 | | Journal (article/letter/editorial) | | Petrology and Petrogenesis of the Monchique Alkaline Complex, Southern Portugal by N. M. S. ROCK Institute of...November 1976; in revisedform IS March 1977) Monchique is a sizeable subvolcanic ?laccolith, unusual...little to the evolution of the complex. INTRODUCTION T H E Serra de Monchique is a mountain range in the...the far south of Portugal, commanding both Atlantic coasts of that country and separating the provinces...lies parallel to the country-rock foliation. The Monchique intrusion is the type-locality for Foyaite (Blum |  | | Journal (article/letter/editorial) | | Fenitisation around the Monchique alkaline complex, Portugal N. M. S. ROCK L1THOS Rock, N. M. S. 1976:...1976: Fenitisation around the Monchique alkaline complex, Portugal. Lithos 9, 263-279. Oslo. ISSN 0024-4937...foya~'te magmas into Carboniferous pelites at Monchique has produced localised fenites of highly variable...carbonatite intrusion, there are no carbonatites at Monchique, and nepheline syenite magmas were the agents...implications than can be discussed here, the Monchique fenites do form an example of the supposedly |  | CIGOLINI, Corrado, DI MARTINO, Mario, LAIOLO, Marco, COPPOLA, Diego, ROSSETTI, Piergiorgio, MORELLI, Marco (2012) Endogenous and nonimpact origin of the Arkenu circular structures (alâKufrah basinâSE Libya) Meteoritics & Planetary Science, 47 (11) 1772-1788 doi:10.1111/maps.12012 | Journal (article/letter/editorial) | | and form a rather simple and eroded ring dike complex. Stock emplacement was followed by hydrothermal...interpreted by Orti et al. (2008) as a result of a complex volcanic-hydrothermal activity (thus favoring a...structure, in the southern Kufrah Basin, as an eroded complex impact structure, somehow similar to the Tin Bider...indicating that the Arkenu structures are the result of complex endogenous processes, so that the idea that they...structures are located from the base to the top. 1. The complex Precambrian basement (Archean to early Proterozoic) |  | | Journal (article/letter/editorial) | | type of rocks. Moreover, the U^Pb chronometer in zircon dates pri- mary solidiÂącation of the magma, and...peridotite^gabbro complex is composed of chlorite schists, derived from a meta-gabbro, for which a zircon U^Pb age...ilmenite, rutile, titanite, rare ÂŁakes of biotite and zircon. Low-grade meta- 559 morphic overprint caused...apatite, Âąbrous amphibole, epidote, and accessory zircon. The lithospheric character of the host peridotites...(ripidolite) and apatite as major phases, and ilmenite and zircon as accessory minerals. This composition is the |  | | Journal (article/letter/editorial) | | Nepheline Syenites from the Coldwell Alkaline Complex, Ontario, Canada by ROGER H. MITCHELL AND R. GARTH...syenites of Center 2 of the Coldwell alkaline complex exhibit rare wispy mafic-rich modal layering, extensive...Coldwell complex is located on the north shore of Lake Superior and is the largest alkaline complex in North...magmatic episodes were active in the formation of the complex. In Center 1, the earliest activity is represented...the presence of sodic amphiboles, fluorite and zircon. These rocks commonly carry xenoliths of country |  | | Journal (article/letter/editorial) | | and Petrology of the Red Hill Alkaline Igneous Complex, New Hampshire, U.S.A. by C. M. B. HENDERSON 1...fluid-saturated conditions. It seems likely that the complex formed by emplacement of fractionated magmas derived...after the main complex was formed. INTRODUCTION This study of the Red Hill complex forms part of continuing...previous petrological work The Red Hill intrusive complex, New Hampshire (lat. 43°N; long. 71° 21'W) covers...Fig. 1) contains analcime syenites. The Red Hill complex is an association of alkali plutonic rocks, syenite |  | Geldmacher, Jörg, Hoernle, Kaj, Hanan, Barry B., Blichert-Toft, Janne, Hauff, F., Gill, James B., Schmincke, Hans-Ulrich (2011) Hafnium isotopic variations in East Atlantic intraplate volcanism. Contributions to Mineralogy and Petrology, 162 (1) 21-36 doi:10.1007/s00410-010-0580-5 | Journal (article/letter/editorial) | | major constituent in the resistant heavy mineral zircon. In contrast to the rare earth element (REE), Lu...rrin Go 800 Iberia a eB 700 Serra de Monchique Complex Ormonde (67 Ma6) 35ËN 00 30 Ampere (31...if the volcanic massifs along the coast of SW Portugal (see Fig. 1a), possessing similar or higher 207Pb/204Pb...2000), while for the Canaries it would be a more complex mixture of the ââCââ component with a somewhat...Canary domain isotope composition reflects a more complex (heterogeneous) source mixture. The Hf isotope |  | | Journal (article/letter/editorial) | | Goldschmidt Conference Abstracts 2007 A302 Zircon as a magma mixing proxy: Textural, chemical and isotopic...(martin.whitehouse@nrm.se) Ion microprobe U-Pb zircon analyses of the Miocene Monte Capanne Plutonic...textural, chemical and Hf isotopic response of zircon to various magmatic processes, with particular...Importantly, zircon ages for these components partially overlap, suggesting that zircon was transferred...mafic and felsic magmas, where growth/resorption of zircon was also associated with reactions between other |
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