 | | Journal (article/letter/editorial) | | perovskite from kimberlites of the Lac de Gras field (Northwest Territories, Canada) A. R. CHAKHMOURADIAN* AND...Ontario, Canada P7B 5E1 ABSTR ACT In hypabyssal and crater-facies kimberlites of the Lac de Gras kimberlite...found in an assemblage with perovskite include titanite, monazite(Ce), witherite, strontium-apatite, khibinskite...perovskite. The compositional variation of the Lac de Gras perovskite can be adequately characterized in...kimberlite, Lac de Gras kimberlite  eld, Canada. Introduction THE discovery of the Lac de Gras kimberlite |  | | Journal (article/letter/editorial) | | kimberlite volcanic activity in the Lac de Gras kimberlite field, Canada and some recommendations for kimberlite...kimberlite volcanic activity in the Lac de Gras kimberlite ïŹeld, Canada and some recommendations for kimberlite...VOLCANIC PT ACTIVITY IN THE LAC DE GRAS KIMBERLITE FIELD, RI CANADA AND SOME RECOMMENDATIONS FOR ...of Alberta, Edmonton, T6G MA 1 * TE D 2E3, CANADA Corresponding author (chiranjeeb.sarkar@ualberta...a key role in diamond exploration within the Lac de Gras kimberlite field. Nonetheless, emplacement age |  | | Journal (article/letter/editorial) | | University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada EKATERINA P. REGUIR and ROGER H. MITCHELL Department...Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada ABSTRACT The paragenesis and compositional variation...91â3.01Si0â 0.06)O12(F,OH). At Lac de Gras, Northwest Territories, Canada, strontium-apatite and Sr-rich...from the center of spherulites outward. The Lac de Gras apatite is inferred to contain carbon substituting...rocks, kimberlites, Lovozero, Murun, Lac de Gras, Russia, Canada. SOMMAIRE Nous caractĂ©risons la paragenĂšse |  | | Journal (article/letter/editorial) | | and the development of a craton, Slave Province, Canada W.J. Davis a,*, D. Canil b, J.M. MacKenzie c, G...d b a Geological Survey of Canada, 601 Booth Street, Ottawa, On, Canada K1A 0E8 School of Earth and...Victoria, BC, Canada V8W 3P6 c Redlen Crystals Ltd., 1290 Broad Street, Victoria, BC, Canada V8W 2A5 d Ericsson...Research, 8400 Decarie Boulevard, Mount Royal, QC, Canada H4P 2N2 Abstract Lower crustal xenoliths recovered...craton. U â Pb geochronology of zircon, rutile and titanite demonstrate a complex history in the lower crust |  | | Journal (article/letter/editorial) | | 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada ABSTRACT The present work summarizes a detailed...late-stage minerals, typically TiO2, ilmenite, titanite and calcite. Replacement reactions are believed...perovskite from some occurrences (Lac de Gras and Kirkland Lake in Canada, Obnazhennaya in Yakutia) probably...approfondie de la pĂ©rovskite telle quâelle se prĂ©sente dans une collection reprĂ©sentative de kimberlites...cristaux distincts dans une pĂąte composĂ©e de serpentine et de calcite, ou bien en liserĂ© rĂ©actionnel sur |  | Gruber, Benjamin, Chacko, Thomas, Pearson, D. Graham, Currie, Claire, Menzies, Andrew (2021) Heat production and moho temperatures in cratonic crust: evidence from lower crustal xenoliths from the slave craton. Lithos, 380. 