Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada)
The matrix of volcaniclastic kimberlite (VK) from the Muskox pipe (Northern Slave Province, Nunavut, Canada) is interpreted to represent an overprint of an original clastic matrix. Muskox VK is subdivided into three different matrix mineral assemblages that reflect differences in the proportions of...
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ftqueensland:oai:eprints.qut.edu.au:217244 2024-02-04T10:02:07+01:00 Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) Hayman, Patrick Cas, Ray Johnson, M. 2009 https://eprints.qut.edu.au/217244/ unknown Elsevier doi:10.1016/j.lithos.2009.06.025 Hayman, Patrick, Cas, Ray, & Johnson, M. (2009) Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada). Lithos, 112(S1), pp. 473-487. https://eprints.qut.edu.au/217244/ Science & Engineering Faculty; School of Earth, Environmental & Biological Sciences Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Lithos Canada Deuteric fluids Fe-Ti oxides Kimberlite alteration Matrix overprint Meteoric fluids North America Nunavut Ovibos moschatus moschatus Serpentine X-ray diffraction X-ray fluorescence core logging crystallization electron probe analysis emplacement fluid inclusion iron oxide kimberlite layered intrusion matrix meteoric water mineral alteration permeability petrography titanium volcaniclastic deposit Contribution to Journal 2009 ftqueensland https://doi.org/10.1016/j.lithos.2009.06.025 2024-01-09T00:00:33Z The matrix of volcaniclastic kimberlite (VK) from the Muskox pipe (Northern Slave Province, Nunavut, Canada) is interpreted to represent an overprint of an original clastic matrix. Muskox VK is subdivided into three different matrix mineral assemblages that reflect differences in the proportions of original primary matrix constituents, temperature of formation and nature of the altering fluids. Using whole rock X-ray fluorescence (XRF), whole rock X-ray diffraction (XRD), microprobe analyses, back-scatter electron (BSE) imaging, petrography and core logging, we find that most matrix minerals (serpentine, phlogopite, chlorite, saponite, monticellite, Fe-Ti oxides and calcite) lack either primary igneous or primary clastic textures. The mineralogy and textures are most consistent with formation through alteration overprinting of an original clastic matrix that form by retrograde reactions as the deposit cools, or, in the case of calcite, by precipitation from Ca-bearing fluids into a secondary porosity. The first mineral assemblage consists largely of serpentine, phlogopite, calcite, Fe-Ti oxides and monticellite and occurs in VK with relatively fresh framework clasts. Alteration reactions, driven by deuteric fluids derived from the juvenile constituents, promote the crystallisation of minerals that indicate relatively high temperatures of formation (> 400 °C). Lower-temperature minerals are not present because permeability was occluded before the deposit cooled to low temperatures, thus shielding the facies from further interaction with fluids. The other two matrix mineral assemblages consist largely of serpentine, phlogopite, calcite, +/- diopside, and +/- chlorite. They form in VK that contains more country rock, which may have caused the deposit to be cooler upon emplacement. Most framework components are completely altered, suggesting that larger volumes of fluids drove the alteration reactions. These fluids were likely of meteoric provenance and became heated by the volcaniclastic debris when they ... Article in Journal/Newspaper muskox Nunavut ovibos moschatus Queensland University of Technology: QUT ePrints Nunavut Canada Rock X ENVELOPE(136.694,136.694,-66.339,-66.339) Lithos 112 473 487 |
institution |
Open Polar |
collection |
Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
topic |
Canada Deuteric fluids Fe-Ti oxides Kimberlite alteration Matrix overprint Meteoric fluids North America Nunavut Ovibos moschatus moschatus Serpentine X-ray diffraction X-ray fluorescence core logging crystallization electron probe analysis emplacement fluid inclusion iron oxide kimberlite layered intrusion matrix meteoric water mineral alteration permeability petrography titanium volcaniclastic deposit |
spellingShingle |
