A formative process of the sedimentary complex of the Tamba Terrane in the Wakayama area, Southwest Japan: An example of continuous accretion.

Nakae, Satoshi

doi:10.5575/geosoc.98.401

Cited by 13 publications

(9 citation statements)

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“…After metamorphism and deformation in the deeper part of the subduction zone, an older unit was upthrust over a younger unit which had undergone metamorphism and deformation in the shallower part of the subduction zone with progressive subduction of the oceanic plate, and consequently, a pile-nappe structure had formed in the Early Cretaceous before the Late Cretaceous granitic intrusion. This episodic accretionary and metamorphic process is different from the model which indicates that accretionary complexes have grown by their continuous accretion and their tectonically downward building (Silver et al 1985;Nakae 1992) and from the corner-flow model in accretionary prism (Otsuki 1993).…”

Section: Accretionary and Metamorphic Processmentioning

confidence: 94%

Episodic accretion and metamorphism of Jurassic accretionary complex based on biostratigraphy and K‐Ar geochronology in the western part of the Mino‐Tanba Belt, Southwest Japan

Takami

Itaya

1996

Island Arc

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The low grade metamorphic Jurassic accretionary complex in the western part of the Mino-Tanba Belt, Southwest Japan, is a chaotic sedimentary complex which consists of argillaceous matrices with allochthonous blocks of chert, greenstone, siliceous mudstone, terrigenous sandstone and mudstone. The complex is divided into three distinct geologic units, Units I, I1 and 111, with a tectonic boundary (thrust) between them, forming a pile-nappe structure. They have different features for lithologies, fossil age, metamorphic condition and K-Ar age. Microfossil researches revealed that their timings of accretion were in the early Early Jurassic (ca 195 Ma) for Unit 111, in the early Middle Jurassic (ca 175 Ma) for Unit I1 and in the latest Late Jurassic (ca 147 Ma) for Unit I. On the other hand, K-Ar age determinations of white mica separated from pelitic rocks of the three units clarified that the subsequent subductionrelated metamorphism was 23 million years after the accretion of each unit. These results strongly suggest that the accretionary and metamorphic process had taken place episodically with an interval of 20 to 28 million years during Mesozoic time in the western part of the Mino-Tanba Belt, Southwest Japan.

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Section: Accretionary and Metamorphic Processmentioning

confidence: 94%

Episodic accretion and metamorphism of Jurassic accretionary complex based on biostratigraphy and K‐Ar geochronology in the western part of the Mino‐Tanba Belt, Southwest Japan

Takami

Itaya

1996

Island Arc

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“…Isozaki, 1991 Jones et al, 1993Ichiyama et al, 2008Sano, 1989, 7 Wakita, 1988, 2000;, 2000 Fig . 1 Wakita , 1988; , 2000 Wakita, 1988 Sano, 1988a;Sano et al, 199220 km , 1984Yamagata, 1989 Table 1 Sano, 1988a Table 1 Neoalbaillella ornithoformis…”

Section: Matsuda Andunclassified

“…Di Nocera and Scandone, 1977;Rai et al, 2004;Furin et al, 2006 Di Nocera andScandone, 1977;Bellanca et al, 1995;Carrillat and Martini, 2009;Preto et al, 2009Kanmera, 1969Sano and Nakashima, 1997;Onoue and Sano, 2007;Onoue and Yoshida, 2010Flügel, 2004Di Nocera and Scandone, 1977Erba, 2006Ridgwell, 2005Erba, 2006;Rigo et al, 2007;Goddéris et al, 2008;Furin et al, 2006Ishiga 1986Kuwahara et al 1998Xia et al 20051982 Blome Sugiyama 1992 Mostler 1994 Orchard 1991 Mizutani, 1990Mizutani, , 2000Mizutani, , 2000Mizutani, , 2000, 2000, Wakita, 1988, 2000 322 2010 …”

