 | | Journal (article/letter/editorial) | | Ferroaugite Syenite from the Coldwell Alkaline Complex, Ontario, Canada 6>-ROGER H. MITCHELL and R. GARTH...Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1 (Received 7 July 1977; in revisedform...liquids are peralkaline and crystallized to aenigmatite and amphiboles which range in composition from...ferrorichterite, ferroactinolite, alkali feldspar, aenigmatite, quartz and zircon. Extreme differentiation of...E R A L GEOLOGY OF THE COLDWELL COMPLEX Tectonic setting The Coldwell complex located on the north shore |  | | Journal (article/letter/editorial) | | Mulanje complex, Malawi R. GARTH PLATY Department of Geology, Lakehead University, Thunder Bay, Ontario...Ontario, Canada AND ALAN R. WOOLLEY Department of Mineralogy, British Museum (Natural History), London, England...distinct complexes the Main complex and the Chambe complex. Each complex is associated with its own trend...trend ofpyroxene evolution. The Main complex pyroxenes exhibit initial enrichment in hedenbergite before...to those of the Main complex. The general evolutionary trend of the Main complex amphiboles is katophorite |  | | Journal (article/letter/editorial) | | of Nepheline Syenites from the Coldwell Alkaline Complex, Ontario, Canada by ROGER H. MITCHELL AND R....Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1 WITH SEVEN PLATES ABSTRACT...natrolite syenites of Center 2 of the Coldwell alkaline complex exhibit rare wispy mafic-rich modal layering...alkali basaltic magmas. INTRODUCTION The Coldwell complex is located on the north shore of Lake Superior...Superior and is the largest alkaline complex in North America. Mitchell & Platt (1977, 1978) have summarized |  | | Journal (article/letter/editorial) | | thermal history of syenites from the Coldwell Complex, Ontario Kim A. Waldron and lan Parsons Department...from augite syenites in the Coldwell Complex (Ontario) reveal a complex set of microtextures that outline...arises because ordered coherent perthites adopt complex twin microtextures and orientations of exsolution...[ ] Gobb~o Fig. 1. Geological map of the Coldwell Complex and vicinity, modified from Mitchell and Platt...our study are from the southeast margin of the complex (boxed area, see Fig. 2). RSFZ, Red Sucker fault |  | | Journal (article/letter/editorial) | | Department o/Geology, Lakehead Ulllverslty, Thunder Bay, Ont P7B 5£1 (Canada) (Received December 19, 1989; accepted...composition of amphiboles may occur in a given complex. A subtrend found only In oversaturated complexes...variation of amphiboles from the Topsalls-St. Lawrence complex (Strong and Taylor, 1984) illustrated III (a) the...MITCHELL (A) RALLIER - DU - BATY (8) FLOWERS BAY Fig. 2. Compositional variation of amphiboles from...Ralher-du Batty (Glret et al., 1980) and (b) Flowers Bay complexes (Collerson. 1982). beekite solid solutions |  | | Journal (article/letter/editorial) | | cryptoperthite, aegirine hedenbergite to (aegirine), aenigmatite, arfvedsonite, ilmenite and magnetite. Geothermometry...such as aegirine-hedenbergite, arfvedsonite and aenigmatite. Considering the comparatively fresh nature of...sodic pyroxene and alkali amphibole (but not aenigmatite) can be found. In general these rocks occur as...rare, but from the Eyjat]allaj~Skull volcanic complex in southern Iceland some xenoliths of quartz-syenite...sodium (sample 60A). (D) Aegirine-hedenbergite, aenigmatite and arfvedsonite-bearing granophyres. The pyroxenes |  | | Journal (article/letter/editorial) | | nepheline syenite (white foyaite) from the Pilanesberg Complex, South Africa Tom Andersen, Marlina Elburg, Muriel...nepheline syenite (white foyaite) from the Pilanesberg Complex, South Africa, Chemical Geology (2016), doi: 10...nepheline syenite (white foyaite) from the Pilanesberg Complex, South Africa Muriel Erambert1 T Tom Andersen1...Abstract MA The Mesoproterozoic Pilanesberg Complex, South Africa, is built up by several distinct...outermost ring in the southwestern part of the complex (“Matooster type TE white foyaite”). In this |  | | Journal (article/letter/editorial) | | Ferromagnesian silicates in a differentiated alkaline complex: Kfingnfit Fjeld, South Greenland D. STEPHENSON...3JW ABSTRACT. Kt~ngmit Fjeld is an intrusive complex resulting from three intrusive events involving...1971). While dominantly syenitic, the