harzburgite


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Related to harzburgite: Lherzolite, dunite, eclogite

harzburgite

[′härts‚bər‚gīt]
(petrology)
A peridotite consisting principally of olivine and orthopyroxene.
References in periodicals archive ?
1990, Harzburgites and refractory melts in the Lewis Hills massif, Bay of Islands ophiolite complex: The base-metals and preciousmetals story: The Canadian Mineralogist, v.
The presence of G10 and DI chromites support the conclusion that this kimberlite sampled a potentially diamond bearing depleted harzburgite and eclogite in the mantle on the way to surface.
Inside the serpentinites still traces of Pridotites of Harzburgite and sometimes Lherzolite combination is observed in the form of floating pieces.
What resulted from the field and mineralogy studies is that the Serpentinisation phenomenon of the Pridotite rocks of Harzburgite type has played role in formation of some ores including Magnesite and Hontite.
The ultramaphic rocks include Dunites, Harzburgites, lherzolites, Verlites and Pyroxenite that transform into Serpentine due to the erosion under certain climatic conditions and oxidation environment.
Harzburgites are vast and huge green masses which have been serpentinized to a limited degree and have relationship with the fault peripheral serpentinized Pridotites.
5 Lake of the Metapyroxenite, Tr+Chl+Tlc Hills harzburgite 6 Padille Pond Lherzolite, harzburgite Relic O1+Cpx; Srp+Car+Tr+Chl 7 Lloyds River Dunite Ol+Tr 8 Dennis Pond Serpentinite, Ol+Srp+TIc+Car+Cr+Chl; metagabbro Hbl+Ep+Zo+Chl# 9 Three Ponds Serpentinite, Srp+Tlc+Chl+Car; metagabbro Hbl+Ep+Zo+Qtz# 10 North Fischells Serpentinite, Srp+Chl+Tr+TIc; Brook metagabbro Pl+Hbl+Qtz# 11 Long Range Harzburgite, Ol+Opx+Tlc+Tr Complex lherzolite, pyroxenite, gabbro # (a) Location Exposed contact Source relationships 1 Puddle Pond Cut by granite of This study; Dunning and presumed Silurian age Herd (1980) 2 John's Brook Cut by granite of This study; Dunning and Lake gabbro presumed Silurian age Chorlton (1985) 3 Whaleback Surrounded by ca.
1), comprises gabbro, pyroxenite, and relatively homogeneous harzburgites (mantle tectonite?
Clinopyroxene -- melt thermobarometry shows that Cr-diopside -- type 2 glass pairs in harzburgite formed at 1.
The serpentinite-Ellsworth contact is sheared, and the serpentinite has a harzburgite protolith with elongate orthopyroxene grains.
Orthopyroxene and clinopyroxene geothermobarometers indicate a harzburgite chemistry for some mineral separates and also that the postulated geotherm for the intrusive history of the dykes is permissive of diamond stability.