105889pp. doi:10.1016/j.lithos.2020.105889 | Journal (article/letter/editorial) | | of Alberta, 116 St. and 85 Ave., Edmonton, AB, Canada T6G 2R3 Department of Physics, University of Alberta...116 St. and 85 Ave., Edmonton, AB, Canada T6G 2R3 3 Departamento de Ciencias Geologicas, Universidad CatĂłlica...from the Diavik A-154 kimberlite, Slave craton, Canada. Iron-magnesium exchange geothermometry on Journal...kimberlite pipe of the Diavik mine, Northwest Territories, Canada. These -p mineral analyses, combined...The A-154 kimberlite is part of the greater Lac de Gras kimberlite field of the central Slave lP craton |  | | Journal (article/letter/editorial) | | chromite, perovskite, phlogopite, apatite, ilmenite, titanite, sulphides, rutile and magnetite along with abundant...chromite, perovskite, phlogopite, apatite, ilmenite, titanite, sulphides, rutile and magnetite along with abundant...chromite, perovskite, phlogopite, apatite, ilmenite, titanite, sulphides, rutile and magnetite. This assemblage...a âlagoonâ composed of serpentine, calcite and titanite, and enclosed by a narrow rim(s) (â€5 ”m) of Timagnetite...grains are partially- or completely-mantled by T titanite reaction rims of variable thickness (<1 â 10 ”m; |  | Dalton, Hayden, Giuliani, Andrea, O'Brien, Hugh, Phillips, David, Hergt, Janet (2020) The role of lithospheric heterogeneity on the composition of kimberlite magmas from a single field: The case of Kaavi-Kuopio, Finland. Lithos, 354. 105333 doi:10.1016/j.lithos.2019.105333 | Journal (article/letter/editorial) | | kimberlites of a single cluster and field (e.g., Lac de Gras), the Kaavi-Kuopio al kimberlites appear to...Kimberley, South Africa) and fields (i.e. Lac de Gras, oo f Canada) which is taken to indicate similar primary...CaFe-silicates (potentially kirschsteinite) and titanite, the latter being a replacement phase of spinel...Ca(±Fe±Ti)-bearing phases and discrete grains of titanite, which al appears to be a primary phase based...pipe has also been observed in kimberlites from Lac de Gras (up to 7 ÎNNO units, Canil and Bellis, 2007) |  | Kaminsky, Felix, Matzel, Jennifer, Jacobsen, Ben, Hutcheon, Ian, Wirth, Richard (2016) Isotopic fractionation of oxygen and carbon in decomposed lower-mantle inclusions in diamond. Mineralogy and Petrology, 110 (2) 379-385 doi:10.1007/s00710-015-0401-7 | Journal (article/letter/editorial) | | 2446 Shadbolt Lane, West Vancouver, BC V7S 3J1, Canada 2 Lawrence Livermore National Laboratory, 7000...which starts at ca. 15 GPa with the formation of titanite (CaSi2O5), larnite (Ca2SiO4), walstromite (CaSiO3)...CaSiperovskite decomposed, with the formation of titanite (CaSi2O5), larnite (Ca2SiO4), walstromite (CaSiO3)...hypabyssal kimberlite, Lac de Gras, Slave Province, Northwest Territories, Canada. Lithos 76:415â433 Brenker...in hypabyssal kimberlite, Lac de Gras field, Northwest Territories, Canada. Chem Geol 242:435â454 Wirth |  | | Journal (article/letter/editorial) | | University of Alberta Edmonton, Alberta T6G 2E3 Canada E-mail: larry.heaman@ualberta.ca and gdpearso@ualberta...(e.g., apatite, baddeleyite, ilmenite, rutile, titanite), with varying degrees of success. Here, we describe...of the Eocene-toLate Cretaceous Lac de Gras field in northern Canada (Creaser et al. 2004). Eight phlogopite...analyses from the Cobra South kimberlite from Lac de Gras field yielded a high-precision RbâSr isochron...Sr isotopic constraints for samples from the Lac de Gras field. They confirmed that phlogopites with Rb/Sr |  | | Journal (article/letter/editorial) | | A154 kimberlite pipe in the Lac de Gras area, central Slave craton, Canada, and have been the subject...position of the Slave craton within northwestern Canada and of the Kaapvaal craton in southern Africa ...was assumed (=median ratio in eclogites from Lac de Gras) b From Aulbach et al. (2008) c Uncertainties...protoliths Reconstructed