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diorite

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diorite

Igneous rock intermediate in composition between mafic (consisting primarily of dark-coloured minerals) and felsic (consisting primarily of light-coloured minerals) – the coarse-grained plutonic equivalent of andesite. Constituent minerals include feldspar and amphibole or pyroxene with only minor amounts of quartz.



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? Mentioned in ? References in periodicals archive
 
Offset dikes consist of a rock called quartz diorite that spread out from the Sudbury Basin like arteries.
Sudbury camp still going strong for Pele Mountain by Louiseize, Kelly / Northern Ontario Business
From 97m to 104m depth oxidized and strongly mineralized hydrothermal quartz-breccia and diorite porphyry was intersected underlain by a weakly mineralized, late-mineral diorite dyke to a depth of 211m.
Philex Gold Announces Results of Infill Drill Holes at the Boyongan ... by Business Wire
has identified Pele's Levack property as being a quartz diorite dike.
Pele Mountain gaining momentum by Northern Ontario Business
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