 | Halbach, P., Gursky, H.-J., Gursky, M.M., Schmidt-Effing, R., Maresch, W.V. (1992) Composition and formation of fossil manganese nodules in Jurassic to Cretaceous radiolarites from the Nicoya Ophiolite Complex (NW Costa Rica) Mineralium Deposita, 27 (2) doi:10.1007/bf00197101 | Journal (article/letter/editorial) |
| Cretaceous radiolarites from the Nicoya Ophiolite Complex (NW Costa Rica) P. Halbach z, H.-J. Gursky 2,...radiolarian cherts within the Nicoya Ophiolite Complex (NW Costa Rica). Field studies, X-ray diffraction...mineralizations in cherts and jaspers of the Nicoya Complex has been described in detail by Denyer and...and 8b~15, -o I I cover rock, mainly Upper Nicoya Complex ~ el coco Punto, ConchotForrnotior assotiafed...z'ock5 o ff~ L~er a M Up~r Nicoya Comp Punta 5ordo ~ r mainly Lower Nicoya Complex sami,~a~ - 10"30" |
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| low level plagiogranites from the Nicoya ophiolite complex, Costa Rica, Central America By Heiko G. H....WILDBERG,Karlsruhe*) Zusammenfassung Im Unteren Nicoya-Komplex, einer als jurassisch-kretazische Ozeankruste...Fraktionierungsreihe saurer Magmatite im Unteren Nicoya-Komplex mit im Laufe der Differentiation steigenden...Intrusion von basischen Schmelzen in den Unteren Nicoya-Komplex bei der Bildung eines primitiven, oberkretazischen...crust of the Jurassic-Cretaceous ophiolitic Nicoya complex are distinguished. High level plagiogranites |
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| EXHAL.47'II 'E MANGANESE OPHIOLITE COMPLEX, DEPOSITS OF THE NICO YA COSTA RICA Introduction productionof...most promising manganesedeposits of the Nicoya Peninsula, Costa Rica, were studied. Selec- group of workingsnear...(1962) Nicoya ophiolite complex. sites show old small-scaleworkings. The largest This complex, which...PUNTA 3 SANTA ROSA GORDA I6 PARAI SO o COST NICOYA o I7 I8 I10 III PACIFIC OCEAN 112 AN JU...the main manganiferous areas in the Nicoya Pen{nsula, Costa Rica' occurrencesof massive sulfide bodies |
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| Wildberg, H. (1982) The ophiolite sequence in northwestern Costa Rica (Nicoya Complex): outlines of stratigraphical...(1988) Anfilisis tect6nico de la Peninsula de Nicoya (Costa Rica) y su significado para el desarrollo est... Rev. geol. Am6r. central. 8:19-75. San Jos6/Costa Rica Halbach, P., Scherhag, C., Hebisch, U., Marchig...Cretaceous and Paleogene cherts from western Costa Rica. Dev. Sedimentol. 36:143 174. Amsterdam H uebner...exhalative manganese deposits of the Nicoya Ophiolite Complex, Costa Rica. Econ. Geol. 74:672-678. Lancaster |
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| volcanological, petrological and geochemical evidence from Costa Rican oceanic crustal segments Received: 29 July...Abstract The Quepos, Nicoya and Herradura oceanic igneous terranes in Costa Rica are conspicuous features...interpreted as an uplifted seamount/ocean island complex. The Nicoya (&90 Ma) and Herradura terranes consist of...oceanic plateau. Major and trace element data from Nicoya/Herradura tholeiites indicate higher melting temperatures...volcanological, petrological and geochemical data from Costa Rican volcanic terranes, combined with published |
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| survey of the Osa Peninsula and environs, southern Costa Rica Overseas Geology and Mineral Resources S. BARRITT...southern Costa Rica 3 _Geological sketch-map of the Osa • Peninsula, southern 2 Costa Rica In back cover...tipped 3 wedge basins and highlands in southern Costa Rica and western Panama 4 4 Daily drift curves for...readings at station SA1 5 Bouguer anomaly maps of Costa Rica 7 5 6 Bouguer anomaly map of the Osa Peninsula...survey of the Osa Peninsula and environs, southern Costa Rica. Overseas Geology and Mineral Resources, No. |
