Parental melts of melilitolite and origin of alkaline carbonatite: evidence from crystallised melt inclusions, Gardiner complex
Article Abstract:
Crystallite melt inclusions have been found in perovskite and mililite crystals derived from melilitolites of the ultramafic alkaline Gardiner complex. The melilitite inclusions have a homogenization temperature similar to liquidus temperatures of natural melilitites, while low-alkali carbonatite inclusions' homogenization temperature is similar to that of calcite carbonatite dykes taken from the melilitolite magma. Finally, the homogenization temperature of natrocarbonatite inclusions have been found to be similar to that of natrocarbonatite lava from Oldoinyo Lengai.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1997
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Clinopyroxene + liquid equilibria to 100 kbar and 2450 K
Article Abstract:
Expressions of clinopyroxene + liquid equilibria were constructed from least-squares regression analysis of experimental clinopyroxene + liquid pairs over wide ranges of pressure and temperature to examine alternative hypotheses for the origin of igneous rocks. The pressure range was from 0 to 100 Kbar, while the temperature range was 1350 K to 2450 K. The least-squares regression models were found to generate relatively accurate calibration data and yield more precise estimates of clinopyroxene compositions than non-linear regression methods.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1999
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