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Jericho Kimberlite

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Journal Article

Petrology and textural classification of the Jericho kimberlite, northern Slave Province, Nunavut, Canada Available to Purchase

Maya G. Kopylova, Patrick Hayman
Published: 22 July 2008
Canadian Journal of Earth Sciences (2008) 45 (6): 701–723.
DOI: https://doi.org/10.1139/E08-011
...Maya G. Kopylova; Patrick Hayman Abstract 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...
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View PDF for article title, Petrology and textural classification of the <span class="search-highlight">Jericho</span> <span class="search-highlight">kimberlite</span>, northern Slave Province, Nunavut, Canada
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Journal Article

Origin of megacrysts by carbonate-bearing metasomatism: a case study for the Muskox kimberlite, Slave craton, Canada Available to Purchase

Dylan Cone, Maya Kopylova
Published: 25 February 2021
Journal of the Geological Society (2021) 178 (3): jgs2020-184.
DOI: https://doi.org/10.1144/jgs2020-184
..., and clinopyroxene isotope systematics reveal similarities to both websteritic and metasomatic clinopyroxene in peridotites from the same kimberlite, in addition to Muskox and Jericho kimberlites. All lithologies may represent the products of mixing between EM1 mantle, relict Proterozoic enriched mantle and HIMU...
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View PDF for article title, Origin of megacrysts by carbonate-bearing metasomatism: a case study for the Muskox <span class="search-highlight">kimberlite</span>, Slave craton, Canada
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Journal Article

In situ analysis of garnet inclusion in diamond using single-crystal X-ray diffraction and X-ray micro-tomography Available to Purchase

Fabrizio Nestola, Marcello Merli, Paolo Nimis, Matteo Parisatto, Maya Kopylova, Andrea De Stefano, Micaela Longo, Luca Ziberna, Murli Manghnani
Published: 01 August 2012
European Journal of Mineralogy (2012) 24 (4): 599–606.
DOI: https://doi.org/10.1127/0935-1221/2012/0024-2212
...Fabrizio Nestola; Marcello Merli; Paolo Nimis; Matteo Parisatto; Maya Kopylova; Andrea De Stefano; Micaela Longo; Luca Ziberna; Murli Manghnani Abstract A single crystal of garnet enclosed in a diamond from the Jericho kimberlite (Slave Craton, Canada) has been investigated using X-ray diffraction...
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View PDF for article title, In situ analysis of garnet inclusion in diamond using single-crystal X-ray diffraction and X-ray micro-tomography
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Journal Article

Peridotite and pyroxenite xenoliths from the Muskox kimberlite, northern Slave craton, Canada Available to Purchase

David E. Newton, Maya G. Kopylova, Jennifer Burgess, Pamela Strand
Published: 12 November 2015
Canadian Journal of Earth Sciences (2016) 53 (1): 41–58.
DOI: https://doi.org/10.1139/cjes-2015-0083
... MPa), 1200–1350 °C and 57–70 kbar, and 1030–1230 °C and 50–63 kbar, respectively. The Muskox xenoliths differ from xenoliths in the neighboring and contemporaneous Jericho kimberlite by their higher levels of depletion, the presence of a shallow zone of metasomatism in the spinel peridotite field...
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View PDF for article title, Peridotite and pyroxenite xenoliths from the Muskox <span class="search-highlight">kimberlite</span>, northern Slave craton, Canada
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Journal Article

Transmission X-ray diffraction as a new tool for diamond fluid inclusion studies Available to Purchase

E. M. Smith, M. G. Kopylova, L. Dubrovinsky, O. Navon, J. Ryder, E. L. Tomlinson
Published: 01 October 2011
Mineralogical Magazine (2011) 75 (5): 2657–2675.
DOI: https://doi.org/10.1180/minmag.2011.075.5.2657
... through the sample, interacting with a volume of material. Fibrous diamonds from Mbuji-Mayi, Democratic Republic of Congo; the Wawa area, Ontario, Canada; and the Panda kimberlite, Ekati Mine, Northwest Territories and the Jericho kimberlite, Nunavut, Canada were analysed using X-rays from a high...
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View PDF for article title, Transmission X-ray diffraction as a new tool for diamond fluid inclusion studies
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Journal Article

