Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?
Article Abstract:
The kornerupine + talc assemblage is reportedly in rocks in six localities worldwide. However, textural relationships, only at Chilapila Hill in the Lufilian Arc, Zambia, suggest that Krn equilibrated with Tlc during a metamorphic event. The stability range of Krn + Tlc in P-T space was determined and Krn + Tlc associations compared, while chemical factors that could affect the stability of Krn + Tlc in relation to tourmaline + orthoamphibole were also analyzed. Results indicate that the Krn + Tlc assemblage could be more significant in B-bearing whiteschists than so far reported.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1998
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Phase relationships in Buchan facies series pelitic assemblages: calculations with application to andalusite-staurolite parageneses in the Mount Lofty Ranges, South Australia
Article Abstract:
Andalusite-staurolite parageneses in Mount Lofty Ranges, Australia can be used to determine regional metamorphism of pelitic rocks. Spatial distribution and mineral chemical variation of andalusite-staurolite formations gave similar results as those with calculations involving petrogenetic grids and pressure-temperature conditions of metamorphic rocks. The pressure-temperature grid and other variables involved in metamorphic zonation are useful in obtaining data sets that resemble those taken naturally.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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High-density CO2-N2 inclusions in eclogite-facies metasediments of the Munchberg gneiss complex, SE Germany
Article Abstract:
An analysis describing eclogite-facies metasedimentary rocks is presented. The study examined a gneiss complex found in Munchberg, Germany. Examination showed that the formation contained CO2-N2 fluid inclusions with extremely low molar volumes in quartz. However, such rock types are often composed of H2O-rich inclusions correlating with amphibolite-facies conditions. It is shown that fluid composition variations generate local fluid gradients.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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