Geologica acta

Geologica acta 17 records found  Search took 0.01 seconds. 
1.
5 p, 129.8 KB Foreword. Caribbean Tectonic, Magmatic, Metamorphic and Stratigraphic Events. Implications for Plate Tectonics / Iturralde-Vinent, M.A. (Museo Nacional de Historia Natural) ; Lidiak, E.G. (University of Pittsburgh. Department of Geology and Planetary Science)
2006 - 10.1344/105.000000355
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 1-5  
2.
27 p, 1.7 MB Role of crustal melting in petrogenesis of the Cretaceous Water Island Formation (Virgin Islands, northeast Antilles Island arc) / Jolly, W.T. (Brock University. Department of Earth Sciences) ; Lidiak, E.G. (University of Pittsburgh. Department of Geology and Planetary Science)
The latest Aptian to earliest Albian (~115 Ma) Water Island Fm in the Virgin Islands contains some of the oldest known arc-related strata in the Greater Antilles Island Arc. Hence, the unit is of considerable significance in tectonic reconstructions of initial subduction parameters along the long-lived destructive plate margin separating the North American and Caribbean Plates. [...]
2006 - 10.1344/105.000000356
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 7-33  
3.
27 p, 2.4 MB Cretaceous to Mid-Eocene pelagic sediment budget in Puerto Rico and the Virgin Islands (northeast Antilles Island arc) / Jolly, W.T. (Brock University. Department of Earth Sciences) ; Lidiak, E.G. (University of Pittsburgh. Department of Geology and Planetary Science) ; Dickin, A.P. (McMaster University. Department of Geology and Geography)
Island arc basalts (IAB) in the Greater Antilles, dating between Albian and mid-Eocene time (~112 to 45 Ma), consist of an early low-K, primitive island arc (PIA) basalt series and a later, predominantly intermediate calcalkaline (CA) series. [...]
2006 - 10.1344/105.000000357
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 35-62  
4.
26 p, 2.5 MB High pressure metamorphism of ophiolites in Cuba / García-Casco, A. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Torres-Roldán, R.L. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Iturralde-Vinent, M.A. (Museo Nacional de Historia Natural) ; Millán, G. (Cuba. Instituto de Geología y Paleontología) ; Núñez Cambra, K. (Cuba. Instituto de Geología y Paleontología) ; Lázaro, C. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Rodríguez Vega, A. (Instituto Superior Minero-Metalúrgico. Departamento de Geología)
High-pressure metamorphic complexes of ophiolitic material in Cuba trace the evolution of the northern margin of the Caribbean Plate during the Mesozoic. In the northern ophiolite belt of western and central Cuba, these complexes document cold (i. [...]
2006 - 10.1344/105.000000358
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 63-88  
5.
19 p, 3.6 MB Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba / Iturralde-Vinent, M.A. (Museo Nacional de Historia Natural) ; Díaz-Otero, C. (Cuba. Instituto de Geología y Paleontología) ; Rodríguez-Vega, A. (Cuba. Instituto Superior Minero-Metalúrgico) ; Díaz-Martínez, R. (Cuba. Instituto Superior Minero-Metalúrgico)
The sedimentary rocks intercalated in volcanic and metavolcanic sections of Mayarí-Baracoa and Sierra del Purial Mountains (Eastern Cuba), yielded Cretaceous through Danian microfossils. In the Mayarí Mountains the Téneme Fm consists of basalts and hyaloclastites with minor intercalations of well-bedded foliated limestone and shaly limestone that in the type area contain a Turonian or early Coniacian planktonic foraminifera assemblage. [...]
2006 - 10.1344/105.000000359
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 89-102  
6.
19 p, 12.9 MB Primitive Cretaceous island-arc volcanic rocks in eastern Cuba : the Téneme Formation / Proenza, J. A. (Universitat de Barcelona. Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals) ; Díaz-Martínez, R. (Instituto Superior Minero Metalúrgico de Moa. Departamento de Geología) ; Iriondo, A. (Universidad Nacional Autónoma de México. Centro de Geociencias) ; Marchesi, C. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Melgarejo i Draper, Joan Carles (Universitat de Barcelona. Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals) ; Gervilla Linares, Fernando (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Garrido, C. J. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Rodríguez Vega, Antonio (Instituto Superior Minero Metalúrgico de Moa. Departamento de Geología) ; Lozano Santacruz, Rufino (Universidad Nacional Autónoma de México. Instituto de Geología) ; Blanco-Moreno, J.A. (Instituto Superior Minero Metalúrgico de Moa. Departamento de Geología)
The Téneme Formation is located in the Mayarí-Cristal ophiolitic massif and represents one of the three Cretaceous volcanic Formations established in northeastern Cuba. Téneme volcanics are cut by small bodies of 89. [...]
