 | | Journal (article/letter/editorial) | | here for constituent minerals from the Oka carbonatite complex, which is associated with the Cretaceous...contamination during the petrogenetic history of the Oka complex. Instead, the isotopic variations reported here... 1994). The Cretaceous Oka carbonatite complex within southern QuĂ©bec (Canada) contains both carbonatite...associated alkaline silicate rocks (e.g., alnoite, ijolite), and is the most westerly alkaline intrusive center...reveal that the magmatic activity (maximum extent) at Oka was a prolonged event, which occurred between 109 |  | | Journal (article/letter/editorial) | | Multi-Stage Petrogenetic History of the Oka Carbonatite Complex (QuĂ©bec, Canada) as Recorded by Perovskite and...2014 / Published: 26 May 2014 Abstract: The Oka complex is amongst the youngest carbonatite occurrences...the Monteregian Igneous Province (MIP; QuĂ©bec, Canada). The complex consists of both carbonatite and undersaturated...undersaturated silicate rocks (e.g., ijolite, alnöite), and their relative emplacement history is uncertain...study is to decipher the petrogenetic history of Oka via the compositional, isotopic and geochronological |  | | Journal (article/letter/editorial) | | by LA-ICP-MS: An example from the Oka carbonatite, Quebec, Canada Richard A. Cox a,â, Derek H.C. Wilton...UniversitĂ© du QuĂ©bec a Chicoutimi, Dept. des Sciences Appliquees, Chicoutimi, QC, Canada, G7H 2B1 Memorial... Department of Earth Sciences, St. John's, NL, Canada, A1B 3X5 Received 22 July 2004; received in revised...single perovskite crystals from the Oka carbonatite complex, Quebec, Canada. The weighted mean 206 Pb/238U...large perovskite crystals from the Oka carbonatite, near Montreal, Canada in order to test the effectiveness |  | | Journal (article/letter/editorial) | | Volume 70, pages 1l0l-l l l3, 1985 The Oka carbonatite complex, Quebec: geology and evidencefor silicate-carbonate...the northern intrusive center of the Oka complex (Quebec,Canada) probably formed from immiscible carbonate...charges or volcanic rocks. The Oka pluton, a Cretaceous intrusive complex of the Monteregian Hills petrographic...between silicate and carbonate magmas was important at Oka, but these studies did not specifically state which...paper evaluates liquid immiscibility in the Oka complex using all pertinent field, petrographic and chemical |  | | Journal (article/letter/editorial) | | yttrium in the rocks and minerals of the Oka carbonatite complex, Quebec G. NELSON EBY Department of Environmental...(14) and mineral (87) samples from the Oka carbonatite complex. Whole-rock and mineral data indicate a...mineral pairs are quite variable, indicating that the Oka rocks were emplaced through a wide-range of physicochemical...conditions. A reasonable model for the origin of the complex involves a limited partial melting of mantle material...resulting in a residual liquid which produced ijolite and subsequently okaite, and crystallization of |  | | Journal (article/letter/editorial) | | UâPb ages of apatite from the Oka carbonatite complex: Insights into a complex crystallization history Wei...Keywords: Apatite Calcite Geochronology Carbonatite Oka Laser ablation a b s t r a c t This study reports...associated okaites and ijolites from the Oka carbonatite complex (Canada). Both apatite and calcite are rare...present within individual samples. Apatite from one ijolite deïŹnes two distinct ages; an older age of 127±...associated okaites and ijolites at the Oka carbonatite complex. The combined large variations in major |  | | Journal (article/letter/editorial) | | 819-825, 1973 ScandiumGeochemistry of the Oka Garbonatite Complex,Oka,Quebec G. NelsoN Env Department of Biological...samples) and minerals (84 samples) from the Oka carbonatite complex, Oka, Quebec' Whole-rock data indicate a...equilibrium was not attained by the Oka rocks. The silicate rocks of the complex