Extreme enrichment of high field strength elements in Jericho eclogite xenoliths: A cryptic record of Paleoproterozoic subduction, partial melting, and metasomatism beneath the Slave craton, Canada Available to Purchase

Larry M. Heaman, Robert A. Creaser, Harrison O. Cookenboo
Journal: Geology
Published: 01 June 2002
Geology (2002) 30 (6): 507–510.
DOI: https://doi.org/10.1130/0091-7613(2002)030<0507:EEOHFS>2.0.CO;2
...Larry M. Heaman; Robert A. Creaser; Harrison O. Cookenboo Abstract An unusual suite of zircon- and rutile-bearing eclogite xenoliths from the 172 Ma Jericho kimberlite, Northwest Territories, Canada, displays a peculiar geochemistry highlighted by extreme enrichment of high field strength elements...
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View PDF for article title, Extreme enrichment of high field strength elements in <span class="search-highlight">Jericho</span> eclogite xenoliths: A cryptic record of Paleoproterozoic subduction, partial melting, and metasomatism beneath the Slave craton, Canada
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(a) Pressure-temperature projection showing maximum and minimum temperatures calculated for Cr-diopside xenocrysts from Torrie kimberlite (circles) and from Sputnik kimberlite (diamonds). Results are shown along the geotherm derived for the Torrie kimberlite by MacKenzie and Canil (1999) and for the Jericho kimberlite by Kopylova et al. (1998, 1999). Dashed lines connect equivalent samples for the two kimberlite bodies. For reference, also shown is the diamond-graphite reaction boundary (calculated with Thermocalc v.2.7, Holland and Powell 1998). (b) Histograms showing the distribution of calculated temperatures for Cr-diopside xenocrysts from Torrie (unshaded bars) and Sputnik (shaded bars). Top histogram calculated for the Torrie geotherm illustrated in Fig. 2a, bottom histogram calculated for the Jericho geotherm (Fig. 2a).

( a ) Pressure-temperature projection showing maximum and minimum temperatu... Available to Purchase

Published: 18 July 2000
( 1999 ) and for the Jericho kimberlite by Kopylova et al. ( 1998 , 1999 ). Dashed lines connect equivalent samples for the two kimberlite bodies. For reference, also shown is the diamond-graphite reaction boundary (calculated with Thermocalc v.2.7, Holland and Powell 1998 ). ( b ) Histograms showing
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Fig. 3. Subsurface maps of (A) the eastern dyke, (B), northern and southe... Available to Purchase

Published: 22 July 2008
Fig. 3. Subsurface maps of (A) the eastern dyke, (B), northern and southern lobes, and (C) central lobe of the Jericho kimberlite. Contour interval 50 m, datum at surface (modified from Cookenboo1999 ). UTM coordinates, Zone 12.
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Cathodoluminescence of diamonds found in unmetamorphosed rocks. (a) Optical CL photographs of diamonds from the Jericho kimberlite, Nunavut, displaying the typical blue color. (b) CL spectrum of an alluvial diamond from Rio Soriso (Brazil). It is hypothesized that these diamonds were entrained in the mid-Cretaceous kimberlites and subsequently eroded into the Rio Soriso alluvial deposits (Hayman et al. 2005).

Cathodoluminescence of diamonds found in unmetamorphosed rocks. ( a ) Optic... Available to Purchase

