The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica
Abstract The volcanic rock series on the Fildes Peninsula is the product of the later subduction of the Pacific plate beneath the Antarctic plate. It consists mainly of basalt, basaltic andesite and andesite with minor dacite. Its isotopic ages range from 64.6 ± 1 to 43 ± 2 Ma, belonging to Palaeoce...
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crwiley:10.1111/j.1755-6724.1992.mp5001003.x 2023-12-03T10:13:58+01:00 The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica Zhaonai, Li Xiaohan, Liu Ruxiang, Shang 1992 http://dx.doi.org/10.1111/j.1755-6724.1992.mp5001003.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1755-6724.1992.mp5001003.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1755-6724.1992.mp5001003.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Acta Geologica Sinica - English Edition volume 5, issue 1, page 39-57 ISSN 1000-9515 1755-6724 Geology journal-article 1992 crwiley https://doi.org/10.1111/j.1755-6724.1992.mp5001003.x 2023-11-09T14:22:34Z Abstract The volcanic rock series on the Fildes Peninsula is the product of the later subduction of the Pacific plate beneath the Antarctic plate. It consists mainly of basalt, basaltic andesite and andesite with minor dacite. Its isotopic ages range from 64.6 ± 1 to 43 ± 2 Ma, belonging to Palaeocene to Eocene. Volcanism in the area may be divided into two phases. The contents of major oxides, rare earth elements (REE) and trace elements in volcanic rocks formed in different phases show regular changes, which are mainly related to the rock associations of these phases. Isotope geochemical studies indicate that the primitive magma in the area originating by partial melting in the upper mantle underwent fractional crystallization and ascended to the high‐level (shallow) magma chamber. Before eruption the primitive basalt‐andesitic magma was subjected to differentiation in the high‐level magma chamber, forming zones of derivative magmas of different compositions. In various phases magma‐conducting faults experienced periodic extension and cut through various derivative magma zones in different parts of the peninsula, leading to the eruption of magmas of different compositions on the surface and the formation of volcanic rock associations of corresponding compositions. Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island Wiley Online Library (via Crossref) Antarctic The Antarctic King George Island Pacific Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) Acta Geologica Sinica - English Edition 5 1 39 57 |
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Open Polar |
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Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Geology |
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Geology Zhaonai, Li Xiaohan, Liu Ruxiang, Shang The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica |
topic_facet |
Geology |
description |
Abstract The volcanic rock series on the Fildes Peninsula is the product of the later subduction of the Pacific plate beneath the Antarctic plate. It consists mainly of basalt, basaltic andesite and andesite with minor dacite. Its isotopic ages range from 64.6 ± 1 to 43 ± 2 Ma, belonging to Palaeocene to Eocene. Volcanism in the area may be divided into two phases. The contents of major oxides, rare earth elements (REE) and trace elements in volcanic rocks formed in different phases show regular changes, which are mainly related to the rock associations of these phases. Isotope geochemical studies indicate that the primitive magma in the area originating by partial melting in the upper mantle underwent fractional crystallization and ascended to the high‐level (shallow) magma chamber. Before eruption the primitive basalt‐andesitic magma was subjected to differentiation in the high‐level magma chamber, forming zones of derivative magmas of different compositions. In various phases magma‐conducting faults experienced periodic extension and cut through various derivative magma zones in different parts of the peninsula, leading to the eruption of magmas of different compositions on the surface and the formation of volcanic rock associations of corresponding compositions. |
format |
Article in Journal/Newspaper |
author |
Zhaonai, Li Xiaohan, Liu Ruxiang, Shang |
author_facet |
Zhaonai, Li Xiaohan, Liu Ruxiang, Shang |
author_sort |
Zhaonai, Li |
title |
The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica |
title_short |
The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica |
title_full |
The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica |
title_fullStr |
The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica |
title_full_unstemmed |
The Characteristics and Mechanism of Island‐Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica |
title_sort |
characteristics and mechanism of island‐arc volcanism on the central and southern fildes peninsula, king george island, antarctica |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1111/j.1755-6724.1992.mp5001003.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1755-6724.1992.mp5001003.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1755-6724.1992.mp5001003.x |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) |
geographic |
Antarctic The Antarctic King George Island Pacific Fildes Fildes peninsula |
geographic_facet |
Antarctic The Antarctic King George Island Pacific Fildes Fildes peninsula |
genre |
Antarc* Antarctic Antarctica King George Island |
genre_facet |
Antarc* Antarctic Antarctica King George Island |
op_source |
Acta Geologica Sinica - English Edition volume 5, issue 1, page 39-57 ISSN 1000-9515 1755-6724 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1755-6724.1992.mp5001003.x |
container_title |
Acta Geologica Sinica - English Edition |
container_volume |
5 |
container_issue |
1 |
container_start_page |
39 |
op_container_end_page |
57 |
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1784260972332974080 |