crystallized from a differentiating...selectivepartitioning of scandium, possibly in the form of complex ions, into the volatilerich phase may account for...scandium in the rocks and minerals of a carbonatite complex (Heinrich, 1966, p. 242). This paper presentsthe |  | | Journal (article/letter/editorial) | | Earth Element Geochemistry of the Fen Alkaline Complex, Norway Roger H. Mitchell* and Arild O. Brunfelt...element (REE) abundances in rocks of the Fen complex has shown that within rocks of the first magmatic...series REE abundances increase in the order urtite<ijolite...and melteigites. Similar La/Yb ratios (40-60) in ijolite, tinguaite and sovite indicate that the sovites...and volatile transport. Introduction The Fen complex ofcarbonatites and alkaline rocks intrudes Precambrian |  | | Journal (article/letter/editorial) | | oxygen ~topic ~rn~~on of ~~~at~ the Oka Carbonatite complex, Quebec, Canada PETER from DEINES Department...awepted ira re~~sea~o~ 5 Jum 1970) Abstract-X%e Oka complex is a carbonatite belonging to the alkaline intrusive...oxygen isotopic composition of carbonates from this complex were studied and found to vary by 7 x0 for carbon...exist in cross sections through the carbonetite complex. INTRODUCTION A NUMBER of au&hors have published...fifty carbonatite rook samples from the Oka carbonatite complex were analyzed for the carbon and oxygen |  | | Journal (article/letter/editorial) | | district, California; Oka, Quebec, 1980) andmanyothersundoubtablyremainto be dis- Canada;Iron Hill, Powderhorn...HOH-bending vibration district,Colorado;O -- Oka Carbonatite,Quebec,Canada. mode,coupledwith the OH-stretchingmotion...ywere obtainedfrom publishedreports.Five of the Oka, Quebec,samples were analyzedindependentlyfor rare...Biotite, microcline,hornblende} augRe,rutlie Oka Complex,Quebec (Gold, 1969, p. 49-50; Gold andVallee...apatite Wollastonite Wollastonite, melanite, ijolite, magnetite, apatite Na pyroxenesovite (2) Calcite |  | MĂ©jean, Pauline, Pinti, Daniele L., Kagoshima, Takanori, Roulleau, Emilie, Demarets, Laura, Poirier, AndrĂ©, Takahata, Naoto, Sano, Yuji, Larocque, Marie (2020) Mantle helium in Southern Quebec groundwater: A possible fossil record of the New England hotspot. Earth and Planetary Science Letters, 545. 116352pp. doi:10.1016/j.epsl.2020.116352 | Journal (article/letter/editorial) | | UniversitĂ© du QuĂ©bec Ă MontrĂ©al, CP888, Succ. Centre-Ville, MontrĂ©al, QC, H3C 3P8, Canada c Atmosphere...UniversitĂ© de Sherbrooke, Longueuil, QC, J4K 0A8, Canada b a r t i c l e i n f o Article history: Received...age located in the St. Lawrence Lowlands, Quebec, Canada. Their origin is controversial and numerous studies...across the St. Lawrence Lowlands, Quebec, Eastern Canada (Fig. 1 and 2b). The magmatic source of these intrusions...located west of Montreal, close to the Oka carbonatite complex (Fig. 2a). The second set of helium P |  | | Report (issue) | | Sulphur Springs complex...................................... 7 V-intrusive complex................................................ 7 Magnet Cove complex..................................................- Generalized geologic map of the Magnet Cove complex.......... 8 Tables Table 1. - Analytical data...million years after the silicate rocks of the complex. Petrogenetic models for Magnet Cove should consider...from this study. The ages for the Prairie Creek complex are from Zartman and others (1967). The dashed |  | | Journal (article/letter/editorial) | | Department of Geology, Carleton University, Ottawa, Canada, and Department of Geophysical Sciences, University...on the basis of field evidence. Studies in more complex systems were undertaken to ascertain the relationship...general and in the Oka, Quebec, complex in particular. The succession of assemblages at Oka and at other melilite...this phase and that of cancrinite may be more complex than the commonly assumed 3:1 