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Harrisite

A rock subtype
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About HarrisiteHide

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 quickly 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.

Note that the name Harrisite (after Dana) has also been used for pseudomorphs of chalcocite or djurleite after galena.


Unique IdentifiersHide

Mindat ID:
40726
Long-form identifier:
mindat:1:1:40726:3
GUID
(UUID V4):
b55dac74-db57-4bc7-a1a7-8e01561a00cc

Classification of HarrisiteHide

QAPF_P_10.png

Gabbro is in section 10 of the QAPF diagram.


Mineralogy of HarrisiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Plagioclase > AnorthiteCa(Al2Si2O8)
OlivineCommonly used as a synonym for a member of the Fayalite-Forsterite Series, but more generally and properly ...
PyroxeneA petrological term for Pyroxene Group.

Other Language Names for HarrisiteHide

Simplified Chinese:方铜矿

Internet Links for HarrisiteHide

References for HarrisiteHide

 
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