| | Journal (article/letter/editorial) | origin of marginal rocks from the Muskox layered intrusion (Nunavut, Canada) and implications for the evolution...Columbia, Vancouver, B.C., V6T 1Z4, Canada Anglo American Exploration (Canada) Ltd., 800-700 West Pender Street...Street, Vancouver, B.C., V6C 1G8, Canada a r t i c l e i n f o Article history: Received 19 May 2008...isotopes UāPb geochronology Muskox intrusion Marginal zone Coppermine River ļ¬ood basalts Mackenzie large...province a b s t r a c t The Muskox maļ¬cāultramaļ¬c layered intrusion, Nunavut, is part of the widespread | | | Journal (article/letter/editorial) | Netherlands 38 [2] Mackenzie igneous events, Canada: Middle Proterozoic hotspot magmatism associated...Geoscience Branch, Geological Survey of Canada, Ottawa, Ont. K1A OE4 (Canada) 2 Department of Geology, Royal...Royal Ontario Museum, Toronto, Ont. M5S 2C6 (Canada) Received June 4, 1989; revised version accepted September...1989 U-Pb ages have been obtained for the Muskox intrusion and the Mackenzie dyke swarm. The age of a...a pyroxenite from the layered series of the intrusion is 1270 +_ 4 Ma. Baddeleyite fractions from four | | | 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 | | | Journal (article/letter/editorial) | ~t.jNO t Areas Outcrops of layered series Intrusion b o u n d a r i e s f r o m A e r o m a g n e...grains into elongate single-domain regions by ilmenite exsolution lamellae. Strangway et al. [ 11 ] also...where the magnetite is extensively subdivided by ilmenite lamellae and hence the high coercivity components...formed by subdivision of large magnetite grains by ilmenite exsolution phases. 2. Geology of the Jimberlana...Norite is a large basic ultrabasic dyke-like intrusion, 180 km long and 0 . 5 - 2 . 5 km wide, striking | | | Journal (article/letter/editorial) | Territories Geoscience Ofļ¬ce, Box 1500, Yellowknife, NT, Canada X1A 2R3 Department of Earth Sciences, Carleton...University, 1125 Colonel By Drive, Ottawa, ON, Canada K1S 5B6 c Yale University, 210 Whitney Avenue,...of sills, dykes and lavas distributed over a vast area extending from Wyoming in the south to the Wopmay...Orogen and the Mackenzie Mountains of Northwest Canada. Thick (ā¤100 m) sills and rare dykes in Wopmay...moderately evolved, augite + oligoclaseālabradorite + ilmeniteāmagnetite gabbros and amygdaloidal basalts. Systematic | | | Journal (article/letter/editorial) | Easter I. volcanic complexes and on the Bushveld, Muskox, Kiglapait, Guadalupe, Duluth, Nain, Egersund,...from Mull, Skye, Ardnamurchan and the Skaergaard intrusion are all abnormally depleted in 0 is relative to...pyroxene. The later differentiates of the Muskox intrusion are markedly O~S-rich, but this is not a result...Southern California batholith and in the Skaergaard intrusion, east Greenland, are relatively well understood...Whole rock 6.8 ā¢ 0.2 (2) Clear Lake volcanic area, Lower Lake quadrangle, Cali/ornia. (See A~DERSO~ | | | Journal (article/letter/editorial) | Columbia, 2020-2207 Main Mall, Vancouver, BC V6T-1Z4, Canada 2STEM Fellowship Internship Program, University...University of British Columbia, Vancouver, BC V6T-1Z4, Canada Abstract We present the first systematic characterization...semimassive sulfide samples of nine Ni deposits from Canada, Russia, and Spain (Fig. 3; Table 1; photographs...Columbia, Canada, and Aguablanca, southwest Spain), (2) komatiite-related (Langmuir, Ontario, Canada, and...and Raglan, QuĆ©bec, Canada), (3) anorthosite-related (Voiseyās Bay, Labrador, Canada), (4) flood basalt-related | | | Journal (article/letter/editorial) | units. Applications to the Skaergaard, Bushveld, Muskox, Stillwater, and other intrusions are briefly described...cumulates was the Layered Series of the Skaergaard Intrusion, and the type cumulus mineral was the dominant...conclusions about plagioclase in the Kiglapait Intrusion). For this reason, the concept of cumulates and... b), and in a recent paper on the Skaergaard Intrusion, McBirney & Noyes (1979, p. 503ā4) chose to avoid...olivine, the pyroxenes, chromite, magnetite, and ilmenite (as well as less abundant phases such as apatite | | | 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...separate ilmenite is often considerable; Ade-Hall and Lawley [16] find that separate ilmenite is much...low-Ti titanomagnetite and ilmenite, and progressive oxidation of ilmenite lamellae; the mean class for...covered by ilmenite lamellae; 3, more than 50% of the grain covered by ilmenite lamellae; 4, ilmenite lamellae | | | Journal (article/letter/editorial) | bodiesof ilmenitein chromite in chromititesfrom Dwars River (Fig. l) and from the M unit (Fig. 2) on Winterveld417...tiranium occursin four oxideminerals-rutile,chromite,ilmenite,and an oxide of complexcomposition(Cameron,1978)...oxidationexsolution similar to that proposed as the origin of ilmenite-titanomagnetite intergrowths (Verhoogen, 1962;Buddington...Frischgewoogd 362 KT 33. Kolkfontein 367 KT 34, Dwors River 372 KT 35. Dc Grooteboom 373 KT 36 Rietfontein 375...