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Hayachine Complex

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( a ) Simplified geological map of the northwestern part of southern Kitaka...
Published: 01 December 2020
Figure 1. ( a ) Simplified geological map of the northwestern part of southern Kitakami Mountains showing distributions of the Miyamori and Hayachine ultramafic-mafic complexes in the Hayachine-Miyamoriophiolite, Ordovician-Devonian strata, and Silurian-Devonian granitic rocks (after Ehiro
Journal Article
Published: 01 December 2020
American Mineralogist (2020) 105 (12): 1778–1801.
...Figure 1. ( a ) Simplified geological map of the northwestern part of southern Kitakami Mountains showing distributions of the Miyamori and Hayachine ultramafic-mafic complexes in the Hayachine-Miyamoriophiolite, Ordovician-Devonian strata, and Silurian-Devonian granitic rocks (after Ehiro...
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Journal Article
Published: 01 August 2002
American Mineralogist (2002) 87 (8-9): 1096–1103.
... each of the complexes. The samples were collected along the Komegamori stream at an elevation of 1230 m in the Hayachine ultramafic complex, along an unnamed stream between the Shirataki mountain and Takao at an elevation of 640 m in the Tari-Misaka ultramafic complex, and in a waste dump (drill-core...
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Journal Article
Published: 01 February 2008
American Mineralogist (2008) 93 (2-3): 351–359.
... bodies are common in the Japanese islands, and most have recrystallized to assemblages containing olivine, talc, amphiboles, and enstatite during contact or regional metamorphism. The Hayachine ultramafic complex (4 × 2 km) of the Tohoku district, northeastern Japan, experienced contact metamorphism...
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Series: Geological Society, London, Geology of Series, Geological Society, London, Geology of Series
Published: 01 January 2016
DOI: 10.1144/GOJ.9
EISBN: 9781862397064
... the boundary of the two massifs to the south of the Nedamo Belt (the Hayachine ultramafic complex) and along the Hizume-Kesennuma Fault (Miyamori ultramafic complex) ( Seki 1951 , 1952; Onuki 1963, 1964, 1965; Ozawa 1983 , 1984, 1988, 1990, 1994, 2001; Fujimaki & Yomogida 1986; Ozawa et al. 1988...
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Image
Present-day values of  87 Sr/ 86 Sr and  143 Nd/ 144 Nd of whole-rocks and ...
Published: 01 December 2020
Figure 6. Present-day values of 87 Sr/ 86 Sr and 143 Nd/ 144 Nd of whole-rocks and separated clinopyroxene phenocrysts for examined 4 ultramafic dikes ( a ) and other mafic and ultramafic rocks in the Hayachine-Miyamori ophiolite from the literature ( b ). Symbols and paring lines
Journal Article
Published: 18 December 2018
Geological Magazine (2021) 158 (1): 13–29.
... . 500 Ma K–Ar age, Hikami Granite c . 440 Ma and Hayachine Ophiolite of Ordovician age respectively (Ehiro et al. 2016 ). The Early Carboniferous accretionary complex of the Nedamo Belt is the oldest, non-metamorphosed accretionary complex in Japan (Uchino et al. 2005 ; Uchino & Kawamura...
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Image
Relationship between chondrite normalized ratio of Nd and Sm [(Nd/Sm)n] and...
Published: 01 December 2020
Figure 18. Relationship between chondrite normalized ratio of Nd and Sm [(Nd/Sm)n] and that of Dy/Yb [(Dy/Yb)n] for the ultramafic dikes ( Table 5 ) of the Hayachine-Miyamori ophiolite as stars with errors and the other Cambrian-Ordovician subduction-related ophiolites, which are ( a ) Bymarka
Journal Article
Published: 01 January 2010
American Mineralogist (2010) 95 (1): 73–80.
..., Western Australia, and talc-chlorite schist in Western Australia ( Schumacher and Czank 1987 ; Akai et al. 1997 ; Droop 1994 ). Proto-polymorphs of jimthompsonite and chesterite were found in contact metamorphosed ultramafic rocks from Hayachine, Japan ( Konishi et al. 2008 ). In addition...
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Journal Article
Published: 01 July 2018
American Mineralogist (2018) 103 (7): 1151–1160.
... The Philippine Sea Oceanic Plate has a complex architecture comprising several geotectonic domains, including three back-arc basins: the West Philippine Basin, the Parece Vela Basin, and the Shikoku Basin ( Lallemand 2016 ; Wu et al. 2016 and references therein). These back-arc basins, together with the Izu...
