1-20 OF 119 RESULTS FOR

Panda Kimberlite

Results shown limited to content with bounding coordinates.
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

Mineral inclusions in diamonds from the Panda kimberlite, Slave Province, Canada Available to Purchase

Ralf TAPPERT, Thomas STACHEL, Jeffrey W. HARRIS, Nobumichi SHIMIZU, Gerhard P. BREY
Published: 01 May 2005
European Journal of Mineralogy (2005) 17 (3): 423–440.
DOI: https://doi.org/10.1127/0935-1221/2005/0017-0423
...Ralf TAPPERT; Thomas STACHEL; Jeffrey W. HARRIS; Nobumichi SHIMIZU; Gerhard P. BREY Abstract Ninety diamonds from the Eocene Panda kimberlite (Ekati Mine, Northwest Territories, Canada) were analyzed for the major and trace element compositions of their mineral inclusions using electron microprobe...
FIGURES | View All (13)
View PDF for article title, Mineral inclusions in diamonds from the <span class="search-highlight">Panda</span> <span class="search-highlight">kimberlite</span>, Slave Province, Canada
Purchase
Add to Citation Manager for Mineral inclusions in diamonds from the <span class="search-highlight">Panda</span> <span class="search-highlight">kimberlite</span>, Slave Province, Canada
Image
(a) Diamonds from the Panda kimberlite, Ekati deposit, Northwest Territories, Canada. This selection illustrates the colorless octahedra (5), a deformed slightly brown octahedron, a coated stone, resorbed forms (2), irregular brown diamonds (2), and opaque fibrous cuboid diamonds (3). Sharp-edged, flat-faced unresorbed octahedra are a strong feature of Panda diamonds as shown in Figure 5. (b) Diamonds from the Misery kimberlite, Ekati, Northwest Territories, Canada. This selection illustrates the relatively high degree of resorption shown by most diamonds at the Misery location, with most diamonds being rounded tetrahexahedra, irrespective of color. Fibrous cuboid and coated stones are not represented at Misery. Diamond sizes in this figure range from ~0.5 to ~4 cts.

(a) Diamonds from the Panda kimberlite, Ekati deposit, Northwest Territorie... Available to Purchase

Published: 01 May 2010
F ig . 6. (a) Diamonds from the Panda kimberlite, Ekati deposit, Northwest Territories, Canada. This selection illustrates the colorless octahedra (5), a deformed slightly brown octahedron, a coated stone, resorbed forms (2), irregular brown diamonds (2), and opaque fibrous cuboid diamonds (3
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...
FIGURES | View All (6)
View PDF for article title, Transmission X-ray diffraction as a new tool for diamond fluid inclusion studies
Purchase
Add to Citation Manager for Transmission X-ray diffraction as a new tool for diamond fluid inclusion studies
Journal Article

Growth zoning and strain patterns inside diamond crystals as revealed by Raman maps Available to Purchase

Lutz Nasdala, Wolfgang Hofmeister, Jeffrey W. Harris, Jürgen Glinnemann
Published: 01 April 2005
American Mineralogist (2005) 90 (4): 745–748.
DOI: https://doi.org/10.2138/am.2005.1690
... to inclusions, by patterns of heterogeneous strain in the diamond. We present Raman maps obtained from diamond crystals containing large, single-crystal graphite inclusions, from the Panda kimberlite, Ekati Diamond Mine, Canada. The diamond growth texture was always found to start from the graphite inclusion...
FIGURES
View PDF for article title, Growth zoning and strain patterns inside diamond crystals as revealed by Raman maps
Purchase
Add to Citation Manager for Growth zoning and strain patterns inside diamond crystals as revealed by Raman maps
Journal Article

Spectroscopic 2D-tomography : Residual pressure and strain around mineral inclusions in diamonds Available to Purchase

