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Title of Journal: Contrib Mineral Petrol

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Abbravation: Contributions to Mineralogy and Petrology

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Springer Berlin Heidelberg

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DOI

10.1007/bf03224626

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1432-0967

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Experimental calibration of a garnet–clinopyroxene

Authors: C Beyer D J Frost N Miyajima
Publish Date: 2015/02/06
Volume: 169, Issue: 2, Pages: 18-
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Abstract

Thermodynamic parameters have been calibrated for a geobarometer suitable for use on eclogitic mantle xenoliths The barometer is based on the incorporation of tetrahedrally coordinated aluminum in clinopyroxene coexisting with garnet and has been calibrated using the results of piston cylinder and multianvil experiments performed between pressures of 3 and 7 GPa and temperatures from 1200 to 1550 °C Starting materials were hydrous and anhydrous synthetic mixtures of basaltic bulk compositions that yielded homogeneous bimineralic garnet–clinopyroxene phase assemblages The experimental data set was expanded by employing results from previous experimental studies conducted in eclogitic systems which widened the range of applicable conditions and compositions The calibration reproduces experimental pressures of bimineralic eclogite assemblages in addition to SiO2saturated and kyanitebearing eclogites to within 04 GPa at the 95  confidence interval The barometer was then used to examine equilibration pressures recorded by natural mantle eclogites from various xenolith locations covering a wide pressure temperature and compositional rangeWe are indebted to members of the mechanical electronics and polishing workshop at the BGI for their efforts in maintaining the laboratory equipment This project was financially supported by ERC Grant no 227893 “DEEP” funded through the EU 7th Framework Programme We are grateful for the input from the editor J Blundy S Simakov and one anonymous reviewer who greatly enhanced the manuscript with their contributions


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  2. Formation of cordierite-bearing lavas during anatexis in the lower crust beneath Lipari Island (Aeolian arc, Italy)
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  4. Crystal reaming during the assembly, maturation, and waning of an eleven-million-year crustal magma cycle: thermobarometry of the Aucanquilcha Volcanic Cluster
  5. Origin of phlogopite-orthopyroxene inclusions in chromites from the Merensky Reef of the Bushveld Complex, South Africa
  6. An empirical garnet (YAG) – xenotime thermometer
  7. Magma storage and mixing conditions for the 1953–1974 eruptions of Southwest Trident volcano, Katmai National Park, Alaska
  8. In situ Re–Os isotopic analysis of platinum-group minerals from the Mayarí-Cristal ophiolitic massif (Mayarí-Baracoa Ophiolitic Belt, eastern Cuba): implications for the origin of Os-isotope heterogeneities in podiform chromitites
  9. Reply to comments by Sengupta, Raith and Dasgupta on S. B. Bhattacharya and R. K. Kar (2002)
  10. Trace element mapping by LA-ICP-MS: assessing geochemical mobility in garnet
  11. Metasomatized lithospheric mantle beneath Turkana depression in southern Ethiopia (the East Africa Rift): geochemical and Sr–Nd–Pb isotopic characteristics
  12. In situ observations of bubble growth in basaltic, andesitic and rhyodacitic melts
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  16. Electrical conductivity of orthopyroxene and plagioclase in the lower crust
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  20. The stability and origin of sodicgedrite in ultrahigh-temperature Mg-Al granulites: a case study from the Gondwana suture in southern India
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  22. The Campanian Ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal
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  27. Shoshonite and sub-alkaline magmas from an ultrapotassic volcano: Sr–Nd–Pb isotope data on the Roccamonfina volcanic rocks, Roman Magmatic Province, Southern Italy
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