There are also pink and red aplite veins in the igneous complexes up to 5 cm wide.
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Aplite dikes are fine grained or sugary textured intrusives of granitic composition.
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The aplite is the lowest melting remanent of the granite magma, that is poor in volatiles.
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The dykes included a swarm of dolerite dykes, also lamprophyre, feldspar porphyry and aplite.
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The aplite minerals include tourmaline, topaz and fluorite.
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Intrusions vary widely, from mountain range sized batholiths to thin vein-like fracture fillings of aplite or pegmatite.
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More examples
Light-colored and fine-grained granitic rock consisting chiefly of quartz and feldspars
(aplitic) of or related to aplite
Aplite in petrology, the name given to intrusive rock in which quartz and feldspar are the dominant minerals. Aplites are usually very fine-grained, white, grey or pinkish, and their constituents are visible only with the help of a magnifying lens. ...
Merely a fancy geology word for a fine-grained, biotite-poor granite with a sugary texture that commonly forms tabular intrusions (dikes and sills).
Generally refers to a dyke rock made almost entirely of light-coloured minerals and with a characteristic fine-grained granitic texture.