(1974) reported that in chromite from the Muskox intrusion rutile occurs as inclusionsin chromite, but | | | Journal (article/letter/editorial) | palladium in ultramafic rocks of the Bird River Sill, SE Manitoba, Canada P. Theyer Manitoba Energy and Mines...Mines, 555-330 Graham Avenue, Winnipeg, Manitoba, Canada, R3C 4E3 Received: March 2, 1989/Revisedversion:...portion of the Archean Bird River Sill, a mafic-ultramafic stratiform intrusion in southeastern Manitoba...mechanisms and crystallization histories. The Bird River Sill in southeastern Manitoba is a differentiated...differentiated and layered mafic to ultramafic intrusion. Significant concentrations of chromite, in addition to | | | Journal (article/letter/editorial) | from the Midcontinent Rift-Related Echo Lake Intrusion in Northern Michigan, USA Alexander James Koerber... Abstract: The Echo Lake intrusion in the Upper Peninsula (UP) of Michigan, USA,...Troctolite is the predominant rock unit in the intrusion, with interlayered bands of peridotite, mafic...(PGE)-enriched zone within a 45 m thick magnetite-ilmenite-bearing olivine gabbro unit with grades up to...and studied [3,8,9], which include the Partridge River and South Kawishiwi intrusions, emplaced between | | Fan, Hong-Peng, Zhu, Wei-Guang, Li, Zheng-Xiang, Zhong, Hong, Bai, Zhong-Jie, He, De-Feng, Chen, Cai-Jie, Cao, Chong-Yong (2013) Ca. 1.5Ga mafic magmatism in South China during the break-up of the supercontinent Nuna/Columbia: The Zhuqing FeāTiāV oxide ore-bearing mafic intrusions in western Yangtze Block. Lithos, 168. 85-98 doi:10.1016/j.lithos.2013.02.004 | Journal (article/letter/editorial) | February 2013 Keywords: Mesoproterozoic Maļ¬c intrusion Zircon and baddeleyite geochronology Yangtze Block... 1. a) Simpliļ¬ed tectonic map showing the study area in relation to South China's major tectonic units...Heishan Formation of the Huili Group in the Tong'an area, southwestern China (Fig. 1b). However, neither...between them (Li et al., 2007) (Fig. 1a). The Kangdian area (Fig. 1b) is located near the western margin of...(Fig. 1a). The oldest supracrustal rocks in this area are the late Paleo- to Mesoproterozoic meta-volcanic | | | Journal (article/letter/editorial) | from 14 to 18% over the entire upper zone [9]. Ilmenite and ulvSspinel occur as exsolution products within...within the magnetite grains [8,9], and ilmenite also occurs as discrete, coarse grains. In the sections...sections we have studied, coarse ilmenite comprises 5 - 8 % of the Main Seam and adjacent layers of magnetite...There is little doubt that the fine inclusions of ilmenite within the magnetite grains are products of exsolution...is some debate about the origin of the coarse ilmenite. Molyneux [9] favours the formation of these separate | | | Journal (article/letter/editorial) | may move both as currents along the walls of an intrusion and as globules released from the roof. The feldspar...observaā¢ tions on the Skaergaard intrusion and findings in the Muskox intrusion. It is sugā¢ gested that much...(1939) in their famous study of the Skaergaard intrusion, and it was elaborated by Hess (1960) and by Jackson...seemed most clearly indicated in the Skaergaard intrusion in East Greenland. The problem is that much of...that the iron-rich liquids that developed in the intrusion by that stage would have very high densities. | | | Journal (article/letter/editorial) | āGeochemistry of cumulates from the BjerkreimāSokndal Intrusion (S. Norway). Part I: Constraints from major elements...cumulates from the BjerkreimāSokndal layered intrusion (S. Norway). Part I: Constraints from major elements...phi-C cumulates of the BjerkreimāSokndal layered intrusion. We show the limits of the TiO2/MgO ratio vs....proportions of cumulus minerals (ilmenite and orthopyroxene) in the ilmenite leuconorite mafic pole. We also...shown that the mafic pole is indeed a mixture of ilmenite and orthopyroxene, not induced by āspurious correlationā | | Sandeman, Hamish A., Heaman, Larry M., LeCheminant, Anthony N. (2013) The Paleoproterozoic Kaminak dykes, Hearne craton, western Churchill Province, Nunavut, Canada: Preliminary constraints on their age and petrogenesis. Precambrian Research, 232. 