Journal ArticleDOI
Reaction textures in a spinel-sapphirine granulite from the Eastern Ghats, India, and their implications
Somnath Dasgupta,Juergen Ehl +1 more
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TLDR
A corundum-bearing, spinel-sapphirine-garnet-sillimanite-quartz-(Fe-Ti)-oxide granulite from the Eastern Ghats belt, India, shows reaction textures that suggest formation of coronitic garnet and sillimanite around spinel, quartz and sapphirines as mentioned in this paper.Abstract:
A corundum-bearing, spinel-sapphirine-garnet-sillimanite-quartz-(Fe-Ti)-oxide granulite from the Eastern Ghats belt, India, shows reaction textures that suggest formation of coronitic garnet and sillimanite around spinel, quartz and sapphirine. Mineral-chemical data, chemographic analysis and consideration of the relevant petrogenetic grid in the system FMAS indicate that the mineral reactions occurred in response to nearly isobaric cooling after the metamorphic peak.read more
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Journal ArticleDOI
On ultrahigh-temperature crustal metamorphism
TL;DR: In this article, a review of UHT metamorphism is presented, including the history of experiments that have ultimately lead to the precise P-T constraints we can now place on the generation and evolution of UHP mineral assemblages.
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Influence of ferric iron on the stability of mineral assemblages
Johann F.A. Diener,Roger Powell +1 more
TL;DR: Ferric iron is present in all metamorphic rocks and has the ability to significantly affect their phase relations as mentioned in this paper, however, the influence of ferric iron has commonly been ignored, or at least not considered quantitatively, mainly because its abundance in rocks and minerals is not determined by routine analytical techniques.
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Stability of corundum + quartz relative to kyanite and sillimanite at high temperature and pressure
Daniel E. Harlov,Ralf Milke +1 more
TL;DR: In this article, it was shown that kyanite formed and grew preferentially in the pores surrounding the corundum grains parallel to the Corundum-quartz interface and along quartz grain boundaries.
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A corundum–quartz assemblage from the Eastern Ghats Granulite Belt, India: evidence for high P–T metamorphism?
Rajib Shaw,Makoto Arima +1 more
TL;DR: In this article, a peak metamorphic condition of 12kbar and 1100°C is estimated for corundum-quartz assemblages in the Eastern Ghats Granulite Belt, India.
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Multistage reaction textures in xenolithic high‐MgAl granulites at Anakapalle, Eastern Ghats Belt, India: examples of contact polymetamorphism and infiltration‐driven metasomatism
TL;DR: The sequence of multiphase reaction textures in the high-MgAl xenoliths reflects the changes of physico-chemical conditions during the polyphase evolution of the terrane; UHT metamorphism (stage 1, > 1000°C, c. 10kbar) is documented by relics of extremely coarse grained domains with the assemblage orthopyroxene (opx)1.