Lutz NASDALA, Frank E. BRENKER, Jürgen GLINNEMANN, Wolfgang HOFMEISTER, Tibor GASPARIK, Jeffrey W. HARRIS, Thomas STACHEL, Ingo REESE
Published: 01 November 2003
European Journal of Mineralogy (2003) 15 (6): 931–935.
DOI: https://doi.org/10.1127/0935-1221/2003/0015-0931
... from the Panda kimberlite, Ekati diamond mines, Canada. Using the in situ point-by-point mapping technique with a confocal Raman system, the mineralogy of the inclusions, as well as their area distribution pattern ( e.g. , of different Ca-silicate phases) and their order-disorder distribution pattern...
FIGURES
View PDF for article title, Spectroscopic 2D-tomography : Residual pressure and strain around mineral inclusions in diamonds
Purchase
Add to Citation Manager for Spectroscopic 2D-tomography : Residual pressure and strain around mineral inclusions in diamonds
Image
Aggregation level (percentage of higher aggregated B-center relative to the A-center) versus nitrogen concentration (atomic ppm) in Type I diamonds from the Panda kimberlite. Dotted lines are isotherms of ambient mantle temperatures calculated using the activation energy for the conversion of the A- to B-center derived by Taylor et al. (1990). A residence time of 3.4 billion years was assumed for the calculations, which is consistent with isochrone ages found for sulfides inclusions in Panda diamonds (Westerlund et al., 2003) and a Tertiary kimberlite eruption age. Circles: peridotitic diamonds, diamond symbol: eclogitic diamonds. Black symbols mark diamonds that do not show signs of plastic deformation. Note that one eclogitic diamond with a nitrogen content of 2720 at.ppm is not shown in the diagram.

Aggregation level (percentage of higher aggregated B-center relative to the... Available to Purchase

Published: 01 May 2005
Fig. 12. Aggregation level (percentage of higher aggregated B-center relative to the A-center) versus nitrogen concentration (atomic ppm) in Type I diamonds from the Panda kimberlite. Dotted lines are isotherms of ambient mantle temperatures calculated using the activation energy
Image
Rare examples of true Re–Os isochrons (MSWD &lt; 2.4) derived from diamond-hosted BMS grains recovered from the Slave Craton, Canada. (a) Re–Os isochron age of 3.27 ± 0.34 Ga (MSWD = 0.75) for BMS grains recovered from xenocrystic olivine and pyroxenes from kimberlites in the Lac de Gras area, central Slave Craton (modified after Aulbach et al. 2004a). (b) Re–Os isochron age of 3.52 ± 0.17 (MSWD = 0.46) derived from diamonds in harzburgitic host rocks from the 53 Ma Panda kimberlite pipe, Ekati Mine, North West Territories, Canada (modified after Westerlund et al 2006).

Rare examples of true Re–Os isochrons (MSWD < 2.4) derived from diamond-... Open Access

Published: 01 January 2016
Gras area, central Slave Craton (modified after Aulbach et al. 2004a ). (b) Re–Os isochron age of 3.52 ± 0.17 (MSWD = 0.46) derived from diamonds in harzburgitic host rocks from the 53 Ma Panda kimberlite pipe, Ekati Mine, North West Territories, Canada (modified after Westerlund et al 2006 ).
Image
Re-Os isochron diagram for sulfide inclusions in diamonds and putative host harzburgites from the Panda kimberlite pipe, Slave craton, NWT, Canada (after Westerlund et al. 2006). The sulfide inclusions (red squares) regress to an age of 3.52 ± 0.17 Ga (with 4 additional inclusions off scale) and have an elevated initial 187Os/188Os isotope composition compared to a 3.5 Ga mantle (black line). With one exception, harzburgites that host the diamonds (green crosses) have 187Os/188Os ratios above primitive mantle values, but less so than the diamonds. The upper left panel shows a polished Panda diamond plate with 4 inclusions in their “rosette” fracture system. Shown in the upper right is a typical scanning electron micrograph of a released inclusion prior to dissolution, chemical separation of the Re and Os, and mass spectrometry.

Re-Os isochron diagram for sulfide inclusions in diamonds and putative host... Available to Purchase

Published: 01 August 2008
FIGURE 2 Re-Os isochron diagram for sulfide inclusions in diamonds and putative host harzburgites from the Panda kimberlite pipe, Slave craton, NWT, Canada (after Westerlund et al. 2006 ). The sulfide inclusions (red squares) regress to an age of 3.52 ± 0.17 Ga (with 4 additional inclusions off
Image
Compositions of carbonatite melt microinclusions in diamonds worldwide in comparison with the liquidus isotherms in the K2CO3-MgCO3-CaCO3 system at 6 GPa. SN94 = fibrous diamonds with cubic morphology from Jwaneng, Botswana (Schrauder and Navon 1994); W09 = coated octahedral diamonds from Kankan, Guinea (Weiss et al. 2009); T06 = coated octahedral diamonds from the Panda kimberlite, Canada (Tomlinson et al. 2006); Z07 = cuboid fibrous diamonds from the Udachnaya kimberlite, Russia (Zedgenizov et al. 2007); K09U, K09Z, K09Y, K09A = fibrous diamonds with cubic morphology from the Udachnaya, Zarnitsa, Yubileinaya, Aykhal kimberlite pipes, Russia (Klein-BenDavid et al. 2009); Z09 = cuboid diamonds with fibrous inner zone from Internationalnaya kimberlite, Russia (Zedgenizov et al. 2009); Z11 = fibrous diamonds with cubic and semirounded morphology from the Ebelyakh placers, northeastern Siberian Platform, Russia (Zedgenizov et al. 2011). Z = fibrous diamonds from Yubileinaya kimberlite, Russia (Zedgenizov et al., unpublished).

