plutonic rock


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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 ?
A representative range of pristine to moderately altered volcanic and plutonic rocks were collected (65 in total) in the Huntington Mountain area.
The ultramafic rocks are confined to a thrust slice of the Annieopsquotch ophiolite belt that is bounded by the northwestern shear zone of the Lloyds River Fault Zone, and is separated from the main ophiolitic bodies by plutonic rocks that intruded the Lloyds River Fault Zone syn-kinematically (Fig.
1996a) interpreted the sequence in the Bass River block as having formed by tectonic accretion at a convergent plate margin, with the plutonic rocks emplaced along shear zones during oblique convergence.
Late Neoproterozoic plutonic rocks in the southeastern highlands display telescoping of units (Farrow and Barr 1992, Grecco and Barr 1999), with increasingly greater amounts of uplift toward the northwest.
1982) divided plutonic rocks of the Kellys Mountain area into two main units, leucogranite (now termed Kellys Mountain Granite; Fig.
Two samples of the plutonic rocks plot in the gabbro --norite field of the R1-R2 diagram.
1989, Mineral chemistry of ultramafic and mafic plutonic rocks of the Appalachian ophiolites, Quebec, Canada: Chemical Geology, v.
The object of this paper is to explore ways in which grey plutonic rocks of similar appearance can be distinguished, and to examine the implications for Mons Claudianus.
A new gold prospect was found in exposures of oxidized veins within intensely altered plutonic rocks along Quartz Creek at the north end of the claims.
The mainly Neoproterozoic sedimentary, volcanic, and plutonic rocks and overlying Cambrian-Ordovician sedimentary rocks of Avalonia experienced a period of tectonic quiescence until a tectonothermal event in the Silurian-Devonian, evidence for which is preserved in rocks in parts of Avalonia in New Brunswick and northern mainland Nova Scotia (e.
The geology of the belt is dominated by Triassic, Jurassic and Cretaceous sediments and volcanics, and Mid-Tertiary plutonic rocks, calc-alkaline volcanic rocks and sub-volcanic porphyritic intrusions.