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Related to porphyritic: groundmass, Pegmatitic Texture


 (pôr′fə-rĭt′ĭk) also por·phy·rit·i·cal (-ĭ-kəl)
1. Of or containing porphyry.
2. Containing relatively large isolated crystals in a mass of fine texture.

[Middle English porphiritike, from Medieval Latin porphyrīticus, from Greek porphyrītikos, from porphyrītēs, porphyry; see porphyry.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Geological Science) (of rocks) having large crystals in a fine groundmass of minerals
2. (Geological Science) consisting of porphyry
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Adj.1.porphyritic - (of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals
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References in classic literature ?
The soil, in fact, was bestrewn with quartz and porphyritic rocks.
The current geological model for the Santana project area has identified that gold mineralization is related to a series of hydrothermal breccias (approximately 300-500m in diameter or greater) hosted by the copula of batholithic intrusions, porphyritic stocks and by roof pendants of their volcanic host rocks.
Detailed geologic mapping of the disseminated sulphidized porphyritic intrusion areas as directed in-field
Chile has been for centuries a territory of vast mining activity, with massive deposits of porphyritic type concentrated in the northern sector of the territory.
Main lithologies are a porphyritic dacite surrounded by a coarse-grained granodiorite.
At the same time, in order to reduce the complexity of the DEM micromechanical parameter calibration, we selected three kinds of rock as shown in Table 1 (number 2 porphyritic granodiorite, number 3 granodiorite, and number 10 granodiorite porphyry) as the calibration objects.
The lithology is made up of lateritic duricrust terranes, migmatites and gneisses (ortho), schist referred to as the Lom Schist belt (Figure 3(c)), metaleucogranites, meta-granodiorites, porphyritic granites (Figure 3(b)), fine grained granites, and some pegmatite veins [1].
The Cenozoic magmatism is characterized by the formation of monzogranite, leucogranite, diorite, porphyritic diorite, and aplite units [84, 85].
Quite common in basic and ultrabasic rocks, Co is a rare metal existing in porphyritic igneous rocks in small quantities (Dixon, 2012).
The first phase is coarse-grained porphyritic biotite granites, amphibole-biotite granites, granosyenites, granodiorites.