Compositions of carbonatite melt microinclusions in diamonds worldwide in c... Available to Purchase

Published: 01 February 2016
diamonds from Kankan, Guinea ( Weiss et al. 2009 ); T06 = coated octahedral diamonds from the Panda kimberlite, Canada ( Tomlinson et al. 2006 ); Z07 = cuboid fibrous diamonds from the Udachnaya kimberlite, Russia ( Zedgenizov et al. 2007 ); K09U, K09Z, K09Y, K09A = fibrous diamonds with cubic morphology
Image
Re-Os isochron diagrams for sulfide inclusion-bearing diamonds and associated garnet harzburgite xenoliths from the Panda kimberlite, Slave craton (after Westerlund at al., 2006). (a) Multiple sulfide inclusions from single diamonds are joined by thick shaded lines. Diamonds showing coherent internal isotopic systematics (shaded lines subparallel to the overall regression line) yield an isochron age of 3.52 ± 0.17 Ga. Those showing internal disequilibrium (inset) suggest mixing between subduction fluids and related harzburgitic host rocks. (b) Garnet harzburgites (crosses) scatter between the sulfide inclusion isochron and hypothetical depleted harzburgite precursors. Re-Os isotopic mixing is illustrated (arrows) between subduction fluids with the radiogenic Os isotope compositions of the sulfide inclusions and estimated harzburgites with chondritic initial Os isotope compositions.

Re-Os isochron diagrams for sulfide inclusion-bearing diamonds and associat... Available to Purchase

Published: 01 May 2010
F ig . 3. Re-Os isochron diagrams for sulfide inclusion-bearing diamonds and associated garnet harzburgite xenoliths from the Panda kimberlite, Slave craton (after Westerlund at al., 2006 ). (a) Multiple sulfide inclusions from single diamonds are joined by thick shaded lines. Diamonds showing
Image
Illustration of δ34S-Δ33S (a) and δ15N-Δ33S (b) covariations in sulfide-bearing diamonds. Filled triangles and filled diamonds correspond to sulfides from peridotitic and eclogitic diamonds respectively from the Ekati mine, Canada (Panda kimberlite; Cartigny et al. 2009); open diamonds are eclogitic sulfides from the Jwaneng and Orapa kimberlites, Botswana (Farquhar et al. 2002; Thomassot et al. 2009). Note that almost no samples fall within the Archean subduction field. The inconsistency between the evidence for the occurrence for subucted sulfur in sulfide inclusion (from non zero Δ33S) and absence (from negative δ15N) could be reconciled considering metasomatic diamond formation enclosing a pre-existing sulfide although the N isotopic composition of the Archean mantle is poorly known (see text for details). Dashed line: conductive geotherms for a surface heat flow of 40 mW/m2 after Pollack and Chapman (1977); black solid line: graphite-diamond boundary after Day (2012); grey band: T range for mantle adiabat based on mantle potential temperatures of 1300 to 1400 °C. (Used by permission of Elsevier Limited, from Cartigny et al. (2009)Lithos, Vol. 112S, Fig. 6, p. 861)

Illustration of δ 34 S-Δ 33 S (a) and δ 15 N-Δ 33 S (b) covariations in sul... Available to Purchase

