 | | Journal (article/letter/editorial) | | Peridotite and Pyroxenite Xenoliths from the Jericho Kimberlite: Implications for the Thermal State of the...the Mantle beneath the Slave Craton, Northern Canada M. G. KOPYLOVA1∗, J. K. RUSSELL1 AND H. COOKENBOO2...UNIVERSITY OF BRITISH COLUMBIA, VANCOUVER, B.C., CANADA, V6T 1Z4 2 CANAMERA GEOLOGICAL LTD, 399 MOUNTAIN...MOUNTAIN HIGHWAY, NORTH VANCOUVER, B.C., CANADA, V6B 2M9 RECEIVED NOVEMBER 21, 1997; REVISED TYPESCRIPT ACCEPTED...following types of mantle xenoliths from the Jericho kimberlite in the Slave craton: (1) coarse peridotite; |  | | Journal (article/letter/editorial) | | Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E3 b Division of Earth Sciences, University...diamond productions from Panda (Ekati Mine) and Snap Lake with those from southern Africa shows significant...central and southern Slave (Panda, DO27 and Snap Lake kimberlites) and the Kaapvaal indicates that the...southeast side of Lac de Gras (pipe DO27 of the Tli Kwi Cho kimberlite complex, see Doyle et al., 1999)...inclusions in diamonds from the Snap Lake kimberlite dike (near Camsell Lake, 220 km NE of Yellowknife); no |  | | Journal (article/letter/editorial) | | University, 3450 University Street, Montreal, Quebec, Canada H3A 2A7 Abstract The Earth’s continents are cored...mantle. Low-temperature mantle xenoliths from kimberlite pipes indicate that the shallow parts of these...composition of Fig. 1. Radar mosaic map of northwestern Canada showing the locations of mantle xenolith localities...Cordillera, the Jericho kimberlite pipe in the Slave Province, and the Nikos kimberlite pipe of Somerset...unimodal Cordilleran xenolith suites—black circles, Jericho pipe and Nikos pipes—white triangles. D. Francis |  | | Journal (article/letter/editorial) | | Cr2 O3 þ 3 MgSiO3 ¼ Mg3 Cr2 Si3 O12 eskolaite enstatite knorringite ð2Þ All these previous experimental...of all four phases partaking in the reaction. Enstatite (MgSiO3), magnesiochromite (MgCr 2 O 4 ) and forsterite...contained about 1 wt.% Cr2O3. The Cr content of enstatite does not vary significantly with pressure or temperature...(Mg2SiO4), Sp = magnesiochromite (MgCr2O4), En = enstatite (MgSiO3). All experiments were run with starting...(Mg2SiO4), Sp = magnesiochromite (MgCr2O4), En = enstatite (MgSiO3). Seifert and Ringwood, 1988). The knorringite |  | | Journal (article/letter/editorial) | | clinopyroxene (cpx) inclusions in diamonds from a kimberlite pipe in northeastern China. The observed high mg#...from the “No. 50” kimberlite pipe near Dalian, Liaoning Province, China. The pipe intruded into the Sino-Korean...of the typical Type I kimberlite. The geological settings of this kimberlite pipe and the general features...that the mineral inclusions in diamonds from this pipe are almost exclusively the peridotitic suite, with...cpx inclusions in diamonds from the “No.50” kimberlite pipe, shaded area shows the compositional range |  | | Book | | © 2011 Royal Ontario Museum, Toronto, Ontario, Canada. All rights reserved. No part of this publication...Cataloging-in-Publication Data (U.S.) Library and Archives Canada Cataloguing in Publication Tait, Kimberly. Tait...States by Firefly Books (U.S.) Inc. Published in Canada by Firefly Books Ltd. PO. Box 1338, Ellicott Station...at the Royal Ontario Museum, Toronto, Ontario, Canada. Photography: Brian Boyle, MPA, FPPO, and Miguel...publishing program by the Government of Canada through the Canada Book Fund as administered by the Department |  | | Journal (article/letter/editorial) | | Geophysics, The University of Calgary, Calgary, AB, Canada T2N 1N4 Research Institute for Geochemical Dynamics...University of British Columbia, Vancouver, BC, Canada V6T 1Z4 Received 30 March 2003; received in revised...eclogite