{"@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/1050869456414155136.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"HDL","@value":"https://hdl.handle.net/2115/38248"}},{"identifier":{"@type":"DOI","@value":"10.1046/j.1365-246x.2000.00185.x"}},{"identifier":{"@type":"URI","@value":"http://academic.oup.com/gji/article-pdf/142/3/812/6019614/142-3-812.pdf"}},{"identifier":{"@type":"HANDLE","@value":"2115/38248"}},{"identifier":{"@type":"NAID","@value":"120001206924"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@language":"en","@value":"Magnetic polarity stratigraphy of Siwalik Group sediments of Karnali River section in western Nepal"},{"@value":"Magnetic polarity stratigraphy of Siwalik Group of Karnali River section in Western Central Nepal"}],"dc:language":"en","description":[{"type":"Abstract","notation":[{"@language":"en","@value":"The remanent magnetization of siltstones and sandstones sampled at 476 levels/sites throughout a 3560 m thick molasse sequence belonging to the Siwalik Group (0-2015 m: Lower; 2015-3560 m: Middle) has been studied by stepwise thermal demagnetization. This section is exposed along the Karnali River in Nepal. The natural remanent magnetization (NRM) usually consists of two components: a viscous or thermoviscous component of recent field origin, and an ancient characteristic component (ChRM). The former component is of normal polarity and resides either in goethite (unblocking temperature < 150 ℃; resistant to AFD up to 150 mT) or in maghemite (unblocking temperature 150-400 ℃). Goethite contributes up to 90 per cent of the total intensity in the finer variegated muddy samples belonging to the lower half of the section. Maghemite content is significant in the grey mud-free lithologies from the upper half of the section. The main component, unblocked in the high-temperature range (commonly 610-680 ℃) and believed to reside in haematite, presumably of mostly detrital origin, represents a characteristic remanence (ChRM). The tilt-corrected ChRM directions at individual sites show antipodal clusters (ratio of normal- to reverse-polarity sites: 0.62), and yield mean inclinations recording significant inclination shallowing--a feature well recorded in the Siwaliks. This ChRM is interpreted to represent a largely primary detrital remanence. The ChRM data from 430 sites yield the Karnali River magnetic polarity sequence, whose correlation with the geomagnetic polarity timescale (Cande & Kent 1995) suggests a depositional age of 16 Ma (younger than chron C5Cn.1n) to 5.2 Ma (around the top of chron C3r) for the 3560 m section sampled. Hence, the Karnali River exposes the oldest part of the Siwalik Group in Nepal. Estimates of the sediment accumulation rate (SAR) average to 32.9 cm kyr^[-1] for the 10.8 Myr time span of deposition."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420845751163944832","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60374203"},{"@type":"NRID","@value":"1000060374203"},{"@type":"NRID","@value":"9000406197339"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/gautam"}],"foaf:name":[{"@language":"en","@value":"Gautam, Pitambar"}]},{"@id":"https://cir.nii.ac.jp/crid/1070869456414155136","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000016906020"}],"foaf:name":[{"@language":"en","@value":"Fujiwara, Yoshiki"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"0956540X"},{"@type":"EISSN","@value":"1365246X"},{"@type":"NCID","@value":"AA10717798"}],"prism:publicationName":[{"@language":"en","@value":"Geophysical journal international"}],"dc:publisher":[{"@value":"For the Royal Astronomical Society, the Deutsche Geophysikalische Gesellschaft, and the European Geophysical Society by Blackwell Scientific Publications"}],"prism:publicationDate":"2000-09","prism:volume":"142","prism:number":"3","prism:startingPage":"812","prism:endingPage":"824"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["The definitive version is available at www.blackwell-synergy.com"],"url":[{"@id":"http://academic.oup.com/gji/article-pdf/142/3/812/6019614/142-3-812.pdf"},{"@id":"http://hdl.handle.net/2115/38248"}],"foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Himalayas","dc:title":"Himalayas"},{"@id":"https://cir.nii.ac.jp/all?q=foreland%20basin","dc:title":"foreland basin"},{"@id":"https://cir.nii.ac.jp/all?q=magnetostratigraphy","dc:title":"magnetostratigraphy"},{"@id":"https://cir.nii.ac.jp/all?q=Siwaliks","dc:title":"Siwaliks"},{"@id":"https://cir.nii.ac.jp/all?q=goethite","dc:title":"goethite"},{"@id":"https://cir.nii.ac.jp/all?q=hematite","dc:title":"hematite"}],"dcterms:subject":[{"subjectScheme":"NDC","notation":[{"@value":"450"}]},{"subjectScheme":"Other","notation":[{"@language":"en","@value":"Himalayas"}]},{"subjectScheme":"Other","notation":[{"@language":"en","@value":"foreland basin"}]},{"subjectScheme":"Other","notation":[{"@language":"en","@value":"magnetostratigraphy"}]},{"subjectScheme":"Other","notation":[{"@language":"en","@value":"Siwaliks"}]},{"subjectScheme":"Other","notation":[{"@language":"en","@value":"goethite"}]},{"subjectScheme":"Other","notation":[{"@language":"en","@value":"hematite"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360290617876571008","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Reconstruction of the exhumation history of the eastern Nepal Himalaya based on provenance changes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617877406976","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Miocene provenance change in Himalayan foreland basin and Bengal Fan sediments, with special reference to detrital garnet chemistry"}]},{"@id":"https://cir.nii.ac.jp/crid/1360572092853123968","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Middle Miocene denudation of the Higher Himalayan Crystallines revealed by chemical composition of detrital garnets from the Siwalik foreland basin sediments, western and central Nepal"}]},{"@id":"https://cir.nii.ac.jp/crid/1573105975311582976","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Tectonic and climatic control of the changes in the sedimentary record of the Karnali River section (Siwaliks of western Nepal)"}]},{"@id":"https://cir.nii.ac.jp/crid/2051996266988438016","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Sedimentary facies analysis of the fluvial environment in the Siwalik Group of eastern Nepal : deciphering its relation to contemporary Himalayan tectonics, climate and sea-level change"}]}],"dataSourceIdentifier":[{"@type":"IRDB","@value":"oai:irdb.nii.ac.jp:01364:0007158383"},{"@type":"CROSSREF","@value":"10.1046/j.1365-246x.2000.00185.x"},{"@type":"CIA","@value":"120001206924"},{"@type":"OPENAIRE","@value":"doi_dedup___::64820d258ae9be017626e3ab6ae8ea72"},{"@type":"CROSSREF","@value":"10.1016/j.sedgeo.2021.105920_references_DOI_h4fjT6rmb8T9xZHnvYEubw6jUG"},{"@type":"CROSSREF","@value":"10.1111/iar.12408_references_DOI_h4fjT6rmb8T9xZHnvYEubw6jUG"},{"@type":"CROSSREF","@value":"10.1016/j.jseaes.2020.104473_references_DOI_h4fjT6rmb8T9xZHnvYEubw6jUG"},{"@type":"CROSSREF","@value":"10.1186/s40645-021-00444-5_references_DOI_h4fjT6rmb8T9xZHnvYEubw6jUG"}]}