 | | Journal (article/letter/editorial) | | NorthernIreland Crystallization sequences in the Muskox intrusion and other layered intrusions-II. Origin of...occasions when the basic parental magma of the intrusion is suddenly extensively contaminated with granitic...differentiation patterns of Cr and Wi in the Muskox intrusion. The granitic melt is produced because most...most of the crystals formed in the intrusion accumulate on its floor, leaving the roof rocks to be continuously...density and high viscosity. granophyre. In the Muskox intrusion there are two chromite-rich layers, each occurring |  | Schwab, Danette L, Thorkelson, Derek J, Mortensen, James K, Creaser, Robert A, Abbott, J.Grant (2004) The Bear River dykes (1265–1269 Ma): westward continuation of the Mackenzie dyke swarm into Yukon, Canada. Precambrian Research, 133 (3) 175-186 doi:10.1016/j.precamres.2004.04.004 | Journal (article/letter/editorial) | | Precambrian Research 133 (2004) 175–186 The Bear River dykes (1265–1269 Ma): westward continuation of the...the Mackenzie dyke swarm into Yukon, Canada Danette L. Schwab a,∗ , Derek J. Thorkelson a , James K....Sciences, Simon Fraser University, Burnaby, BC, Canada V5A 1S6 Department of Earth and Ocean Sciences...University of British Columbia, Vancouver, BC, Canada V6T 2B4 c Department of Earth and Atmospheric Sciences...Edmonton, Alta., Canada, T6G 2E3 d Yukon Geology Program, Whitehorse, Yukon, Canada Y1A 2C6 b Received |  | | Journal (article/letter/editorial) | | EasternBushveld Complexare chromite,the most abundant,and rutile, widelydistributedas an accessory mineral.Ilmeniteand...chromitites apparently formedduringthe postcumulus stage. Rutile and chromitewereevidentlystableas coexistingphasesduring...bodiesof ilmenitein chromite in chromititesfrom Dwars River (Fig. l) and from the M unit (Fig. 2) on Winterveld417...Winterveld417 KS, and tiny irregulargrainsof rutile alonggrain boundaries of chromite.Cameron and Emerson(1959)...of rutilein certainchromitites, (1962) reported rutile as an accessory and Guilbert mineral(traceamountsto |  | Thorkelson, Derek J, Mortensen, James K, Davidson, Garry J, Creaser, Robert A, Perez, Waldo A, Abbott, J.Grant (2001) Early Mesoproterozoic intrusive breccias in Yukon, Canada: the role of hydrothermal systems in reconstructions of North America and Australia. Precambrian Research, 111 (1) 31-55 doi:10.1016/s0301-9268(01)00155-3 | Journal (article/letter/editorial) | | Early Mesoproterozoic intrusive breccias in Yukon, Canada: the role of hydrothermal systems in reconstructions...BC, Canada V5A 1S6 Earth and Ocean Sciences, Uni6ersity of British Columbia, Vancou6er, BC, Canada V6T...Edmonton, Alta., Canada, T6G 2E3 e Yukon Geology Program, Whitehorse, Yukon, Canada, Y1A 2C6 b Received...accepted 24 January 2000 Abstract In northern Yukon, Canada, numerous breccia zones of early Mesoproterozoic...dioritic to syenitic rocks of the Bonnet Plume River intrusions. In the central parts of the breccia |  | | Journal (article/letter/editorial) | | Formation), nearly contemporary with, or followed by, intrusion of major alkaline igneous bodies, syenite and...Gardar diatremes in and around the Tugtut0q-Narssaq area and within the central Tugtut0q alkaline complex...aggregate of titanohematite, pseudobrookite and ferri-rutile. The salient petrologic properties are listed in...and ferri-rutile can be produced by both processes. Granulation, the development of ferri-rutile granules...and is given by ]gn 6 = 1 (Mox - n) × area o f n/~ 6 = 1 area. V o l u m e s are given as percentages |  | Reid, K. D., Ansdell, K., Jiricka, D., Witt, G., Card, C. (2014) Regional Setting, Geology, and Paragenesis of the Centennial Unconformity-Related Uranium Deposit, Athabasca Basin, Saskatchewan, Canada. Economic Geology, 109 (3) 539-566 doi:10.2113/econgeo.109.3.539 | Journal (article/letter/editorial) | | Uranium Deposit, Athabasca Basin, Saskatchewan, Canada Kyle D. Reid,1,† Kevin Ansdell,1 Dan Jiricka,2...Saskatchewan, 114 Science Place, Saskatoon, SK, Canada S7N 5E2, 2 Cameco 3 Saskatchewan Corporation...Corporation, 2121-11th Street West, Saskatoon, SK, Canada S7M 1J3 Geological Survey, Ministry of the Economy, Government...Saskatchewan, 200-2101 Scarth