Diorite (+Dacite) (igneous rock), Romania3D ModelNoAI
Locality: Gutâi Mts., Romania
Size: 9 cm x 7 cm x 4 cm
Type: Igneous intrusive (plutonic) rock
Description: Phaneritic granular rock composed of essential sodic-plagioclase (usually oligoclase or andesine) and usually a mafic such as hornblende, or more rarely, biotite and/or pyroxene. From Gk. diorizein, to distinguish; because essential minerals are megascopic. According to IUGS, diorite is a plutonic rock with 0-5 Q, P/(A + P) greater than 90%, and plagioclase more sodic than An50. The current sample is a xenolith in a dacitic dike-like body. The contact between diorite and dacite can be seen in this sample.
Essential minerals: plagioclase, hornblende, pyroxene, biotite.
Accessory minerals: magnetite, ilmenite, apatite, rutile, zircon, orthoclase, etc.
Website: http://geology.uaic.ro/muzee/mineralogie/
Concept & 3D-modelling by dr. Andrei Ionut APOPEI
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