Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada
The paper presents data on petrology, bulk rock and mineral compositions, and textural classification of the Middle Jurassic Jericho kimberlite (Slave craton, Canada). The kimberlite was emplaced as three steep-sided pipes in granite that was overlain by limestones and minor soft sediments. The pipe...
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crcansciencepubl:10.1139/e08-011 2024-09-15T18:26:56+00:00 Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada Kopylova, Maya G. Hayman, Patrick Linnen, Bob 2008 http://dx.doi.org/10.1139/e08-011 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E08-011 http://www.nrcresearchpress.com/doi/pdf/10.1139/E08-011 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 45, issue 6, page 701-723 ISSN 0008-4077 1480-3313 journal-article 2008 crcansciencepubl https://doi.org/10.1139/e08-011 2024-07-25T04:10:08Z The paper presents data on petrology, bulk rock and mineral compositions, and textural classification of the Middle Jurassic Jericho kimberlite (Slave craton, Canada). The kimberlite was emplaced as three steep-sided pipes in granite that was overlain by limestones and minor soft sediments. The pipes are infilled with hypabyssal and pyroclastic kimberlites and connected to a satellite pipe by a dyke. The Jericho kimberlite is classified as a Group Ia, lacking groundmass tetraferriphlogopite and containing monticellite pseudomorphs. The kimberlite formed during several consecutive emplacement events of compositionally different batches of kimberlite magma. Core-logging and thin-section observations identified at least two phases of hypabyssal kimberlites and three phases of pyroclastic kimberlites. Hypabyssal kimberlites intruded as a main dyke (HK1) and as late small-volume aphanitic and vesicular dykes. Massive pyroclastic kimberlite (MPK1) predominantly filled the northern and southern lobes of the pipe and formed from magma different from the HK1 magma. The MPK1 magma crystallized Ti-, Fe-, and Cr-rich phlogopite without rims of barian phlogopite, and clinopyroxene and spinel without atoll structures. MPK1 textures, superficially reminiscent of tuffisitic kimberlite, are caused by pervasive contamination by granite xenoliths. The next explosive events filled the central lobe with two varieties of pyroclastic kimberlite: (1) massive and (2) weakly bedded, normally graded pyroclastic kimberlite. The geology of the Jericho pipe differs from the geology of South African or the Prairie kimberlites, but may resemble Lac de Gras pipes, in which deeper erosion removed upper facies of resedimented kimberlites. Article in Journal/Newspaper Nunavut Canadian Science Publishing Canadian Journal of Earth Sciences 45 6 701 723 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
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The paper presents data on petrology, bulk rock and mineral compositions, and textural classification of the Middle Jurassic Jericho kimberlite (Slave craton, Canada). The kimberlite was emplaced as three steep-sided pipes in granite that was overlain by limestones and minor soft sediments. The pipes are infilled with hypabyssal and pyroclastic kimberlites and connected to a satellite pipe by a dyke. The Jericho kimberlite is classified as a Group Ia, lacking groundmass tetraferriphlogopite and containing monticellite pseudomorphs. The kimberlite formed during several consecutive emplacement events of compositionally different batches of kimberlite magma. Core-logging and thin-section observations identified at least two phases of hypabyssal kimberlites and three phases of pyroclastic kimberlites. Hypabyssal kimberlites intruded as a main dyke (HK1) and as late small-volume aphanitic and vesicular dykes. Massive pyroclastic kimberlite (MPK1) predominantly filled the northern and southern lobes of the pipe and formed from magma different from the HK1 magma. The MPK1 magma crystallized Ti-, Fe-, and Cr-rich phlogopite without rims of barian phlogopite, and clinopyroxene and spinel without atoll structures. MPK1 textures, superficially reminiscent of tuffisitic kimberlite, are caused by pervasive contamination by granite xenoliths. The next explosive events filled the central lobe with two varieties of pyroclastic kimberlite: (1) massive and (2) weakly bedded, normally graded pyroclastic kimberlite. The geology of the Jericho pipe differs from the geology of South African or the Prairie kimberlites, but may resemble Lac de Gras pipes, in which deeper erosion removed upper facies of resedimented kimberlites. |
author2 |
Linnen, Bob |
format |
Article in Journal/Newspaper |
author |
Kopylova, Maya G. Hayman, Patrick |
spellingShingle |
Kopylova, Maya G. Hayman, Patrick Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada |
author_facet |
Kopylova, Maya G. Hayman, Patrick |
author_sort |
Kopylova, Maya G. |
title |
Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada |
title_short |
Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada |
title_full |
Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada |
title_fullStr |
Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada |
title_full_unstemmed |
Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada |
title_sort |
petrology and textural classification of the jericho kimberlite, northern slave province, nunavut, canada |
publisher |
Canadian Science Publishing |
publishDate |
2008 |
url |
http://dx.doi.org/10.1139/e08-011 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E08-011 http://www.nrcresearchpress.com/doi/pdf/10.1139/E08-011 |
genre |
Nunavut |
genre_facet |
Nunavut |
op_source |
Canadian Journal of Earth Sciences volume 45, issue 6, page 701-723 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e08-011 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
45 |
container_issue |
6 |
container_start_page |
701 |
op_container_end_page |
723 |
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1810467568335454208 |