plutonic rock


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Related to plutonic rock: batholith

plutonic rock

[plü′tän·ik ′räk]
(geology)
A rock formed at considerable depth by crystallization of magma or by chemical alteration.
References in periodicals archive ?
Trace-element variation diagrams highlight some of the similarities and differences among the various plutonic rock units.
Geochronological data for these rocks has not been published so far, and their precise interpretation has been built on lithological correlations and geochronological data from plutonic rocks at the northern extension of this batholiths, which have shown mainly cooling ages that varies between ca.
These rocks have high to very high vein densities and are intensely altered exhibiting propyllitic, sericitic, and potassic assemblages nearing the mineralizing plutonic rocks.
The metaconglomerate is poorly deformed and contains cm-size pebbles of sandstones, pelites, cherts, limestones, plutonic rocks (quartz-diorites, tonalites and granitoids) and volcanic rocks (basalts, andesites, dacites and glass fragments).
The Mira terrane is composed of mainly volcanic and plutonic rocks that form linear northeast-southwest trending belts separated by regional-scale faults and younger sedimentary cover sequences (Fig.
1), which comprises three amphibolite-facies high-strain zones separated by sheets of syn-kinematic plutonic rocks (Lissenberg and van Staal 2002).
Individual plutons are difficult to define because of the tectonic dismemberment of the Bass River block, but three principal plutonic rock types are distinguished: the Frog Lake gabbro/diorite unit, the Debert River granodiorite unit and the McCallum Settlement granite unit (Pe-Piper et al.
The target is associated with a NNE-SSW shear zone where several structures converge forming a complex fault system associated with rare felsic plutonic rocks.
The geology as identified by Geoscience BC indicates a mid-Jurassic assemblage of calc-alkaline plutonic rocks of favourable composition to be mineralised.
A classification of volcanic and plutonic rocks using R1-R2 diagrams and major element analysis-its relationships and current nomenclature.
U-PB LA-ICP-MS GEOCHRONOLOGY AND GEOCHEMISTRY OF JURASSIC VOLCANIC AND PLUTONIC ROCKS FROM THE PUTUMAYO REGION (SOUTHERN COLOMBIA): TECTONIC SETTING AND REGIONAL CORRELATIONS