quartz diorite


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quartz diorite

[′kwȯrts ′dī·ə‚rīt]
(petrology)
A group of plutonic rocks having the composition of diorite but with large amounts of quartz (greater than 20%). Also known as quartz-bearing diorite; tonalite.
References in periodicals archive ?
Copper (gold) ore body I and II that have been found are controlled by both surrounding rock and intermediate-acid rock and are generated in the skarns near the contact zone of quartz diorites and marbles and the cracks of quartz diorite respectively.
This target area contains outcropping quartz vein stockworks with centerline magnetite-pyrite-chalcopyrite, which cut secondary biotite altered quartz diorite porphyry intrusions.
4 Ma) vary in composition with time, from early diorite to quartz diorite to late tonalite and post-mineral andesitic dykes.
The Dickie Brook pluton also consists of three units: leucogabbro to quartz gabbro, diorite to quartz diorite and quartz monzodiorite to monzogranite.
The Ruby Range Batholith is a large plutonic complex which underlies the south and central portion of the claim group, locally composed of quartz diorite, tonalite and granodiorite with lesser amounts of diorite, gabbro and granite.
The lithology of intrusive rocks consists of gabbro, diorite, quartz diorite, granodiorite, biotite granite and leucogranite.
At the Tonglushan deposit, a typical representative of this type, quartz diorite porphyries have intruded gypsum-bearing limestones of the Triassic-age Daye Formation.
Offset dikes consist of a rock called quartz diorite that spread out from the Sudbury Basin like arteries.
Material mined from the Fennell Pit is mainly hard rock in the form of quartz diorite and andesite which requires conventional drilling and blasting.
The composition of this intrusive varies from quartz monzonite through granodiorite to quartz diorite.
The rock consists of both massive and foliated quartz diorite (gneiss).