The geology and mineralogy of the Anuri kimberlite, Nunavut, Canada

Masun, K.M.; Doyle, Buddy J.; Ball, Sydney Hobart; Walker, Samuel

doi:10.1016/j.lithos.2004.03.022

Cited by 20 publications

(5 citation statements)

References 7 publications

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“…Syn-and postmagmatic release of alkalies from carbonatite magmas and rocks is recorded respectively in alkaline (Na-and K-rich) metasomatic "fenitisation halos" around intrusive carbonatite bodies (see review in (Le Bas, 2008) and references therein) and rapid decomposition of alkali-and chlorinebearing minerals in the natrocarbonatites (e.g., Dawson, 1962;Genge et al, 2001;Keller and Zaitsev, 2006;Mitchell, 2006;Zaitsev and Keller, 2006). Same processes can be applicable to kimberlitic magmas in general, during and after their crustal emplacement, as recorded in fenitisation of country rocks ( (Masun et al, 2004;Smith et al, 2004) and references therein).…”

Section: Discussionmentioning

confidence: 99%

How unique is the Udachnaya-East kimberlite? Comparison with kimberlites from the Slave Craton (Canada) and SW Greenland

Kamenetsky

Weiss

et al. 2009

Lithos

132

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Section: Discussionmentioning

confidence: 99%

How unique is the Udachnaya-East kimberlite? Comparison with kimberlites from the Slave Craton (Canada) and SW Greenland

Kamenetsky

Weiss

et al. 2009

Lithos

132

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“…Kimberlites are the most widespread form of post-Archean small-volume mantle-derived magmatism in the Slave craton. It spans a period of~560 Ma from the emplacement of the 613-Ma Anuri pipe to the eruption of Eocene kimberlites in the Lac de Gras area [14,15]. There is a distinct correlation between the spatial distribution of kimberlites and the timing of magmatism, which allows the craton to be subdivided into four domains ( [4,15].…”

Section: Regional Geologymentioning

confidence: 99%

Zircon Macrocrysts from the Drybones Bay Kimberlite Pipe (Northwest Territories, Canada): A High-Resolution Trace Element and Geochronological Study

et al. 2018

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Zircon macrocrysts in (sub)volcanic silica-undersaturated rocks are an important source of information about mantle processes and their relative timing with respect to magmatism. The present work describes variations in trace element (Sc, Ti, Y, Nb, lanthanides, Hf, Ta, Pb, Th, and U) and isotopic (U-Pb) composition of zircon from the Drybones Bay kimberlite, Northwest Territories, Canada. These data were acquired at a spatial resolution of ≤100 µm and correlated to the internal characteristics of macrocrysts (imaged using cathodoluminescence, CL). Six types of zircon were distinguished on the basis of its luminescence characteristics, with the majority of grains exhibiting more than one type of CL response. The oscillatory-zoned core and growth sectors of Drybones Bay zircon show consistent variations in rare-earth elements (REE), Hf, Th, and U. Their chondrite-normalized REE patterns are typical of macrocrystic zircon and exhibit extreme enrichment in heavy lanthanides and a positive Ce anomaly. Their Ti content decreases slightly from the core into growth sectors, but the Ti-in-zircon thermometry gives overlapping average crystallization temperatures (820 ± 26 • C to 781 ± 19 • C, respectively). There is no trace element or CL evidence for Pb loss or other forms of chemical re-equilibration. All distinct zircon types are concordant and give a U-Pb age of 445.6 ± 0.8 Ma. We interpret the examined macrocrysts as products of interaction between a shallow (<100 km) mantle source and transient kimberlitic melt.

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“…Syn-and postmagmatic release of alkalies from carbonatite magmas and rocks is recorded respectively in alkaline (mainly soda-dominant) metasomatic "fenitisation halos" around intrusive carbonatite bodies (e.g., (Bailey, 1993;Buhn & Rankin, 1999;Le Bas, 1987;McKie, 1966;Morogan & Lindblom, 1995) and references therein) and rapid decomposition of alkali-and chlorine-bearing minerals in the natrocarbonatites (Dawson, 1962b;Genge et al, 2001;Mitchell, 2006). Same processes can be applicable to kimberlitic magmas in general, during and after their emplacement, as recorded in fenitisation of country rocks (Masun et al, 2004;Smith et al, 2004 and references therein) and gradation from Na-rich "deep" to Na-poor "shallow" kimberlite in the Udachnaya-East pipe.…”

Section: Implications From Kimberlites and Carbonatites Worldwidementioning

confidence: 99%

Advances in Data, Methods, Models and Their Applications in Geoscience

Chen¹

2011

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as a GIS product specialist for two years. Her research interests focus mainly on understanding and modeling of interactions between human activities and physical environment by using geographic information science, remote sensing, spatial analysis and modeling technologies. She has worked on more than twenty funded environmental-and health-related research projects, and published over fifty journal articles and book chapters. Prof. Chen has received research awards from American Society for Photogrammetry and Remote Sensing,

show abstract

The geology and mineralogy of the Anuri kimberlite, Nunavut, Canada

Cited by 20 publications

References 7 publications

How unique is the Udachnaya-East kimberlite? Comparison with kimberlites from the Slave Craton (Canada) and SW Greenland

How unique is the Udachnaya-East kimberlite? Comparison with kimberlites from the Slave Craton (Canada) and SW Greenland

Zircon Macrocrysts from the Drybones Bay Kimberlite Pipe (Northwest Territories, Canada): A High-Resolution Trace Element and Geochronological Study

Advances in Data, Methods, Models and Their Applications in Geoscience

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