119-139 doi:10.1016/j.precamres.2012.06.002 | Journal (article/letter/editorial) | Hearne craton, western Churchill Province, Nunavut, Canada: Preliminary constraints on their age and petrogenesis...Resources, P.O. Box 8700, St. Johnās, NL, A1B 4J6, Canada Department of Earth and Atmospheric Sciences, University... Alberta, T6G 2E3, Canada 5592 Van Vliet Road, Manotick, Ontario, K4M 1J4, Canada a r t i c l e i n...Hearne craton of the western Churchill Province, Canada, are components of a NeoarcheanāPaleoproterozoic...continental ļ¬ood basalt volcanism (e.g., Columbia River, Deccan, ParanĆ”, Karoo, Siberian trap, Central Atlantic | | | 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) | 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...being made up by cubanite, pyrite, magnetite and ilmenite. In the average Sudbury ore chalcopyrite and pentlandite...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 | | | Journal (article/letter/editorial) | Alberta, 1-26 Earth Sciences Building, Edmonton, AB, Canada, T6G 2E3 Received 30 November 2001; accepted 26...Bear Magmatic Zone, Canada), the 1109 Ma Moore Lakes gabbro (Churchill Province, Canada), the 1269 Ma Muskox...Muskox intrusion (Slave Craton, Canada), the 2060 Ma Phalaborwa carbonatite (S. Africa), and the 2410 Ma...igneous complex (S. Africa) Muskox intrusion (Slave craton) Moore Lakes intrusion (Churchill Province) Faber...the Faber Lake gabbro, a NE-striking sheet-like intrusion in the Great Bear magmatic zone, N.W.T. (GFA92-567) | | | Journal (article/letter/editorial) | 00 Petrology of the Proterozoic Potato River Layered Intrusion, Northern Wisconsin, USA by KENNETH W....DeKalb, Illinois 60115 ABSTRACT The Potato River intrusion is a Keweenawan (1100 Ma) mafic pluton emplaced...rocks of the Picritic zone indicate that the intrusion was open to additional injections of mafic magma...liquids intruded along the upper margin of the intrusion during regional tilting, but Roof zone granitic...aluminous, which suggests that the upper part of the intrusion has been enriched in plagioclase by convection-aided | | Bai, Z.-J., Zhong, H., Naldrett, A. J., Zhu, W.-G., Xu, G.-W. (2012) Whole-Rock and Mineral Composition Constraints on the Genesis of the Giant Hongge Fe-Ti-V Oxide Deposit in the Emeishan Large Igneous Province, Southwest China. Economic Geology, 107 (3) 507-524 doi:10.2113/econgeo.107.3.507 | Journal (article/letter/editorial) | Fe-Ti-V oxide ore deposit is hosted by a layered intrusion located in the central part of the Emeishan large...large igneous province, SW China. The intrusion is relatively small in comparison with other typical oxide-bearing...the ores formed by accumulation of magnetite and ilmenite. As in the nearby coeval Panzhihua Fe-Ti-V oxide...the ferropicritic primary magma of the Hongge intrusion are similar in major and trace element composition...oxide ores and associated rocks in the Hongge intrusion as compared to the coeval high-Ti basalts suggest | | | 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...(An~oAbso to An7Ab93). Oxide inclusions are magnesian ilmenite (up to 37 mol% MgTiO3), rutile, loveringite (Ca...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) | Abstract. The chilled margins of the Michikaman, Muskox, Skaergaard, and Bushveld intrusions were experimentally...Methods Samples of the chilled margins of Michikamau, Muskox, Skaergaard, and Bushveld intrusions were remelted...technique (Eugster and Wones, 1962). Miehikamau Intrusion A drill core s a m p l e (EC66-21Ad, d o n a t...present in the chilled margin of the Michikamau intrusion at ~tmospherie pressure and various ]o~ -10 -8...Brown (196g). MX, sample SDC59-1050D from the Muskox intrusion 25 feet from contact supplied by T.N. Irvine | | Park, Y.-R., Ripley, E. M., Miller, J. D., Li, C., Mariga, J., Shafer, P. (2004) Stable Isotopic Constraints on Fluid-Rock Interaction and Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota. Economic Geology, 99 (2) 325-338 doi:10.2113/gsecongeo.99.2.325 | Journal (article/letter/editorial) | and Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota YOUNG-ROK PARK,* EDWARD M. RIPLEY,ā ...Bloomington Indiana 47405 Abstract The Sonju Lake intrusion, part of the 1.1 Ga Midcontinent rift-related...apatite diorite. Disseminated sulfides in the intrusion have Ī“34S values that range from ā2.2 to 3 per...interval. Ī“18O values of plagioclase from the intrusion range from 5.6 to 12.0 per mil (V-SMOW) and indicate...rocks of the intrusion at temperatures less than ~275Ā°C. Clinopyroxene and Fe-Ti oxides (ilmenite with minor |
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