whole-rock eclogites from Lac de Gras show a striking correlation of Zr/Hf with inferred...cpx during formation of the precursor rocks to Lac de Gras eclogites could account for some of the observed |  | | Journal (article/letter/editorial) | | 224 ROCKS & MINERALS Gallery Ottawa, Ontario Canada Figure 2. The front of the Victoria Memorial Museum...13 round diamonds (from the Ekati mine, Northwest Territories) placed in the areas of the capital cities...cities of each province and territory of Canada. The diamond-set globe (42 cut stones, total weight about... where its exhibits feature natural history in Canada and the world. The Vale Earth Gallery occupies... Address: 240 McLeod Street, Ottawa, Ontario, Canada Website: http://nature.ca/en/plan-your-visit/directions |  | Agashev, Aleksey M., Nakai, Shunâichi, Serov, Ilya V., Tolstov, Aleksander V., Garanin, Konstantin V., Kovalchuk, Oleg E. (2018) Geochemistry and origin of the Mirny field kimberlites, Siberia. Mineralogy and Petrology, 112. 597-608 doi:10.1007/s00710-018-0617-4 | Journal (article/letter/editorial) | | (Kiselev et al. 2014). The peripheral faults with a northwest direction are connected with the major fault zones...primary kimberlite melts are present among the Lac de Gras kimberlites. However, at the initial stages all...kimberlite-carbonatite assemblages, Snap Lake dyke system, Canada. Chem Geol 255:317â328 Agashev AM, Orihashi Y,...kimberlites (Siberia) and application of Rutile and Titanite for UâPb dating of kimberlite emplacement by LA-ICP-MS...47:673â703 Bussweiler Y, Foley SF, PreleviÄ D, Jacob DE (2015) The olivine macrocryst problem: new insights |  | Chakhmouradian, Anton R., Reguir, Ekaterina P., Kamenetsky, Vadim S., Sharygin, Victor V., Golovin, Alexander V. (2013) Trace-element partitioning in perovskite: Implications for the geochemistry of kimberlites and other mantle-derived undersaturated rocks. Chemical Geology, 353. 112-131 doi:10.1016/j.chemgeo.2013.01.007 | Journal (article/letter/editorial) | | Manitoba, 125 Dysart Road, Winnipeg, Manitoba, Canada, R3T 2N2 School of Earth Sciences and Centre for...loss (see above). There are also cases (e.g., Lac de Gras kimberlites) where perovskite develops a discontinuous...Siberia) and the Grizzly pipe (Lac de Gras ïŹeld, Northwest Territories, Canada), and one sample of katungite...SX-100 electron-microprobe (University of Manitoba, Canada) operated at 15 kV and 20 nA with a beam size of...albite (Na); diopside (Si, Ca); orthoclase (K); titanite (Ti); andalusite (Al); NaBa2Nb5O15 (Ba, Nb); fayalite |  | Castillo-Oliver, Montgarri, GalĂ, Salvador, Melgarejo, Joan Carles, Griffin, William L., Belousova, Elena, Pearson, Norman J., Watangua, Manuel, O'Reilly, Suzanne Y. (2016) Trace-element geochemistry and UâPb dating of perovskite in kimberlites of the Lunda Norte province (NE Angola): Petrogenetic and tectonic implications. Chemical Geology, 426. 118-134 doi:10.1016/j.chemgeo.2015.12.014 | Journal (article/letter/editorial) | | [a] Department de Cristal·lografia, Mineralogia i DipĂČsits Minerals, Universitat de Barcelona, MartĂ...University, NSW 2019, Australia D [c] Sociedade Mineira de Catoca, Catoca, Lunda Sul, Angola CE P Abstract...