Section: 2000mentioning

confidence: 99%

美濃帯西部，舟伏山地域の上部三畳系珪質ミクライト

Sano

Kuwahara

Yao

et al. 2010

Jour. Geol. Soc. Japan

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Siliceous micrite crops out in close association with bedded chert and nodular chert in the Middle Jurassic melange of the Mino terrane in the Mt. Funabuseyama area, central Japan. The siliceous micrite and chert form a characteristic lithologic association of a siliceous micrite-chert facies ca. m thick in a bedded chert succession. The siliceous micrite is light gray and occurs as thin, lenticular beds in thin-bedded chert and as irregular-shaped blocks in thick-bedded to massive chert. The siliceous micrite is described as radiolarian limemudstone that includes subordinate thin-shelled bivalves within a limemud matrix. Conodont and radiolarian fossils indicate a Carnian to lower Norian age for the siliceous micrite and associated bedded chert.We interpret the Upper Triassic siliceous micrite as deep-water sediment deposited in a pelagic setting within a mid-oceanic realm. This interpretation implies that short-lived fluctuations of the carbonate compensation depth occurred in Carnian to early Norian time, probably due to the intermittent accumulation of lime mud derived from calcareous nannoplankton.The Upper Triassic siliceous micrite-chert facies differs in containing siliceous micrite from the coeval bedded chert of the oceanic plate stratigraphy of the Mino terrane. We postulate that compared with the Upper Triassic chert, the siliceous micrite-chert facies accumulated on a topographic high at relatively shallow water-depths, probably near the carbonate compensation depth. The Upper Triassic siliceous micrite-chert facies is inferred to have accumulated on the lower slope of a mid-oceanic seamount. We suggest an alternative age of Early Permian or Middle-Late Triassic for the formation of the mid-oceanic seamount. Abstract

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“…, Nakae, 1993;, 20061990, 1993Nakae, 1993;, 1994;, 2005;, 2006, 2007, 2009b , Nakae, 1992Ishiga, 1990Ishiga, 1985 Ishiga Kimura et al (1989), Imoto et al (1989), Imoto et al (1991), Nakae (1993), Kimura et al (1994), Kimura et al (1998), Nakae and Yoshioka (1998), Nakae (2000), Kimura et al (2001), Nakae et al (2002), Sugamori (2009), and Kansai Electric Power Co., Inc. (2010). 1986, 1986, 2006, 2007, 2008, 2009b Ishiga, 1986; Nakae 1992, 19931998, 199820002000, 1989-Nakae, 1992, 1993, 1998, 2002 Fig , 1989;, 1991;, 1991;Nakae, 2002;, 2004, Ishiga, 1986, , 1990, 1988;, 2006…”

mentioning

confidence: 99%

“…1986, 1986, 2006, 2007, 2008, 2009b Ishiga, 1986; Nakae 1992, 19931998, 199820002000, 1989-Nakae, 1992, 1993, 1998, 2002 Fig , 1989;, 1991;, 1991;Nakae, 2002;, 2004, Ishiga, 1986, , 1990, 1988;, 2006, , 2009a, Ishiga, 1990, 1993;Nakae, 1993Nakae, , 2006Nakae, , 2009aSugamori, 2011Sugamori, 2010Sugamori, , 2002 Group , 1991, Proc. Kansai Branch, Geol.…”

mentioning

confidence: 99%

Early Jurassic radiolarians from felsic tuffaceous mudstone in the western part of Obama City, Fukui Prefecture, Southwest Japan

Sugamori¹,

Kametaka²

2011

Jour. Geol. Soc. Japan

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A formative process of the sedimentary complex of the Tamba Terrane in the Wakayama area, Southwest Japan: An example of continuous accretion.

Cited by 13 publications

References 0 publications

Episodic accretion and metamorphism of Jurassic accretionary complex based on biostratigraphy and K‐Ar geochronology in the western part of the Mino‐Tanba Belt, Southwest Japan

Episodic accretion and metamorphism of Jurassic accretionary complex based on biostratigraphy and K‐Ar geochronology in the western part of the Mino‐Tanba Belt, Southwest Japan

美濃帯西部，舟伏山地域の上部三畳系珪質ミクライト

Early Jurassic radiolarians from felsic tuffaceous mudstone in the western part of Obama City, Fukui Prefecture, Southwest Japan

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