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Article: Geochemical studies of eclogites and marbles from Sujiahe in the western Dabie Mountains

TitleGeochemical studies of eclogites and marbles from Sujiahe in the western Dabie Mountains
Authors
KeywordsEclogites
Geochemistry
Isotopes
Marbles
Sujiahe
Western Dabie Mountains
Issue Date1998
Citation
Acta Geologica Sinica, 1998, v. 72 n. 4, p. 328-339 How to Cite?
AbstractThe isotope compositions of hydrogen, oxygen, strontium and neodymium and the compositions of rare earth elements (REE) were measured on mineral separates and/or whole-rocks from Xiongdian and Yangchong eclogites and Hujiawan garnet amphibolite in the Sujiahe district, the western Dabie Mountains. δ 18O values of whole-rocks for the Xiongdian eclogites and Hujiawan garnet amphibolite are as high as +8.8‰ to +11.2‰, those for the Yangchong eclogite are as low as +4.3‰. The whole-rock δD values range from -55‰ to -75‰. These results indicate that the eclogite precursors exchanged oxygen and hydrogen isotopes with ancient seawater under both high and low temperatures. The Sr and Nd isotope compositions as well as REE distribution patterns show that the Sujiahe eclogites resemble island arc basalts and thus were probably originated from subducted ancient oceanic crust between the Yangtze and Sino-Korean plates. Marbles occur as the country rocks of the eclogites in Sujiahe and have lower δ 13C values (-2.6‰~+0.1‰) than those from the eastern Dabie Mountains (+0.5‰~+5.7‰). This indicates a difference in sedimentary environment between these marble protoliths (i.e. limestones), maybe due to a difference in their diagenetic ages. δ 18O values of marbles from Xiongdian are as low as +2.0‰~+2.2‰, suggesting a water-rock interaction with a low δ 18O fluid (probably ancient meteoric water) during diagenetic and/or prograde metamorphism.
Persistent Identifierhttp://hdl.handle.net/10722/151004
ISSN
2015 SCImago Journal Rankings: 0.552

 

DC FieldValueLanguage
dc.contributor.authorFu, Ben_US
dc.contributor.authorZheng, Yen_US
dc.contributor.authorXiao, Yen_US
dc.contributor.authorLi, Yen_US
dc.contributor.authorGong, Ben_US
dc.contributor.authorLi, Sen_US
dc.contributor.authorSun, Wen_US
dc.date.accessioned2012-06-26T06:15:43Z-
dc.date.available2012-06-26T06:15:43Z-
dc.date.issued1998en_US
dc.identifier.citationActa Geologica Sinica, 1998, v. 72 n. 4, p. 328-339en_US
dc.identifier.issn0001-5717en_US
dc.identifier.urihttp://hdl.handle.net/10722/151004-
dc.description.abstractThe isotope compositions of hydrogen, oxygen, strontium and neodymium and the compositions of rare earth elements (REE) were measured on mineral separates and/or whole-rocks from Xiongdian and Yangchong eclogites and Hujiawan garnet amphibolite in the Sujiahe district, the western Dabie Mountains. δ 18O values of whole-rocks for the Xiongdian eclogites and Hujiawan garnet amphibolite are as high as +8.8‰ to +11.2‰, those for the Yangchong eclogite are as low as +4.3‰. The whole-rock δD values range from -55‰ to -75‰. These results indicate that the eclogite precursors exchanged oxygen and hydrogen isotopes with ancient seawater under both high and low temperatures. The Sr and Nd isotope compositions as well as REE distribution patterns show that the Sujiahe eclogites resemble island arc basalts and thus were probably originated from subducted ancient oceanic crust between the Yangtze and Sino-Korean plates. Marbles occur as the country rocks of the eclogites in Sujiahe and have lower δ 13C values (-2.6‰~+0.1‰) than those from the eastern Dabie Mountains (+0.5‰~+5.7‰). This indicates a difference in sedimentary environment between these marble protoliths (i.e. limestones), maybe due to a difference in their diagenetic ages. δ 18O values of marbles from Xiongdian are as low as +2.0‰~+2.2‰, suggesting a water-rock interaction with a low δ 18O fluid (probably ancient meteoric water) during diagenetic and/or prograde metamorphism.en_US
dc.languageengen_US
dc.relation.ispartofActa Geologica Sinicaen_US
dc.subjectEclogitesen_US
dc.subjectGeochemistryen_US
dc.subjectIsotopesen_US
dc.subjectMarblesen_US
dc.subjectSujiaheen_US
dc.subjectWestern Dabie Mountainsen_US
dc.titleGeochemical studies of eclogites and marbles from Sujiahe in the western Dabie Mountainsen_US
dc.typeArticleen_US
dc.identifier.emailLi, Y:yiliang@hkucc.hku.hken_US
dc.identifier.authorityLi, Y=rp01354en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0032421169en_US
dc.identifier.volume72en_US
dc.identifier.issue4en_US
dc.identifier.spage328en_US
dc.identifier.epage339en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridFu, B=35960736900en_US
dc.identifier.scopusauthoridZheng, Y=7404838286en_US
dc.identifier.scopusauthoridXiao, Y=7403260575en_US
dc.identifier.scopusauthoridLi, Y=27171876700en_US
dc.identifier.scopusauthoridGong, B=7102144191en_US
dc.identifier.scopusauthoridLi, S=7409239368en_US
dc.identifier.scopusauthoridSun, W=7404011201en_US

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