xenoliths occur with diamond-bearing kimberlite. The modes and mineral compositions of eclogite...mantle eclogite xenoliths occur in diamond-bearing kimberlite. Eclogite is likely distributed throughout cratonic...Mg-tschermak pyroxene, Fe-tschermak pyroxene, jadeite, enstatite, ferrosilite, forsterite, fayalite, pyrope, almandine |  | Huang, Jin-Xiang, Griffin, William L., Gréau, Yoann, Pearson, Norman J., O'Reilly, Suzanne Y., Cliff, John, Martin, Laure (2014) Unmasking xenolithic eclogites: Progressive metasomatism of a key Roberts Victor sample. Chemical Geology, 364. 56-65 doi:10.1016/j.chemgeo.2013.11.025 | Journal (article/letter/editorial) | | Most eclogite xenoliths from the Roberts Victor kimberlite (South Africa) have been metasomatized by melts/fluids...extensive suite of eclogites from the Roberts Victor kimberlite, South Africa, and found that both stealth and...xenoliths, was brought up to the surface by the kimberlite magma erupted at 128 ± 15 Ma (Smith et al., 1985)...(Ac)–Jadeite (Jd)–CaTsDiopside (Di)–Hedenbergite (Hed)–Enstatite (En)–Ferrosilite (Fs)) are shown in Appendix A-2...mantle beneath Roberts Victor The Roberts Victor kimberlite has become an unofficial “type locality” for xenolithic |  | | Journal (article/letter/editorial) | | (N) and southeastern (SE) Slave craton (northern Canada). The profile transects three depth facies of peridotites...British Columbia, 6339 Stores Road, Vancouver, Canada Introduction Efforts over the past 20 years have...from the drill core of the Jericho and the 5034 (Gahcho Kue cluster) kimberlite pipes. The kimberlites are...Slave Craton (northern Canada, Fig. 1 in Kopylova and Caro 2004). The Jericho pipe was dated as Middle Jurassic...by Rb–Sr and U–Pb geochronology) and the 5034 kimberlite as Middle Cambrian (539±2 Ma by the Rb–Sr method |  | | Journal (article/letter/editorial) | | Columbia, 6339 Stores Rd, Vancouver, BC V6T 1Z4, Canada e-mail: cmiller@eos.ubc.ca J. Ryder Dianor Resources...649 3rd Avenue, 2nd Floor, Val-d’Or, QC J9P 1S7, Canada 150 km by the Jurassic, when the mantle was heated...fluids. Keywords Diamond inclusion Neoarchean kimberlite Southern Superior Tectonic erosion Cratonic...Manitouwadge-Hornepayne; 3 Shebandowan; 4 Winston Lake; 5 Michipicoten. The Wawa metaconglomerate host...(1) Kirkland Lake (Heaman and Kjarsgaard 2000; Heaman et al. 2004) (2) Wawa kimberlite (Kaminsky et al |  | | Book | | org/details/seventhinternati07inte SEVENTH INTERNATIONAL KIMBERLITE CONFERENCE Cape Town, April 1998 EXTENDED ABSTRACTS...Organising Committee of the 7th International Kimberlite Conference takes no responsibility for authors’...omissions. SOUTH AFRICA SEVENTH INTERNATIONAL KIMBERLITE CONFERENCE SPONSORS The 7IKC Organising Committee...recently discovered kimberlites of the Siberian kimberlite province. 9 K - rich clinopyroxenes as mantle...Chromite Macrocrysts and their Inclusions, Guaniamo Kimberlite Field, Venezuela. Primary and related diamond |  | | Journal (article/letter/editorial) | | Geoscience, University of Calgary, Calgary, Alberta, Canada T2N 1N4 a r t i c l e i n f o Article history:...part of the Slave craton and beneath the Kimberley region of the Kaapvaal craton based on known petrologically-observed...the Lac de Gras region of Slave craton (northern Canada) and below the Kimberley region of the Kaapvaal...depletion of this layer. In contrast, the Kimberley region of the Kaapvaal craton exhibits far more uniform...harzburgitic region (Mg# = 92.0) to the less-depleted, more iron rich, lherzolitic region (Mg# = 90.2) |  | | Journal (article/letter/editorial) | | and Geophysics, University of Calgary, Calgary, Canada AB T2N 1N4 b Department of Geology, Dickinson College...Sciences, University of British Columbia, Vancouver, Canada BC V6T 1Z4 