Other
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.2375k&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, Sept. 1990, p. 2375-2388.
Other
61
Barometers, Calcium, Olivine, Peridotite, Fluorescence, Isotopes, Mineralogy, Spinel
Scientific paper
The equilibrium Ca content of olivine coexisting with clinopyroxene was determined (using an electron microprobe) in natural lherzolitic compositions Mg/(Mg + Fe)ol of about 0.9, in experiments covering lherzolitic systems from 2-60 kb and 900-1400 C. The boundary fluorescence effect was avoided by collecting analytical data from separated mineral grains. The experimental data on Ca solubility were fitted to two equations given in the form of barometers. It was found that calculated P,T conditions for spinel peridotite nodules from southwestern USA, fell within the spinel stablity field and along predicted geotherms for this region.
Brey Gerhard P.
Koehler T. P.
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