alkaline complex exhibits an essentially continuous spectrum of...beneath a cover estimated at 4-5 km thickness. The complex is the westernmost known in the Gardar alkaline...events were involved in the emplacement of the complex (fig. 1): (i) an early western syenite stock intrusion |  | Upton, B. G. J., Macdonald, R., Odling, N., Rämö, O. T., Bagiński, B. (2013) Kûngnât, revisited. A review of five decades of research into an alkaline complex in South Greenland, with new trace-element and Nd isotopic data. Mineralogical Magazine, 77 (4) 523-550 doi:10.1180/minmag.2013.077.4.11 | Journal (article/letter/editorial) | | review of five decades of research into an alkaline complex in South Greenland, with new trace-element and...November 2012; AE: T. Riley] ABSTRACT The Kûngnât Complex (12751.8 Ma) in the Gardar Alkaline Province,...peralkaline granites include the Zomba–Malosa complex, Chilwa alkaline province, Malawi (Woolley and...graben, Norway (Oftedahl, 1978), the Evisa-Calasima complex, Corsica (Bonin, 1988), plutons of the Velasco...ringcomplexes (Bowden et al., 1987) and Center 1, Coldwell Complex, Ontario (Mitchell and Platt, 1978; Platt and Mitchell |  | | Journal (article/letter/editorial) | | similar to that of the neighbouring Ilõ´maussaq complex. Various mineral assemblages were used to reconstruct...nepheline + sodalite + arfvedsonite + aegirine + aenigmatite + astrophyllite indicates lower temperatures...as a small equivalent of the larger Ilõ´maussaq complex, in which identical differentiation processes proceeded...additionally characterized by the occurrence of complex Zr- and Ti-silicate minerals, such as eudialyte...extreme fractionation trend found in the Ilõ´maussaq complex is governed by low water activity, low SiO2 activity |  | | Report (issue) | | Robinson memorial volume: Geological Association of Canada Special Paper 25, p. 149-161. Aitken, J. D., and...the Cordilleran Orogen in Canada: Canada Geological Survey, Geology of Canada, no. 4, p. 97-124. Aitken...1988. Ag-Au-Te mineralization in the Ratagain complex, northwest Scotland: Transactions Institution of...a satellite intrusion of the Palabora igneous complex, South Africa: Economic Geology, v. 81, p. 143-155...Geology of the Field map-area, B. C., and Alberta: Canada Geological Survey Memoir 55, 312 p. Allard, P. |  | | Journal (article/letter/editorial) | | U-Pb zircon age of the Strange Lake peralkaline complex: implications for Mesoproterozoic peralkaline magmatism...A1B 4J6, Canada b Department of Geology, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario, M5S 2C6...2C6, Canada c Geological Survey of Canada, Quebec Geoscience Centre, 2700 Rue Einstein, P.O. Box 7500...7500, Sainte-Foy, Quebec G1V 4C7, Canada Received 20 April 1995; accepted 23 April 1996 Abstract A fine-grained...exotic-poor granite of the Strange Lake peralkaline complex contains zircons that are dated at 1240 + 2 Ma |  | | Book | | ............................ 4 NORTH AMERICA Canada..................................................exploration in particular of Africa, the U.S.S.R., Canada and Brazil, much of it inspired by the search for...Lengai natrocarbonatite volcano and the Ilimaussaq complex, but comparative studies on alkaline rocks have...style adopted for Currie's 'The Alkaline Rocks of Canada' (1976) and the descriptions of carbonatites compiled...pathoidal rocks of the Haliburton-Bancroft area of Canada. Kimberlites are not included, partly because they |  | | Journal (article/letter/editorial) | | in the formation of an alkaline alkaline ring complex. ~ (Received October 22, 1985; accepted September...Upton, 1982; U p t o n et al., 1985), Coldwell Complex, Ontario (Mitchell and Platt, 1982), Morotu, 0024-4937/87/$03...geological map is given in Fig. 1. Within this young complex is developed the Las Cafiadas caldera, a multiple...stratovolcanoes of Teide and Viejo. Lavas of the young complex show the simple evo- An extensive late Quaternary...primocrysts. Textural relationships with amphibole are complex and highly variable (see "Amphiboles" section) |  | Marks, Michael, Vennemann, Torsten, Siebel, Wolfgang, Markl, Gregor (2004) Nd-, O-, and H-isotopic evidence for complex, closed-system fluid evolution of the peralkaline Ilı́maussaq intrusion, south Greenland. Geochimica et Cosmochimica Acta, 68 (16) 3379-3395 