioteca Digital de Periódicos da UFPR (Universidade Federal do Paraná) |
op_collection_id |
ftjcalvados |
language |
Portuguese |
description |
The volcanic and intrusive rocks at Hardy Point and its vicinity were formed mainly du1ring a Mesozoic magmatism. Andesiticbasalt flows and andesites constitute the volcanic rocks. The intrusive ones were expressed as an epizonal body, with dioritic to granitic composition, and are cogenetic to the volcanic ones. The geochemical patterns indicate that volcanism preceded plutonism. In rare earth elements diagram the intrusive rocks present a further developed pattern, in which all rocks show calc-alkaline affinity, an enrichment in light rare earth elements relative to the heavy ones, probably due to partial melting of the mantle. In thespidergram (LILE, HFSE) the same pattern is observed for all rock groups, with strong negative anomalies of Ti, P and Nb, typical of island arcs, besides a positive anomaly of Ce, which could berelated to the assimilation of Ce-enriched marine sediments. |
format |
Article in Journal/Newspaper |
author |
Almeida, Delia Del Pilar M. de Machado, Adriane Hansen, Marcos A. F. Fensterseifer, Henrique Lima, Larissa de Gomes, Cristiane H. |
spellingShingle |
Almeida, Delia Del Pilar M. de Machado, Adriane Hansen, Marcos A. F. Fensterseifer, Henrique Lima, Larissa de Gomes, Cristiane H. An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic |
author_facet |
Almeida, Delia Del Pilar M. de Machado, Adriane Hansen, Marcos A. F. Fensterseifer, Henrique Lima, Larissa de Gomes, Cristiane H. |
author_sort |
Almeida, Delia Del Pilar M. de |
title |
An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic |
title_short |
An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic |
title_full |
An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic |
title_fullStr |
An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic |
title_full_unstemmed |
An extrusive-plutonic event at hardy point and its vicinitygreenwich Island – Antarctic |
title_sort |
extrusive-plutonic event at hardy point and its vicinitygreenwich island – antarctic |
publisher |
Zeppelini Editorial |
publishDate |
2000 |
url |
http://revistas.ufpr.br/rbg/article/view/10560 https://doi.org/10.5380/rbg.v30i1.10560 |
long_lat |
ENVELOPE(-27.067,-27.067,-59.417,-59.417) |
geographic |
Antarctic Hardy Point |
geographic_facet |
Antarctic Hardy Point |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Revista Brasileira de Geociências; v. 30, n. 1 (2000) 2177-4382 0375-7536 10.5380/rbg.v30i1 |
op_relation |
http://revistas.ufpr.br/rbg/article/view/10560/7709 |
op_doi |
https://doi.org/10.5380/rbg.v30i1.10560 |
_version_ |
1766257065784770560 |