NORMATIVE-MINERALOGICAL CLASSIFICATION OF ULTRAMAFITES OF THE MEZOZOIC OPHIOLITES OF ARMENIA
DOI:
https://doi.org/10.46991/PYSU:C/2010.44.1.011Keywords:
Oceanic Mantle Harzburgites, Armenian ophiolites, ultramafites of Armenia, serpentinization, Opx–Ol–Cpx diagram, lherzolites, pyroxenites, wehrlites, gabbroAbstract
The article deals with CIPW norm calculation of ultramafites of Armenia for revealing their initial mineralogical composition, which is masked by their total serpentinization. According to the IUGS International Terminological Commission classification by modern Opx–Ol–Cpx diagram (1991), the Oceanic Mantle Harzburgites dominates among the ultramafites of Armenia, what is peculiar for the HOT type ophiolites, formed in the fast spreading conditions. It is also cleared up that dunites with podiform cromite mineralization, lherzolites, wehrlites, pyroxenites and a various gabbro belong to the cumulative complex of the Armenian ophiolites.
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