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Article: Structural style and tectonic significance of the Jianglang dome in the eastern margin of the Tibetan Plateau, China

TitleStructural style and tectonic significance of the Jianglang dome in the eastern margin of the Tibetan Plateau, China
Authors
KeywordsDuctile Slab
Jianglang Tectonic Dome
Schist Complex
Sedimentary Unit
South China
Tibet
Issue Date2003
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jsg
Citation
Journal Of Structural Geology, 2003, v. 25 n. 5, p. 765-779 How to Cite?
AbstractThe Jianglang Tectonic Dome (JTD) lies on the eastern margin of the Tibetan Plateau and consists of three tectono-stratigraphic units separated by two extensional detachment faults: a schist complex, a middle ductile slab and an overlying sedimentary unit. The schist complex is composed of quartz-mica schists and amphibolites of possible Mesoproterozoic age and exhibits two early foliations (S 1 S 2) overprinted by two later foliations (S 3 S 4). The ductilely deformed middle slab consists of Paleozoic quartzite, phyllite, marble, amphibolite and meta-basalt. It is characterized by pervasive intrafolial and intraformational recumbent folds with a penetrative axial foliation S′ 1 (an equivalent of S 3 in the basement rocks). The cover unit, the Triassic Xikang Group of flysch sedimentary rocks, experienced shallow level buckling and flattening deformation with an axial cleavage defining S″ 1 (an equivalent of S 4 in the middle slab and basement rocks). The JTD appears to have experienced three stages of extension immediately after orogeny. The earliest (D 1), recorded by an axial surface S 1 of S 0 intrafolial folds and sub-parallel to S 0 in the schist complex, probably occurred prior to the collision between the South China and North China Blocks. This extensional event was followed by subduction of the Yangtze Block to the west towards the eastern margin of the Tibetan Plateau. The two detachment faults are characterized by structures formed by ductile-brittle to brittle shear deformation, which are sub-parallel to the layer of S 2 in the lower detachment and to S 0 in the upper detachment. These faults mark the second stage of extension and may have caused thinning and selective removal of the Sinian and Paleozoic strata, as well as exhumation of the schist complex and the middle slab in the middle Jurassic (177 Ma). The final stage of extension (D 5), shown by brittle deformation and thermo-metamorphism from the lower detachment to the Xikang Group, was associated with the Indian-Eurasia collision. © 2002 Elsevier Science Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/151116
ISSN
2015 Impact Factor: 2.084
2015 SCImago Journal Rankings: 1.648
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYan, DPen_US
dc.contributor.authorZhou, MFen_US
dc.contributor.authorSong, Hen_US
dc.contributor.authorFu, Zen_US
dc.date.accessioned2012-06-26T06:17:15Z-
dc.date.available2012-06-26T06:17:15Z-
dc.date.issued2003en_US
dc.identifier.citationJournal Of Structural Geology, 2003, v. 25 n. 5, p. 765-779en_US
dc.identifier.issn0191-8141en_US
dc.identifier.urihttp://hdl.handle.net/10722/151116-
dc.description.abstractThe Jianglang Tectonic Dome (JTD) lies on the eastern margin of the Tibetan Plateau and consists of three tectono-stratigraphic units separated by two extensional detachment faults: a schist complex, a middle ductile slab and an overlying sedimentary unit. The schist complex is composed of quartz-mica schists and amphibolites of possible Mesoproterozoic age and exhibits two early foliations (S 1 S 2) overprinted by two later foliations (S 3 S 4). The ductilely deformed middle slab consists of Paleozoic quartzite, phyllite, marble, amphibolite and meta-basalt. It is characterized by pervasive intrafolial and intraformational recumbent folds with a penetrative axial foliation S′ 1 (an equivalent of S 3 in the basement rocks). The cover unit, the Triassic Xikang Group of flysch sedimentary rocks, experienced shallow level buckling and flattening deformation with an axial cleavage defining S″ 1 (an equivalent of S 4 in the middle slab and basement rocks). The JTD appears to have experienced three stages of extension immediately after orogeny. The earliest (D 1), recorded by an axial surface S 1 of S 0 intrafolial folds and sub-parallel to S 0 in the schist complex, probably occurred prior to the collision between the South China and North China Blocks. This extensional event was followed by subduction of the Yangtze Block to the west towards the eastern margin of the Tibetan Plateau. The two detachment faults are characterized by structures formed by ductile-brittle to brittle shear deformation, which are sub-parallel to the layer of S 2 in the lower detachment and to S 0 in the upper detachment. These faults mark the second stage of extension and may have caused thinning and selective removal of the Sinian and Paleozoic strata, as well as exhumation of the schist complex and the middle slab in the middle Jurassic (177 Ma). The final stage of extension (D 5), shown by brittle deformation and thermo-metamorphism from the lower detachment to the Xikang Group, was associated with the Indian-Eurasia collision. © 2002 Elsevier Science Ltd.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jsgen_US
dc.relation.ispartofJournal of Structural Geologyen_US
dc.subjectDuctile Slaben_US
dc.subjectJianglang Tectonic Domeen_US
dc.subjectSchist Complexen_US
dc.subjectSedimentary Uniten_US
dc.subjectSouth Chinaen_US
dc.subjectTibeten_US
dc.titleStructural style and tectonic significance of the Jianglang dome in the eastern margin of the Tibetan Plateau, Chinaen_US
dc.typeArticleen_US
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_US
dc.identifier.authorityZhou, MF=rp00844en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0191-8141(02)00059-7en_US
dc.identifier.scopuseid_2-s2.0-0242600560en_US
dc.identifier.hkuros82626-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0242600560&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume25en_US
dc.identifier.issue5en_US
dc.identifier.spage765en_US
dc.identifier.epage779en_US
dc.identifier.isiWOS:000181547900008-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridYan, DP=36683417500en_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_US
dc.identifier.scopusauthoridSong, H=47261333700en_US
dc.identifier.scopusauthoridFu, Z=7403347778en_US
dc.customcontrol.immutablesml 130308-

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