Published: 01 January 2013
Figure 16 Illustration of δ 34 S-Δ 33 S (a) and δ 15 N-Δ 33 S (b) covariations in sulfide-bearing diamonds. Filled triangles and filled diamonds correspond to sulfides from peridotitic and eclogitic diamonds respectively from the Ekati mine, Canada (Panda kimberlite; Cartigny et al. 2009 ); open
Image
Photomicrographs and Raman maps of two diamond crystals from the Panda kimberlite. Sample PAG03: (a) View along [111]. The graphite inclusion is located more than 1 mm below a diamond (111) face. A small disc-like, ellipsoidal fracture in the diamond surrounding the graphite is indicated by light grayish color. (b) Raman map based on the FWHM of the diamond LO=TO band. The octahedral growth zoning is overprinted by a pattern (black) of intense strain in the diamond host, close to the graphite crystal and right outside the ellipsoidal fracture. Sample PAG12: (c) Photomicrograph of the graphite inclusion. View along diamond [110] [which is reasonably close to along graphite (001)]. (d) Raman map (sampling depth ~700 μm behind the diamond surface), revealing the diamond’s growth texture and internal strain pattern. (e) Photomicrograph, cross-polarized light. Note the brownish to violet-blue interference colors of the diamond close to the graphite (001) faces. (f) Raman map of the same area as shown in Figures c and e, based on the frequency of the LO=TO phonon. Areas without notable strain are visualized green (measured Raman shift ~1332 cm−1). Micro-areas affected by compressive strain (i.e., remnant internal pressure) are blue-black, and those affected by strong dilative strain (close to the ends of fractures) are red-yellow.

Photomicrographs and Raman maps of two diamond crystals from the Panda kimb... Available to Purchase

Published: 01 April 2005
F igure 2. Photomicrographs and Raman maps of two diamond crystals from the Panda kimberlite. Sample PAG03: ( a ) View along [111]. The graphite inclusion is located more than 1 mm below a diamond (111) face. A small disc-like, ellipsoidal fracture in the diamond surrounding the graphite
Image
(A) Calculation of maximum diamond oxidation rates occurring during groundmass crystallization in the Panda, Grizzly and Misery kimberlites at 1000, 800 and 600 °C. The ΔNNO values for the three kimberlites are from Canil &amp; Bellis (2007): (B) Model calculations of the effect of oxidation rates on the final diamond grade for the three kimberlites. An initial grade of 2 ct/ton is assumed based on the grades given in Table 3.

(A) Calculation of maximum diamond oxidation rates occurring during groundm... Available to Purchase

Published: 01 June 2009
Fig. 8. (A) Calculation of maximum diamond oxidation rates occurring during groundmass crystallization in the Panda, Grizzly and Misery kimberlites at 1000, 800 and 600 °C. The ΔNNO values for the three kimberlites are from Canil & Bellis (2007) : (B) Model calculations of the effect
Journal Article

Eitelite in sheared peridotite xenoliths from Udachnaya-East kimberlite pipe (Russia) – a new locality and host rock type Available to Purchase

Igor S. Sharygin, Alexander V. Golovin, Andrey V. Korsakov, Nikolay P. Pokhilenko
Published: 01 December 2013
European Journal of Mineralogy (2013) 25 (5): 825–834.
DOI: https://doi.org/10.1127/0935-1221/2013/0025-2315
... of the Panda kimberlite diatreme, Slave craton, Canada ( Smith et al ., 2011 ). An Fe-rich variety of eitelite Na 2 (Mg 0.6 Fe 0.3 Mn 0.1 )(CO 3 ) 2 was also reported in hydrothermalites of the Khibiny alkaline igneous complex, Kola Peninsula, Russia ( Khomyakov et al ., 1980a and b ). The occurrence...
FIGURES | View All (8)
View PDF for article title, Eitelite in sheared peridotite xenoliths from Udachnaya-East <span class="search-highlight">kimberlite</span> pipe (Russia) – a new locality and host rock type
Purchase
Add to Citation Manager for Eitelite in sheared peridotite xenoliths from Udachnaya-East <span class="search-highlight">kimberlite</span> pipe (Russia) – a new locality and host rock type
Includes: Supplemental Content
Journal Article

Using Microdiamonds in Kimberlite Diamond Grade Prediction: A Case Study of the Variability in Diamond Population Characteristics Across the Size Range 0.2 to 3.4 mm in Misery Kimberlite, Ekati Mine, NWT, Canada Available to Purchase

