felsic


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felsic

[′fel·sik]
(mineralogy)
A light-colored mineral.
(petrology)
Of an igneous rock, having a mode containing light-colored minerals.
References in periodicals archive ?
The felsic dykes, are present in the entire Nagar Parkar igneous complex.
Martins Shaft-style mineralisation has been intersected in the felsic dykes.
Lithological sequences of ultramafic to matic, mafic to felsic, and intermediate to felsic compositions have been documented in the well-studied belts (cf.
It comprises mostly red to pink rhyolite porphyry, felsic crystal-rich ash tuff, felsic lithic-crystal tuff and minor microgranite (Johnson 2001a, b).
The basement of southern Jordan is comprised principally of felsic plutonic igneous rocks, with subordinate felsic and basic volcanics, and constitute the northernmost exposed portion of the Arabian-Nubian Shield (ANS).
In this paper, we test the hypothesis that mafic, felsic, and ultramafic blocks in the Hurricane Mountain melange originated from the adjacent Boil Mountain ophiolite complex, and we propose a mechanism for block emplacement in the melange.
These units appear to overlie altered felsic quartz-porphyry exposed along the flanks of Weather Ridge suggesting an associated granitic intrusive system below.
Recent work on the 18 claim (450 hectares) copper property known has the "Shaylee" property have uncovered some very impressive native copper along with globs of massive chalcocite in quartz veins hosted by sericite schist derived from felsic volcanic & epiclastic sediment protholiths.
A broad through-going garnet-chlorite-pyrite surface alteration zone, within felsic volcanic rocks, earlier mapped by the Company is coincident with the Redfox Lake Anomaly, providing strong geological evidence in support of the conductor.
The Bear Showing at the west end of Sharpe Lake, formerly mapped as an older meta-conglomerate and tonalite assemblage, has been recognized and redefined as a younger felsic intrusive bounded on both sides by cataclastic bifurcations of the SWFZ.
85 meter intercept with an average of 40% pyrite in a black chloritic altered felsic tuff, thus explaining the geophysical anomaly.
The underlying geology is comprised of friable carbonaceous argillite overlain by Tertiary felsic tuff and quaternary ash.