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granodiorite |
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granodioriteMedium- to coarse-grained rock that is one of the most abundant intrusive rocks. It contains quartz and is distinguished from granite by having more plagioclase feldspar than orthoclase feldspar; its other mineral constituents include hornblende, biotite, and augite. Granodiorite is similar to granite in appearance but darker. granodiorite [¦gra·nō′dī·ə‚rīt] (petrology) A visibly crystalline plutonic rock composed chiefly of sodic plagioclase, alkali feldspar, quartz, and subordinate dark-colored minerals. 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 poly-metallic veins, skarns, and replacement deposits occur in the district, usually associated with intrusive masses of granodiorite plutons and dikes. According to the preliminary geology report prepared by Duncan Bain, certified professional geologist and Director of Tao Minerals, the Camelia project is composed of Dagua Group Upper Cretaceous quartzites and siliceous siltstones intruded by a granodiorite plug and contains a wide mineralization zone. north of the Diamond Hitch zone, where an auriferous quartz vein is hosted within a granodiorite intrusion. |
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