Geología de la Hoja General, Costa Rica

Alvarado, Guillermo E.; Barquero, Rafael; Taylor, Waldo; López, A. M.; Cerdas, Alexis; Murillo, Jerry

doi:10.15517/rgac.v0i40.4189

Cited by 8 publications

(10 citation statements)

References 4 publications

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“…Descartes y Fm. Térraba, Paleoceno al Mioceno Medio; Mora, 1979;Alvarado et al, 2009b;Obando, 2011), intruidas por cuerpos predominantemente básicos y sus diferenciados (gabros y monzogabros, doleritas, aplitas, andesitas, basaltos) de la Fm. Puerto Nuevo (Mora, 1979;Kussmaul, 1987).…”

Section: El Magmatismo De Arco Oligo-plioceno Plutonismo Oligo-pliocenounclassified

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Síntesis geocronológica del magmatismo, metamorfismo y metalogenia de Costa Rica, América Central

Alvarado

Gans²

2011

Rev. Geol. Amér. Central

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A comprehensive compilation of 651 (since 1968) radiometric ages determinations (415 40 Ar/ 39 Ar, 211 K/Ar, 5 U/Th, 4 Rb/Sr, 2 U/Pb, and 13 fission track thermochronology ages using zircon) provides a complete picture of the igneous stratigraphy of Costa Rica, and information about the age of the major metamorphic and metalogenic events in the region. Igneous rocks of Late Jurassic to Middle Eocene age (~ 160 to ~ 41 Ma), mainly accreted ophiolites. At the beginning of Campanian time (~ 71 Ma), the actual subduction zone was established, represented by volcanosedimentary rocks of basic to felsic composition. However, voluminous subalkaline, primary volcanic rocks appeared only after ~ 29 Ma. Intrusive to hypabyssal granitic to gabboic plutons, stocks, equivalent dykes and sills, are widely exposed in the Talamanca range (~ 12.4-7.8 Ma), Cerros de Escazú (~ 6.0-5.9 Ma), and Fila Costeña (~ 18.3-16.8 and ~ 14.8-11.1 Ma), Tapantí-Montes del Aguacate-Carpintera (~ 4.2-2.2 Ma) and Guacimal (~ 6.4-5.2 Ma). Arc rocks between 29 and 11 Ma are known in the San Carlos plains and in southern Costa Rica. The location and age of the igneous rocks indicated that there was a 20°counterclockwise rotation of the arc (termed as Proto-Volcanic Front) between 15 and 8 Ma, with a pole of rotation centered on southern Costa Rica. This rotation is attributed to deformation in the overriding plate (shortening in the south coeval with extension in the NW), accompanied by trench retreat in the south. At ~ 3.45 Ma arc-related volcanism shut off in southern part of the region, but local acid-adakite volcanism persisted in the Talamanca range (4.2-0.95 Ma) due to the subduction of the Cocos Ridge. The Paleo-Volcanic Front is represented by arc-related rocks (8-3.5 Ma) along the length of Costa Rica, parallel to but in front of the modern arc. This activity was followed by the Monteverde (2.1-1.1 Ma) andesitic/basaltic effusive event, which progressively

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Section: El Magmatismo De Arco Oligo-plioceno Plutonismo Oligo-pliocenounclassified

“…Paso Real, equivalente o sinónimo de Fm. Grifo Alto; Dengo, 1962;Henningsen, 1965;Mora, 1979;Alvarado et al, 2009b), representado por brechas basálticas monomícticas, aisladas coladas de lava (basaltos en su mayoría, escasas andesitas) y diques casuales, infrayaciendo a los conglomerados polimícticos de la Fm. Valle del General.…”

Section: Vulcanismo De La Fila Costeñaunclassified

Síntesis geocronológica del magmatismo, metamorfismo y metalogenia de Costa Rica, América Central

Alvarado

Gans²

2011

Rev. Geol. Amér. Central

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“…Entre estos se destacan los trabajos de cartografiado geológico (Alvarado, 2009;Alvarado et al, 2009;Obando & Kussmaul, 2009;Žáček et al, 2012). En el noroeste de Costa Rica, es importante destacar el trabajo de Montero & Denyer, 2011), tanto porque cubre una zona amplia, como es la penínsu-la de Nicoya, como por el modelo neotectónico que proponen para explicar el arreglo de fallas y pliegues determinado.…”

Section: Discusión Y Conclusionesunclassified

Neotectónica en la Revista Geológica de América Central

Montero

2014

Rev. Geol. Amér. Central

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RESUMEN: Una revisión de los artículos publicados en la Revista Geológica de América Central se ha realizado para los últimos treinta años , con el objetivo de identificar estudios relacionados con el campo de la neotectóni-ca. Las investigaciones determinadas se dividieron en dos áreas geográficas: 1. América Central y el Caribe y 2. Costa Rica, los cuales a su vez se subdividen en los que tienen como área temática el país completo, los del noroeste, los del centro, del caribe y los del sur del territorio nacional. Con respecto al impacto de la Revista Geológica de América Central en el avance del conocimiento en el campo de la neotectónica, se encuentra que este ha sido muy limitado en lo relativo a la región de América Central y el Caribe, donde hay pocos trabajos publicados (9,2 % del total) y tienen MONTERO, W., 2014: Neotectónica en la Revista

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“…The Cordillera de Talamanca is composed of andesitic volcanic rocks of Mio-Pliocene age and largely of granodioritic plutonic rocks of Miocene age. On the SW flank of the Fila Brunqueña a mountainous complex of Oligocene-Miocene turbidite shales, conglomerates, and sandstones can be found (Alvarado, Barquero, Taylor, López et al 2009;Alvarado, Barquero, Taylor, Mora et al, 2009;Denyer & Alvarado, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The UGRB basin has been examined in a number of aspects including geology (Alvarado, Barquero, Taylor, López et al 2009;Alvarado, Barquero, Taylor, Mora et al, 2009), glacial landforms in summit areas above 3000 m (Bergoeing, 1977;Barquero & Ellenberg, 1983;Horn, 1990;Orvis & Horn, 2000;Lachniet & Seltzer, 2002), mapping of alluvial fans (Kesel & Spicer, 1985;Bergoeing, Brenes, Fernández, & Ureña, 2010), and its geomorphology (Quesada-Román, 2016;Quesada-Román, 2017). In this case we present a 1:25,000 scale geomorphological map of the Upper General River Basin (UGRB) in Costa Rica.…”

Section: Introductionmentioning

confidence: 99%

Geomorphology of the Upper General River Basin, Costa Rica

Quesada‐Román

Zamorano-Orózco

2018

Journal of Maps

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In spite of the geomorphological diversity of Central America and Costa Rica, there are few detailed geomorphological maps. A 1:25,000 scale map of the Upper General River Basin (UGRB) in Costa Rica is presented, based on the interpretation of aerial photographs and field geomorphological mapping. A total of 43 types of landforms divided genetically into endogenic (tectonic features), and exogenic (fluvial, gravitational, and glacial features) are mapped for an area of 1560 km 2. This cartography is important in terms of disaster prevention and mitigation (floods and hillslope processes), as well as for land use planning.

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Geología de la Hoja General, Costa Rica

Cited by 8 publications

References 4 publications

Síntesis geocronológica del magmatismo, metamorfismo y metalogenia de Costa Rica, América Central

Síntesis geocronológica del magmatismo, metamorfismo y metalogenia de Costa Rica, América Central

Neotectónica en la Revista Geológica de América Central

Geomorphology of the Upper General River Basin, Costa Rica

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