The Wathaman batholith: largest known Precambrian pluton
The Early Proterozoic Wathaman batholith, in northern Saskatchewan and Manitoba, is a 900 km long, megacrystic granite–granodiorite intrusion that straddles the junction between ensialic miogeoclinal and probably ensimatic eugeoclinal–island-arc terranes of the "Trans-Hudson Orogen," of th...
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Canadian Science Publishing
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crcansciencepubl:10.1139/e84-113 2024-09-15T18:02:05+00:00 The Wathaman batholith: largest known Precambrian pluton Fumerton, S. L. Stauffer, M. R. Lewry, J. F. 1984 http://dx.doi.org/10.1139/e84-113 http://www.nrcresearchpress.com/doi/pdf/10.1139/e84-113 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 21, issue 10, page 1082-1097 ISSN 0008-4077 1480-3313 journal-article 1984 crcansciencepubl https://doi.org/10.1139/e84-113 2024-07-25T04:10:03Z The Early Proterozoic Wathaman batholith, in northern Saskatchewan and Manitoba, is a 900 km long, megacrystic granite–granodiorite intrusion that straddles the junction between ensialic miogeoclinal and probably ensimatic eugeoclinal–island-arc terranes of the "Trans-Hudson Orogen," of the western Churchill Province. Although the largest Precambrian batholith known, it is, apart from marginal complexities, remarkably homogeneous throughout and, unlike comparably sized and situated Phanerozoic batholiths, shows no evidence of multiple intrusion, nor does it have comagmatic early mafic phases. However, it may be considered as just one phase of a larger batholithic belt that also includes numerous smaller plutons. Taken as a whole the composite batholithic belt is similar in many aspects to Mesozoic Pacific rim batholithic belts, and like them probably was emplaced during plate collision.The batholith is affected by pervasive internal deformation, is bounded on the northwest by major blastomylonite zones, and is transected internally by splaying shear zones. It is a mid- to late-synkinematic Hudsonian intrusion, emplaced within a markedly compressional, crustal regime. On the basis of petrological, geochemical, and isotopic criteria the batholith is an "I-type" intrusion, but the origin of the magma and the emplacement mechanisms are still unresolved problems. Article in Journal/Newspaper Churchill Canadian Science Publishing Canadian Journal of Earth Sciences 21 10 1082 1097 |
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Canadian Science Publishing |
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English |
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The Early Proterozoic Wathaman batholith, in northern Saskatchewan and Manitoba, is a 900 km long, megacrystic granite–granodiorite intrusion that straddles the junction between ensialic miogeoclinal and probably ensimatic eugeoclinal–island-arc terranes of the "Trans-Hudson Orogen," of the western Churchill Province. Although the largest Precambrian batholith known, it is, apart from marginal complexities, remarkably homogeneous throughout and, unlike comparably sized and situated Phanerozoic batholiths, shows no evidence of multiple intrusion, nor does it have comagmatic early mafic phases. However, it may be considered as just one phase of a larger batholithic belt that also includes numerous smaller plutons. Taken as a whole the composite batholithic belt is similar in many aspects to Mesozoic Pacific rim batholithic belts, and like them probably was emplaced during plate collision.The batholith is affected by pervasive internal deformation, is bounded on the northwest by major blastomylonite zones, and is transected internally by splaying shear zones. It is a mid- to late-synkinematic Hudsonian intrusion, emplaced within a markedly compressional, crustal regime. On the basis of petrological, geochemical, and isotopic criteria the batholith is an "I-type" intrusion, but the origin of the magma and the emplacement mechanisms are still unresolved problems. |
format |
Article in Journal/Newspaper |
author |
Fumerton, S. L. Stauffer, M. R. Lewry, J. F. |
spellingShingle |
Fumerton, S. L. Stauffer, M. R. Lewry, J. F. The Wathaman batholith: largest known Precambrian pluton |
author_facet |
Fumerton, S. L. Stauffer, M. R. Lewry, J. F. |
author_sort |
Fumerton, S. L. |
title |
The Wathaman batholith: largest known Precambrian pluton |
title_short |
The Wathaman batholith: largest known Precambrian pluton |
title_full |
The Wathaman batholith: largest known Precambrian pluton |
title_fullStr |
The Wathaman batholith: largest known Precambrian pluton |
title_full_unstemmed |
The Wathaman batholith: largest known Precambrian pluton |
title_sort |
wathaman batholith: largest known precambrian pluton |
publisher |
Canadian Science Publishing |
publishDate |
1984 |
url |
http://dx.doi.org/10.1139/e84-113 http://www.nrcresearchpress.com/doi/pdf/10.1139/e84-113 |
genre |
Churchill |
genre_facet |
Churchill |
op_source |
Canadian Journal of Earth Sciences volume 21, issue 10, page 1082-1097 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e84-113 |
container_title |
Canadian Journal of Earth Sciences |
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21 |
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10 |
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1082 |
op_container_end_page |
1097 |
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1810439217581391872 |