M. Y. Krebs, D. G. Pearson, T. Stachel, R. A. Stern, T. Nowicki, S. Cairns
Journal: Economic Geology
Published: 01 March 2016
Economic Geology (2016) 111 (2): 503–525.
DOI: https://doi.org/10.2113/econgeo.111.2.503
...-trending central corridor, encompassing the Southern Slave, Lac de Gras, and Jericho fields. Re-Os dating of sulfide inclusions from peridotitic diamonds from the Panda (Ekati) and A154 South (Diavik) kimberlites established that Central Slave peridotitic diamonds are Paleoarchean (3.5–3.3 Ga; Westerlund...
FIGURES | View All (13)
View PDF for article title, Using Microdiamonds in <span class="search-highlight">Kimberlite</span> Diamond Grade Prediction: A Case Study of the Variability in Diamond Population Characteristics Across the Size Range 0.2 to 3.4 mm in Misery <span class="search-highlight">Kimberlite</span>, Ekati Mine, NWT, Canada
Purchase
Add to Citation Manager for Using Microdiamonds in <span class="search-highlight">Kimberlite</span> Diamond Grade Prediction: A Case Study of the Variability in Diamond Population Characteristics Across the Size Range 0.2 to 3.4 mm in Misery <span class="search-highlight">Kimberlite</span>, Ekati Mine, NWT, Canada
Includes: Supplemental Content
Image

Kimberlite Ages and Diamond Ages from Slave Province Kimberlites and Diamon... Available to Purchase

Published: 01 May 2010
T able 2. Kimberlite Ages and Diamond Ages from Slave Province Kimberlites and Diamond Mines (*) Name of kimberlite Emplacement age (Ma) P-type harzburgitic (Ga) P-type Iherzolitic E-type (Ga) FD References Inclusion ages: 6 = Aulbach et al. (2008) , 8 = Westerlund et
Image

Kimberlite Ages and Diamond Ages from Slave Province Kimberlites and Diamon... Available to Purchase

Published: 01 May 2010
T able 2. Kimberlite Ages and Diamond Ages from Slave Province Kimberlites and Diamond Mines (*) Name of kimberlite Emplacement age (Ma) P-type harzburgitic (Ga) P-type Iherzolitic E-type (Ga) FD References Inclusion ages: 6 = Aulbach et al. (2008) , 8 = Westerlund et
Image

Kimberlite Ages and Diamond Ages from Slave Province Kimberlites and Diamon... Available to Purchase

Published: 01 May 2010
T able 2. Kimberlite Ages and Diamond Ages from Slave Province Kimberlites and Diamond Mines (*) Name of kimberlite Emplacement age (Ma) P-type harzburgitic (Ga) P-type Iherzolitic E-type (Ga) FD References Inclusion ages: 6 = Aulbach et al. (2008) , 8 = Westerlund et
Journal Article

Nature and evolution of the Slave Province subcontinental lithospheric mantle This article is one of a series of papers published in this Special Issue on the theme Lithoprobe — parameters, processes, and the evolution of a continent . Available to Purchase

Larry M. Heaman, D. Graham Pearson
Published: 29 April 2010
Canadian Journal of Earth Sciences (2010) 47 (4): 369–388.
DOI: https://doi.org/10.1139/E09-046
... been obtained from kimberlites that have been mined for diamonds: Ekati cluster (e.g., 53 Ma Panda; Fung 1998 ; Jacob et al. 2003 ), Diavik cluster (e.g., 55 Ma A154S; Pearson et al. 1999 a ; Griffin et al. 1999 ; Aulbach et al. 2004 , 2007 a , 2007 b ; Schmidberger et al. 2007 ), and 172 Ma...
FIGURES | View All (4)
View PDF for article title, Nature and evolution of the Slave Province subcontinental lithospheric mantle This article is one of a series of papers published in this Special Issue on the theme Lithoprobe — parameters, processes, and the evolution of a continent .
Purchase
Add to Citation Manager for Nature and evolution of the Slave Province subcontinental lithospheric mantle This article is one of a series of papers published in this Special Issue on the theme Lithoprobe — parameters, processes, and the evolution of a continent .
Journal Article

Applications of PGE Radioisotope Systems in Geo- and Cosmochemistry Available to Purchase

Richard W. Carlson, Steven B. Shirey, Maria Schönbächler
Journal: Elements
Published: 01 August 2008
Elements (2008) 4 (4): 239–245.
DOI: https://doi.org/10.2113/GSELEMENTS.4.4.239
...FIGURE 2 Re-Os isochron diagram for sulfide inclusions in diamonds and putative host harzburgites from the Panda kimberlite pipe, Slave craton, NWT, Canada (after Westerlund et al. 2006 ). The sulfide inclusions (red squares) regress to an age of 3.52 ± 0.17 Ga (with 4 additional inclusions off...
FIGURES | View All (7)
View PDF for article title, Applications of PGE Radioisotope Systems in Geo- and Cosmochemistry
Purchase
Add to Citation Manager for Applications of PGE Radioisotope Systems in Geo- and Cosmochemistry