Heat capacity and thermodynamic properties for coesite and jadeite, reexamination of the quartz-coesite equilibrium boundary

Hemingway, Bruce S.; Bohlen, Steven R.; Hankins, W. B.; Westrum, Edgar F.; Kuskov, O. L.

doi:10.2138/am-1998-5-601

Cited by 102 publications

(46 citation statements)

References 31 publications

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“…The lowest and highest Si contents in the phengite rim (Si = 3.40-3.44) are used to set the minimum and maximum pressures in this stage ( Table 2). The results give a range of 2.3-2.7 GPa at 600-680°C, which plots around the coesite-quartz transition line (Hemingway et al, 1998;Fig. 12).…”

Section: Peak Stage (M3)mentioning

confidence: 87%

“…The facies boundaries are from Evans (1990): LBS, lawsonite blueschistfacies; E, eclogite-facies; AEA, albite epidote amphibolite-facies; A, amphibolite-facies; GS, greenschist-facies. Experimentally determined reactions: (1) Ab = Jd + Qz (Holland, 1983); (2) Ep + Ttn = Grt + Rt + Qz + H 2 O (Manning and Bohlen, 1991); (3) Gln + Ep = Grt + Omp + Qz + H 2 O (Evans, 1990); (4) coesite and quartz stability field (Hemingway et al, 1998); (5) maximum stability field of glaucophane (Maresch, 1977); (6) amphibole solid-solution (Otsuki and Banno, 1990). Garnet-clinopyroxene geothermometry symbols: circle from Ellis and Green (1979), square from Powell (1985), and triangle from Ravna (2000).…”

Section: Prograde Stage (M1 and M2)mentioning

confidence: 99%

See 1 more Smart Citation

Prograde and retrograde evolution of eclogites from the Bantimala Complex in South Sulawesi, Indonesia

Setiawan

Osanai

Nakano

et al. 2016

Journal of Mineralogical and Petrological Sciences

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This contribution reports the metamorphic evolution of the high-pressure metamorphic rocks from the Bantimala Complex, South Sulawesi, Indonesia. Barroisite-bearing and barroisite-free eclogites were examined to assess their metamorphic evolutions, which have implications regarding the tectonic conditions in this region. The eclogites mainly consist of garnet, omphacite, phengite, rutile, and epidote, with or without barroisite. The variations in mineral assemblages are interpreted to depend upon local changes in the bulk chemical composition. The barroisite-bearing eclogites contain two types of euhedral garnet: coarse-(1-1.5 mm) and finegrained (<0.5 mm). Mineral inclusions in the coarse-grained garnet core and mantle show epidote + titanite and glaucophane + epidote assemblages, that stabilized at 0.9-1.5 GPa and 350-550°C within epidote blueschist-facies conditions. Mineral chemistry and chemical-mapping analyses indicate that both fine-grained garnet and the rim of coarse-grained garnet formed at peak P-T conditions, which were estimated as 2.3-2.7 GPa at 615-680°C based on the garnet-omphacite-phengite-quartz equilibrium. Peak P-T conditions for barroisitefree eclogite were similar (2.5-2.7 GPa at 650-690°C) to those for barroisite-bearing eclogite. Actinolite rims overgrowing matrix sodic-calcic amphiboles attest to retrogression at P < 0.5 GPa and T < 350°C in a clockwise P-T path. The very low geothermal gradient experienced during the prograde path (~5°C/km) likely suggests the subduction of an old and cold oceanic crust. The low geothermal gradient on the retrograde path suggests decompressional cooling during exhumation, possibly favored by a serpentinite-dominated matrix within a subduction channel environment.

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Section: Peak Stage (M3)mentioning

confidence: 87%

Section: Prograde Stage (M1 and M2)mentioning

confidence: 99%

Prograde and retrograde evolution of eclogites from the Bantimala Complex in South Sulawesi, Indonesia

Setiawan

Osanai

Nakano

et al. 2016

Journal of Mineralogical and Petrological Sciences

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“…Kuskov (1995Kuskov ( , 1997 and Kuskov and Kronrod (1998b). Entropy and heat capacity (C p (J mol −1 K −1 ) = 259.08 + 0.038032T − 2518908T 2 − 1332.57T −0.5 − 8.8(10 −6 )T 2 ) for NaAlSi 2 O 6 ) are from Hemingway et al (1998). The calculated properties of jadeite at 105 kbar and 1273 K are as follows: ρ = 3.489 g cm −3 , V p = 8.88 and V s = 4.94 km s −1 , and γ = 1.15.…”

