High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada)
Abstract: Eleven microinclusion-bearing fibrous diamonds from the Fox kimberlite, Ekati mine, Northwest Territories, with either coated or cubic-like morphologies were analyzed for their major and trace element and Sr isotopic compositions. High-density fluid (HDF) microinclusions of saline composit...
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dataone:http://get.iedadata.org/metadata/iso/100540 2024-06-03T18:47:06+00:00 High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) Weiss, Yaakov Nowell, Geoff Ottley, Chris Pearson, Graham McNeill, John ENVELOPE(-110.6194,-110.2733,64.7136,64.4961) 2015-06-18T00:00:00Z http://get.iedadata.org/metadata/iso/100540 unknown IEDA: EarthChem Library Regional (Continents, Oceans) Craton Chemistry:Fluid Chemistry:Rock Geochemistry Solid Earth Carbonatitic Diamonds High-density fluid Saline Silicic subduction Canada Northwest Territories Slave Craton Slave Craton, Northwest Territories, Canada EarthChem Library (ECL) Dataset 2015 dataone:urn:node:IEDA_EARTHCHEM 2024-06-03T18:11:58Z Abstract: Eleven microinclusion-bearing fibrous diamonds from the Fox kimberlite, Ekati mine, Northwest Territories, with either coated or cubic-like morphologies were analyzed for their major and trace element and Sr isotopic compositions. High-density fluid (HDF) microinclusions of saline compositions were found in 9 of the diamonds and silicic compositions in 2 diamonds. Some of the saline diamonds encapsulate also micro-mineral inclusions of their peridotite host rock (olivine, orthopyroxene, Cr-diopside and chromite); the silicic diamonds contain microinclusions of omphacitic clinopyroxene and are related to eclogite host. Both saline and silicic HDFs are enriched in incompatible elements; they have fractionated REE patterns with elevated Ba, U, Th and LREE but depleted Nb, Ta and alkalis (K, Rb, and Cs). The fractionated nature of these patterns are more pronounced in the saline HDFs, which are also characterized with positive Eu- and Sr-anomalies versus no Eu anomaly and negative Sr anomalies in the silicic fluids. 87Sr/86Sri in the saline HDFs are 0.7039-0.7090 compared to 0.7064 and 0.7111 in the two diamonds with silicic fluids. Also provided, the trace element composition of one diamonds from the Diavik mine, Canada. Dataset Northwest Territories IEDA: EarthChem Library (via DataONE) Canada Northwest Territories ENVELOPE(-110.6194,-110.2733,64.7136,64.4961) |
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IEDA: EarthChem Library (via DataONE) |
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dataone:urn:node:IEDA_EARTHCHEM |
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unknown |
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Regional (Continents, Oceans) Craton Chemistry:Fluid Chemistry:Rock Geochemistry Solid Earth Carbonatitic Diamonds High-density fluid Saline Silicic subduction Canada Northwest Territories Slave Craton Slave Craton, Northwest Territories, Canada EarthChem Library (ECL) |
spellingShingle |
Regional (Continents, Oceans) Craton Chemistry:Fluid Chemistry:Rock Geochemistry Solid Earth Carbonatitic Diamonds High-density fluid Saline Silicic subduction Canada Northwest Territories Slave Craton Slave Craton, Northwest Territories, Canada EarthChem Library (ECL) Weiss, Yaakov Nowell, Geoff Ottley, Chris Pearson, Graham McNeill, John High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) |
topic_facet |
Regional (Continents, Oceans) Craton Chemistry:Fluid Chemistry:Rock Geochemistry Solid Earth Carbonatitic Diamonds High-density fluid Saline Silicic subduction Canada Northwest Territories Slave Craton Slave Craton, Northwest Territories, Canada EarthChem Library (ECL) |
description |
Abstract: Eleven microinclusion-bearing fibrous diamonds from the Fox kimberlite, Ekati mine, Northwest Territories, with either coated or cubic-like morphologies were analyzed for their major and trace element and Sr isotopic compositions. High-density fluid (HDF) microinclusions of saline compositions were found in 9 of the diamonds and silicic compositions in 2 diamonds. Some of the saline diamonds encapsulate also micro-mineral inclusions of their peridotite host rock (olivine, orthopyroxene, Cr-diopside and chromite); the silicic diamonds contain microinclusions of omphacitic clinopyroxene and are related to eclogite host. Both saline and silicic HDFs are enriched in incompatible elements; they have fractionated REE patterns with elevated Ba, U, Th and LREE but depleted Nb, Ta and alkalis (K, Rb, and Cs). The fractionated nature of these patterns are more pronounced in the saline HDFs, which are also characterized with positive Eu- and Sr-anomalies versus no Eu anomaly and negative Sr anomalies in the silicic fluids. 87Sr/86Sri in the saline HDFs are 0.7039-0.7090 compared to 0.7064 and 0.7111 in the two diamonds with silicic fluids. Also provided, the trace element composition of one diamonds from the Diavik mine, Canada. |
format |
Dataset |
author |
Weiss, Yaakov Nowell, Geoff Ottley, Chris Pearson, Graham McNeill, John |
author_facet |
Weiss, Yaakov Nowell, Geoff Ottley, Chris Pearson, Graham McNeill, John |
author_sort |
Weiss, Yaakov |
title |
High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) |
title_short |
High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) |
title_full |
High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) |
title_fullStr |
High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) |
title_full_unstemmed |
High-density fluid microinclusions in diamonds from the Ekati mine and the Diavik Mine (Canada) |
title_sort |
high-density fluid microinclusions in diamonds from the ekati mine and the diavik mine (canada) |
publisher |
IEDA: EarthChem Library |
publishDate |
2015 |
url |
http://get.iedadata.org/metadata/iso/100540 |
op_coverage |
ENVELOPE(-110.6194,-110.2733,64.7136,64.4961) |
long_lat |
ENVELOPE(-110.6194,-110.2733,64.7136,64.4961) |
geographic |
Canada Northwest Territories |
geographic_facet |
Canada Northwest Territories |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
_version_ |
1800875870279172096 |