quartz porphyry

quartz porphyry

[′kwȯrts ′pȯr·fə·rē]
(petrology)
A porphyritic extrusive or hypabyssal rock containing quartz and alkali feldspar phenocrysts embedded in a microcrystalline or cryptocrystalline matrix. Also known as granite porphyry.
References in periodicals archive ?
It encompasses the majority of the land within EPM 15654 including all current drill targets including those to the north and south of the Iron Glen Pit, the quartz porphyry area to the west of the pit and the new Lead Belly discovery to the north west of the pit area.
Two holes have intersected mineralization consistent with the type of quartz porphyry system anticipated in the geological model of the area created by Callinan.
The different zones are strong propylite, argillic, sericitic and potassic (biotite) alteration hosted in a biotite, feldspar quartz porphyry.
Optimization of mill operating parameters continues with the goal of initiating pilot scale testing of the primary Quartz porphyry composite in November.
Diamond drill results confirm significant gold/copper mineralization along the margin of a buried quartz porphyry stock.
Recent analyses by IGMI's Consulting Geologist, Dan Robertson determined that the mineralization represents a skarn zone between sediments and quartz porphyry.
36% copper (including the high grade intercept above) in altered rhyolitic quartz porphyry and lapilli tuff.
This intersection occurs within the main ore horizon (lower quartz porphyry unit), which hosts the Callinan Mine.
The Company will complete as many holes as necessary to outline and determine the size and quality of the mineralization and to locate and further define any additional mineralization which results from drill testing anomalies indicated by the borehole pulse EM survey, including the three off-hole anomalies which occur in the upper quartz porphyry unit.
Gold mineralization occurs in quartz tourmaline ankerite veins located at the contact of ultramafic and mafic rocks as well as quartz porphyry intrusive hosted mineralization.