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Statements

Subject Item
n2:RIV%2F00025798%3A_____%2F11%3A00000195%21RIV12-MZP-00025798
rdf:type
n6:Vysledek skos:Concept
dcterms:description
The Guacimal Pluton situated in the Cordillera de Tilarán in the NW of Costa Rica forms an oval-shaped body with an exposed surface of 60–70 km2. The pluton intruded into basic volcanic rocks of the Aguacate Group (Miocene–Pliocene) and is surrounded by a aureole of calc-silicate metasomatic rocks. The pluton is mainly formed by monzogranites to granodiorites, which strongly prevail over more basic types. The pluton was emplaced at depth of c. 3 km, crystallized at temperature of c. 760–800 °C under a relatively high oxygen fugacity (1.6–2.1 log units above the NNO buffer) and increased activities of volatiles (H2O, F) upon cooling. The prevailing, felsic rocks of the Guacimal Pluton are high-K calc-alkaline. Laser ablation ICP-MS dating of zircons from two granite samples yielded statistically identical U–Pb ages of 6.3 ± 0.5 and 6.0 ± 0.4 Ma, respectively. The Sr–Nd isotopic compositions are rather primitive (87Sr/86Sr6 = 0.70380–0.70413, e6Nd ~ +7.3 to +7.9). The Guacimal Pluton situated in the Cordillera de Tilarán in the NW of Costa Rica forms an oval-shaped body with an exposed surface of 60–70 km2. The pluton intruded into basic volcanic rocks of the Aguacate Group (Miocene–Pliocene) and is surrounded by a aureole of calc-silicate metasomatic rocks. The pluton is mainly formed by monzogranites to granodiorites, which strongly prevail over more basic types. The pluton was emplaced at depth of c. 3 km, crystallized at temperature of c. 760–800 °C under a relatively high oxygen fugacity (1.6–2.1 log units above the NNO buffer) and increased activities of volatiles (H2O, F) upon cooling. The prevailing, felsic rocks of the Guacimal Pluton are high-K calc-alkaline. Laser ablation ICP-MS dating of zircons from two granite samples yielded statistically identical U–Pb ages of 6.3 ± 0.5 and 6.0 ± 0.4 Ma, respectively. The Sr–Nd isotopic compositions are rather primitive (87Sr/86Sr6 = 0.70380–0.70413, e6Nd ~ +7.3 to +7.9).
dcterms:title
The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis
skos:prefLabel
The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis The Late Miocene Guacimal Pluton in the Cordillera de Tilarán, Costa Rica: its nature, age and petrogenesis
skos:notation
RIV/00025798:_____/11:00000195!RIV12-MZP-00025798
n6:predkladatel
n7:ico%3A00025798
n4:aktivita
n16:V
n4:aktivity
V
n4:cisloPeriodika
1
n4:dodaniDat
n13:2012
n4:domaciTvurceVysledku
n11:6824811 n11:1048724 n11:9069348 n11:7243111
n4:druhVysledku
n18:J
n4:duvernostUdaju
n17:S
n4:entitaPredkladatele
n15:predkladatel
n4:idSjednocenehoVysledku
209030
n4:idVysledku
RIV/00025798:_____/11:00000195
n4:jazykVysledku
n8:eng
n4:klicovaSlova
granitic rocks, geochemistry, mineralogy, zircon U–Pb age, Guacimal Pluton, Costa Rica, Central American Volcanic Arc
n4:klicoveSlovo
n5:Guacimal%20Pluton n5:Costa%20Rica n5:zircon%20U%E2%80%93Pb%20age n5:mineralogy n5:granitic%20rocks n5:Central%20American%20Volcanic%20Arc n5:geochemistry
n4:kodStatuVydavatele
CZ - Česká republika
n4:kontrolniKodProRIV
[E42D8E6AC625]
n4:nazevZdroje
Journal of Geosciences
n4:obor
n14:DB
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
8
n4:rokUplatneniVysledku
n13:2011
n4:svazekPeriodika
56
n4:tvurceVysledku
Alvarado, Guillermo Košler, Jan Ulloa, Andrés Mixa, Petr Huapaya, Sofia Vondrovicová, Lenka Janoušek, Vojtěch Žáček, Vladimír
n4:wos
000290046200005
s:issn
1802-6222
s:numberOfPages
29
n12:doi
10.3190/jgeosci.087