An interlaboratory comparison of piston-cylinder pressure calibration using the albite-breakdown reaction

Johannes, Wilhelm; Bell, Peter M.; Mao, Ho‐kwang; Boettcher, A. L.; Chipman, D. W.; Hays, J. F.; Newton, Robert C.; Seifert, F.

doi:10.1007/bf00372231

Cited by 218 publications

(59 citation statements)

References 30 publications

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“…Such a large assembly minimises frictional loss and shear stress at lower pressures (Johannes et al 1971). A double capsule technique was used to buffer fO 2 .…”

Section: Experimental Methodsmentioning

confidence: 99%

An experimental study of amphibole stability in low-pressure granitic magmas and a revised Al-in-hornblende geobarometer

Mutch

Blundy

Tattitch

et al. 2016

Contrib Mineral Petrol

336

204

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This expression recovers equilibration pressures of our calibrant dataset, comprising both new and published experimental and natural data, to within ±16 % relative uncertainty. An uncertainty of 10 % relative for a typical Al tot value of 1.5 apfu translates to an uncertainty in pressure estimate of 0.5 kbar, or 15 % relative. Thus the accuracy of the barometer expression is comparable to the precision with which near-solidus amphibole rim composition can be characterised.

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“…Such a large assembly minimises frictional loss and shear stress at lower pressures (Johannes et al 1971). A double capsule technique was used to buffer fO 2 .…”

Section: Experimental Methodsmentioning

confidence: 99%

An experimental study of amphibole stability in low-pressure granitic magmas and a revised Al-in-hornblende geobarometer

Mutch

Blundy

Tattitch

et al. 2016

Contrib Mineral Petrol

336

204

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“…The pressure medium for all experiments consisted of a CaF 2 sleeve. Pressure was applied using the cold piston-in technique (Johannes et al, 1971). The friction correction for the assemblies was calibrated against the Ca-Tschermakite breakdown reaction at 1.2 to 1.4 GPa and 1300 °C (Hays, 1966) and determined to be less than the pressure uncertainty associated with the experiments, so that no correction has been applied to the reported pressure.…”

Section: Experimental Methodsmentioning

confidence: 99%

Rapid reequilibration of H2O and oxygen fugacity in olivine-hosted melt inclusions

Gaetani

O'Leary

Shimizu

et al. 2012

Geology

322

222

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“…Using a Johannes-type piston cylinder, pressure can be directly measured by a load cell built into the frame (Johannes 1973) and is considered to be accurate to ±0.043 GPa (Molina andPoli 2000Schmidt 1992). Calibration was performed against the reaction albite = jadeite + quartz (Johannes et al 1971) and no friction was observed compared to values obtained form load cell as a result of the large volume NaCl salt sleeve used. During each run, pressure was first increased to 1.5 GPa and then the assembly was isobarically heated at a constant heating rate (≈50 °C/min) until the target temperature was reached.…”

Section: Piston-cylinder Experimentsmentioning

confidence: 99%

The composition of nanogranitoids in migmatites overlying the Ronda peridotites (Betic Cordillera, S Spain): the anatectic history of a polymetamorphic basement

Acosta-Vigil

Barich

Bartoli

et al. 2016

Contrib Mineral Petrol

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The study of the composition of primary melts during anatexis of high-pressure granulitic migmatites is relevant to understand the generation and differentiation of continental crust.Peritectic minerals in migmatites can trap dropless of melt that forms via incongruent melting reactions during crustal anatexis. These melt inclusions commonly crystallize and form nanogranitoids upon slow cooling of the anatectic terrane. To obtain the primary compositions of crustal melts recorded in these nanogranitoids, including volatile concentrations and information on fluid regimes, they must be remelted and rehomogenize before analysis. A new occurrence of nanogranitoids was recently reported in garnets of mylonitic metapelitic gneisses (former high pressure granulitic migmatites) at the bottom of the prograde metamorphic sequence of Jubrique, located on top of the Ronda peridotite slab (Betic Cordillera, S Spain). Nanogranitoids within separated chips of cores and rims of large garnets from these former migmatites were remelted at 15 kbar and 850, 825 or 800 ºC and dry (without added H 2 O), during 24 hours, using a piston cylinder apparatus. Although all experiments show glass (former melt) within melt inclusions, the extent of rehomogenization depends on the experimental temperature. Experiments at 850-825 ºC show abundant disequilibrium microstructures, whereas those at 800 ºC show a relatively high proportion of rehomogenized nanogranitoids, indicating that anatexis and entrapment of melt inclusions in these rocks was likely close to 800 ºC. Electron microprobe and NanoSIMS analyses show that experimental glasses are leucogranitoid and peraluminous, though define two distinct compositional groups. Type I corresponds to K-rich, Ca-and H 2 O-poor leucogranitic melts, whereas type II represents K-poor, Ca-and H 2 O-rich granodioritic to tonalitic melts. Type I and II melt inclusions are found in most cases at the cores and rims of large garnets, respectively. We tentatively suggest that these former migmatites underwent two melting events under contrasting fluid regimes, possibly during two different orogenic periods. This 3 study demonstrates the strong potential of melt inclusions studies in migmatites and granulites in order to unravel their anatectic history, particularly in strongly deformed rocks where most of the classical anatectic microstructures have been erased during deformation.

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An interlaboratory comparison of piston-cylinder pressure calibration using the albite-breakdown reaction

Cited by 218 publications

References 30 publications

An experimental study of amphibole stability in low-pressure granitic magmas and a revised Al-in-hornblende geobarometer

An experimental study of amphibole stability in low-pressure granitic magmas and a revised Al-in-hornblende geobarometer

Rapid reequilibration of H2O and oxygen fugacity in olivine-hosted melt inclusions

The composition of nanogranitoids in migmatites overlying the Ronda peridotites (Betic Cordillera, S Spain): the anatectic history of a polymetamorphic basement

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