(NW-NNW) corridors (Râ-shears) with the Lucapa Corridor (De Boorder, 1982). In Angola, the erosion rate of the...the Thin Section Service of the Universitat NU de Barcelona. Each sample was sawed into slices and...CientĂfics i TecnolĂČgics (CCiT) of the Universitat de Barcelona (UB) were used for the characterization |  | Zaccarini, F., Thalhammer, O. A.R., Princivalle, F., Lenaz, D., Stanley, C. J., Garuti, G. (2007) DJERFISHERITE IN THE GULI DUNITE COMPLEX, POLAR SIBERIA: A PRIMARY OR METASOMATIC PHASE?. The Canadian Mineralogist, 45 (5) 1201-1211 doi:10.2113/gscanmin.45.5.1201 | Journal (article/letter/editorial) | | phlogopite, plagioclase, apatite and rare zircon, titanite and pyrophanite. It forms crystals generally less...mantle, Siberia, Russia. SOMMAIRE La djerĂsherite, de formule idĂ©ale K6(Fe,Cu,Ni)25S26Cl, sulfure assez...dunite du complexe de Guli, situĂ©e en SibĂ©rie polaire, en Russie. Le complexe de Guli se distingue par...dimension, environ 2000 km2, ce qui en fait le massif de duniteâclinopyroxĂ©nite le plus grand au monde, et...gĂ©ologiques. Les afĂeurements consistent surtout (60%) de dunite variablement serpentinisĂ©e. Les roches alcalines |  | Aulbach, Sonja, Krauss, Cristen, Creaser, Robert A., Stachel, Thomas, Heaman, Larry M., Matveev, Sergei, Chacko, Thomas (2010) Granulite sulphides as tracers of lower crustal origin and evolution: An example from the Slave craton, Canada. Geochimica et Cosmochimica Acta, 74 (18) 5368-5381 doi:10.1016/j.gca.2010.06.005 | Journal (article/letter/editorial) | | and evolution: An example from the Slave craton, Canada Sonja Aulbach *, Cristen Krauss, Robert A. Creaser...Sciences, University of Alberta, Edmonton, Alta., Canada Received 12 February 2010; accepted in revised...xenoliths from the Diavik kimberlites in the Lac de Gras area of the central Slave craton were investigated...Ga (Malley-McKay diabase dike swarms), 2.0 (Lac de Gras dike swarm) or 1.3 Ga (Mackenzie dike swarm)...al., 2003b). Inset shows outline of northwestern Canada and Provinces, with the Slave craton highlighted |  | Macrae, Neil D., Armitage, Allan E., Jones, Adrienne L., Miller, Allan R. (1995) A Diamondiferous Lamprophyre Dike, Gibson Lake Area, Northwest Territories. International Geology Review, 37 (3) 212-229 doi:10.1080/00206819509465401 | Journal (article/letter/editorial) | | Diamondiferous Lamprophyre Dike, Gibson Lake Area, Northwest Territories a a a Neil D. Macrae , Allan E. Armitage...N6A, Canada b Geological Survey of Canad , 601 Booth Street, Ottawa, Ontario, Kl A E08, Canada Published...Diamondiferous Lamprophyre Dike, Gibson Lake Area, Northwest Territories, International Geology Review, 37:3, 212-229...Diamondiferous Lamprophyre Dike, Gibson Lake Area, Northwest Territories N E I L D. MACRAE, ALLAN E. ARMITAGE, ADRIENNE...Ontario, London, Ontario, Canada N6A 5B7 AND ALLAN R. MILLER Geological Survey of Canada, 601 Booth Street, |  | Stamm, Natalia, Schmidt, Max W., Szymanowski, Dawid, von Quadt, Albrecht, Mohapi, Thabang, Fourie, Andre (2018) Primary petrology, mineralogy and age of the LetĆĄeng-la-Terae kimberlite (Lesotho, Southern Africa) and parental magmas of Group-I kimberlites. Contributions to Mineralogy and Petrology, 173 (9) doi:10.1007/s00410-018-1502-1 | Journal (article/letter/editorial) | | kimberlite, the Kaapvaal craton and the Canadian Lac de Gras field, respectively, and evaluated their degree...sample from the Jericho kimberlite (Slave craton, Canada) and proposed a primitive Jericho melt based on...Research, University of British Columbia, Vancouver, Canada. Sr and Nd isotopic analyses were conducted using...LetĆĄeng was observed in the Group-I Rich kimberlite, Canada (Roeder and Schulze 2008). (iv) Incompatible element... however, overlap with the range of Group-I Lac de Gras kimberlites (Tappe et al. 2013). Other aspects |  | | Journal (article/letter/editorial) | | University of Alberta, Edmonton AB, Canada BHP Billiton, Yellowknife NT, Canada a r t i c l e i n f o Article...al. / Lithos 126 (2011) 419â434 (Slave craton, Canada), as well as the N contents and aggregation states...mantle. 