The Ballantrae ophiolite
Summary The Ballantrae complex, variously interpreted in the light of plate tectonics, is reappraised on the basis of comparisons with ophiolites of the Newfoundland Appalachians and the southwestern Pacific. All the main components of a typical ophiolite sequence can be recognized although the sequ...
Published in: | Geological Magazine |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Cambridge University Press (CUP)
1973
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Online Access: | http://dx.doi.org/10.1017/s0016756800037900 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800037900 |
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crcambridgeupr:10.1017/s0016756800037900 2024-09-15T18:20:08+00:00 The Ballantrae ophiolite Church, W. R. Gayer, R. A. 1973 http://dx.doi.org/10.1017/s0016756800037900 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800037900 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 110, issue 6, page 497-510 ISSN 0016-7568 1469-5081 journal-article 1973 crcambridgeupr https://doi.org/10.1017/s0016756800037900 2024-07-31T04:03:43Z Summary The Ballantrae complex, variously interpreted in the light of plate tectonics, is reappraised on the basis of comparisons with ophiolites of the Newfoundland Appalachians and the southwestern Pacific. All the main components of a typical ophiolite sequence can be recognized although the sequence has been greatly disturbed by post-emplacement Caledonian deformation. The presence of a garnet granulite-amphibolite ‘aureole’ beneath the peridotite member of the complex is confirmed, thus establishing the affinity of the complex to other ophiolite-amphibolite associations of the Appalachian and Alpine systems. Rock units previously described as agglomerates are re-interpreted as olistostromes, and the important Pinbain Beach ‘shaly group’ containing fragments of ophiolitic debris, garnet-ariegite, and glaucophane schist, is considered to be a Wildflysch unit of Middle Arenig age. The olistostromes were deposited following obduction of oceanic lithosphere represented by the ultramafic and mafic rocks of the Ballantrae complex. Recognition of the complex as overthrust ophiolite removes certain constraints on the position of a Lower Paleozoic subduction zone within the Southern Uplands. Article in Journal/Newspaper Newfoundland Cambridge University Press Geological Magazine 110 6 497 510 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Summary The Ballantrae complex, variously interpreted in the light of plate tectonics, is reappraised on the basis of comparisons with ophiolites of the Newfoundland Appalachians and the southwestern Pacific. All the main components of a typical ophiolite sequence can be recognized although the sequence has been greatly disturbed by post-emplacement Caledonian deformation. The presence of a garnet granulite-amphibolite ‘aureole’ beneath the peridotite member of the complex is confirmed, thus establishing the affinity of the complex to other ophiolite-amphibolite associations of the Appalachian and Alpine systems. Rock units previously described as agglomerates are re-interpreted as olistostromes, and the important Pinbain Beach ‘shaly group’ containing fragments of ophiolitic debris, garnet-ariegite, and glaucophane schist, is considered to be a Wildflysch unit of Middle Arenig age. The olistostromes were deposited following obduction of oceanic lithosphere represented by the ultramafic and mafic rocks of the Ballantrae complex. Recognition of the complex as overthrust ophiolite removes certain constraints on the position of a Lower Paleozoic subduction zone within the Southern Uplands. |
format |
Article in Journal/Newspaper |
author |
Church, W. R. Gayer, R. A. |
spellingShingle |
Church, W. R. Gayer, R. A. The Ballantrae ophiolite |
author_facet |
Church, W. R. Gayer, R. A. |
author_sort |
Church, W. R. |
title |
The Ballantrae ophiolite |
title_short |
The Ballantrae ophiolite |
title_full |
The Ballantrae ophiolite |
title_fullStr |
The Ballantrae ophiolite |
title_full_unstemmed |
The Ballantrae ophiolite |
title_sort |
ballantrae ophiolite |
publisher |
Cambridge University Press (CUP) |
publishDate |
1973 |
url |
http://dx.doi.org/10.1017/s0016756800037900 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800037900 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Geological Magazine volume 110, issue 6, page 497-510 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756800037900 |
container_title |
Geological Magazine |
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110 |
container_issue |
6 |
container_start_page |
497 |
op_container_end_page |
510 |
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1810458504580825088 |