Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted
The Middle Cambrian (~ 540 Ma) Gahcho Kué Kimberlite Field is situated about 275 km ENE of Yellowknife, NWT, Canada. The kimberlites were emplaced into 2.6 Ga Archean granitic rocks of the Yellowknife Supergroup. Four larger kimberlite bodies (5034, Tesla, Tuzo, and Hearne) as well as a number of sm...
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Online Access: | https://oceanrep.geomar.de/id/eprint/29362/ https://oceanrep.geomar.de/id/eprint/29362/1/Seghedi%20et.al.pdf https://doi.org/10.1016/j.lithos.2009.04.027 |
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ftoceanrep:oai:oceanrep.geomar.de:29362 2023-05-15T18:45:42+02:00 Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted Seghedi, Ioan Maicher, Doris Kurzslaukis, Stephan 2009 text https://oceanrep.geomar.de/id/eprint/29362/ https://oceanrep.geomar.de/id/eprint/29362/1/Seghedi%20et.al.pdf https://doi.org/10.1016/j.lithos.2009.04.027 en eng Elsevier https://oceanrep.geomar.de/id/eprint/29362/1/Seghedi%20et.al.pdf Seghedi, I., Maicher, D. and Kurzslaukis, S. (2009) Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted. Lithos, 112 (Suppl. 1). pp. 553-565. DOI 10.1016/j.lithos.2009.04.027 <https://doi.org/10.1016/j.lithos.2009.04.027>. doi:10.1016/j.lithos.2009.04.027 Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1016/j.lithos.2009.04.027 2023-04-07T15:20:15Z The Middle Cambrian (~ 540 Ma) Gahcho Kué Kimberlite Field is situated about 275 km ENE of Yellowknife, NWT, Canada. The kimberlites were emplaced into 2.6 Ga Archean granitic rocks of the Yellowknife Supergroup. Four larger kimberlite bodies (5034, Tesla, Tuzo, and Hearne) as well as a number of smaller pipes and associated sheets occur in the field. In plan view, the Tuzo pipe has a circular outline at the surface, and it widens towards deeper levels. The pipe infill consists of several types of coherent and fragmental kimberlite facies. Coherent or apparent coherent (possibly welded) kimberlite facies dominate at depth, but also occur at shallow levels, as dikes intruded late in the eruptive sequence or individual coherent kimberlite clasts. The central and shallower portions of the pipe consist of several fragmental kimberlite varieties that are texturally classified as Tuffisitic Kimberlites. The definition, geometry and extent of the geological units are complex and zones controlled by vertical elements are most significant. The fluidal outlines of some of the coherent kimberlite clasts suggest that at least some are the product of disruption of magma that was in a semi-plastic state or even of welded material. Ragged clasts at low levels are inferred to form part of a complex peperite-like system that intrudes the base of the root zone. A variable, often high abundance of local wall-rock xenoliths between and within the kimberlite phases is observed, varying in size from sub-millimeter to several tens of meters. Wall-rock fragments are common at all locations within the pipe but are especially frequent in a domain with a belt-like geometry between 120 and 200 m depth in the pipe. Steeply outward-dipping bedded deposits made up of wall-rock fragments occur in deep levels of the pipe and are especially common under the downward-widening roof segments. The gradational contact relationships of these deposits with the surrounding kimberlite-bearing rocks as well as their location suggest that they formed ... Article in Journal/Newspaper Yellowknife OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Canada Yellowknife Lithos 112 553 565 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The Middle Cambrian (~ 540 Ma) Gahcho Kué Kimberlite Field is situated about 275 km ENE of Yellowknife, NWT, Canada. The kimberlites were emplaced into 2.6 Ga Archean granitic rocks of the Yellowknife Supergroup. Four larger kimberlite bodies (5034, Tesla, Tuzo, and Hearne) as well as a number of smaller pipes and associated sheets occur in the field. In plan view, the Tuzo pipe has a circular outline at the surface, and it widens towards deeper levels. The pipe infill consists of several types of coherent and fragmental kimberlite facies. Coherent or apparent coherent (possibly welded) kimberlite facies dominate at depth, but also occur at shallow levels, as dikes intruded late in the eruptive sequence or individual coherent kimberlite clasts. The central and shallower portions of the pipe consist of several fragmental kimberlite varieties that are texturally classified as Tuffisitic Kimberlites. The definition, geometry and extent of the geological units are complex and zones controlled by vertical elements are most significant. The fluidal outlines of some of the coherent kimberlite clasts suggest that at least some are the product of disruption of magma that was in a semi-plastic state or even of welded material. Ragged clasts at low levels are inferred to form part of a complex peperite-like system that intrudes the base of the root zone. A variable, often high abundance of local wall-rock xenoliths between and within the kimberlite phases is observed, varying in size from sub-millimeter to several tens of meters. Wall-rock fragments are common at all locations within the pipe but are especially frequent in a domain with a belt-like geometry between 120 and 200 m depth in the pipe. Steeply outward-dipping bedded deposits made up of wall-rock fragments occur in deep levels of the pipe and are especially common under the downward-widening roof segments. The gradational contact relationships of these deposits with the surrounding kimberlite-bearing rocks as well as their location suggest that they formed ... |
format |
Article in Journal/Newspaper |
author |
Seghedi, Ioan Maicher, Doris Kurzslaukis, Stephan |
spellingShingle |
Seghedi, Ioan Maicher, Doris Kurzslaukis, Stephan Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted |
author_facet |
Seghedi, Ioan Maicher, Doris Kurzslaukis, Stephan |
author_sort |
Seghedi, Ioan |
title |
Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted |
title_short |
Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted |
title_full |
Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted |
title_fullStr |
Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted |
title_full_unstemmed |
Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted |
title_sort |
volcanology of tuzo pipe (gahcho kué cluster) - root-diatreme processes re-interpreted |
publisher |
Elsevier |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/29362/ https://oceanrep.geomar.de/id/eprint/29362/1/Seghedi%20et.al.pdf https://doi.org/10.1016/j.lithos.2009.04.027 |
geographic |
Canada Yellowknife |
geographic_facet |
Canada Yellowknife |
genre |
Yellowknife |
genre_facet |
Yellowknife |
op_relation |
https://oceanrep.geomar.de/id/eprint/29362/1/Seghedi%20et.al.pdf Seghedi, I., Maicher, D. and Kurzslaukis, S. (2009) Volcanology of Tuzo pipe (Gahcho Kué cluster) - root-diatreme processes re-interpreted. Lithos, 112 (Suppl. 1). pp. 553-565. DOI 10.1016/j.lithos.2009.04.027 <https://doi.org/10.1016/j.lithos.2009.04.027>. doi:10.1016/j.lithos.2009.04.027 |
op_doi |
https://doi.org/10.1016/j.lithos.2009.04.027 |
container_title |
Lithos |
container_volume |
112 |
container_start_page |
553 |
op_container_end_page |
565 |
_version_ |
1766236828788064256 |