 | | Report (chapter) | | Roberts & Gale 1978), involving a late Precambrian ocean opening followed by Cambrian sea-floor spreading...essentially a continuum with one major episode of mid-Palaeozoic orogenic deformation. The alternative...Finnmarkian orogeny is in the northernmost part of Norway where the following sequence of events has been...Vendian times a 650 Ma diabase dykeswarm with mid-ocean ridge basalt (MORB) geochemistry was emplaced into rocks...is consistent with incipient opening of Iapetus Ocean (Gee 1975, Solymon et al. 1978, Claesson & Roddick |  | | Report (chapter) | | along the northern margins of the North Atlantic Ocean. Scandian (Silurian–Devonian) underthrusting of...outer margin dominated by mafic magma and continent–ocean transition zone; (3) Iapetus oceanic terranes; and...years, at least. Terranes derived from the Iapetus Ocean separate Baltoscandian and Laurentian margin allochthons...margin and outermost continent–ocean transition zone (COT), Iapetus Ocean terranes, and Laurentian continental...late Cambrian– Ordovician closure of the Iapetus Ocean. Subsequent Scandian collision of Baltica with Laurentia |  | | Report (chapter) | | metatonalite from the Kjosen Unit of the Lyngen Magmatic Complex, northern Norway GRAHAME J.H. OLlV ER & THOMAS...metatonalite from the Kjosen Unit of the Lyngen Magmatic Complex, northern Norway. Nor. geo/. unders. Bull. 428...from within metagabbro of the Kjosen Unit of the Lyngen Magmatic Complex give a concordant U-Pb age of...development of the Karmoy Ophiolite Complex of Southwest Norway . Grahame J.H .Oliver, Geology Department. The...Introduction The Lyngen Gabbro Complex of Randall (1971 ) has been renamed the Lyngen Magmatic Complex |  | | Report (chapter) | | during the late Finnmarkian deformation in northern Norway. E of the Iapetus suture in N America, southern...terranes formed the rifted margins of the Iapetus Ocean. Type II, or accreted, terranes appear not to have...suture this basement had experienced high-grade mid-Proterozoic (Grenvillian) or, in the case of N W...Submarine calc-alkaline and oceanic tho lei it e basalt lavas and intrusives, possibly trench-related,...of Grenville I Province {Strong, 19/4a) J / Ocean ridge oph)o~ite (Bay of Islands Com.)~'((Malpas, 1977; |  | Augland, Lars Eivind, Andresen, Arild, Corfu, Fernando, Simonsen, Siri L., Andersen, Tom (2012) The Beiarn Nappe Complex: A record of Laurentian Early Silurian arc magmatism in the Uppermost Allochthon, Scandinavian Caledonides. Lithos, 146. 233-252 doi:10.1016/j.lithos.2012.05.016 | Journal (article/letter/editorial) | | University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, Norway a r t i c l e i n f o Article history: Received...the Salten area, the Beiarn Nappe Complex, North Norway. We also report Lu–Hf isotopic data on zircons...to represent the former Baltic–Iapetus continent–ocean transition (Stephens and Gee, 1985), and 2) ophiolites...ophiolites and island arc terranes of the Iapetus Ocean (Harland and Gayer, 1972) represented by the Køli...1998). The Kalak Nappe Complex in northernmost Norway (Fig. 1a), traditionally ascribed to the Middle |  | | Journal (article/letter/editorial) | | water on phase equilibria of a hydrous tholeiitic basalt Sandrin T. Feig • Jürgen Koepke • Jonathan E....experimentally using a primitive tholeiitic basalt composition relevant to the ocean crust. The crystallization experiments...negligible effect. Keywords Oxygen fugacity Water Basalt Phase equilibria Differentiation Crystallization...the addition of water to a nominally dry mid-ocean ridge basalt (MORB) system could result in an increase...Sisson and Grove (1993), who were using high-alumina basalt as starting material. They showed that fO2 and |  | Marchesi, Claudio, Garrido, Carlos J., Godard, Marguerite, Belley, France, Ferré, Eric (2009) Migration and accumulation of ultra-depleted subduction-related melts in the Massif du Sud ophiolite (New Caledonia) Chemical Geology, 266 (3) 171-186 doi:10.1016/j.chemgeo.2009.06.004 | Journal (article/letter/editorial) | | incompatible elements have been rarely reported in mid-oceanic spreading ridges (e.g., Humler ⁎ Corresponding...of melts from an ultra-depleted mantle source. In mid-oceanic ridges and ophiolites they are generally...Kelemen, 1997; Koga et al., 2001). Fields of ocean ridge cumulates and Izu–Bonin arc volcanic rocks from...compositions are unusual in magmas produced at ocean ridges and typically characterize the andesitic–boninitic...in (b) from Marchesi et al. (2006). Fields of ocean ridge (dotted line) and island arc (grey area) crustal |  | Liu, Chuan-Zhou, Zhang, Chang, Yang, Liu-Yang, Zhang, Liang-Liang, Ji, Wei-Qiang, Wu, Fu-Yuan (2014) Formation of gabbronorites in the Purang ophiolite (SW Tibet) through melting of hydrothermally altered mantle along a detachment fault. Lithos, 205. 127-141 doi:10.1016/j.lithos.2014.06.019 | Journal (article/letter/editorial) | | melting along a detachment fault at a slow-spreading ridge that was triggered by the upwelling asthenosphere...that the Purang ophiolite was formed in the mid-ocean ridge rather than subduction-related settings. ©...crystallization of melts with compositions of mid-ocean ridge basalts (MORB). It has been suggested that...have also been suggested to form at the midocean ridge (MOR). Juteau et al. (1988) explained that the gabbronorites...from extremely differentiated magmas at a mid-ocean ridge segment-end, whereas Boudier et al. (2000) |  | | Report (issue) | | accretion of deformed turbidite fans and remnant ocean basins: Exa,nples from Neoproterozoic and Phanerozoic...Square ten·ane: Possible Siluro-Devonian remnant ocean basin in the Inner Piedmont, southern Appalachians...basement culminations, frontal Appalachian Blue Ridge, Georgia, USA ....................................International Basement Tectonics Conference in Oak Ridge. Tennessee, 27 June-l July 2004. Several additional...University of Tennessee-KnoxvilJe, and the Oak Ridge National Laboratory. Partial financial support for |  | | 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...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 .......... ........ |  | | Book | | I: PROCESSES AT SPREADING CENTERS A) Crust 4 Ridge Crest Magma Chambers: A Review of Results from Marine...and Transfer Faults: Integral Components of Mid-Atlantic Ridge Extensional Systems Karson, I.A. Rooting...Regeneration Processes in Upper Mantle of Continental and Ocean Rift Zones Dobretsov, N.L. and Ashchepkov, I.V....chambers, wehrlite intrusions, mantle diapirism and ridge hydrothermalism. Recent models based on field studies...playa major role in clarifying our understanding of ridge processes. The abundant wehrlite intrusions seem |  | | Book | | Ilmenite from Løvjomås, Froland, near Arendal (Norway) (photo © F. Neukirchen/Mineralogical Collections...Sometimes measurement systems are distributed on the ocean floor instead (especially, when a producing oil...ship is returned to the sea. Sludge drifting in ocean currents can affect the gills of fish and any reduction...Claims have been staked in the Pacific and the Indian Ocean and countries such as Germany, France, China, Japan...crust is about 5 km thick and consists largely of basalt and gabbro. Both are igneous rocks whose composition |
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