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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
 
All five holes of the program have been completed and have confirmed that mineralization, including visible gold in some holes, occurs in association with stockwork-type quartz sulphide veining within albitized diorites developed along north-south trending structural corridors.
Committee Bay Resources Ltd.: High-Grade Gold Results Confirm ... by Business Wire
In total 1,641m in 12 RC holes tested for extensions to known mineralized diorites and infilled areas within the inferred resource.
Committee Bay Resources Ltd.: Reverse Circulation Drill Program ... by Business Wire
The porphyritic diorites are potassically altered with variable development of quartz veining and associated malachite, azurite, cuprite, pitch limonite and native copper mineralization and persisted to hole end at 500 metres depth.
Philex Gold Announces Updated Drilling Results At the Buyongan ... by Business Wire
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