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Journal Article
Published: 01 August 2003
American Mineralogist (2003) 88 (8-9): 1271–1278.
.... These findings suggest that the petrological variation of natural mantle peridotite cannot be formed by simple batch melting but may be the result of more complex melting. * E-mail: kmatsu@mx.ibaraki.ac.jp 12 04 2003 24 06 2002 © 2003 American Mineralogist 2003 The Mg’ of olivine...
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Series: Geological Society, London, Geology of Series, Geological Society, London, Geology of Series
Published: 01 January 2016
DOI: 10.1144/GOJ.2
EISBN: 9781862397064
... Abstract Pre-Cenozoic rocks of the Japanese islands are largely composed of latest Palaeozoic to Cretaceous accretionary complexes and Cretaceous granitic intrusives. Exposures of older rocks are restricted to a limited number of narrow terranes, notably the Hida, Oeyama and Hida Gaien belts...
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Journal Article
Journal: GSA Bulletin
Published: 20 April 2021
GSA Bulletin (2021)
...- and sediments). The new petrological, geo- structures of emplaced ophiolites are generally ated with boninites may also be used as an in- chemical, and geochronological data, com- complex, with folds, imbricated thrust, duplex, dicator of SI. bined with the regional geology, indicate and block-in-matrix...
Journal Article
Published: 01 October 2000
The Canadian Mineralogist (2000) 38 (5): 1041–1063.
... continuous melting theory to the origin of “super-depleted” (SL) melt (glass) trapped in mantle materials. Ozawa & Shimizu (1995) invoked an open-system continuous melting regime to explain features of the Hayachine and Miyamori ultramafic complexes of Japan. Albarède (1995) discussed the formalism...
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Journal Article
Published: 01 February 2006
The Canadian Mineralogist (2006) 44 (1): 267–287.
... The Neotethyan ophiolites of Greece outcrop as two main N–S-trending belts. The best-known Greek ophiolite complexes, Vourinos, Pindos and Othrys, belong to the western ophiolitic belt. Harzburgite, with associated dunite, is the dominant ultramafic component of all the western ophiolites, although a few massifs...
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Journal Article
Journal: Economic Geology
Published: 01 March 2009
Economic Geology (2009) 104 (2): 249–266.
... ridge of Bou Azzer-El Graara. The Bou Azzer ophiolite complex forms a 60-km-long belt that trends west-northwest–east-southeast along the Anti-Atlas major fault (Fig. 2 ). Ophiolitic rocks in the central portion of the inlier form tectonic slices of approximately 5-km thickness that are best viewed...
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Journal Article
Published: 01 May 2013
Bulletin of the Seismological Society of America (2013) 103 (2B): 1503–1521.
... into distinct north and south segments by the Hayachine eastern boundary fault (Fig.  2b ). The northern segment of the Kitakami Mountains largely comprises Mesozoic sedimentary rocks that are part of a large accretionary complex ( Mikoshiba et al. , 2004 ). The southern segment consists of shallow‐marine...
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Journal Article
Journal: GSA Bulletin
Published: 24 June 2021
GSA Bulletin (2021)
... of Precambrian basement and slow-spreading mid-ocean ridges as oceanic core et al., 2012, 2014; Gong et al., 2016, 2020). The Paleozoic and Triassic marine strata, exists in complexes, and were then trapped in the forearc lherzolites are characterized by abundant modal the western part of the suture, separating...
Journal Article
Journal: Economic Geology
Published: 01 January 2012
Economic Geology (2012) 107 (1): 25–41.
...Gideon Lambiv Dzemua; Sarah A. Gleeson Abstract The Nkamouna Co-Mn-Ni laterite is an advanced exploration project located in southeast Cameroon. The deposit comprises a deep and complex laterite profile with high Co (~0.25 wt %) and Mn (1.33 wt %) contents, subeconomic Ni grade and a Ni:Co ratio...
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Journal Article
Published: 01 January 2012
American Mineralogist (2012) 97 (1): 184–196.
... circumstances attending the transition may be more complex. A large proportion of whole-rock analyses of strongly to fully serpentinized peridotites (say with greater than 10 wt% H 2 O) have Fe 3+ /Fe 2+ ratios close to, or even greater than 2:1 ( Evans 2008 , Fig. 1 ). This observation implies...
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