Street, Regina, SK, Canada S4P 2H9 Abstract The Centennial unconformity-related...uncertain age. Virgin Schist Group rocks in the deposit area include phyllites, impure quartzite, and quartzite |  | | Journal (article/letter/editorial) | | fractionation representedin the Lower Zone of the Olifants River trough and is not the product of a separate, later...256 KT, Mooi- Complexextendsfrom the Olifants River to the hoek 255 KT, Onverwacht292 KT, and Zeekoegat...Rietfontem Richmond 38. Thorncliffe 39. Helena River KT 372 KT 373 375 KT 370 KT 374 KT C:•JT...sectorof the Eastern BushveldComplex (Fig. 1), the area discussedin the presentpaper. Hall describedrock...the generalgeol- Smith (1967, 1969) for the Muskox intrusion, was ogy of the Critical Zone in the northernpart |  | | Journal (article/letter/editorial) | | recrystallization in the Western Laouni mafic intrusion, Algeria J.P. Lorand a and J.Y. Cottin 2 1 Laboratoire...olivine orthocumulates from the Western Laouni intrusion (Southern Hoggar, Algeria) contains inclusions...are magnesian ilmenite (up to 37 mol% MgTiO3), rutile, loveringite (Ca,REE(Ti,Fe, Cr,Mg,Zr)21038) and...igneous complexes of continental area (Bushveld, South Africa; Muskox, Canada and Stillwater, USA). In the...Bushveld complex is included in chromite from the Muskox intrusion (Irvine 1975), while phlogopite inclusions |  | | Journal (article/letter/editorial) | | Qingxudong formation, enriched and mineralized in the ore area. Acknowledgement This work was jointly by the National...ru) The location Veseloe of carbonatite-bearing area of Northern Transbaikalia is located in a frame...Magnesioriebeckite, richterite, calcite, magnetite, rutile, zircon, fluorophlogopite are typical minor minerals...dissemination and line segregation of magnetite and rutile, focused according to layering of rocks. Magnetite...contains lenticular and myrmekitic inclusions of rutile. М1 is characterized by the contents TiO2 up to |  | | Journal (article/letter/editorial) | | gabbrosampleand•3 to 81 ppb in the other 29 samAlong the Indus River valley, the Main Mantle pies,which are mostlychromitites...(Jan,1988). out over an area of about 10,000 km2 and are the In the Indus River valley, the uppermostof...inferred cumulus arrival arrival ß Jijal village • river .------. stream •. igneous layering igneousfoliation...relict igneousmodal layering.The top of the third intrusion,the Patan Complex(Fig. 1), is a spectacular,intrusive...mentsover the interhornblendeand lesserquartz, rutile, and ilmenite) val 9 to 15 kbars.For Jijalrocks |  | | Journal (article/letter/editorial) | | Geoscience Studies, Carleton University, Ottawa, Canada Platinum-Group Minerals and Other Solid Inclusions...plotted on Fig. 3. Laurite analyses from the Bird River Sill, Manitoba, Stillwater Complex, and Big Trout...examined, but they have been identified from the Bird River Sill. According to the classification of Harris...Montana, ~ Crystal Lake Gabbro, Ontario, 9 Bird River Sill, Manitoba, | Bushveld Complex, South Africa...Montana, -~g Big Trout Lake Complex, Ontario, 9 Bird River Sill, Manitoba usually magnesium-, nickel- and |  | | Book | | conference proceedings. It covers the entire research area of geology including, but not limited to, economic...the layered intrusions scene is the Panzhihua intrusion (SW China) that has been intensively studied recently...of Major Layered Intrusions 10 The Panzhihua Intrusion, SW China ����������������������������������������������������...435 11 The Sept Iles Intrusive Suite, Quebec, Canada ������������������������������������ Olivier...���� R. Grant Cawthorn 517 13 Kiglapait Intrusion, Labrador ���������������������������������� |  | Charlier, Bernard, Namur, Olivier, Malpas, Simon, de Marneffe, Cédric, Duchesne, Jean-Clair, Auwera, Jacqueline Vander, Bolle, Olivier (2010) Origin of the giant Allard Lake ilmenite ore deposit (Canada) by fractional crystallization, multiple magma pulses and mixing. Lithos, 117 (1) 119-134 doi:10.1016/j.lithos.2010.02.009 | Journal (article/letter/editorial) | | of the giant Allard Lake ilmenite ore deposit (Canada) by fractional crystallization, multiple magma...hemo-ilmenite. The main ore body is a funnel-shaped intrusion, measuring 1.03 × 