aplite


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aplite

[′a‚plīt]
(petrology)
Fine-grained granitic dike rock made up of light-colored mineral constituents, mostly quartz and feldspar; used to manufacture glass and enamel.
References in periodicals archive ?
They range from micogranite (abundant) to aplite, pegmatite and quartz porphyry, but the latter two are rare.
US Silica Holdings (NYSE:SLCA) declared on Wednesday that it is raising the prices for the majority of its non-contracted silica sand and aplite products in the range from 4% to 6%, depending on the grade.
The Ruby silver mine, associated with an outcropping aplite dyke, has a lode up to 1.
Mineralization included quartzcalcite-pyrite-chalcopyrite-bismuthinite veinlets associated with an aplite dike in sericite-altered granodiorite.
In the Tarryall Range, Park County, miarolitic pockets in aplite dikes have long been known for occasionally yielding good topaz, either as loose single crystals or in specimens showing topaz crystals resting on smoky quartz crystal faces.
The mineralization is associated with quartz-tourmaline veins and aplite dykes that intrude mafic metavolcanic rocks of the Yukon-Tanana Terrane.
Biotite in the A-type Graniteville Granite was locally concentrated during aplite formation, resulting in schlieren.
Surface samples include up to 19 g/t Au in tourmalinized aplite and quartz stockworks.
The outcrop area is covered by 1) isolated remnants of the basement 2) porphyritic granite 3) quartz monzonite 4) dykes and veins of microgranite aplite and rhyolite and 5) mafic dykes.
The highest level dyke samples exhibit microcrystalline texture consisting of intergrown fibrolites rimming quartz and feldspar phenocrysts, reflecting greater degrees and rates of supercooling or devitrification (Stirling 1981; MacLellan and Trembath 1991), akin to aplite.