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Harrisite

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A variety of troctolite in which the large black lustrous olivines have a branching habit of growth and are orientated perpendicular to the layering. These crystals, unlike most large crystals in igneous rocks, grew qucikly after a slowly-cooling magma became supersaturated (over-enriched) in olivine components or was trapped beneath another rock layer.

The matrix to the olivines is composed of highly calcic plagioclase and minor pyroxene.


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Classification of HarrisiteHide

Mineralogy of HarrisiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Plagioclase > AnorthiteCa(Al2Si2O8)
OlivineEquivalent to Fayalite-Forsterite Series; usually a more or less Fe-bearing forsterite.
PyroxeneA petrological term for Pyroxene Group.

Other Language Names for HarrisiteHide

Simplified Chinese:方铜矿

References for HarrisiteHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for HarrisiteHide

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