1.10 km and 100–300 m-thick...67°W) was discovered in June 1946 in the Allard Lake area near a small lake named Lac Tio during the first...the Allard Lake deposit and the Grader layered intrusion and geochronological data. (1) van Breemen and...Charlier et al., 2007) and the Grader layered intrusion (Canada; Charlier et al., 2008) to explain the discrepancy |  | | Report (volume) | | Complex is a layered mafic-ultramafic igneous intrusion that is exposed for about 40 km along the northern...MONTANA ... .0 Livmgstonu 109°45' Billings H Map area 45°30' 45°25' EXPLANATION Sedimentary rocks (Mesozoic...Co. drill core M-16, from the Mountain View E2 area of the complex (fig. IB). The Mountain View block...mixing of new batches of magma. In the Mountain View area, where the Peridotite zone reaches its greatest...McCallum (1984) showed 20 cyclic units in the same area. Chromite seams occur within the olivine cumulates |  | | Journal (article/letter/editorial) | | igneous complexes, mostly in those of the layered intrusion-type. In addition, stratiform bodies of base metal...intrusions". Igneous complexes of the layered intrusion-type are - - because of their often formidable...accumulations in other layered intrusions (e. g., Muskox, Canada; Stfllwater, Montana; Bushveld, South Africa)...Quebec: KIL~URNet al., 1969), the Kambalda-Kalgoorlie area, Western Australia (McCALL, 1972), and the Empress...and dunites (el. Gonads, 1967). Dunites from the Muskox layered series yielded, for instance, Ni-values |  | | Book | | A. T. N. IRVINE, Geological Survey of Canada, Ottawa, Canada E. D. JACKSON, U.S. Geological Survey,...S.A. C. H. SMITH, Geological Survey of Canada, Ottawa, Canada Contributors vi H. SORENSEN, Universitetets...Bhattacharji, Geological Survey of Canada, and the National Research Council of Canada. T. N. Irvine: J. A. Noble...The ultramafic rocks of the Muskox intrusion, Northwest Territories, Canada By T. N. Irvine and C. H. Smrru...dunite Structures in the dunite Serpentinization Intrusion of the dunite mass > QAmMOOW Conclusions 160 |  | | Journal (article/letter/editorial) | | possible octahedral aluminum in (Leake) Anatase and rutile determination in soils and sedirnents (Ra- 465...Carbonatites and alkalic rocks of the Arkansas River Area, Fremont Countyr Colorado. 2. Fetid gas from...f t h e p r e c a m Denver brian, Mountarn Parks area, Colorado (abs.). 280 Borcarite (Pertzev, Ostravskaya...Carbonatites and alkalic rocks of the Arkansas River Area, Fremont County, Colorado. 2. Fetid gas from...Delabio' R. N. Mackinawite and valleriite in the Muskox intruslon. . Chao, C. 682 519 INDEX 7-O VOLUME |  | | Journal (article/letter/editorial) | | and dunite-peridotites from the Nordfjord-Molde area, west Norway were analysed for La, Ce, Nd, Sm, Eu...with about 40% garnet, 60% omphacite and minor rutile, quartz, amphibole and phengitic mica. Sample 3/70...with 65% garnet, 27% clinopyroxene and 8% quartz. Rutile, apatite and ore are found as accessories. Sample...remaining 10% is made up of quartz, amphibole, rutile, biotite and carbonate. Sample 1 7/70 is a metaeclogite...altered to hornblende kelyphite. Besides primary rutile and quartz there is secondary biotite, green spinel |  | | Journal (article/letter/editorial) | | peaks of metamorphism ComIgneous Bushveld the of intrusion the and volcanism Ventersdorp reclosely which...to have been formed from allogenic uraninite and rutile (Ramdohr, 1957). Due to this "pseudohydrothermal"...ar:ro (1965) Mackinawite and valleriite in the Muskox intrusion. Am. Mineral.sO, 682 695. Devrosom, c. F. |  | Rajesh, H.M., Chisonga, B.C., Shindo, K., Beukes, N.J., Armstrong, R.A. (2013) Petrographic, geochemical and SHRIMP U–Pb titanite age characterization of the Thabazimbi mafic sills: Extended time frame and a unifying petrogenetic model for the Bushveld Large Igneous Province. Precambrian Research, 230. 