porphyrite


Also found in: Encyclopedia.

porphyrite

(ˈpɔːfɪˌraɪt)
n
(Geological Science) another name for porphyry
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Throughout the complex there are sills of gabbro, ultrabasic rocks and dacite porphyrite. The Pechenga complex is divided into Matert (9-1059 m), Zhdanov (1059-2805 m), Zapolyarny (2805-4673 m), Luchlompolo (4673-4844 m), Pirttijarvi (4844-5642 m), Kuvernerinjoki (5642-5717 m), Majarvi (5717-6835 m) and Televi (6835-6842 m) formations (Orlov and Laverov, 1998).
The lower bed of Tatrot is composed of rounded and sub- angular pebbles of pink granite, porphyrite, various quartzites, chert and purple sandstone (Barry et al., 2013).
Svecofennian orogenic rocks are covered with Mesoproterozoic sedimentary Hoglandium conglomerates and mafic (plagioclase porphyrite) and felsic (quartz porphyry) volcanic rocks of rapakivi formation (Koistinen et al.
Near-surface, weathered and partially altered porphyrite (sometimes called "bronzite porphyrite") largely determines the morphology of the region and is the exclusive host rock for the manganese ore veins, which have never been observed to penetrate surrounding sedimentary rocks.
2 lens and concluded that they "have developed through mineralization and silicification of schistose zones in the altered porphyrite or greenstone near its contact with the argillites".
The dark grey porphyritic basalt (plagioclase porphyrite) underlying the quartz-feldspar porphyry in the Undva drill core in the northern part of the batholith contains 3-10 vol% light-coloured euhedral plagioclase phenocrysts ([An.sub.40-50]) that are usually 2-3 mm, rarely up to 4-5 cm, in length.
and Konta, J.: 1951, Diorite porphyrite near Divci Kopy, Kamenice nad Lipou, Sbor.
The next blasting focused on monitoring the seismic impact on diorit porphyrite bearing in the Maglovec quarry was a bench blasting Nr.
Near Asbestos, he recognized that the peridotite, chromite-beating dunite, pyroxenite, gabbro, diabase, porphyrite, hornblende granite, and aplite are all parts of a thick sill.