Published: 01 January 2011
F igure 6. Cathodoluminescence of diamonds found in unmetamorphosed rocks. ( a ) Optical CL photographs of diamonds from the Jericho kimberlite, Nunavut, displaying the typical blue color. ( b ) CL spectrum of an alluvial diamond from Rio Soriso (Brazil). It is hypothesized that these diamonds
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Major element compositions of Muskox high-Cr (black circles) and low-Cr (red circles) megacrysts. (a, b) Cr2O3–CaO (wt%) in clinopyroxene; (c, d) Cr2O3–TiO2 (wt%) in garnet; (e) NiO–Mg# (100Mg/(Mg  +  Fe) moles) in olivine; (f) Cr2O3–MgO (wt%) in ilmenite. Our data have been compared with websterite (green field), coarse peridotite (grey field) and porphyroclastic peridotite (purple field) xenoliths from Muskox (a; Newton et al. 2015) and Jericho (c; Kopylova et al. 1999). Global megacryst data are from the Jericho kimberlite (b, d, f; Kopylova et al. 2009), Lac de Gras kimberlites (b, d; Bussweiler et al. 2018), Grib kimberlite (f; Kostrovitsky et al. 2004) and Luxinga kimberlite (f; Rogers and Grütter 2009). All Lac de Gras megacrysts (b, d) belong to the high-Cr suite, and fields of high- and low-Cr Jericho samples (b, d) are indicated. Olivine megacrysts (e) have been compared with kimberlitic olivine core (dashed fields) and rim (shaded fields) data for kimberlitic olivine from the Slave craton (Fedortchouk and Canil 2004; Brett et al. 2009; Bussweiler et al. 2015).

Major element compositions of Muskox high-Cr (black circles) and low-Cr (re... Available to Purchase

Published: 25 February 2021
data have been compared with websterite (green field), coarse peridotite (grey field) and porphyroclastic peridotite (purple field) xenoliths from Muskox ( a ; Newton et al. 2015 ) and Jericho ( c ; Kopylova et al. 1999 ). Global megacryst data are from the Jericho kimberlite ( b , d , f
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Calculated conditions of equilibration for the eclogite (upright triangle), the composite garnet–clinopyroxene megacryst (inverted triangle), and the garnet xenocryst with a clinopyroxene inclusion (diamond). The Torrie and Jericho kimberlite geotherms and the graphite-diamond reaction boundary (Fig. 2) are shown for reference.

Calculated conditions of equilibration for the eclogite (upright triangle),... Available to Purchase

Published: 18 July 2000
Fig. 7. Calculated conditions of equilibration for the eclogite (upright triangle), the composite garnet–clinopyroxene megacryst (inverted triangle), and the garnet xenocryst with a clinopyroxene inclusion (diamond). The Torrie and Jericho kimberlite geotherms and the graphite-diamond reaction
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Calculated conditions of equilibration for the garnet websterite, given different assumptions regarding the valence state of iron in the coexisting minerals. See legend for specifics and symbol notation, and text for details. The Torrie and Jericho kimberlite geotherms and the graphite-diamond reaction boundary (Fig. 2) are shown for reference.

Calculated conditions of equilibration for the garnet websterite, given dif... Available to Purchase

Published: 18 July 2000
Fig. 6. Calculated conditions of equilibration for the garnet websterite, given different assumptions regarding the valence state of iron in the coexisting minerals. See legend for specifics and symbol notation, and text for details. The Torrie and Jericho kimberlite geotherms and the graphite
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Fig. 9.

An enlarged plot of equilibrium pressure–temperature estimates for Muskox p... Available to Purchase

Published: 12 November 2015
Fig. 9. An enlarged plot of equilibrium pressure–temperature estimates for Muskox pyroxenites according to Brey and Köhler (1990) . Solid line is the geotherm constrained for xenoliths from the Jericho kimberlite, calculated using the BK P / BK T ( Kopylova et al. 1999 ). Samples plotted
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Figure 1. Geochemistry of eclogite xenoliths isolated from Jericho kimberlite, Northwest Territories, Canada. A: Chondrite-normalized rare earth element diagram. B: Incompatible element diagram normalized to normal mid-ocean-ridge basalt (N-MORB). Also shown for comparison is field for island-arc basalts and andesites formed by subduction-zone magmatism.

Figure 1. Geochemistry of eclogite xenoliths isolated from Jericho kimberli... Available to Purchase

Published: 01 June 2002
Figure 1. Geochemistry of eclogite xenoliths isolated from Jericho kimberlite, Northwest Territories, Canada. A: Chondrite-normalized rare earth element diagram. B: Incompatible element diagram normalized to normal mid-ocean-ridge basalt (N-MORB). Also shown for comparison is field for island-arc
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Fig. 8.

