Metamorphism and Metamorphic Belts

Miyashiro, Akiho

doi:10.1007/978-94-011-6836-6

Cited by 485 publications

(245 citation statements)

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“…On the criteria of Leake (1970) most of the schists can be classified as semipelitic, although psammitic varieties do occur; the An content of the plagioclase is consistent with such an affinity (c.f. Miyashiro 1973). Locally there are porphyroblastic growths of fibrolitic sillimanite, garnet, kyanite and muscovite whose relationships to metamorphic and deformational events are discussed later (c.f.…”

Section: Mica Schistmentioning

confidence: 99%

Metamorphic development of cordierite-bearing layered schist and mica schist in the vicinity of Savonranta, eastern Finland

Halden¹,

Bowes²

1984

Bull Geol Soc Finland

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., 1984: Metamorphic development ofcordierite-bearing layered schist and mica schist in the vicinity of Savonranta, eastern Finland. Bull. Geol. Soc. Finland 56, Part 1-2, 3-23.The sequential development of minerals in polyphase deformed schists of the Savonranta district can be demonstrated in a limited number of lithologies. Cordierite-bearing and micaceous schists are used to established a polymetamorphic history within an area where field mapping and structural studies have provided a basis for the erection of temporal relations of metamorphic fabric elements. Coexisting phases whose relative times of development have been established were selected for microprobe analysis ana their compositions used in a quantitative thermodynamic study to determine temperatures and pressures of successive metamorphic events.Conditions deduced for the phase of metamorphism (M,) associated with the D. deformational phase are c. 550°C and 3 kb. The peak of metamorphism, during M 2 -D 2 was at c. 700°C and 7.5 kb. Conditions for an M 3 metamorphic event of c. 300°C and 2-3 kb are estimated from mineral assemblages in P-T space, not from mineral compositions. A late thermal event (M L ') is related to the emplacement of porphyritic granite: c. 600°C and 4kb are estimated from mineral assemblages in P-T space.A single outcrop of a layered schist, which is unique to the district, is interpreted as a tectonic slice from a deeper crustal level. It provides evidence of a low P, high T granulite facies metamorphic event (M EARLY ) pre-dating M,-D,.

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Section: Mica Schistmentioning

confidence: 99%

Metamorphic development of cordierite-bearing layered schist and mica schist in the vicinity of Savonranta, eastern Finland

Halden¹,

Bowes²

1984

Bull Geol Soc Finland

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“…This mica may not be of metamorphic but ignious origin, because the temperature of the Sambagawa metamorphism is not so high (e.g. Miyashiro, 1965), which is supported by the fact that the metamorphic biotite contains usually less than 5 per cent of TiO2 (Kwak, 1968). Recent experimental results (Forbes and Flower, 1974), on the other hand, show that Ti-phlogopite is preserved at higher Inomata and Tazaki, 1974 …”

Section: Chemistry and Physical Prope Rties Of The Phlogopitementioning

confidence: 93%

Titaniferous Phlogopite From the Green Rocks of the Paleozoic Terrain of the Minami-Noma Area, Tokushima Prefecture, Shikoku, Japan.

Inomata¹,

Kaji

1977

J. Japan. Assoc. Min. Petr. Econ. Geol.

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“…In the diagram FeOT-Ab03 (Fig. 8B), all the white micas are classified as metamorphic micas from glaucophane schists (Miyashiro, 1973 ).…”

Section: Phengitesmentioning

confidence: 99%

P–T and structural constraints of lawsonite and epidote blueschists from Liberty Creek and Seldovia: Tectonic implications for early stages of subduction along the southern Alaska convergent margin

López-Carmona

Kusky

Santosh

et al. 2011

Lithos

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Metamorphism and Metamorphic Belts

Cited by 485 publications

References 0 publications

Metamorphic development of cordierite-bearing layered schist and mica schist in the vicinity of Savonranta, eastern Finland

Metamorphic development of cordierite-bearing layered schist and mica schist in the vicinity of Savonranta, eastern Finland

Titaniferous Phlogopite From the Green Rocks of the Paleozoic Terrain of the Minami-Noma Area, Tokushima Prefecture, Shikoku, Japan.

P–T and structural constraints of lawsonite and epidote blueschists from Liberty Creek and Seldovia: Tectonic implications for early stages of subduction along the southern Alaska convergent margin

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