Pressure–temperature conditions and retrograde paths of eclogites, garnet–glaucophane rocks and schists from South Sulawesi, Indonesia

Miyazaki, Kazuhiro; Zulkarnain, Iskandar; Sopaheluwakan, Jan; Wakita, Koji

doi:10.1046/j.1525-1314.1996.00381.x

Cited by 45 publications

(26 citation statements)

References 1 publication

(1 reference statement)

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“…However, Parkinson et al (1998), and Parkinson and Katayama (1999) reported evidence of ultrahigh-pressure metamorphism in the Bantimala Complex from the radial-cracks and polymorph texture interpreted as a quartz pseudomorph after coesite in the jadeite-garnet-quartz rock and coesite inclusions in the zircon grains from quartzite. This feature corroborates the possibility of slightly higher P-T conditions relative to the estimates of Miyazaki et al (1996), possibly up to ultrahigh-pressure conditions before decompression to the estimated peak P-T condition.…”

Section: Peak Stage (M3)supporting

confidence: 78%

“…12). The estimated P-T conditions of both eclogites exhibit slightly higher pressures and temperatures (~0.3 GPa and~50°C are higher for maximum value range of P and T, respectively) compared to previous results from Miyazaki et al (1996) (1.8-2.4 GPa at 580-640°C). However, Parkinson et al (1998), and Parkinson and Katayama (1999) reported evidence of ultrahigh-pressure metamorphism in the Bantimala Complex from the radial-cracks and polymorph texture interpreted as a quartz pseudomorph after coesite in the jadeite-garnet-quartz rock and coesite inclusions in the zircon grains from quartzite.…”

Section: Peak Stage (M3)contrasting

confidence: 74%

“…Our mineral assemblages and textures in the retrograde stage may also use this reaction. Therefore, the hydration reaction and the solid-solution diagram of amphibole might explain the retrograde stage of eclogite from the Bantimala Complex in the same way as other researchers used it to explain the retrograde stage of eclogite (e.g., Bantimala Complex: Miyazaki et al, 1996;Sanbagawa belt: Matsumoto et al, 2003).…”

Section: Retrograde Stage (M4)mentioning

confidence: 89%

“…1a). The study area (South Sulawesi) predominantly comprises sandstone, shale, chert, basalt, dunite, lherzolite, serpentinite, and various metamorphic rocks ranging from low grade to eclogite-facies conditions (Sukamto, 1982;Wakita et al, 1994Wakita et al, , 1996Miyazaki et al, 1996;Parkinson et al, 1998) (Fig. 1b).…”

Section: Geological Outlinementioning

confidence: 99%

“…1b). The Bantimala Complex is a tectonic stack of slices mainly consisting of various sedimentary rocks, ultramafic rocks, metabasites, and metapelites with ages ranging from Jurassic to middle Cretaceous (Sukamto, 1982;Wakita et al, 1994Wakita et al, , 1996Miyazaki et al, 1996;Parkinson et al, 1998). The metamorphic rocks mainly occur within a mélange unit.…”

Section: Geological Outlinementioning

confidence: 99%

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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)supporting

confidence: 78%

Section: Peak Stage (M3)contrasting

confidence: 74%

Section: Retrograde Stage (M4)mentioning

confidence: 89%

Section: Geological Outlinementioning

confidence: 99%

Section: Geological Outlinementioning

confidence: 99%

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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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Survival of eclogite xenolith in a Cretaceous granite intruding the Central Dabieshan migmatite gneiss dome (Eastern China) and its tectonic implications

Lin

Enami

Faure

et al. 2006

Int J Earth Sci (Geol Rundsch)

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Investigation of an eclogite xenolith, discovered in a Cretaceous granite from the Central Domain of the Dabieshan massif in eastern China, yields new petrological insights into the high to ultrahigh-pressure metamorphism, experienced by the Qinling-Dabie orogen. Prior to inclusion as a xenolith in the granite during the Early Cretaceous, this eclogite xenolith had recorded a complex metamorphic evolution that complies with subduction and exhumation processes experienced by the continental crust of the South China Block. Well-preserved mineral parageneses substantiate the prograde and retrograde stages revealed by inclusions in porphyroblastic garnet and zoned minerals such as garnet, omphacite and amphibole in the matrix. The relatively low P/T re-equilibration during a late metamorphic stage was textually inferred by the presence of aluminous and calcic-subcalcic amphiboles such as katophorite, edenite, taramite and pargasite as main matrix phases. According to our U/Pb, Rb/Sr and new 40 Ar/ 39 Ar geochronological results, namely109 ± 1 and 112 ± 2 Ma plateau ages for muscovite and amphiboles, respectively, two successive but distinct cooling stages account for the thermal history of the granite-migmatite gneiss dome that forms the Central Dabieshan Domain. We argue that prior to the Cretaceous doming, the Central Dabieshan Domain experienced a tectono-metamorphic evolution similar to that observed in the high-pressure to ultra high-pressure units developed in the Southern Dabieshan Domain and Hong'an massif.

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Investigation of geothermal structure of the Sulawesi, using gravity and magnetic method

Zhang

Hao

Dong

et al. 2020

Sci. China Earth Sci.

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Pressure–temperature conditions and retrograde paths of eclogites, garnet–glaucophane rocks and schists from South Sulawesi, Indonesia

Abstract: A B S TR A CT High-pressure metamorphic rocks exposed in the Bantimala area, c. 40 km north-east of Ujung Pandang,

Cited by 45 publications

References 1 publication

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

Survival of eclogite xenolith in a Cretaceous granite intruding the Central Dabieshan migmatite gneiss dome (Eastern China) and its tectonic implications

Investigation of geothermal structure of the Sulawesi, using gravity and magnetic method

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