Early Cretaceous Surtseyan volcanoes of the Baño Nuevo Volcanic Complex (Aysén Basin, Eastern Central Patagonian Cordillera, Chile)

A. Demant, M. Suárez, R. de la Cruz, O. Bruguier

Resultado de la investigación: Article

4 Citas (Scopus)

Resumen

Tens of Surtseyan tuff cones are exposed in the Río Coichel valley, between Ñireguao and Estancia Baño Nuevo (Southern Chilean Andes). The Early Cretaceous products of the submarine eruptions rest on, or are interbedded with, shallow marine sandstones of the Hauterivian-early Aptian Apeleg Formation. The Early Cretaceous rocks typically contain large amphibole phenocrysts, clinopyroxene and plagioclase, and have compositions that range from relatively primitive basalts to andesites. The basalts are slightly enriched in LREE and incompatible trace elements. They have low Ti-contents and negative anomalies in Nb and Ta, characteristic of subduction-related magmas. Centimetre-sized amphibole megacrysts and an amphibole-bearing clinopyroxenite xenolith have been found in one of the tuff cones located near Estancia Baño Nuevo. The amphibole megacrysts are pargasite (low Si and Ti, high Mg). The xenolith has diopsidic clinopyroxene with abundant inclusions, and pargasite veins enclosing smaller clinopyroxene neoblasts. Geochemical data show that the megacrysts and the xenolith have the same origin and correspond to underplated igneous bodies crystallized at high pressure.

Idioma originalEnglish
Páginas (desde-hasta)207-219
Número de páginas13
PublicaciónGeologica Acta
Volumen8
N.º2
DOI
EstadoPublished - 2010

Huella dactilar

cordillera
amphibole
xenolith
volcano
clinopyroxene
Cretaceous
pargasite
tuff
basin
basalt
Hauterivian
Aptian
andesite
plagioclase
subduction
volcanic eruption
sandstone
trace element
anomaly
valley

ASJC Scopus subject areas

  • Geology

Citar esto

@article{af9be4b3e7444fdb9baa0924d7c5c2c0,
title = "Early Cretaceous Surtseyan volcanoes of the Ba{\~n}o Nuevo Volcanic Complex (Ays{\'e}n Basin, Eastern Central Patagonian Cordillera, Chile)",
abstract = "Tens of Surtseyan tuff cones are exposed in the R{\'i}o Coichel valley, between {\~N}ireguao and Estancia Ba{\~n}o Nuevo (Southern Chilean Andes). The Early Cretaceous products of the submarine eruptions rest on, or are interbedded with, shallow marine sandstones of the Hauterivian-early Aptian Apeleg Formation. The Early Cretaceous rocks typically contain large amphibole phenocrysts, clinopyroxene and plagioclase, and have compositions that range from relatively primitive basalts to andesites. The basalts are slightly enriched in LREE and incompatible trace elements. They have low Ti-contents and negative anomalies in Nb and Ta, characteristic of subduction-related magmas. Centimetre-sized amphibole megacrysts and an amphibole-bearing clinopyroxenite xenolith have been found in one of the tuff cones located near Estancia Ba{\~n}o Nuevo. The amphibole megacrysts are pargasite (low Si and Ti, high Mg). The xenolith has diopsidic clinopyroxene with abundant inclusions, and pargasite veins enclosing smaller clinopyroxene neoblasts. Geochemical data show that the megacrysts and the xenolith have the same origin and correspond to underplated igneous bodies crystallized at high pressure.",
keywords = "Amphibole, Aptian, Geochemistry, Hydrovolcanism, Megacryst, Patagonian andes",
author = "A. Demant and M. Su{\'a}rez and {de la Cruz}, R. and O. Bruguier",
year = "2010",
doi = "10.1344/105.000001530",
language = "English",
volume = "8",
pages = "207--219",
journal = "Geologica Acta",
issn = "1695-6133",
publisher = "Universitat de Barcelona",
number = "2",

}

Early Cretaceous Surtseyan volcanoes of the Baño Nuevo Volcanic Complex (Aysén Basin, Eastern Central Patagonian Cordillera, Chile). / Demant, A.; Suárez, M.; de la Cruz, R.; Bruguier, O.

En: Geologica Acta, Vol. 8, N.º 2, 2010, p. 207-219.

Resultado de la investigación: Article

TY - JOUR

T1 - Early Cretaceous Surtseyan volcanoes of the Baño Nuevo Volcanic Complex (Aysén Basin, Eastern Central Patagonian Cordillera, Chile)

AU - Demant, A.

AU - Suárez, M.

AU - de la Cruz, R.

AU - Bruguier, O.

PY - 2010

Y1 - 2010

N2 - Tens of Surtseyan tuff cones are exposed in the Río Coichel valley, between Ñireguao and Estancia Baño Nuevo (Southern Chilean Andes). The Early Cretaceous products of the submarine eruptions rest on, or are interbedded with, shallow marine sandstones of the Hauterivian-early Aptian Apeleg Formation. The Early Cretaceous rocks typically contain large amphibole phenocrysts, clinopyroxene and plagioclase, and have compositions that range from relatively primitive basalts to andesites. The basalts are slightly enriched in LREE and incompatible trace elements. They have low Ti-contents and negative anomalies in Nb and Ta, characteristic of subduction-related magmas. Centimetre-sized amphibole megacrysts and an amphibole-bearing clinopyroxenite xenolith have been found in one of the tuff cones located near Estancia Baño Nuevo. The amphibole megacrysts are pargasite (low Si and Ti, high Mg). The xenolith has diopsidic clinopyroxene with abundant inclusions, and pargasite veins enclosing smaller clinopyroxene neoblasts. Geochemical data show that the megacrysts and the xenolith have the same origin and correspond to underplated igneous bodies crystallized at high pressure.

AB - Tens of Surtseyan tuff cones are exposed in the Río Coichel valley, between Ñireguao and Estancia Baño Nuevo (Southern Chilean Andes). The Early Cretaceous products of the submarine eruptions rest on, or are interbedded with, shallow marine sandstones of the Hauterivian-early Aptian Apeleg Formation. The Early Cretaceous rocks typically contain large amphibole phenocrysts, clinopyroxene and plagioclase, and have compositions that range from relatively primitive basalts to andesites. The basalts are slightly enriched in LREE and incompatible trace elements. They have low Ti-contents and negative anomalies in Nb and Ta, characteristic of subduction-related magmas. Centimetre-sized amphibole megacrysts and an amphibole-bearing clinopyroxenite xenolith have been found in one of the tuff cones located near Estancia Baño Nuevo. The amphibole megacrysts are pargasite (low Si and Ti, high Mg). The xenolith has diopsidic clinopyroxene with abundant inclusions, and pargasite veins enclosing smaller clinopyroxene neoblasts. Geochemical data show that the megacrysts and the xenolith have the same origin and correspond to underplated igneous bodies crystallized at high pressure.

KW - Amphibole

KW - Aptian

KW - Geochemistry

KW - Hydrovolcanism

KW - Megacryst

KW - Patagonian andes

UR - http://www.scopus.com/inward/record.url?scp=78650820398&partnerID=8YFLogxK

U2 - 10.1344/105.000001530

DO - 10.1344/105.000001530

M3 - Article

AN - SCOPUS:78650820398

VL - 8

SP - 207

EP - 219

JO - Geologica Acta

JF - Geologica Acta

SN - 1695-6133

IS - 2

ER -