Mineralogy of vesicles in an olivine leucitite at Cosgrove, Victoria, Australia
- 1 March 1980
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 43 (329), 597-603
- https://doi.org/10.1180/minmag.1980.043.329.06
Abstract
Summary: An olivine-titanomagnetite-apatite-clinopyroxene-mica-nepheline-feldspar assemblage occurs in late-stage vesicles in a small outcrop of olivine leucitite at Cosgrove, Victoria. The vesicles were formed by exsolution of volatiles at an early stage in the cooling history of the lava. Subsequently, a volatile-rich residual liquid filled cavities and fractures, giving rise to a coarse-grained pegmatoid rock type similar in over-all mineralogy to the vesicles. The volatiles facilitating crystallization in both the vesicles and the pegmatoid were probably enriched in F, CO2, and P. A number of geothermometers applied to the vesicle assemblage failed to agree on likely crystallization temperatures.Keywords
This publication has 9 references indexed in Scilit:
- Plagioclase-alkali-feldspar geothermometry revisitedMineralogical Magazine, 1977
- On the behaviour of fluorine and chlorine during magmatic differentiationContributions to Mineralogy and Petrology, 1977
- Mineralogical note the occurrence of a leucite‐bearing lava at Cosgrove, VictoriaJournal of the Geological Society of Australia, 1976
- Petrology of the leucite‐bearing lavas in New South Wales∗Journal of the Geological Society of Australia, 1973
- Partitioning of Chloride Between a Silicate Melt and Coexisting Aqueous Phase from 2 to 8 KilobarsEconomic Geology, 1972
- Fluorine-hydroxyl exchange in apatite and biotite: A potential igneous geothermometerContributions to Mineralogy and Petrology, 1971
- Phonolite globules in basanite from Kiandra, AustraliaLithos, 1970
- Mineral Equilibria in the System Nepheline-Alkali Feldspar-Plagioclase and their Petrological SignificanceJournal of Petrology, 1968
- Nephelines as Crystallization Temperature IndicatorsThe Journal of Geology, 1961