Section: Fetio 3 (Ilmenite)mentioning

confidence: 99%

Core Sizes and Internal Structure of Earth's and Jupiter's Satellites

Kuskov

Kronrod

2001

Icarus

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“…1) is a straight line defined by the quartz-coesite transition (Hemingway et al 1998) and the garnetperovskite transition for CaGeO 3 (Susaki et al 1985). Extrapolation of this line to zero oil pressure gives a slightly positive value for pressure on the sample.…”

Section: (Traduit Par La Rédaction)mentioning

confidence: 99%

“…Zero oil pressure at zero load has not been used in defining the curve because the weight of the large overhead ram and guideblock assembly add a small but undetermined pressure in addition to the oil pressure. Because we have used the quartz-coesite curve of Hemingway et al (1998) rather than that of Bohlen & Boettcher (1982) used earlier in this laboratory, our new calibration curve ( Fig. 1) gives slightly higher pressures for a given load at pressures less than 6 GPa.…”

Section: (Traduit Par La Rédaction)mentioning

confidence: 99%

THE SYSTEM DIOPSIDE FORSTERITE ENSTATITE AT 5.1 GPa: A TERNARY MODEL FOR MELTING OF THE MANTLE

Weng¹,

Presnall²

2001

The Canadian Mineralogist

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Data determined using a multianvil press are given for liquidus phase relations in the system diopside -forsterite -enstatite (CaMgSi 2 O 6 -Mg 2 SiO 4 -MgSiO 3 ) and extend for a limited distance into the larger ternary system diopside -forsterite -quartz at 5.1 GPa. In the system diopside-enstatite, which cuts across the system diopside -forsterite -quartz and divides it into two smaller ternary systems, the peritectic between clinopyroxene and orthopyroxene occurs at Di 43 En 57 and is defined by the reaction 100 cpx = 64 opx + 36 liq. An azeotropic minimum occurs on the clinopyroxene liquidus at Di 67 En 33 . In the ternary system diopside -forsterite -enstatite, a peritectic occurs at Di 43 Fo 46 Qtz 11 and is defined by the reaction 69 opx + 31 liq = 95 cpx + 5 fo (wt.%). These ternary phase relations can be used to model three important aspects of the volatile-free phase relations and melting behavior of natural peridotite with a high degree of accuracy. (1) Olivine, orthopyroxene, and clinopyroxene occur at the solidus at 2 GPa, but orthopyroxene is absent at the solidus at 5.1 GPa. (2) During equilibrium melting at 5.l GPa, orthopyroxene appears just above the solidus and then disappears again at higher temperatures. At both 2 and 5.1 GPa, the proportions of phases in the ternary system at various degrees of melting are close to the proportions observed in the melting of natural peridotite by Walter (1998). (3) As pressure increases, MgO increases and SiO 2 decreases in initial melts.Keywords: mantle, melting, phase relations, peridotite, diopside, forsterite, enstatite. SOMMAIRENous présentons des données sur les relations de phases sur le liquidus pour le système diopside -forstérite -enstatite (CaMgSi 2 O 6 -Mg 2 SiO 4 -MgSiO 3 ), avec extension limitée dans le système ternaire plus complet, diopside -forstérite -quartz; elles ont été déterminées à 5.1 GPa avec un appareil à enclumes multiples. Dans le système diopside-enstatite, qui recoupe le système diopside -forstérite -quartz et le subdivise en deux systèmes ternaires plus petits, la relation péritectique entre clinopyroxène et orthopyroxène se situe au point Di 43 En 57 ; cette réaction serait 100 cpx = 64 opx + 36 liq. Un minimum azéotrope se trouve sur la partie du liquidus où le clinopyroxène est présent, à Di 67 En 33 . Dans le système ternaire diopside -forstérite -enstatite, une relation péritectique a lieu à Di 43 Fo 46 Qtz 11 ; cette réaction serait 69 opx + 31 liq = 95 cpx + 5 fo (proportions pondérales). Nous nous servons de ces relations de phases ternaires pour proposer un modèle de trois aspects importants des relations en l'absence d'une phase volatile et du mode de fusion de péridotites naturelles avec un degré élevé de justesse. (1) Olivine, orthopyroxène, et clinopyroxène se trouvent sur le solidus à 2 GPa, mais l'orthopyroxène est absent au solidus à 5

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Heat capacity and thermodynamic properties for coesite and jadeite, reexamination of the quartz-coesite equilibrium boundary

Cited by 102 publications

References 31 publications

Prograde and retrograde evolution of eclogites from the Bantimala Complex in South Sulawesi, Indonesia

Prograde and retrograde evolution of eclogites from the Bantimala Complex in South Sulawesi, Indonesia

Core Sizes and Internal Structure of Earth's and Jupiter's Satellites

THE SYSTEM DIOPSIDE FORSTERITE ENSTATITE AT 5.1 GPa: A TERNARY MODEL FOR MELTING OF THE MANTLE

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