ultramafic


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Related to ultramafic: Intermediate Rock

ultramafic

[¦əl·trə′maf·ik]
(petrology)
Referring to igneous rock composed principally of mafic minerals, such as olivine and pyroxene.
References in periodicals archive ?
The eastern segment contains mafic to ultramafic volcanic and intrusive rocks, and is part of the Eastern Goldfields Granite Greenstone Terrane.
This survey will be extended to the Fish Hook prospect, where a nickel-copper sulphide anomaly has been identified with a magnetic feature that is interpreted to represent mineralised ultramafics.
Note on tremolite zone from the extension of Shkakote-Qila Ultramafic complex in Utmankhel, Mohmand Agency.
Ultramafic rocks in Gabal El-Rubshi, Central Eastern Desert, Egypt: petrography, mineral chemistry, and geochemistry constraints.
It is highly likely that this prase opal was found in the same belt of metamorphosed ultramafic rocks that, from Haneti, are aligned in a north-westerly direction along regional shear zones.
Hamiguitan is surrounded by forest land, including a bonsai field or "pygmy" forest of 100yearold trees on ultramafic soil.
Correlation parameters laterite heavy metals Cr, Fe, Mn, Co and laterisasi closely related to ultramafic rocks, it is easy for the assay data processing and properties of an element geochemistry.
"The volcanic rock formations including the Samail ophiolite (a large slab of oceanic crust that is made of volcanic rocks and ultramafic rocks from the Earth's upper mantle, which was thrust onto the continental crust as an ophiolite) in the eastern part of Oman contains significant copper-gold volcanic-associated massive sulphide mineralisation," he stated.
Geological formations which are observed in the study area include (Figure 2) schists, limestones, volcano-sedimentary formations, chromiferous iron ore occurrences, ultramafic rock masses, flysch, conglomerates, marly limestones with travertines, marly formations with lignite intercalations, and alluvial deposits [23-25].
Highly Mg ultramafic rocks occupy vast regions in Serbia (3000 km2).