2006 - 10.1344/105.000000360
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 103-121  
7.
28 p, 9.0 MB Geology, age and tectonic evolution of the Sierra Maestra Mountains, southeastern Cuba / Bojar, A.V. (Universität Graz. Institut für Geologie und Paläontologie) ; García-Delgado, D.E. (Cuba. Instituto de Geología y Paleontología) ; Rojas-Agramonte, Y. (Universität Mainz. Institut für Geowissenschaften) ; Neubauer, F. (Universität Salzburg. Fachbereich Geographie) ; Hejl, E. (Universität Salzburg. Fachbereich Geographie) ; Handler, R. (Universität Salzburg. Fachbereich Geographie)
We summarize the available geological information on the Sierra Maestra Mountains in southeastern Cuba and report new zircon fission track and biotite Ar-Ar ages for this region. Two different and genetically unrelated volcanic arc sequences occur in the Sierra Maestra, one Cretaceous in age (pre-Maastrichtian) and restricted to a few outcrops on the southern coast, and the other Palaeogene in age, forming the main expression of the mountain range. [...]
2006 - 10.1344/105.000000361
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 123-150  
8.
20 p, 1.7 MB Structure, tectonics and metamorphic development of the Sancti Spiritus Dome (eastern Escambray massif, Central Cuba) / Baumann, A. (Universität Münster. Institut für Mineralogie) ; Maresch, W.V. (Ruhr-Universität Bochum. Institut für Geologie, Mineralogie und Geophysik) ; Grafe, F. (IBeWa Consulting) ; Grevel, Ch. (ERFTCARBON GmbH & Co KG) ; Stanek, K.P. (Universität Bergakademie Freiberg. Institut für Geologie)
The Sancti Spiritus Dome of the eastern Escambray (Cuba) represents a metamorphic fold and thrust structure which was part of the Cretaceous subduction-accretion complex of the Greater Antillean Arc. [...]
2006 - 10.1344/105.000000362
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 151-170  
9.
8 p, 483.8 KB Timing and implications of Late Cretaceous tectonic and sedimentary events in Jamaica / Mitchell, S. F. (University of the West Indies (Jamaica). Department of Geography and Geology)
The Cretaceous succession in Jamaica can be divided into sedimentary packages bounded by major unconformities (synthems). On the base of biostratigraphy and ages derived from strontium isotope ratios, these unconformities have been dated as Early Santonian, Late Campanian-Early Maastrichtian and Early Eocene. [...]
2006 - 10.1344/105.000000363
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 171-178  
10.
13 p, 1.2 MB Evidence for middle Cretaceous accretion at Santa Elena Peninsula (Santa Rosa Accretionary Complex), Costa Rica / Baumgartner, P.O. (Université de Lausanne. Institut de Géologie et Paléontologie) ; Denyer, P. (Universidad de Costa Rica. Escuela Centroamericana de Geología)
An oceanic assemblage of alkaline basalts, radiolarites and polymictic breccias forms the tectonic substratum of the Santa Elena Nappe, which is constituted by extensive outcrops of ultramafic and mafic rocks of the Santa Elena Peninsula (NW Costa Rica). [...]
2006 - 10.1344/105.000000364
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 179-191  
11.
10 p, 732.3 KB Magmatic and geotectonic significance of Santa Elena Peninsula, Costa Rica / Gazel, E. (Universidad de Costa Rica. Escuela Centroamericana de Geología) ; Denyer, P. (Universidad de Costa Rica. Escuela Centroamericana de Geología) ; Baumgartner, P.O. (Université de Lausanne. Institut de Géologie et Paléontologie)
We present a new integrated interpretation of the geochemistry and geotectonic significance of the Santa Elena Peninsula, which is divided in three units: 1) an overthrust allocthonous unit of ultramafic and mafic rocks, the Santa Elena Nappe; 2) an autochthonous basaltic sedimentary suite, resting immediately below the overthrust, the Santa Rosa Accretionary Complex; and 3) Islas Murciélago pillow and massive basaltic flows. [...]
2006 - 10.1344/105.000000365
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 193-202  
12.