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| Trench, Nicoya Peninsula, Costa Rica Neff Lundberg SUMMARY: The Nicoya Peninsula of Costa Rica represents...and is composed of the Nicoya Complex and its sedimentary cover. The Nicoya Complex is upper Mesozoic oceanic...intra-oceanic arc-trench system. Sediments of the Nicoya Complex are open-ocean deposits, comprising locally...derived sedimentary breccias made up of recycled Nicoya Complex material as well as more typically pelagic...and sedimentary breccias reflect recycling of Nicoya Complex material, apparently by uplift and erosion |
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| petrochemical and metallogenic characteristics of the Costa Rican gold belt: contribution to new explorations...Zusammenfassung Der goldfiihrende Giirtel von Costa Rica befindet sich in dem nordwestlichen Tell des...kalkaikalischen Gesteine des goldfiihrenden Giirtels von Costa Rica slnd anscheinend an inkopatiblen Elementen mit...vergleichbar *) Author's addresses: C. CIGOLINI, haly-Costa Rica Technical Cooperation Programme, Direcci6n de...Geologfa, Minas e Hidrocarburos Apdo 4752, San Josfi Costa Rica. Present address: Via Don Murialdo 18, 10142 |
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| (northern Venezuela) plate margins consist mainly of ophiolite decorated shear zones that represent collisional...margins Caribbean marginal belts are the product of complex interaction between several first-order geotectonic...important geological features are reported below. Costa Rica The western margin of the Caribbean Plate involves...Chorotega and Chocó. The Santa Elena and Nicoya complexes of Costa Rica (Fig. 2) are two of the most important...Motagua (Guatemala); BH, Bahamas; NO, Northern Ophiolite; AC, Cretaceous Arc; MU, Mabujna; ET, Escambray; |
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| Mesozoic formations along the Pacific coast of Costa Rica and Panama. The regional significance of such...On the other hand, in Isth&an Central America (Costa Rica and Panama), the oldest formations, pre-Campanian...outcrop along the Pacific coast, and consist, in Costa Rica, of an ophiolitic nappe (Santa Elena) and several...and sedimentary units (Nicoya complex), and in PGama, of a ‘basic igneous complex’. These units were tectonized... or metamorphic remnants of an older volcanic complex (Del Guidice & Recchi, 1969; Ferencic, 1971; Ferencic |
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| elsevier.com/locate/epsl Seismic attenuation in the Costa Rica margin wedge: amplitude modeling of ocean bottom...landward of the Middle America Trench offshore Costa Rica. These two profiles bracket a region of rapid...making up the margin wedge, either ophiolitic Nicoya Complex rocks, dewatered and cemented sediments, or...Elsevier Science B.V. All rights reserved. Keywords: Costa Rica; attenuation; ocean bottom seismographs; hydrophones;...perpendicular dip line pro¢les, collected o¡shore Costa Rica. In contrast to the ray theory, the re£ectivity |
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| Caribbean oceanic crust; CAR Caribbean plate; C.P.Arc Costa Rica–Panama Arc; FAR Farallon plate; G.Ant. Greater...on oceanic crust exposed at the Nicoya ophiolite complex in Costa Rica determine ages between 83 and 90...rocks in Costa Rica and Panama which indicates an equatorial formation of the entire ophiolite sequence...CW (1997) The 89 Ma Tortugal komatiitic suite, Costa Rica: implications for a common geological origin...subduction seamounts at the couvergent margin of Costa Rica. J Geophys Res 103: 7079-7093 Baumgartner PO |
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| mid-plate volcanism that produced such features as the Nicoya Plateau now found as an allochthonous ophiolitic...presence of a submarine volcanic flow and sill complex of tholeiitic basalt and dolerite, the top of which...4°Ar-39Ar age of 110 + 3 m.y. fog a basalt within this complex has been reported [16]: the sills and flows are...Aptian to late Santonian [18]. Within the igneous complex there are rafts of sediment, one of which contains...and extrusive (solid pillow ornament) igneous complex [ 15]. Time scale from Van Hinte [ 18]. Duration |
