Article: Buffering of metamorphic reaction temperature by metamorphic fluids in mayuan group, northern fujian province

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TitleBuffering of metamorphic reaction temperature by metamorphic fluids in mayuan group, northern fujian province
AuthorsZhao, G1
Sun, D1
He, T1
KeywordsBuffering
Mayuan Group
Metamorphic Fluids
Metamorphic Reaction Temperature
Issue Date1996
PublisherChinese Academy of Sciences, Institute of Geology and Geophysics. The Journal's web site is located at http://www.ysxb.ac.cn/ysxb/ch/index.aspx
CitationActa Petrologica Sinica, 1996, v. 12 n. 1, p. X5-69 [How to Cite?]
AbstractMetamorphic rocks in Mayuan Group in northern Fujian Province are outcropped in the form of Barrow belts from chlorite, biotite, garnet, staurolite, kyanite to sillimanite zones. The calculations - from geothermometer indicate that the metamorphic temperature of kyanite zone (470°C- 500°C) is obviously lower than that of garnet zone and staurolite zone. It means that kyanite zone was formed before garnet zone and staurolite zone. This is evidently inconsistent with the traditional theory of metamorphic belts. Chemical equilibrium calculations of fluid composition and thermodynamical analysis of metamorphic reactions show that the lower metamorphic temperature of kyanite zone is resulted not from the effect of metamorphic pressure and retrogressive metamorphism but from the buffering of temperature of dehydration metamorphic reaction forming kyanite by fluids with lower XH2o. The buffered temperature range is up to 100°C-200°C. The paper discusses the buffering mechanism and buffering intensity from thermodynamics and emphasizes the important role of metamorphic fluids in the studies of metamorphic facies and metamorphic belts.
ISSN1000-0569
2011 SCImago Journal Rankings: 0.036
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorZhao, G
dc.contributor.authorSun, D
dc.contributor.authorHe, T
dc.date.accessioned2012-06-26T06:15:33Z
dc.date.available2012-06-26T06:15:33Z
dc.date.issued1996
dc.description.abstractMetamorphic rocks in Mayuan Group in northern Fujian Province are outcropped in the form of Barrow belts from chlorite, biotite, garnet, staurolite, kyanite to sillimanite zones. The calculations - from geothermometer indicate that the metamorphic temperature of kyanite zone (470°C- 500°C) is obviously lower than that of garnet zone and staurolite zone. It means that kyanite zone was formed before garnet zone and staurolite zone. This is evidently inconsistent with the traditional theory of metamorphic belts. Chemical equilibrium calculations of fluid composition and thermodynamical analysis of metamorphic reactions show that the lower metamorphic temperature of kyanite zone is resulted not from the effect of metamorphic pressure and retrogressive metamorphism but from the buffering of temperature of dehydration metamorphic reaction forming kyanite by fluids with lower XH2o. The buffered temperature range is up to 100°C-200°C. The paper discusses the buffering mechanism and buffering intensity from thermodynamics and emphasizes the important role of metamorphic fluids in the studies of metamorphic facies and metamorphic belts.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationActa Petrologica Sinica, 1996, v. 12 n. 1, p. X5-69 [How to Cite?]
dc.identifier.epage69
dc.identifier.issn1000-0569
2011 SCImago Journal Rankings: 0.036
dc.identifier.issue1
dc.identifier.scopuseid_2-s2.0-0030465647
dc.identifier.spageX5
dc.identifier.urihttp://hdl.handle.net/10722/150988
dc.identifier.volume12
dc.languageeng
dc.publisherChinese Academy of Sciences, Institute of Geology and Geophysics. The Journal's web site is located at http://www.ysxb.ac.cn/ysxb/ch/index.aspx
dc.publisher.placeChina
dc.relation.ispartofActa Petrologica Sinica
dc.relation.referencesReferences in Scopus
dc.subjectBuffering
dc.subjectMayuan Group
dc.subjectMetamorphic Fluids
dc.subjectMetamorphic Reaction Temperature
dc.titleBuffering of metamorphic reaction temperature by metamorphic fluids in mayuan group, northern fujian province
dc.typeArticle
Author Affiliations
  1. Changsha University of Science and Technology