doi:10.1016/j.gca.2003.12.008 | Journal (article/letter/editorial) | | 2003.12.008 Nd-, O-, and H-isotopic evidence for complex, closed-system fluid evolution of the peralkaline...indicate a closed system evolution of this igneous complex and support a mantle derivation of the magma. In...on the silica-saturated to oversaturated Puklen complex in the western part of the Gardar Province indicated...of a crustal component for the genesis of this complex (Marks et al., 2003). Nd isotope compositions for...and illustrated enlarged in Figure 2. The Puklen complex is a location referred to in the text. Konnerup-Madsen |  | | Journal (article/letter/editorial) | | 39Ar and U / Pb isotopic study of the Ilı́maussaq complex, South Greenland: Implications for the 40K decay...duration of magmatic activity in a peralkaline complex Thomas V. Krumrei a, Igor M. Villa b,c,*, Michael...duration of the magmatic activity in a specific complex. The Ilı́maussaq intrusion belongs to the second...Introduction The Mesoproterozoic Ilı́maussaq igneous complex is one of ten alkaline intrusive bodies in the...nepheline syenites for peralkaline rocks containing complex Zr–Ti silicates like eudialyte and rinkite, numerous |  | Piilonen, Paula C., McDonald, Andrew M., Poirier, Glenn, Rowe, Ralph, Larsen, Alf Olav (2013) Mafic minerals of the alkaline pegmatites in the Larvik plutonic complex, Oslo rift, southern Norway. The Canadian Mineralogist, 51 (5) 735-770 doi:10.3749/canmin.51.5.735 | Journal (article/letter/editorial) | | THE ALKALINE PEGMATITES IN THE LARVIK PLUTONIC COMPLEX, OSLO RIFT, SOUTHERN NORWAY Paula C. PIILONEN§... P.O. Box 3443, Station D, Ottawa, ON K1P 6P4, Canada Andrew M. MCDONALD Department of Earth Sciences...Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada Glenn POIRIER and Ralph ROWE Research Division... P.O. Box 3443, Station D, Ottawa, ON K1P 6P4, Canada Alf Olav LARSEN Statoil ASA, Research Centre Porsgrunn...plutonic complex, Oslo rift, southern Norway, have been studied to shed light on the complex evolutionary |  | | Book (volume) | | the relative stabilities of minerals in quite complex chemical systems. In geochronology, the K—Ar and...the present volume. Amphiboles are notoriously complex chemically and their nomenclature was the subject...Mineral Sciences; Mineralogical Association of Canada for diagrams from Canadian Mineralogist, Elsevier...American Mineralogist; National Research Council of Canada for diagrams from Canadian Journal of Earth Sciences;...Asbestos Determination (Ed. R. L. Ledoux). Min. Assoc. Canada. 1-34. Whittaker, E. J. W., Cressey, B. A. & Hutchison |  | | Report (volume) | | Geography, University of Alberta. Edmonton, Alberta, Canada. Am. Antiquity- American Antiquity. Society for...Arctic Institute of North America. Montreal, Quebec, Canada, and Washington, D. C. Arctic and Alpine Research-...North America Research Paper. Montreal, Quebec, Canada, and Washington, D. C. Arctic lnst. North America...North America Technical Paper. Montreal, Quebec, Canada, and Washington, D. C. Arizona Acad. Sci. Jour...Resources Annual Report. Victoria, British Columbia, Canada. British Columbia Univ. Dept. Geology Rept. - The |  | | Report (volume) | | be communicated. Frank C. Hawthorne, Winnipeg, Canada Roberta Oberti, Pavia, Italy Giancarlo Della Ventura...University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada frank_hawthorne@umanitoba.ca Roberta Oberti Istituto...O5A O6A O7A O5B O6B O7B O5 O6 O7 * the more complex nomenclature used to describe the positional disorder...the same. ACKNOWLEDGMENTS FCH was supported by a Canada Research Chair in Crystallography and Mineralogy...Natural Sciences and Engineering Research Council of Canada. In addition, much of the work reviewed here was |  | | Book | | impractical to continue adding all the new data to the complex figures, especially of Chapter 14, but all critical.... . . . . . . . . . . . . . 71 73 Chapter 5 Complex Crystal Structures 76 5.1 5.2 76 5.3 5.4 Summary...is impossible to relate structural features of complex substances like feldspar to the Schrodinger wave...spherical One: distorted M-cation positions (b) Complex feldspar structures Orthoclase - a K-rich feldspar...fine-scale intergrowths, and the entropy is a complex function of the order-disorder patterns and of |
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