Equilibrium pressure–temperature estimates for Muskox (A) peridotites and (... Available to Purchase

Published: 12 November 2015
Fig. 8. Equilibrium pressure–temperature estimates for Muskox (A) peridotites and (B) pyroxenites according to Brey and Köhler (1990) . Solid line is the geotherm constrained for xenoliths from the Jericho kimberlite, calculated using the combined BK P / BK T ( Kopylova et al. 1999
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Figure 1. Temperature (T) vs. depth distribution of low-temperature (solid) and high-temperature (open symbols and shading) peridotite xenoliths from Jericho kimberlite pipe, Northwest Territories (see Kopylova et al., 1999). Model geotherm is fitted to T-depth data (Russell et al., 2001); dashed line shows graphite (G) and diamond (D) stability fields.

Figure 1. Temperature ( T ) vs. depth distribution of low-temperature (soli... Available to Purchase

Published: 01 May 2002
Figure 1. Temperature ( T ) vs. depth distribution of low-temperature (solid) and high-temperature (open symbols and shading) peridotite xenoliths from Jericho kimberlite pipe, Northwest Territories (see Kopylova et al., 1999 ). Model geotherm is fitted to T -depth data ( Russell et al., 2001
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Bulk chemical compositions of the 5034 kimberlite: TiO2versus K2O (A), Nb versus Zr (B). Also shown are compositional fields for Group I, Group IA, Group IB, and Group II kimberlites (Taylor et al. 1994); updated with new data of Mitchell (1995), O’Brien &amp; Tyni (1999), Coe et al.(2003), for the Aries kimberlite (Taylor et al. 1994), and the Jericho kimberlite (light grey line, Kopylova et al. 1998). Here and below, the model hybrid kimberlite (Table 1) is calculated as a mixture of the primary kimberlitic magma with mantle and crustal material. Here and on Figure 8, the 5034 macrocrystal diopside-free kimberlite include monticellite – phlogopite – serpentine kimberlite and phlogopite – serpentine kimberlite, whereas macrocrystal diopside-bearing kimberlite include all varieties of diopside-bearing kimberlite (with or without melilite and monticellite).

Bulk chemical compositions of the 5034 kimberlite: TiO 2 versus K 2 O (A)... Available to Purchase

Published: 01 February 2004
) , Coe et al. (2003) , for the Aries kimberlite ( Taylor et al. 1994 ), and the Jericho kimberlite (light grey line, Kopylova et al. 1998 ). Here and below, the model hybrid kimberlite ( Table 1 ) is calculated as a mixture of the primary kimberlitic magma with mantle and crustal material. Here
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εSr – εNd isotopic diagram showing the four data points of the 5034 kimberlite (open circles), which plot within the Group-I field of Kaapvaal kimberlites (Smith et al. 1985). The partial field of Group-II kimberlites is shown for reference. Sr–Nd data for other Slave Province kimberlites also are shown: the Jurassic Contwoyto and Jericho kimberlites (stars) and the Eocene kimberlites of the Lac de Gras field (Dowall et al. 2001). Also shown is a simple mixing trajectory between hypothetical primitive kimberlitic magma (εSr = −20, εNd = +1.5, Nd = 131 ppm, Sr = 840 ppm) and model Archean crust (see text for discussion). The mixing trajectory shows percentage increments of Archean crust added to a hypothetical kimberlitic magma and permit, but do not require, ~8–12% contamination of the kimberlites by Archean crust.

