| | Journal (article/letter/editorial) | Metamorphism in oceanic layer 3, Gorringe Bank, Eastern Atlantic Catherine Mevel Laboratoire de p~trologie...Abstract. Gorringe Bank is an anomalously high structure of the eastern part of the north Atlantic, which...contact between layer 4 and layer 3 was observed on Mount Gettysburg and interpreted as tectonic. The overlying...both mounts composing the bank, Gettysburg and Ormonde. Coarse-grained to pegmatoid clinopyroxene gabbros...distinct events. Metamorphism occurred close to the ridge axis, from interaction of a seawater-derived fluid | | | Journal (article/letter/editorial) | obtained from the Iberia Abyssal Plain and from the Gorringe Bank, combined with those already known on the...zones were sampled along East-West transects of the ocean-continent transition, immediately West or at the...exposed at both the Iberia Abyssal Plain and the Gorringe Bank are clearly different. The presence of plagioclase-bearing...lower pressures ( _<0.6 GPa) registered in the Gorringe Bank gabbroic rocks and in some reexamined gabbros...Plain, transitional and depleted tholeiites at the Gorringe Bank. The trace elements and the isotope data | | | Journal (article/letter/editorial) | magmatism prior to continental break-up in the North Atlantic and geodynamic implications Urs Scha«rer a; *...the Galicia and Gorringe banks and in the Iberia Abyssal Plain of the North Atlantic, unroofed subcontinental...determined on the same grains. For Mt. Gettysburg at Gorringe, gabbro emplacement ages of 137.5 þ 0.5 (2c) Ma...mantle domains. Gabbro zircons from Mt. Ormonde at Gorringe yield a much younger age of 77.1 þ 0.4 Ma...LILE-depleted than those sampled by the about 20 Myr older Gorringe gabbros. The data demonstrate that magmatism occurring | | CIGOLINI, Corrado, DI MARTINO, Mario, LAIOLO, Marco, COPPOLA, Diego, ROSSETTI, Piergiorgio, MORELLI, Marco (2012) Endogenous and nonimpact origin of the Arkenu circular structures (al‐Kufrah basin—SE Libya) Meteoritics & Planetary Science, 47 (11) 1772-1788 doi:10.1111/maps.12012 | Journal (article/letter/editorial) | isotope and trace element signature typical of ocean island basalts (e.g., Black and Liégeois 1993)...apatite, rutile, allanite, opaques (Ti-magnetite and ilmenite) are accessory phases. Tephrites-phonotephrite-tephriphonolites...Harris et al. 1999), Monchique Complex and Mount Ormonde (Bernard-Griffiths et al. 1997; Grange et al...(REE) evidence from Serra de Monchique and Mount Ormonde complexes. Journal of Petrology 38:115–132....composition and processes. In Magmatism in the ocean basins, vol. 42, edited by Saunders A. D. and Norry | | | Book | McCLAIN, J. S. & BURNETT, M. Evo lu tion or Lhe ocean crust: resu lts from recent seisn1ic experin1ents... FISK, M. R. Depths and temperatures of mid-ocean-ridge magma chambers and the composition of their source...FLOWER, M. F. J. Spreading-rate paran1eters in ocean crust: analogue for ophiolite? .......... . SMEWl:---JG...GREGORY, R. T. Melt percolation beneath a spreading ridge: evidence from the Sen1ail peridotite, On1an .....WHITE, R . S . Atlantic ocean ic crust: seismic structure of a slow-spreadi ng ridge .......... .... | | | Journal (article/letter/editorial) | dolomite, melilite, feldspathoids, monticellite, ilmenite, perovskite, Cr-spinel, Ti-magnetite, and glass...isotope ratios for both systems resemble those of ocean island basalts ŽOIB. ŽStaudigel et al., 1984. and...ŽREE. evidence from Serra de Monchique and Mount Ormonde Complexes. J. Petrol. 38, 115–132. Brey, G.P...Saunders, A.D., Norry, M.J. ŽEds.., Magmatism in Ocean Basins. Geol. Soc. Spec. Publ. 41, pp. 313–345. |
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