Evolution of the Hidaka metamorphic belt, northern Japan

Komatsu, Masayuki; Osanai, Yasuhito; Toyoshima, T.; Miyashita, Sumio

doi:10.1144/gsl.sp.1989.043.01.45

Cited by 65 publications

(59 citation statements)

References 21 publications

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“…1a). The belt exposes a typical cross section of a magmatic arc, and consists of intrusive magmatic rocks and eastwards-dipping metamorphic rocks that have a NNWeSSE trending zonal distribution (e.g., Komatsu et al, 1983Komatsu et al, , 1989Osanai et al, 1991;Toyoshima et al, 1994, Fig. 1b).…”

Section: Geological Settingmentioning

confidence: 99%

“…1b). The metamorphic grade of the Hidaka metamorphic rocks decreases progressively from granulite facies in the basal (western) part to very low-grade metasediments in the top (eastern) part of the belt (Osanai, 1985;Osanai et al, 1986Osanai et al, , 1991Osanai et al, , 2007Komatsu et al, 1989). The Hidaka metamorphic rocks are grouped into two sequences, lower and upper (Komatsu et al, 1983).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Hidaka metamorphic rocks are grouped into two sequences, lower and upper (Komatsu et al, 1983). The lower sequence is composed of amphibolite to granulite facies mafic, pelitic, and psammitic rocks, and the upper sequence, in descending order, consists of very lowgrade (prehniteepumpellyite facies) metasediments, muscovite (Ms)echlorite (Chl) metasediments, biotite (Bt)eMs schists, BteMs gneisses, and banded Bt gneisses (Osanai et al, 1986(Osanai et al, , 1991Komatsu et al, 1989). The uppermost (easternmost) metasediments of the Hidaka metamorphic belt are lithologically continuous with sedimentary rocks of the Nakanogawa Group that overlie the upper sequence (e.g., Komatsu et al, 1989;Osanai and Owada, 1989), and the Nakanogawa Group is considered to be the protolith of the upper sequence (Komatsu et al, 1983).…”

Section: Geological Settingmentioning

confidence: 99%

See 2 more Smart Citations

Strain-induced amorphization of graphite in fault zones of the Hidaka metamorphic belt, Hokkaido, Japan

Nakamura

Oohashi

Toyoshima

et al. 2015

Journal of Structural Geology

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

See 1 more Smart Citation

Strain-induced amorphization of graphite in fault zones of the Hidaka metamorphic belt, Hokkaido, Japan

Nakamura

Oohashi

Toyoshima

et al. 2015

Journal of Structural Geology

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“…, 1985--, 1985, 1986Shimura et al, 1992-Chappell and White 1974S I , 1986Komatsu et al, 1989;Osanai et al, 1991;, 1992;Shimura et al, 1992Shimura et al, , 2004Shimura et al, S I S , 1986Shimura et al, S I , , 1986, 1992;, 1994;Shimura et al, 2004 …”

Section: Kmmentioning

confidence: 99%

Origin of the I- and S-type tonalite magma in the Satsunai-gawa Shichino-sawa river region of the Hidaka metamorphic belt, Hokkaido, northern Japan: Inferences from Sr and Nd isotopic compositions

萌

俊昭²

2014

Jour. Geol. Soc. Japan

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“…Komatsu et al, 1983Komatsu et al, , 1986Komatsu et al, , 1989Osanai, 1985;Osanai et al, 1986a, b; Fig. 1).…”

Section: Geology and Tectonics Of The Hidaka Metamorphic Beltunclassified

Pseudotachylytes, related fault rocks, asperities, and crustal structures in the Hidaka metamorphic belt, Hokkaido, northern Japan

et al. 2014

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Many pseudotachylytes and their related fault rocks are found in the Hidaka metamorphic belt representing an ancient crustal section. On the basis of field observations of the pseudotachylytes and related fault rocks, nature of seismogenic faulting in the Hidaka crust is examined. The field observations suggest the following conclusions.(1) Two structural types of pseudotachylytes are distinguished: layer-parallel and layer-oblique. The latter are scattered in the metamorphic belt, but the former occur only in the southern part of the metamorphic belt. (2) An abundance of the layer-parallel pseudotachylytes suggests that earthquakes occurred repeatedly and frequently in the southern part, where complicated and duplicated crustal structures occur with many lowtemperature thin mylonite zones. The southern part with such crustal structures was an ancient seismogenic area containing asperities and having a radius of a few tens of kilometers in the Hidaka crust. In the seismogenic area, the layer-parallel pseudotachylytes resulted from seismic slip on the mylonitic foliation within the lowtemperature mylonite zones with strong preferred orientation of micas. (3) The layer-parallel pseudotachylytes and the subsequent layer-oblique pseudotachylytes post-date the latest and very-low-temperature mylonitization in the metamorphic belt. The former pseudotachylytes formed just above the upper side of the brittle-plastic transition zone.

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Evolution of the Hidaka metamorphic belt, northern Japan

Cited by 65 publications

References 21 publications

Strain-induced amorphization of graphite in fault zones of the Hidaka metamorphic belt, Hokkaido, Japan

Strain-induced amorphization of graphite in fault zones of the Hidaka metamorphic belt, Hokkaido, Japan

Origin of the I- and S-type tonalite magma in the Satsunai-gawa Shichino-sawa river region of the Hidaka metamorphic belt, Hokkaido, northern Japan: Inferences from Sr and Nd isotopic compositions

Pseudotachylytes, related fault rocks, asperities, and crustal structures in the Hidaka metamorphic belt, Hokkaido, northern Japan

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