double-salt formula...CaCO3-Ca(OH)2-H2O (Watkinson, 1965, 1970) because of complex breakdown reactions of melilite. Nepheline. Nepheline |  | | Journal (article/letter/editorial) | | Springer-Verlag 1987 Nd and Sr isotope systematics of the Oka complex, Quebec, and their bearing on the evolution of... Carleton University, Ottawa, Ontario K1S 5B6, Canada Abstract. A detailed isotopic study of minerals...and whole rocks from the Cretaceous Oka complex, Quebec, Canada, shows a very small variation in initial...compositions. Assuming an age of 109 M a for the complex, apatite, calcite, garnet, melilite, monticellite...depleted in the L I L elements. The new data from Oka suggest that the depleted source may have remained |  | | Journal (article/letter/editorial) | | and syenite ring dike system, in the Gardiner complex, East Greenland T. F. D. NIELSEN LITHOS Nielsen...and syenite ring dike system, in the Gardiner complex, East Greenland. Lithos 13, 181-197. Oslo. ISSN...are: a) undersaturated locks of the melteigite-ijolite-urtite/nepheline syenite suite, b) melanite-caltcite...and concluded that the melilitolites of the Oka Complex (Gold 1966) were formed by fractional crystaUization... Melilitolites occur in the Tertiary Gardiner complex, East Greenland, Frisch & Keusen 0977) where the |  | | Journal (article/letter/editorial) | | complexes Rock Kovdor, Kola peninsula, Russia Turjaite Ijolite Calcite carbonatite Calcite carbonatite Calcite...7039 0.7036 Nielsen and Buchardt, 1985 Oka, Quebeck, Canada Calcite carbonatite Calcite carbonatite...carbonatites, particularly, in the carbonatites of the Oka complex. Phase relations on the section calcite â portlandite...calcite carbonatite, Oka complex; (b) pyrochlore, calcite carbonatite, Ozernyi complex; (c) baddeleyite,...phoscorite, Kovdor complex; (d) burbankite, dolomite â calcite carbonatite, Vuori-Yarvi complex; (e) strontianite |  | | Journal (article/letter/editorial) | | have been compiled in Fig. 1. The data for the Oka carbonatite (DEINES, 1970a) were not included, since...the large number of analyses available for this complex would have completely dominated the distribution...calcite with accessory minerals) from the same complex (DEIXES, 1970%). However, the question arises whether...observed in Fig. 1. There is only one carbonatite (Oka) for which one can state the average carbon isotopic...that all three means differ from the mean of the Oka csrbonatite at the one per cent level of significance |  | | Journal (article/letter/editorial) | | nephelinitic and are jacupirangite, pyroxenite, ijolite, nepheline syenite and wol- phonolitic tuffs and...SETTING OF injected sub-volcanic complex. THE PLUTONIC IGNEOUS Complex zoning of phases and mineral disequilibrium...slopes of the volcano (Dawson, KEY WORD& xenoliths; ijolite; jacupirangite; nepheline syenite 1989). Stratigraphically...carbonatite lavas and ash (Dawson et al., enite, ijolite, nepheline syenite and wollastonitite. âąCorresponding...Within the pyroclastic succession, pyroxenite, ijolite and nepheline syenite blocks occur in both Unit |  | | Journal (article/letter/editorial) | | periclase-dolomite-calcite carbonatite from the Oka complex, Quebec, and its calculated volatile composition*...alabandite in a carbonatite dike within the Oka complex, Quebec, buffers the fugacities (and partial...unusual carbonatite dike on Husereau Hill in the Oka complex (Gold 1967, 1972) provides a unique opportunity...the Oka alkaline complex, a Cretaceous pluton which also includes a concentrically layered ijolite-carbonatite...be among the youngest units of the complex, intruding the ijolite-carbonatite suite. The sample studied |  | | Journal (article/letter/editorial) | | and other minerals from an ijolite of the Seabrook Lake carbonatite complex. Those results may be compared...greater (494 cf. 147) than in the apatite from the ijolite. The La content of the EG 2857 sphene is only about...sphene of the ijolite and the (La/Lu)c Nis similar. Unlike the sphene from the ijolite, that from Kangerdlugssuaq...Sphene/apatite Sphene/biotite Ijolite 19 ka EG 2857 D D a'b Ijolite 19 EG 4583 k Ijotite 19 k" ...a biotite-rich, apatite bearing rock of the Oka complex (Eby 1975). Partition coefficients (k, concentration |  | Duke, Genet Ide, Carlson, Richard W., Frost, Carol D., Hearn, B.C., Eby, G. Nelson (2014) Continent-scale linearity of kimberliteâcarbonatite magmatism, mid-continent North America. Earth and Planetary Science Letters, 403. 