The MGC composed of yttrium aluminum garnet ([Y.sub.3][Al.sub.5][O.sub.12]; YAG) and corundum ([Al.sub.2][O.sub.3]) with granophyric
texture is one of the most well known MGC materials.
Quartz and alkali feldspar are locally intergrown in a granophyric
texture within a mosaic of polygonal, equigranular crystals of quartz and alkali feldspar.
The granite displays medium-grained, hypidiomorphic to, less commonly, allotriomorphic, subequigranular to equigranular, and sparingly granophyric
The rock compounds of the area include: granite, granodiorite, monzonite and diorite with identified granular, porphyritic and granophyric
texture in microscopic thin section.
Fine globules and worm-like patches of quartz also occur in association with and within perthite grains forming myrmekite or granophyric
The initial mapping conducted late 2010 and early 2011 on Treasure Island identified a granophyric
horizon in a dolerite/gabbro package of rocks, which indicated an environment with the right rock types, similar to that found further north in the belt at Kambalda and Kalgoorlie.
This petrographic feature is also observed as an interstitial granophyric
intergrowth, and occurs plagioclase and clinopyroxene crystals with intergranular arrangement, in association with K-feldspar and quartz.
A primary three-phase fluid inclusion assemblage contained within growth-zoned quartz crystals in the granophyric
phase of the Nipissing diabase was chosen as representative of the highest temperature fluids responsible for ore deposition at Cobalt.
The groundmass is granophyric
, partly spherulitic, and contains miarolitic cavities.
The Redstone Mountain Granite comprises at least two phases, including pink to red, medium-grained, equigranular to subporphyritic biotite-amphibole granite containing sparse quartz phenocrysts and white plagioclase phenocrysts set in a fine-grained granophyric
It is medium-grained and hypidiomorphic but locally granophyric
. Some of the plagioclase grains surround the perthite in rapakivi fashion.
From our initial mapping we identified a granophyric
horizon in a dolerite/gabbro package of rocks which indicated that we have the right rock types, similar to that found further north in the belt at Kambalda and Kalgoorlie.