79-102 doi:10.1016/j.precamres.2013.02.002 | Journal (article/letter/editorial) | | LIP in northern Canada includes the giant Mackenzie dyke swarm, the Coppermine River flood basalts and...and the Muskox mafic to ultramafic layered intrusion, which becomes progressively more silicic toward the...a prominent sheet of granophyres capping the intrusion (Irvine, 1980; Dostal et al., 1983; LeCheminant...With the world’s largest layered ultramafic-mafic intrusion (Bushveld Complex), associated with basalt-rhyolite...sills which underlie the Bushveld Complex layered intrusion and intrusive into the country rock sediments |  | Seat, Z., Mary Gee, M. A., Grguric, B. A., Beresford, S. W., Grassineau, N. V. (2011) The Nebo-Babel Ni-Cu-PGE Sulfide Deposit (West Musgrave, Australia): Pt. 1. U/Pb Zircon Ages, Whole-Rock and Mineral Chemistry, and O-Sr-Nd Isotope Compositions of the Intrusion, with Constraints on Petrogenesis. Economic Geology, 106 (4) 527-556 doi:10.2113/econgeo.106.4.527 | Journal (article/letter/editorial) | | Chemistry, and O-Sr-Nd Isotope Compositions of the Intrusion, with Constraints on Petrogenesis ZORAN SEAT,†...0EX, United Kingdom Abstract The Nebo-Babel intrusion, which hosts a world-class magmatic Ni-Cu-PGE...chemical, and isotopic data from the Nebo-Babel intrusion indicate that all of the lithostratigraphic units...units are cogenetic and that the intrusion is the product of three temporally distinct magma pulses. The...pulse, which formed the marginal units of the intrusion, was the most primitive and has assimilated the |  | Beyer, Christopher, Rosenthal, Anja, Myhill, Robert, Crichton, Wilson A., Yu, Tony, Wang, Yanbin, Frost, Daniel J. (2018) An internally consistent pressure calibration of geobarometers applicable to the Earth’s upper mantle using in situ XRD. Geochimica et Cosmochimica Acta, 222. 421-435 doi:10.1016/j.gca.2017.10.031 | Journal (article/letter/editorial) | | Mn, MnTiO3/rutile; Fe, Fe-metal/almandine; Cr, Cr-metal; Al, jadeite/pyrope; Ti, rutile; Si, diopside/pyrope)...xenoliths of the Jericho kimberlite, Slave craton, Canada. Temperature was calculated with the BKN90 geothermometer...and eclogites, support previous findings that the area around the Jericho kimberlite was exposed to an...preliminary value of heat flow at the Muskox Intrusion near Coppermine, NWT, Canada. Earth Planet. Sci. Lett. 1...and eclogites of the Jericho kimberlite (Northern Canada). Contrib. Mineral. Petrol. 158, 295–315. https://doi |  | Li, Chusi, Ripley, Edward M., Sarkar, Arindam, Shin, Dongbok, Maier, Wolfgang D. (2005) Origin of phlogopite-orthopyroxene inclusions in chromites from the Merensky Reef of the Bushveld Complex, South Africa. Contributions to Mineralogy and Petrology, 150 (1) 119-130 doi:10.1007/s00410-005-0013-z | Journal (article/letter/editorial) | | and quartz are less abundant. Cl-rich apatite, rutile, zircon and chalcopyrite are present at trace levels...Québec à Chicoutimi, Chicoutimi, G7H 2B1 Québec, Canada value of the trapped melt, estimated by analysis...dissolution of the host chromite. Dissolution of minor rutile trapped along with orthopyroxene provided most...mafic-ultramafic intrusion situated in northern South Africa with a surface exposure over an area of 240·350...composite mineral inclusions, (2) minor solitary rutile inclusions and (3) rare solitary plagioclase inclusions |  | | Journal (article/letter/editorial) | | Montana ROBERT W. BARKER Abstract The Stillwater Intrusion in Montana is a large Precambrian elongate and...rubidium can be detectednear the contact of the intrusion. However, there.is no evidenceof a metasomaticintroductionof...Rb20. Sulfidesin the gabbroicbasal zone of the intrusion were formed very late, after some of the mafic...and in the ultramafic zone of the Stillwater Intrusion. Introduction sulfide-enriched areasis a great...hornfels inclusions in the basal zone of the intrusion. THE StillwaterIntrusion (Fig. 1) is a large |  | | Journal (article/letter/editorial) | | the uppermost mantle beneath this area. This in turn means that the area is not magma starved, although...the MAR in the area suggests that it is a typical slow spreading mid ocean ridge. This area was thought...show the backscatter image. A few small grains of rutile were found in the spinel grains of the 1271A chromitite...(Sample 209-1271A-4R-2, Piece 2, 44-47 cm). (b) Small rutile grains included in chromitite (Sample 209-1271A-4R-2...the uppermost mantle beneath the examined area despite the area being considered “magma starved.” The melt |
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