εSr – εNd isotopic diagram showing the four data points of the 5034 kimberl... Available to Purchase

Published: 01 February 2004
kimberlites also are shown: the Jurassic Contwoyto and Jericho kimberlites (stars) and the Eocene kimberlites of the Lac de Gras field ( Dowall et al. 2001 ). Also shown is a simple mixing trajectory between hypothetical primitive kimberlitic magma (εSr = −20, εNd = +1.5, Nd = 131 ppm, Sr = 840 ppm
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Isotopic compositions of Muskox megacrysts (black circles), Muskox websterite (green circles), primary peridotitic clinopyroxene (cyan circles), Muskox kimberlite (red stars) and Jericho kimberlite (blue stars). All analytical errors are smaller than symbols. Isotopic mixing models between EM1 mantle, a HIMU carbonatite and enriched ancient subcontinental lithospheric mantle are indicated by dashed lines. All measured ratios have been corrected for an emplacement age of 173 Ma (Heaman et al. 2006; Hayman et al. 2009) for both kimberlite pipes. (a) Joint in situ (dashed and dotted lines) and high-resolution 208Pb/206Pb v. 207Pb/206Pb for Muskox and Jericho samples compared with literature data for African kimberlites (orange field; Smith 1983; Davies et al. 2001), the Nikos kimberlite (blue field; Schmidberger and Francis 2001) and Gibeon megacrysts (yellow field; Davies et al. 2001). (b) 206Pb/204Pb v. 207Pb/204Pb isotopic compositions and mixing models. Samples are compared with data for cratonic peridotite (Schmidberger and Francis 2001; Wittig et al. 2007; Liu et al. 2012), clinopyroxene from MARID (Mica–Amphibole–Rutile–Ilmenite–Diopside) and PIC (Phlogopite–Ilmenite–Clinopyroxene) xenoliths (Fitzpayne et al. 2019) and East African carbonatites (Kalt et al. 1997; Bell and Tilton 2001). Continuous grey lines are the geochron and 1 Ga model isochron. (c) 206Pb/204Pb v. 143Nd/144Nd compositions of Muskox and Jericho samples compared with data for East African carbonatites (Kalt et al. 1997; Bell and Tilton 2001). Arrow points to peridotite sample MOX-3-33.0, which plots outside the boundaries of the figure. CHUR  =  0.512638. (d) 87Sr/86Sr v. 143Nd/144Nd data compared with existing Jericho megacryst and kimberlite data (Kopylova et al. 2009), megacrysts and kimberlite from South Africa (Nowell et al. 2004) and data for East African carbonatites (Kalt et al. 1997; Bell and Tilton 2001). BSE  =  0.70445.

Isotopic compositions of Muskox megacrysts (black circles), Muskox websteri... Available to Purchase

Published: 25 February 2021
Fig. 5. Isotopic compositions of Muskox megacrysts (black circles), Muskox websterite (green circles), primary peridotitic clinopyroxene (cyan circles), Muskox kimberlite (red stars) and Jericho kimberlite (blue stars). All analytical errors are smaller than symbols. Isotopic mixing models
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Synoptic cross section of the Slave craton (modified from Snyder, 2008); note bend in center near the Jericho kimberlite mine site (J). Petrological and geochronological control by xenolith/xenocryst analysis is indicated by the depth range (vertical bars); inferred base of lithosphere (Kopylova and Caro, 2004; Heaman and Pearson, 2010; Mather, 2012) is marked by circles. Numbers are modeled isotopic ages in Ga (Heaman and Pearson, 2010). Dashed lines indicate mantle seismic discontinuities; solid line at ∼40 km depth is Moho. Mantle geometries of various terranes are constrained by seismic discontinuities. H, X, and L mark mantle discontinuities beneath Yellowknife interpreted by Bostock (1998) projected to this section. WFZ—Wopmay fault zone; MDF—McDonald fault of Great Slave Lake shear zone. J, D, and GQ—Jericho, Diavik/Ekati, and Gahcho Kue diamond mine sites, respectively.

Synoptic cross section of the Slave craton (modified from Snyder, 2008 ); ... Open Access

Published: 01 December 2013
Figure 6. Synoptic cross section of the Slave craton (modified from Snyder, 2008 ); note bend in center near the Jericho kimberlite mine site (J). Petrological and geochronological control by xenolith/xenocryst analysis is indicated by the depth range (vertical bars); inferred base