Mesozoic dolerites from Whichaway Nunataks
The southernmost exposures of Mesozoic dolerites in Coats Land, the Omega dolerites, occur at Whichaway Nunataks. The dolerites are geochemically indistinguishable from the Theron Mountains' dolerites. In both regions high- and low-Ti compositions occur with trace element signatures more akin t...
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Language: | English |
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Cambridge University Press (CUP)
1989
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Online Access: | http://dx.doi.org/10.1017/s0954102089000222 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102089000222 |
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crcambridgeupr:10.1017/s0954102089000222 2024-09-15T17:49:05+00:00 Mesozoic dolerites from Whichaway Nunataks Brewer, T.S. 1989 http://dx.doi.org/10.1017/s0954102089000222 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102089000222 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 1, issue 2, page 151-155 ISSN 0954-1020 1365-2079 journal-article 1989 crcambridgeupr https://doi.org/10.1017/s0954102089000222 2024-07-24T04:03:56Z The southernmost exposures of Mesozoic dolerites in Coats Land, the Omega dolerites, occur at Whichaway Nunataks. The dolerites are geochemically indistinguishable from the Theron Mountains' dolerites. In both regions high- and low-Ti compositions occur with trace element signatures more akin to island-arc magmas than within-plate tholeiites. From a preliminary Sr isotopic study the Omega dolerites can be classified as Ferrar type. The existence of Ferrar type material in these nunataks suggest that the boundary between the Ferrar and Weddell Sea sub-provinces occurs within the Theron Mountains. Article in Journal/Newspaper Antarctic Science Weddell Sea Cambridge University Press Antarctic Science 1 2 151 155 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The southernmost exposures of Mesozoic dolerites in Coats Land, the Omega dolerites, occur at Whichaway Nunataks. The dolerites are geochemically indistinguishable from the Theron Mountains' dolerites. In both regions high- and low-Ti compositions occur with trace element signatures more akin to island-arc magmas than within-plate tholeiites. From a preliminary Sr isotopic study the Omega dolerites can be classified as Ferrar type. The existence of Ferrar type material in these nunataks suggest that the boundary between the Ferrar and Weddell Sea sub-provinces occurs within the Theron Mountains. |
format |
Article in Journal/Newspaper |
author |
Brewer, T.S. |
spellingShingle |
Brewer, T.S. Mesozoic dolerites from Whichaway Nunataks |
author_facet |
Brewer, T.S. |
author_sort |
Brewer, T.S. |
title |
Mesozoic dolerites from Whichaway Nunataks |
title_short |
Mesozoic dolerites from Whichaway Nunataks |
title_full |
Mesozoic dolerites from Whichaway Nunataks |
title_fullStr |
Mesozoic dolerites from Whichaway Nunataks |
title_full_unstemmed |
Mesozoic dolerites from Whichaway Nunataks |
title_sort |
mesozoic dolerites from whichaway nunataks |
publisher |
Cambridge University Press (CUP) |
publishDate |
1989 |
url |
http://dx.doi.org/10.1017/s0954102089000222 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102089000222 |
genre |
Antarctic Science Weddell Sea |
genre_facet |
Antarctic Science Weddell Sea |
op_source |
Antarctic Science volume 1, issue 2, page 151-155 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102089000222 |
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Antarctic Science |
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1 |
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2 |
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151 |
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155 |
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1810290784753156096 |