{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361981470286990080.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/0024-4937(94)90032-9"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:0024493794900329?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:0024493794900329?httpAccept=text/plain"}}],"dc:title":[{"@value":"The Asama igneous complex, central Japan: An ultramafic-mafic layered intrusion in the Mikabu greenstone belt, Sambagawa metamorphic terrain"}],"description":[{"notation":[{"@value":"Abstract   The Asama igneous complex comprises layered mafic and ultramafic plutonic rocks exposed over about 500×6000 m in the Mikabu greenstone belt, Sambagawa metamorphic terrain of Mie Prefecture; its margins terminate by faults, and there is no trace of chilled rocks. The exposed layered sequence is about 460 m thick, and includes dunite, plagioclase wehrlite, olivine gabbro and two-pyroxene gabbro. The crystallization sequence of essential cumulus minerals is olivine, followed by plagioclase and clinopyroxene together, and finally the appearance of orthopyroxene. Olivine systematically varies in composition from Fo89 to Fo78 with stratigraphic height in the lower to middle portion of the layered sequence. The composition of clinopyroxene changes from Ca49Mg46Fe5 to Ca40Mg47Fe13 upward in the layered sequence; cumulus orthopyroxene, which occurs at the top of the exposed layered sequence, has a composition of Ca2Mg74Fe24. Cumulus chromite occurs as disseminated grains in peridotitic rocks, and tends to increase its    Fe     3+   (Cr+Al+Fe     3+   )    ratio with stratigraphic height. The most aluminous chromite [   Cr  (Cr+Al)   = 0.48   ] occurs in dunite that crystallized shortly before plagioclase began to separate as an essential phase. The    Cr  (Cr+Al)    ratio of the most aluminous chromite, coupled with the crystallization order of essential minerals, suggests that the Asama parental magma was moderately enriched in plagioclase and clinopyroxene components in the normative mineral diagram plagioclase-clinopyroxene-orthopyroxene. It was similar to a Hawaiian tholeiite and different from the Bushveld and Great “Dyke” parental magmas that were more enriched in orthopyroxene component; it also differed from mid-oceanic ridge basalts that are more depleted in the orthopyroxene component. The Asama clinopyroxene and chromite show characteristically high TiO2 contents and are also similar to those in Hawaiian tholeiites. The Asama igneous complex probably resulted from the crystallization of a magma of a Hawaiian (oceanic-island) tholeiite composition and formed in an oceanic island regime."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380567007822181517","@type":"Researcher","foaf:name":[{"@value":"T. Agata"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00244937"}],"prism:publicationName":[{"@value":"Lithos"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"1994-11","prism:volume":"33","prism:number":"4","prism:startingPage":"241","prism:endingPage":"263"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:0024493794900329?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:0024493794900329?httpAccept=text/plain"}],"createdAt":"2003-08-08","modifiedAt":"2025-11-02","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002215942228352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Recognizing OIB and MORB in accretionary complexes: A new approach based on ocean plate stratigraphy, petrology and geochemistry"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848657254863488","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The Late Jurassic magmatic protoliths of the Mikabu greenstones in SW Japan: A fragment of an oceanic plateau in the Paleo-Pacific Ocean"}]},{"@id":"https://cir.nii.ac.jp/crid/1360870485028428544","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Carbonation of oceanic serpentinite related to extensive intraplate magmatism"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206238162304","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Mineral chemistry of ultramafic rocks associated with the Asaji metamorphic rocks, eastern Kyushu"},{"@language":"ja","@value":"朝地変成岩類に伴われる超マフィック岩類の鉱物化学組成とその意義"},{"@language":"ja-Kana","@value":"アサジ ヘンセイガンルイ ニ トモナワレル チョウマフィックガンルイ ノ コウブツ カガク ソセイ ト ソノ イギ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206526245376","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Orthopyroxene and compositional layering in the  Sugashima Ultramafic Mass, Mikabu belt"},{"@language":"ja","@value":"ミカブ帯菅島超苦鉄質岩体の斜方輝石の産状と組成層状構造"},{"@language":"ja-Kana","@value":"ミカブタイ スガシマ チョウ クテツ シツガンタイ ノ シャホウ キセキ ノ サンジョウ ト ソセイ ソウジョウ コウゾウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681523488896","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Petrogenesis and geotectonics of the Mikame ultramafic body, western Shikoku, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367116798080","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Rheological profile across the NE Japan interplate megathrust in the source region of the 2011 Mw9.0 Tohoku-oki earthquake"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1016/0024-4937(94)90032-9"},{"@type":"OPENAIRE","@value":"doi_dedup___::8f99e8254affb794722625a4db49bfee"},{"@type":"CROSSREF","@value":"10.2465/gkk.31.87_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"},{"@type":"CROSSREF","@value":"10.1186/1880-5981-66-73_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"},{"@type":"CROSSREF","@value":"10.2465/jmps.140625_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"},{"@type":"CROSSREF","@value":"10.1016/j.gr.2015.06.013_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"},{"@type":"CROSSREF","@value":"10.5575/geosoc.110.698_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"},{"@type":"CROSSREF","@value":"10.1130/b38019.1_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"},{"@type":"CROSSREF","@value":"10.1016/j.jseaes.2018.08.018_references_DOI_IWQmDquIXUZrarn55qljgdL3vtE"}]}