16 p, 2.0 MB Emplacement of Jurassic-Lower Cretaceous radiolarites of the Nicoya Complex (Costa Rica) / Denyer, P. (Universidad de Costa Rica. Escuela Centroamericana de Geología) ; Baumgartner, P.O. (Université de Lausanne. Institut de Géologie et Paléontologie)
We present a new model to explain the origin, emplacement and stratigraphy of the Nicoya Complex in the NW part of the Nicoya Peninsula (Costa Rica) based on twenty-five years of field work, accompanied with the evolution of geochemical, vulcanological, petrological, sedimentological and paleontological paradigms. [...]
2006 - 10.1344/105.000000366
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 203-218  
13.
17 p, 1.4 MB Characterization and tectonic implications of Mesozoic-Cenozoic oceanic assemblages of Costa Rica and Western Panama / Denyer, P. (Universidad de Costa Rica. Escuela Centroamericana de Geología) ; Baumgartner, P.O. (Université de Lausanne. Institut de Géologie et Paléontologie) ; Gazel, E. (Universidad de Costa Rica. Escuela Centroamericana de Geología)
The Pacific face of Costa Rica and western Panama has been extensively studied because of the wide occurrence of oceanic assemblages. In Northern Costa Rica, the Santa Elena Nappe made by ultramafic and mafic associations overthrusts the Santa Rosa Accretionary Complex. [...]
2006 - 10.1344/105.000000367
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 219-235  
14.
27 p, 1.3 MB Ophiolite-Related Ultramafic Rocks (Serpentinites) in the Caribbean Region : a Review of their Occurrence, Composition, Origin, Emplacement and Ni-Laterite Soil Formation / Lewis, J. F. (The George Washington University. Department of Earth and Environmental Sciences) ; Draper, G. (Florida International University. Department of Earth Sciences) ; Espaillat, J. (Corporación Minera Dominicana) ; Proenza, J. A. (Universitat de Barcelona. Departament de Cristalografia, Mineralogia i Dipòsits Minerals) ; Jiménez, J. (Falconbridge Dominicana)
Ultramafic rocks, mainly serpentinized peridotites of mantle origin, are mostly associated with the ophiolites of Mesozoic age that occur in belts along three of the margins of the Caribbean plate. The most extensive exposures are in Cuba. [...]
2006 - 10.1344/105.000000368
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 237-263  
15.
13 p, 1.1 MB Caribbean Plate margin evolution : constraints and current problems / Giunta, G. (Università di Palermo. Dipartimento di Geologia e Geodesia) ; Beccaluva, L. (Università di Ferrara. Dipartimento Scienze della Terra) ; Siena, F. (Università di Ferrara. Dipartimento Scienze della Terra)
Oceanic crust was generated at multiple spreading centres during the Jurassic and Early Cretaceous, forming a "proto-Caribbean" oceanic domain. During the Cretaceous, part of that crustal domain thickened into an oceanic plateau, of petrologic Mid-Ocean Ridge (MOR) to Ocean Island Basalt (OIB) affinity. [...]
2006 - 10.1344/105.000000369
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 265-277  
16.
24 p, 977.7 KB Arguments for and against the Pacific origin of the Caribbean Plate : discussion, finding for an inter-American origin / James, K. H. (Institute of Geography and Earth Sciences (Aberystwyth, Regne Unit))
Arguments in support of the Pacific origin for the Caribbean Plate are discussed along with others that point to an inter-American origin. Entry of a Pacific-derived plate would have involved unlikely, geometrically complex and highly diachronous events. [...]
2006 - 10.1344/105.000000370
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 279-302  
17.
39 p, 5.2 MB Foundations of Gulf of Mexico and Caribbean evolution : eight controversies resolved / Pindell, J. (Rice University. Department of Earth Science) ; Kennan, L. (Tectonic Analysis Ltd.) ; Draper, G. (Florida International University. Department of Earth Sciences) ; Maresch, W.V. (Ruhr-Universität Bochum. Institut für Geologie, Mineralogie und Geophysik) ; Stanek, K.P. (TU Bergakademie Freiberg. German Institut für Geologie)
Eight points of recurring controversy regarding the primary foundations of models of Gulf of Mexico and Caribbean tectonic evolution are identified and examined. The eight points are controversial mainly because of the disconnect between different scales of thinking by different workers, a common but unfortunate problem in the geological profession. [...]
2006 - 10.1344/105.000000371
Geologica acta, Vol. 4, Núm. 1-2 (2006) , p. 303-341  

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