Canada Deuteric fluids Fe-Ti oxides Kimberlite alteration Matrix overprint Meteoric fluids North America Nunavut Ovibos moschatus moschatus Serpentine X-ray diffraction X-ray fluorescence core logging crystallization electron probe analysis emplacement fluid inclusion iron oxide kimberlite layered intrusion matrix meteoric water mineral alteration permeability petrography titanium volcaniclastic deposit Hayman, Patrick Cas, Ray Johnson, M. Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) |
topic_facet |
Canada Deuteric fluids Fe-Ti oxides Kimberlite alteration Matrix overprint Meteoric fluids North America Nunavut Ovibos moschatus moschatus Serpentine X-ray diffraction X-ray fluorescence core logging crystallization electron probe analysis emplacement fluid inclusion iron oxide kimberlite layered intrusion matrix meteoric water mineral alteration permeability petrography titanium volcaniclastic deposit |
description |
The matrix of volcaniclastic kimberlite (VK) from the Muskox pipe (Northern Slave Province, Nunavut, Canada) is interpreted to represent an overprint of an original clastic matrix. Muskox VK is subdivided into three different matrix mineral assemblages that reflect differences in the proportions of original primary matrix constituents, temperature of formation and nature of the altering fluids. Using whole rock X-ray fluorescence (XRF), whole rock X-ray diffraction (XRD), microprobe analyses, back-scatter electron (BSE) imaging, petrography and core logging, we find that most matrix minerals (serpentine, phlogopite, chlorite, saponite, monticellite, Fe-Ti oxides and calcite) lack either primary igneous or primary clastic textures. The mineralogy and textures are most consistent with formation through alteration overprinting of an original clastic matrix that form by retrograde reactions as the deposit cools, or, in the case of calcite, by precipitation from Ca-bearing fluids into a secondary porosity. The first mineral assemblage consists largely of serpentine, phlogopite, calcite, Fe-Ti oxides and monticellite and occurs in VK with relatively fresh framework clasts. Alteration reactions, driven by deuteric fluids derived from the juvenile constituents, promote the crystallisation of minerals that indicate relatively high temperatures of formation (> 400 °C). Lower-temperature minerals are not present because permeability was occluded before the deposit cooled to low temperatures, thus shielding the facies from further interaction with fluids. The other two matrix mineral assemblages consist largely of serpentine, phlogopite, calcite, +/- diopside, and +/- chlorite. They form in VK that contains more country rock, which may have caused the deposit to be cooler upon emplacement. Most framework components are completely altered, suggesting that larger volumes of fluids drove the alteration reactions. These fluids were likely of meteoric provenance and became heated by the volcaniclastic debris when they ... |
format |
Article in Journal/Newspaper |
author |
Hayman, Patrick Cas, Ray Johnson, M. |
author_facet |
Hayman, Patrick Cas, Ray Johnson, M. |
author_sort |
Hayman, Patrick |
title |
Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) |
title_short |
Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) |
title_full |
Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) |
title_fullStr |
Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) |
title_full_unstemmed |
Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada) |
title_sort |
characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the muskox pipe (nunavut, canada) |
publisher |
Elsevier |
publishDate |
2009 |
url |
https://eprints.qut.edu.au/217244/ |
long_lat |
ENVELOPE(136.694,136.694,-66.339,-66.339) |
geographic |
Nunavut Canada Rock X |
geographic_facet |
Nunavut Canada Rock X |
genre |
muskox Nunavut ovibos moschatus |
genre_facet |
muskox Nunavut ovibos moschatus |
op_source |
Lithos |
op_relation |
doi:10.1016/j.lithos.2009.06.025 Hayman, Patrick, Cas, Ray, & Johnson, M. (2009) Characteristics and alteration origins of matrix minerals in volcaniclastic kimberlite of the Muskox pipe (Nunavut, Canada). Lithos, 112(S1), pp. 473-487. https://eprints.qut.edu.au/217244/ Science & Engineering Faculty; School of Earth, Environmental & Biological Sciences |
op_rights |
Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1016/j.lithos.2009.06.025 |
container_title |
Lithos |
container_volume |
112 |
container_start_page |
473 |
op_container_end_page |
487 |
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1789968502499573760 |