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Amphibolites Study from Various Borehole Depth
57th U.S. Rock Mechanics/Geomechanics Symposium, 2023ABSTRACT In this study the elastic properties of crystalline rocks – amphibolites from different boreholes were studied. We studied the depth effect on the elastic properties of mineralogically quite homogenous rocks – amphibolites. The samples were taken from three different crustal levels – shallow (tens of meters)
T. Lokajícek +4 more
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Earth and Planetary Science Letters, 1978
Abstract Petrological and mineralogical data on amphibolitized gabbros from an Alpine ophiolite massif (Chenaillet Massif, France) are presented. Comparison with metagabbros dredged from the ocean floor shows that synkinematic amphibolite facies conditions may be reached in gabbros after their initial crystallization in the vicinity of the ridge.
Catherine Mevel +2 more
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Abstract Petrological and mineralogical data on amphibolitized gabbros from an Alpine ophiolite massif (Chenaillet Massif, France) are presented. Comparison with metagabbros dredged from the ocean floor shows that synkinematic amphibolite facies conditions may be reached in gabbros after their initial crystallization in the vicinity of the ridge.
Catherine Mevel +2 more
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Generation of granites after amphibolites
Petrology, 2006This paper presents the results of a comprehensive experimental study of the formation of granitoid melts at the expense of olivine-normative amphibolites. It was shown that trondhjemite-tonalite and granite-granodiorite melts can be generated by incongruent melting reactions at pressures of 5–25 kbar at T = 800–1000°C.
V. A. Zharikov, L. I. Khodorevskaya
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CLASSIFICATION OF AMPHIBOLITES
Geological Society of America Bulletin, 1963Research on amphibolite problems has mainly been concentrated on the chemical differences between ortho- and para-amphibolites with little attempt at a classification of rock types. Therefore, a simple classification of amphibolites ( sensu lato ) is presented to include amphibolites ( sensu stricto ), plagioclase amphibolites, and quartz amphibolites.
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Amphibolitization of Scourian granulites
Scottish Journal of Geology, 1974Synopsis Scourian granulite-facies gneisses from north-west Scotland occur as relict masses surrounded by amphibolitized granulites. During amphibolitization the gneisses suffered both deformation and metamorphism. Ortho- and clinopyroxenes were replaced by hornblende and hornblende-quartz intergrowths forming corona textures.
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OXYGEN ISOTOPIC STUDIES OF AMPHIBOLITES
Canadian Journal of Earth Sciences, 1965The whole-rock oxygen isotope ratios of amphibolites from a variety of localities have been studied in an attempt to distinguish para-amphibolites from ortho-amphibolites. If para-amphibolites were derived from a pelite–carbonate mixture or any carbonate-bearing sedimentary rock, they should be enriched in18O relative to basaltic parents. Exchange with
H. P. Schwarcz, R. N. Clayton
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Amphibolitization of calc-silicate metasedimentary rocks
Contributions to Mineralogy and Petrology, 1971Diopside granofels layers are associated with other metasedimentary rocks and gneisses near McMurdo Sound, Antarctica. Disrupted diopside granofels layers form tectonic inclusions which may have reaction rims of amphibolite. This amphibolite may either be a typical hornblende-plagioclase amphiholite or a hornblende-quartz amphibolite according to the ...
Smithson, Scott +2 more
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Amphibolite-granulite facies charnockites
Proceedings of the Indian Academy of Sciences - Section A, 1953The Cheri Hill in the Madras type area of charnockites, shows on careful mapping the folding of bands of leptynite and basic charnockites. The mineralogy of the basic types gives striking evidences of the metamorphic origin of charnockites. The rocks have been subjected to some little retrograde metamorphism and are ascribed to the almandine-diopside ...
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