{"_buckets": {"deposit": "5fc7d7c2-dc67-4469-8204-3c4d64080248"}, "_deposit": {"id": "3224", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "3224"}, "status": "published"}, "_oai": {"id": "oai:niigata-u.repo.nii.ac.jp:00003224"}, "item_5_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Genesis of the pyroxene-bearing I-type tonalite and melting degree of the source rock, in the Hidaka Metamorphic Belt, northern Japan"}]}, "item_5_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1999-08", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "8", "bibliographicPageEnd": "551", "bibliographicPageStart": "536", "bibliographicVolumeNumber": "105", "bibliographic_titles": [{"bibliographic_title": "\u5730\u8cea\u5b66\u96d1\u8a8c"}, {"bibliographic_title": "\u5730\u8cea\u5b66\u96d1\u8a8c", "bibliographic_titleLang": "en"}]}]}, "item_5_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "The Hidaka Metamorphic Belt (HMB) is the low P/T type metamorphic belt and represents to a tilted crustal section. The highest metamorphic P-T condition reaches granulite facies. Syn-metamorphic S- and I-type tonalites are intruded into the crustal layer. Large amount of Pyroxene-bearing S-type tonalites are distributed in the Mt. Esaoman-tottabetsu-dake region, northen part of the HMB. The S-type suite is intruded into the granulite facies metamorphic layers and is believed to have crystallized under lower crustal P-T conditions. In the S-type tonalite suite, pyroxene bearing I-type tonalite bodies are found. The I\uff0dtype tonalites occur as small bodies within the S-type tonalites. Both boundaries are vauge, but some I-type tonalite bodies show chilled margin. The mineral assemblage of the I\uff0dtype tonalite is Bt+Hbl+Opx\u00b1Cpx\u00b1Cum+Pl+Qtz. Petrochemical features indicate that the the I-type tonalite generated from mafic metamorphic rocks (N-MORB composition metabasites). Mass balance calculation and batch partial melting modeling indicate that the melting degree is about 29% and 10-30%, respectively. The I-type tonalite is thought to be generated by crustal anatexis of the mafic metamorphic rocks in the lowermost crust.", "subitem_description_type": "Abstract"}, {"subitem_description": 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