1-14 doi:10.1016/j.epsl.2014.06.023 | Journal (article/letter/editorial) | | Mountains of the east coast, which include the Montreal Oka carbonatite, Monteregian Hills, and White Mountain...series, and NES/OK are New England Seamount and Oka carbonatite samples. All G1, G2, and G3 sample locations...other; see text), and AC (Arkansas carbonatite and ijolite, and others; see text). Great Plains alkalic province...series, and NES/OK are New England Seamount and Oka carbonatite samples. All G1, G2, and G3 sample locations...references are given in Duke (2009). WM, NES, and OKA data are from Chen et al. (1994), Dorais et al. (2005) |  | | Journal (article/letter/editorial) | | BC, Canada; bSchool of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada; Natural...Natural Resources Canada NRCan, Geological Survey of Canada, Sidney, BC, Canada ABSTRACT ARTICLE HISTORY...geological work at the Alnö Island alkaline-carbonatite complex in 1889. The history of carbonatite research up...charge for download from the Geological Survey of Canada website. The highly descriptive and factual nature...Survey, PO Box 933 Stn Prov Govt, Victoria, BC, Canada V8W 9N3; School of Earth and Ocean Sciences, University |  | | Journal (article/letter/editorial) | | and trace element measurements. The Ice River Complex is a late Paleozoic alkaline intrusion consisting...southeastern British Columbia, Canada (Bowers & Rowan, 1996). It also contains an ijolite unit, a coarse-grained...reference perovskite with apatite (Ap) inclusion; (H) Oka reference perovskite with calcite (Ca) inclusions...euhedral perovskite crystal extracted from the ijolite unit (Heaman, 2009; Tappe & Simonetti, 2012). Other...perovskite (17â21 wt% Nb2O5) from the Oka carbonatite complex, Quebec, Canada (Cox & Wilton, 2006). Previous |  | Doroshkevich, Anna G., Veksler, Ilya V., Klemd, Reiner, Khromova, Elena A., Izbrodin, Ivan A. (2017) Trace-element composition of minerals and rocks in the Belaya Zima carbonatite complex (Russia): Implications for the mechanisms of magma evolution and carbonatite formation. Lithos, 284. 91-108 doi:10.1016/j.lithos.2017.04.003 | Journal (article/letter/editorial) | | minerals and rocks in the Belaya Zima carbonatite complex (Russia): Implications for the mechanisms of magma...minerals and rocks in the Belaya Zima carbonatite complex (Russia): Implications for the mechanisms of magma...minerals and rocks in the Belaya Zima carbonatite complex (Russia): T implications for the mechanisms of...igneous petrologists. The Belaya Zima plutonic complex in southern Siberia is a typical intrusion, in...are spatially and temporally associated with the ijolite D series rocks and nepheline syenites. In this |  | | Journal (article/letter/editorial) | | provide a guide for interpretation of the more complex natural system, peridotite-COr H 2 0. The oxygen...(1978a) and Otto (1984). The relationships are complex, but the solidus curve for synthetic lherzolite...that the primary magma at the Alno Island alkali complex was a carbonatite composed largely of alkali carbonateG...join between a silicate mixture approximating ijolite (acmite, nepheline and sodium disilicate) and carbonate...or transmission electron microscopy. The common ijolite-nephelinite-carbonatite associations are characterized |
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