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| com/locate/gca Progressive barite dissolution in the Costa Rica forearc – Implications for global fluxes of Ba...and sediments from the shallow forearc of the Costa Rica subduction zone to investigate the impact of...Ba flux to the volcanic arc and mantle. At the Costa Rica subduction zone, the entire sediment section...sediment Progressive barite dissolution in the Costa Rica forearc The Ba in aluminosilicates is typically...barite dissolution in the shallow forearc of the Costa Rica SO42- (mM) 0 5 10 15 20 25 30 SO42- |
 | Bangs, Nathan L., McIntosh, Kirk D., Silver, Eli A., Kluesner, Jared W., Ranero, César R. (2016) A recent phase of accretion along the southern Costa Rican subduction zone. Earth and Planetary Science Letters, 443. 204-215 doi:10.1016/j.epsl.2016.03.008 | Journal (article/letter/editorial) |
| A recent phase of accretion along the southern Costa Rican subduction zone Nathan L. Bangs a,∗ , Kirk...Keywords: subduction accretion tectonic erosion Costa Rican subduction zone 3D seismic imaging accretionary...volume across the Costa Rica margin NW of the Osa Peninsula to investigate the complex structure and the...development of the seismogenic zone within the Costa Rican subduction zone in the vicinity of recent...V. All rights reserved. 1. Introduction The Costa Rica margin is one among about half of the world’s |
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| Falotta and Parsettens (Oberhalbstein, Grison Canton, Switzerland) are enclosed in Upper Jurassic radiolarites...comme ceux de Costa Rica (Kuypers et Denyer 1979). Si les nodules fossiles de Costa Rica, qui ont subi...exhalative manganese deposits of the Nicoya ophiolite complex, Costa-Rica. Econ. Geol. 74:672-678 (1979) Perseil |
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| Preorogenic metamorphicand tectonicevolutionof the ophiolite areasof high geothermalgradient (e.g., sill intru-...p. 93-101. manganesedepositsof the Nicoya ophiolite complex,Costa Rona,P. A., 1980, TAG hydrothermalfield:...hydrothermalfield: Mid-AtlanticRidge -- Rica: ECON. GEOL., v. 74, p. 672-678. crest at latitude 26øN: Geol. Soc |
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| Medellı́n, Colombia 13 Universidad Nacional-Costa Rica, Costa Rica *Corresponding author (e-mail: ramon.blanco@usc...regimes of South and Central America act on a complex geology and tectonic framework. Many of the rock...conditions, tidal ranges and wave regimes act on a complex geology and tectonic framework. Many of the rock...located on the western side of the continent (Costa Rica, Ecuador, Peru, Chile) whereas to the East (Brazil...uplift), as proposed by Armijo & Thiele (1990). Complex retroactions occur, linked to changes in plate |
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| and Database of Quaternary Faults and Folds in Costa Rica and its Offshore Regions By Walter Montero, Percy...and Database of Quaternary Faults and Folds in Costa Rica and its Offshore Regions A project of the International...Centroamericana de Geologia Universidad de Costa Rica San Jos6, Costa Rica 2 Departamento de Geologia Institute...Institute Costarricense de Electricidad San Jose, Costa Rica 3 Institute de Geociencias Universidad de Panama...map of active or Quaternary faults existed for Costa Rica or any other country within Central America, |
 | Vernikovskiy, Valeriy A., Vernikovskaya, Antonina E., Lyapunov, Sergey M., Neimark, Leonid A., Proskurnin, Vasiliy F., Chernykh, Aleksandr I., Safonova, Inna Yu. (1994) Petrology, Geochemistry, and Tectonic Setting of Plagiogranites of the Chelyuskin Ophiolite Belt. International Geology Review, 36 (10) 961-974 doi:10.1080/00206819409465498 | Journal (article/letter/editorial) |