Received 4 January 2007; accepted 31...Nisling (Ns), Nisling (Ns), Cassiar terrane (Ca), Lake George assemblage, and Seventymile-Slide Mountain...Devonian and Mississippian augen gneisses of the Lake George assemblage; no granulites have been detected...2). DuselBacon et al., (2002, 2006) interpret the Lake George assemblage as a parautochothonous continental |  | | Journal (article/letter/editorial) | | 70–66 Myr ago. The present‐day heat flux in the region is about 55–60 mW m−2. The position of the Moho...beginning of the continental compression in the region. Citation: Bagdassarov, N., V. Batalev, and V....2005]. Knowledge of the xenolith geotherm in the region is essential for reconstructions of the former...thickening and intracontinental mountain building in the region with higher temperatures on the Moho discontinuity...the MT study along the north‐south profile in the region [Bielinski et al., 2003]. 3. Basalt Sites [7] |  | | Book | | Society (Fig. 2.14), Mineralogical Association of Canada (Fig. 9.23), Mineralogical Society of America (Fig...(Box 2.1). Basalts may contain low-Ca pyroxene – enstatite – as well, but never without high-Ca pyroxene...later chapters. LCP, low-Ca pyroxene, including enstatite and pigeonite (see Box 2.1); plag, plagioclase;...sample consists of 40% augite (SiO2 51.3%), 55% enstatite (SiO2 50.9%) and 5% plagioclase (SiO2 55.1%)....50 mol %) Type minerals • low-Ca pyroxene (enstatite or pigeonite – see Box 2.1); • olivine (see Box |  | | Book | | garnet peridotite xenolith from the Monastery kimberlite in South Africa. Polarizers are only partially...2, France D. Canil University of Victoria, BC, Canada M. J. Drake University of Arizona, Tucson, AZ,...USA R. W. Luth University of Alberta, Edmonton, Canada W. F. McDonough University of Maryland, College...pressure, temperature, and composition of the melting region or magma chamber changes during progressive melting...iron surrounded by a mixed iron—olivine zone. The region overlying the core contained material similar to |  | | Report (volume) | | more than 10,000 prospectors to the semi-desert region, and inevitably led to the recognition of diamond...diamond in their volcanic host rock, dubbed kimberlite (Davies 1984; Hazen 1999). The South African kimberlites’...intrusion in coal/graphite; 2 = meteorite; 3 = kimberlite; 4 = other ultramafic **See Table 3 for locality...analysis shows that ophiolite-hosted Code Locality Canada C1 Jeffrey Mine, Quebec Carbides* 15 Type**...K K, M China C2 Fuxian kimberlite field, Liaoning Prov. C3 Mengyin kimberlite field, Linyi Prefecture |  | | Book | | position of 56Fe; and (iv) the abundance peaks in the region past iron at the neutron closed shell positions...mixing caused by the convection, the entire unstable region evolves essentially chemically homogeneously—replenishing...of burning region (central or shell burning) and depleting the fuel elsewhere in that region at the same...burning of this fuel then commences outside that region. Table 1 summarizes the burning stages and their...maximum temperatures that have been reached in each region in the preceding hydrostatic burning stages (Table |  | | Book | | continental crust, it is useful to begin by defining the region under consideration and to provide some generalities...rocks may not be representative of their source region. These elements include the alkali and alkaline-earth...natural division of the crust into thirds; (ii) the region beneath the upper crust and above a Conrad discontinuity...there is a layer beneath the Conrad; and (iii) the region immediately beneath the Conrad if there are two...Central Slave Province, Canada Host Xenolith types Types of analyses Pipe age Crust age Age References |
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