2. Geology The Slave craton in northwestern Canada consists of two major crustal domains, an ancient...northeast of Yellowknife in the Lac de Gras area of the Northwest Territories, Canada. Kimberlite emplacement...emplacement in the Lac de Gras ïŹeld occurred during Cretaceous to Eocene times (Creaser et al., 2004; Heaman et |  | | Journal (article/letter/editorial) | | Eastern Dharwar Craton. Recently, exploration by De Beers resulted in the discovery of a number of new...kimberlites were discovered in the last decade by the De Beers exploration company in the Narayanpet Kimberlite...Geological Survey of India (~25 pipes) and by the De Beers exploration company (~30 pipes) around the...elements at Activation Laboratories, Ancaster, Canada, by fusion inductively coupled plasma mass spectrometry...calcite are also present in some sections. Secondary titanite, disaggregated quartz and feldspar xenocrysts |  | | Report (issue) | | SURVEY OF CANADA BULLETIN 527 GEOLOGY OF THE KESKARRAH BAY AREA, DISTRICT OF MACKENZIE, NORTHWEST TERRITORIES...in Right of Canada, 1998 Catalogue No. M42-527E lSB 1 0-660-17545-2 ~ Available in Canada fron1 Geological...Geological Survev. of Canada offices: ~ 60 I Booth Stree1 Ottawa. Ontario KIA 0ÂŁ8 3303-33rd Street N. W...for reference in selected public libraries across Canada Price subject to change without notice Cover illustration...Bleeker Author's address Geological Sun ey of Canada 601 Booth Street Ottawa, Ontario 1 KIA OE8 -- |  | | Journal (article/letter/editorial) | | Earth Sciences Building, Edmonton, Alberta T6G 2E3 Canada. *Corresponding author: jingao@cugb.edu.cn Revision...of W, as well as Nb and Ta hosted in rutile and titanite has interesting implications for the budget of...Saglek-Hebron Gneiss Complex of northern Labrador, Canada, and mainly consists of plagioclase, quartz, potassium...gneiss collected from the Acasta Gneiss Complex, Canada, and has been well characterized in terms of its...plagioclase, quartz, hornblende, biotite, magnetite, and titanite, as well as trace garnet, ilmenite, zircon and |  | | Journal (article/letter/editorial) | | its autochthonous cover, southern Slave Province, Canada John W.F. Ketchuma,â , Wouter Bleekerb , Richard...Ontario, Canada M5S 2C6 b Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada K1A 0E8...region of the Archean Slave Province, northwestern Canada. This basement block, the Central Slave Basement...basement-cover contact contains 2942 ± 3 Ma metamorphic titanite which provides a minimum deposition age. This...continental growth. The Archean Slave Province, northern Canada (Fig. 1), is underlain in central and western regions |  | | Journal (article/letter/editorial) | | Division, Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada K1A 0E8 Abstract The global...Scourie dykes in the Lewisian gneiss complex of northwest Scotland (Nain craton; Heaman and Tarney, 1989)...diachronous across the craton from southeast to northwest (Defeat and Concession Suites; Davis and Bleeker...granites, while lower in the section the hornblende â titanite bearing granodiorite of the ca. 2630 Ma Louis...some proposing a date as early as 2.68 Ga (e.g., de Wit et al., 1992 and references therein). This seems |
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