magmatic rock


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magmatic rock

[mag′mad·ik ′räk]
(petrology)
A rock derived from magma.
References in periodicals archive ?
Early-Middle Jurassic (180-200 Ma) magmatic rocks also have been found in other segments of the Colombian Andes (FIGURE 1), including the Santander and Santa Marta massifs (Altenberger and Concha, 2005; Cardona et al.
Within the frame of the above mentioned project some experiments have been made on several kinds of magmatic rocks.
The relatively rare sphene shows a higher content of Al in comparison with sphene from magmatic rocks (see Ribbe 1982).
Nevertheless, exploration of massifs of magmatic rocks shows amazing constancy of their composition in vast areas.
It is a pity that continental geologists' ideas about the advantages of offset drilling over super deep drilling for studying crustal magmatic rocks was given no priority by the ODP Planning Committee.
Following an introduction reviewing igneous nomenclature, each chapter addresses a specific compositional category of magmatic rocks, covering definition, mineralogy, eruption/ emplacement processes, textures and crystallization processes, geotectonic distribution, geochemistry, and aspects of magma genesis.
The Rb and Sr isotopic analysis of the gold-bearing mineral (pyrite), the carbonate minerals in gold ores, the contemporary magmatic rocks with gold mineralization and basement metamorphic rocks from the typical gold deposits, suggested that the Rb and Sr isotopic compositions of the gold ore minerals were similar with that of the mantle-derived magmatic rocks, and had a certain connection with that of the basement metamorphic rocks and the contemporary magmatic rocks with gold mineralization, which indicated that the ore-forming materials of the gold deposits were of multi-sources, including contemporary magmatic rocks, basement metamorphic rocks, and mantle-derived magma.
While the nature of this Cambro-Ordovician igneous event is still poorly understood, it is clear that the Hf isotopes can provide further insight into the petrogenesis of the magmatic rocks associated therewith.
This local name was given to unusual textured magmatic rocks of largely dioritic and granodioritic composition occurred in area of the Marktredwitz.
2006), the later considered the spatial and particularly broader distribution of the Jurassic magmatic rocks (Maze, 1984; McCourt et al.
Very few proper age data are available from post-orogenic magmatic rocks of the Estonian basement.