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Article: Emeishan Basalts (SW China) and the 'end-Guadalupian' crisis: magnetobiostratigraphic constraints

TitleEmeishan Basalts (SW China) and the 'end-Guadalupian' crisis: magnetobiostratigraphic constraints
Authors
KeywordsChina
Extinction
Guadalupian
Magnetostratigraphy
Permian
Sichuan
Issue Date2002
PublisherGeological Society Publishing House. The Journal's web site is located at http://www.geolsoc.org.uk/gsl/publications/journals/jgs
Citation
Journal of the Geological Society, 2002, v. 159 n. 1, p. 21-29 How to Cite?
AbstractA magnetostratigraphic investigation of the Permian Emeishan LIP (large igneous province) was carried out on a composite section in Ebian County, close to the type area in Sichuan, SW China. The main succession of twelve flows (175 m thick) carries a normal polarity whilst the one reliable site from the overlying 30 m thick volcanic waning sequence is marked by a reverse polarity. The data enable a correlation to be proposed with an Emeishan Basalt sequence in western Guizhou, c. 400 km to the SE. From our knowledge of the geomagnetic field's reversal behaviour during the Permian, it suggests that the main lava pile along the eastern half of the Emeishan Basalt outcrop belt was erupted within a half to one million years. Using magnetobiostratigraphic data from the adjacent South China platform, the normal polarity magnetozone is correlated with the normal polarity chron associated with the upper part of the Maokou Limestones. Constrained by conodont data, the main Emei Basalts appear to be at least two biozones older (1-1.5 Ma) than the Mid-Late Permian boundary. It is possible, however, that the Emei Basalt waning zone sequence, which represents an explosive volcanic phase, might be coeval with the 'end-Guadalupian' biotic crisis. Thus arguments implicating Emei Basalt volcanism as the causal mechanism behind this major global event have to accommodate the new relative-age constraints.
Persistent Identifierhttp://hdl.handle.net/10722/44692
ISSN
2015 Impact Factor: 2.473
2015 SCImago Journal Rankings: 1.449
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAli, JRen_HK
dc.contributor.authorThompson, GMen_HK
dc.contributor.authorSong, Xen_HK
dc.contributor.authorWang, Yen_HK
dc.date.accessioned2007-10-30T06:07:54Z-
dc.date.available2007-10-30T06:07:54Z-
dc.date.issued2002en_HK
dc.identifier.citationJournal of the Geological Society, 2002, v. 159 n. 1, p. 21-29en_HK
dc.identifier.issn0016-7649en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44692-
dc.description.abstractA magnetostratigraphic investigation of the Permian Emeishan LIP (large igneous province) was carried out on a composite section in Ebian County, close to the type area in Sichuan, SW China. The main succession of twelve flows (175 m thick) carries a normal polarity whilst the one reliable site from the overlying 30 m thick volcanic waning sequence is marked by a reverse polarity. The data enable a correlation to be proposed with an Emeishan Basalt sequence in western Guizhou, c. 400 km to the SE. From our knowledge of the geomagnetic field's reversal behaviour during the Permian, it suggests that the main lava pile along the eastern half of the Emeishan Basalt outcrop belt was erupted within a half to one million years. Using magnetobiostratigraphic data from the adjacent South China platform, the normal polarity magnetozone is correlated with the normal polarity chron associated with the upper part of the Maokou Limestones. Constrained by conodont data, the main Emei Basalts appear to be at least two biozones older (1-1.5 Ma) than the Mid-Late Permian boundary. It is possible, however, that the Emei Basalt waning zone sequence, which represents an explosive volcanic phase, might be coeval with the 'end-Guadalupian' biotic crisis. Thus arguments implicating Emei Basalt volcanism as the causal mechanism behind this major global event have to accommodate the new relative-age constraints.en_HK
dc.languageengen_HK
dc.publisherGeological Society Publishing House. The Journal's web site is located at http://www.geolsoc.org.uk/gsl/publications/journals/jgsen_HK
dc.relation.ispartofJournal of the Geological Society-
dc.rightsJournal of Geological Society. Copyright © Geological Society Publishing House.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectChinaen_HK
dc.subjectExtinctionen_HK
dc.subjectGuadalupianen_HK
dc.subjectMagnetostratigraphyen_HK
dc.subjectPermianen_HK
dc.subjectSichuan-
dc.titleEmeishan Basalts (SW China) and the 'end-Guadalupian' crisis: magnetobiostratigraphic constraintsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0016-7649&volume=159&issue=1&spage=21&epage=29&date=2002&atitle=Emeishan+Basalts+(SW+China)+and+the+%27end-Guadalupian%27+crisis:+magnetobiostratigraphic+constraintsen_HK
dc.identifier.emailAli, JR:jrali@hku.hk-
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1144/0016-764901086-
dc.identifier.scopuseid_2-s2.0-0036144379-
dc.identifier.hkuros69753-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036144379&selection=ref&src=s&origin=recordpage-
dc.identifier.volume159-
dc.identifier.issue1-
dc.identifier.spage21-
dc.identifier.epage29-
dc.identifier.isiWOS:000173188600003-
dc.publisher.placeUnited Kingdom-
dc.identifier.scopusauthoridAli, JR=7102266465-
dc.identifier.scopusauthoridThompson, GM=7403078084-
dc.identifier.scopusauthoridSong, X=7402269092-
dc.identifier.scopusauthoridWang, Y=52164869300-

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