Open AccessLiquidus thermobarometer for the modeling of chromian spinels - melt equilibrium: method and verification
Author(s) -
N. S. Aryaeva,
E. V. Koptev–Dvornikov,
Д. А. Бычков
Publication year - 2016
Publication title -
vestnik moskovskogo universiteta. seriâ 4, geologiâ
Language(s) - English
Resource type - Journals
ISSN - 0579-9406
DOI - 10.33623/0579-9406-2016-4-30-39
Subject(s) - liquidus , spinel , silicate , thermodynamics , basalt , slag (welding) , mineralogy , solubility , geology , materials science , chemistry , metallurgy , geochemistry , physics , alloy , organic chemistry
A system of equations of thermobarometer for Cromian spinel - silicate melt equilibrium was obtained by multiple linear regression of 234 experimental data of the solubility of chromian spinels in basaltic melts. Equation reproduces with small error experimental data in a wide range of basalt compositions, temperatures and pressures. Verification of thermobarometers showed the maximum error in liquidus temperature reproducing does not exceed ±12 °C. The level of cumulative Cr-spinels appearance in the vertical structure of Burakovsky intrusion predicted with the error ±50 m.