| Tectonic Setting of Plagiogranites of the Chelyuskin Ophiolite Belt a a Valeriy A. Vernikovskiy , Antonina...Tectonic Setting of Plagiogranites of the Chelyuskin Ophiolite Belt, International Geology Review, 36:10, 961-974...Tectonic Setting of Plagiogranites of the Chelyuskin Ophiolite Belt 1 VALERIY A. VERNIKOVSKIY, ANTONINA E. VERNIKOVSKAYA...ancient arc. Introduction PLAGIOGRANITES OF OPHIOLITE complexes have been described by various investigators...plagiogranites are the most suitable choice for ophiolite dating, because they afford the opportunity to |
 | Barbieri, M., Caggianelli, A., Di Florio, M. R., Lorenzoni, S. (1994) Plagiogranites and gabbroic rocks from the Mingora ophiolitic mélange, Swat Valley, NW Frontier Province, Pakistan. Mineralogical Magazine, 58 (393) 553-566 doi:10.1180/minmag.1994.058.393.03 | Journal (article/letter/editorial) |
| Mingora ophiolitic m61ange, Swat Valley, NW Frontier Province, Pakistan M. BARBIERI Dipartimento di Scienze...and albitites in the ophiolite assemblage from Swat Valley (NW Frontier Province, Pakistan). Petrographic...close to sea water. These features suggest a more complex origin with respect to gabbroic rocks and plagiogranites...distinguish this m~lange: 1) the abundance of ophiolite suite rocks; 2) the presence of talc-dolomite...of the oceanic magmatic rocks. R a n d o m , ophiolite-derived blocks and fragments can be found within |
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| from one or both of the following factors. First, complex or polyphase orogeny can mix source rocks of different...granite research have provided ample evidence of how complex these rocks can be (e.g., H.-J. Fijrster et al...Granites are time- and space-integrated products of a complex evolution. The time elapsed from melt initiation...very helpful. We placed particular emphasis on complex or polyphase tectonic settings, which were mentioned...suites. The tectonic assignment of the Karmoy ophiolite is controversial. Pederson and Malpas (1984) suggested |
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| anorthoslte-gabbro and magnetite ilmenlte in intrusive complex. PGE placers. Metal Concentrations NI, PGE, Cr...Gossan Geochemical Signature; Examples Stillwater Complex Cu, Ni, PGE, Co References Page (1977) Cumulus...anorthosite, minor troctolite > LAYERED STRATIFORM COMPLEX X X X X PGE zone Cumulus pyroxenite Chromite...Geochemical Signature; Examples Bushveld Stillwater Complex PGE, Cu, Ni References Vermaak & Hendriks (1976)...Layers may be cut by pipes and Fe, Ti, V Bushveld Complex References Williams (1969) and Molyneux (1969) |
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| geochemical characteristics of plagiogranites from Naga Ophiolite Belt, northeast India: Fractional crystallization...Plagiogranite Naga Ophiolite Belt (NOB) Fractional crystallization a b s t r a c t The Naga Ophiolite Belt is a...melts from mafic crust. Plagiogranites from Naga Ophiolite Belt contains moderate SiO2 (51.81–56.71 wt.%)...wt.%) and high Na2 O (4.3–5.03 wt.%). The Naga Ophiolite Belt plagiogranites like ocean-ridge granites...Na2 O and CaO. The rocks investigated from Naga Ophiolite Belt contain TiO2 concentrations above the lower |
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| adakites. In selected locations such as in Chile, Costa Rica, Japan and SW USA, strong cases can be made for...cut in a late Cretaceous lithified accretionary complex, overlain by late Oligocene conglomerates and sands...and early Cenozoic. The Franciscan subduction complex, Great Valley forearc basin, and Sierra Nevada...and coeval high-P/T Sanbagawa meta-accretionary complex (AC) in SW Japan. (A) The mid-Cretaceous arc–trench...detachment of large lensshaped masses below the Costa Rican forearc. Wells et al. (2003) suggest that |
