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Article: Metamorphic P-T paths of the Zanhuang amphibolites and metapelites: Constraints on the tectonic evolution of the Paleoproterozoic Trans-North China Orogen

TitleMetamorphic P-T paths of the Zanhuang amphibolites and metapelites: Constraints on the tectonic evolution of the Paleoproterozoic Trans-North China Orogen
Authors
KeywordsAmphibolite
Metamorphic P-T path
Metapelite
North China Craton
Zanhuang complex
Issue Date2011
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00531/index.htm
Citation
International Journal Of Earth Sciences, 2011, v. 100 n. 4, p. 717-739 How to Cite?
AbstractGarnet-bearing metapelites and amphibolites are exposed in the south and middle parts of the Zanhuang complex, which is located in the central segment of the nearly NS-striking Trans-North China Orogen. These rocks preserve three metamorphic mineral assemblages forming at the prograde, peak and post-peak decompression stages. The prograde metamorphic stage (M1)1) is represented by mineral inclusions within garnet porphyroblasts, the peak metamorphic stage (M2)2) is represented by garnet rims and matrix minerals, whereas the retrograde stage (M3) 3) is represented by amphibole.plagioclase symplectite rimming garnet porphyroblasts in the amphibolites and biotite.plagioclase symplectite rimming garnet porphyroblasts in the metapelites. All garnet porphyroblasts in the metapelites preserve prograde chemical zoning except for the ubiquitous, quite narrow zones from the underwent post-peak decompression. It has been determined through thermobarometric computation that the metamorphic conditions are 650-710°C at 8.2-9.2.kbar for the M1 (inclusion) assemblages, >810°C at >12.5.kbar for the metamorphic peak M2 (matrix) assemblages, and 660-680°C at 4.4-4.5.kbar for the retrograde M3 (symplectite) assemblages. These rocks are thus determined to have undergone metamorphism with clockwise P-T paths involving nearly isothermal decompression (ITD) segments, which is inferred to be related to the amalgamation of the Eastern and Western Blocks to form the coherent basement of the North China Craton along the Trans-North China Orogen in the late Paleoproterozoic (1.88-1.85.Ga).© 2010 Springer-Verlag. © Springer-Verlag 2010.
Persistent Identifierhttp://hdl.handle.net/10722/139171
ISSN
2015 Impact Factor: 2.133
2015 SCImago Journal Rankings: 0.992
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China40672129
40730315
Hong Kong RGC GRF Grants7066/07P
7063/06P
7053/08P
Chinese Academy of Sciences
Funding Information:

Profs. Yu-Guang Ma and Qian Mao helped the authors with electron microprobe analyses. Profs. Simon Wilde and Reiner Klemd provided invaluable corrections of both the science and English of the original manuscript. This work was supported by the National Natural Science Foundation of China (40672129 and 40730315), the Hong Kong RGC GRF Grants (7066/07P, 7063/06P and 7053/08P) and the Knowledge Innovation Program of the Chinese Academy of Sciences. This paper is in memory of Prof. Xin-She Wang (Institute of Geology, Chinese Academy of Geological Sciences).

References

 

DC FieldValueLanguage
dc.contributor.authorXiao, LLen_HK
dc.contributor.authorWu, CMen_HK
dc.contributor.authorZhao, GCen_HK
dc.contributor.authorGuo, JHen_HK
dc.contributor.authorRen, LDen_HK
dc.date.accessioned2011-09-23T05:46:19Z-
dc.date.available2011-09-23T05:46:19Z-
dc.date.issued2011en_HK
dc.identifier.citationInternational Journal Of Earth Sciences, 2011, v. 100 n. 4, p. 717-739en_HK
dc.identifier.issn1437-3254en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139171-
dc.description.abstractGarnet-bearing metapelites and amphibolites are exposed in the south and middle parts of the Zanhuang complex, which is located in the central segment of the nearly NS-striking Trans-North China Orogen. These rocks preserve three metamorphic mineral assemblages forming at the prograde, peak and post-peak decompression stages. The prograde metamorphic stage (M1)1) is represented by mineral inclusions within garnet porphyroblasts, the peak metamorphic stage (M2)2) is represented by garnet rims and matrix minerals, whereas the retrograde stage (M3) 3) is represented by amphibole.plagioclase symplectite rimming garnet porphyroblasts in the amphibolites and biotite.plagioclase symplectite rimming garnet porphyroblasts in the metapelites. All garnet porphyroblasts in the metapelites preserve prograde chemical zoning except for the ubiquitous, quite narrow zones from the underwent post-peak decompression. It has been determined through thermobarometric computation that the metamorphic conditions are 650-710°C at 8.2-9.2.kbar for the M1 (inclusion) assemblages, >810°C at >12.5.kbar for the metamorphic peak M2 (matrix) assemblages, and 660-680°C at 4.4-4.5.kbar for the retrograde M3 (symplectite) assemblages. These rocks are thus determined to have undergone metamorphism with clockwise P-T paths involving nearly isothermal decompression (ITD) segments, which is inferred to be related to the amalgamation of the Eastern and Western Blocks to form the coherent basement of the North China Craton along the Trans-North China Orogen in the late Paleoproterozoic (1.88-1.85.Ga).© 2010 Springer-Verlag. © Springer-Verlag 2010.en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00531/index.htmen_HK
dc.relation.ispartofInternational Journal of Earth Sciencesen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectAmphiboliteen_HK
dc.subjectMetamorphic P-T pathen_HK
dc.subjectMetapeliteen_HK
dc.subjectNorth China Cratonen_HK
dc.subjectZanhuang complexen_HK
dc.titleMetamorphic P-T paths of the Zanhuang amphibolites and metapelites: Constraints on the tectonic evolution of the Paleoproterozoic Trans-North China Orogenen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1437-3254&volume=100&issue=4&spage=717&epage=739&date=2011&atitle=Metamorphic+P-T+paths+of+the+Zanhuang+amphibolites+and+metapelites:+constraints+on+the+tectonic+evolution+of+the+Paleoproterozoic+Trans-North+China+Orogen-
dc.identifier.emailZhao, GC:gzhao@hkucc.hku.hken_HK
dc.identifier.authorityZhao, GC=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00531-010-0522-5en_HK
dc.identifier.scopuseid_2-s2.0-79955551228en_HK
dc.identifier.hkuros193879en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79955551228&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume100en_HK
dc.identifier.issue4en_HK
dc.identifier.spage717en_HK
dc.identifier.epage739en_HK
dc.identifier.isiWOS:000290036300002-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridXiao, LL=25724020200en_HK
dc.identifier.scopusauthoridWu, CM=7501664637en_HK
dc.identifier.scopusauthoridZhao, GC=7403296321en_HK
dc.identifier.scopusauthoridGuo, JH=7404489670en_HK
dc.identifier.scopusauthoridRen, LD=7202372031en_HK
dc.identifier.citeulike6790536-

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