File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Emeishan Basalts, SW China: Reappraisal of the formation's type area stratigraphy and a discussion of its significance as a large igneous province

TitleEmeishan Basalts, SW China: Reappraisal of the formation's type area stratigraphy and a discussion of its significance as a large igneous province
Authors
KeywordsFlood basalts
Mantle plumes
Permian
Rifting
South China Block
Issue Date2001
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, 2001, v. 158 n. 4, p. 593-600 How to Cite?
Abstract
The late Permian Emeishan Basalt Formation of SW China is one of Earth's LIPs (large igneous provinces), yet its basic geology remains poorly documented. Recent work on sections close to the type area in Sichuan Province enable us in part to rectify this. Descriptions of the formation and associated units at two areas, one on the lower flanks of Mt Emei and another from a series of outercrops in Ebian County, 50-70 km to the SW, are presented. The basalt pile is 180-270 m thick and in both areas comprises 12 flows that were erupted in relatively quick succession. It rests conformably upon shallow-marine limestones/lignites suggesting emplacement close to sea level. The upper half of the youngest basalt was intensively weathered, but not eroded, prior to it being conformably succeeded by complex body of rocks c. 30 m thick, that includes thin basalts, pyroclastic rocks, tuffs and organic-rich terrestrial sediments. This unit, which has previously been described as a sedimentary package, presumably because intense weathering has obscured the primary lithological fabric in key outcrops, is considered to mark the volcanic waning phase. Uppermost Permian and Triassic terrestrial sediments conformably overlie the terminal volcanic rocks. The sub-regional stratigraphy is compared, as best it can be, with that described from two sections 400 km to the SE; one section matches reasonably well, the other does not, indicating that regional correlations need to be developed carefully. The information is discussed in the context of LIP generator models; several key features of the Emeishan Basalt terrain are at odds with those commonly encountered in LIP's. The most important conclusion is that the unit marks a prematurely terminated system in which full bloodied rifting leading to the development of an ocean basin never started.
Persistent Identifierhttp://hdl.handle.net/10722/44693
ISSN
2013 Impact Factor: 2.800
2013 SCImago Journal Rankings: 1.717
References

 

DC FieldValueLanguage
dc.contributor.authorThompson, GMen_HK
dc.contributor.authorAli, JRen_HK
dc.contributor.authorSong, Xen_HK
dc.contributor.authorJolley, DWen_HK
dc.date.accessioned2007-10-30T06:07:55Z-
dc.date.available2007-10-30T06:07:55Z-
dc.date.issued2001en_HK
dc.identifier.citationJournal Of The Geological Society, 2001, v. 158 n. 4, p. 593-600en_HK
dc.identifier.issn0016-7649en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44693-
dc.description.abstractThe late Permian Emeishan Basalt Formation of SW China is one of Earth's LIPs (large igneous provinces), yet its basic geology remains poorly documented. Recent work on sections close to the type area in Sichuan Province enable us in part to rectify this. Descriptions of the formation and associated units at two areas, one on the lower flanks of Mt Emei and another from a series of outercrops in Ebian County, 50-70 km to the SW, are presented. The basalt pile is 180-270 m thick and in both areas comprises 12 flows that were erupted in relatively quick succession. It rests conformably upon shallow-marine limestones/lignites suggesting emplacement close to sea level. The upper half of the youngest basalt was intensively weathered, but not eroded, prior to it being conformably succeeded by complex body of rocks c. 30 m thick, that includes thin basalts, pyroclastic rocks, tuffs and organic-rich terrestrial sediments. This unit, which has previously been described as a sedimentary package, presumably because intense weathering has obscured the primary lithological fabric in key outcrops, is considered to mark the volcanic waning phase. Uppermost Permian and Triassic terrestrial sediments conformably overlie the terminal volcanic rocks. The sub-regional stratigraphy is compared, as best it can be, with that described from two sections 400 km to the SE; one section matches reasonably well, the other does not, indicating that regional correlations need to be developed carefully. The information is discussed in the context of LIP generator models; several key features of the Emeishan Basalt terrain are at odds with those commonly encountered in LIP's. The most important conclusion is that the unit marks a prematurely terminated system in which full bloodied rifting leading to the development of an ocean basin never started.en_HK
dc.format.extent1289657 bytes-
dc.format.extent2244 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
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 Societyen_HK
dc.rightsJournal of Geological Society. Copyright © Geological Society Publishing House.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectFlood basaltsen_HK
dc.subjectMantle plumesen_HK
dc.subjectPermianen_HK
dc.subjectRiftingen_HK
dc.subjectSouth China Blocken_HK
dc.titleEmeishan Basalts, SW China: Reappraisal of the formation's type area stratigraphy and a discussion of its significance as a large igneous provinceen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0016-7649&volume=158&issue=4&spage=593&epage=599&date=2001&atitle=Emeishan+Basalts,+SW+China:+reappraisal+of+the+formation%27s+type+area+stratigraphy+and+a+discussion+of+its+significance+as+a+large+igneous+provinceen_HK
dc.identifier.emailAli, JR:jrali@hku.hken_HK
dc.identifier.authorityAli, JR=rp00659en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.scopuseid_2-s2.0-0034779199en_HK
dc.identifier.hkuros69756-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034779199&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume158en_HK
dc.identifier.issue4en_HK
dc.identifier.spage593en_HK
dc.identifier.epage600en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridThompson, GM=7403078084en_HK
dc.identifier.scopusauthoridAli, JR=7102266465en_HK
dc.identifier.scopusauthoridSong, X=7402269092en_HK
dc.identifier.scopusauthoridJolley, DW=24316966400en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats