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aplite |
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apliteor hapliteAny igneous rock of simple composition, such as granite composed only of alkali feldspar, muscovite mica, and quartz; in a more restricted sense, uniformly fine-grained (less than 0.08 in., or 2 mm), light-coloured igneous rocks that have a characteristic granular texture. Unlike pegmatite, which is similar but much coarser-grained, aplite occurs in small bodies that rarely contain zones of different minerals. The two rocks may occur together and are assumed to have formed at the same time from similar magmas. 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Numerous aplitic leucogranite dykes ranging from 40 cm to 5 m in width, occur on the property, mostly within the schist. The sulphide is contained in irregular bodies of skarn, developed in marble and calcareous sediments near their contact with a porphyritic, aplitic intrusive. |
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