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Article: Paleoproterozoic structural evolution of the southern segment of the Jiao-Liao-Ji Belt, North China Craton

TitlePaleoproterozoic structural evolution of the southern segment of the Jiao-Liao-Ji Belt, North China Craton
Authors
KeywordsAmphibolite
Basement rock
Compression
Continental collision
Continental margin
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2012, v. 200-203, p. 59-73 How to Cite?
AbstractThe Paleoproterozoic Jiao-Liao-Ji Belt separates the Eastern Block of the North China Craton into two small sub-blocks: the northern Longgang and the southern Rangrim blocks. However, it still remains unknown or controversial about the subduction polarity, collisional deformation and kinematics between two sub-blocks. The southern segment of the belt consists of the Paleoproterozoic Fenzishan and Jingshan groups, and Paleoproterozoic high pressure mafic granulites and serpentinites blocks which are located in the Jiaodong Complex. All of which are separated from the Jiaodong Complex of Neoarchean TTG gneisses by STZ1 ductile shear zones. Structural analysis in this study indicates that most of the rocks in all the units of the southern segment of the Jiao-Liao-Ji Belt underwent three distinct episodes of folding (D 1 to D 3) and two stage of ductile thrust shearing (STZ 1 coeval to D 1 and D 2, STZ 2 between D 2 and D 3). The D 1 deformation formed penetrative axial planar foliations (S 1), bedding-parallel ductile shear zone, mineral stretching lineations (L 1), and rarely preserved small isoclinal D 1 folds in the Jingshan and Fenzishan groups. In the Jingshan Group, however, penetrative deformational transposition resulted in stacking of sedimentary compositional layers which are separated by bedding-parallel ductile shear zones (STZ 1) at a period of about 1956Ma to 1914Ma. The kinematic indicators of STZ 1 in the Jingshan Group with resultant prograde peak metamorphism up to granulite facies grade and the Fenzishan Group with peak metamorphism up to amphibolite facies grade indicate NW-directed compression. D 2 resulted in crustal thickening with retrograded medium pressure granulite facies grade at about 1914-1893Ma. The D 2 deformation produced NW-verging asymmetric and recumbent folds, interpreted to have resulted from basement-involved thicken-skin structures. The Jiaodong Complex was also involved into the development of WNW-verging asymmetric tight folds associated with D 2 in the Jingshan and the Fenzishan groups. Ongoing collision led to the development of transpressional ductile shearing (STZ 2), forming the transpressional Taipingzhuang dextral ductile shear zone between the Jingshan Group and the southern Archean Complex and the transpressional Tading-Xiadian sinistral ductile shear zone between the Jingshan Group and the northern Archean Complex. All three lithotectonic units were superposed during the late D 3 deformation with amphibolite facies metamorphism. The D 3 deformation developed WNW-trending open to tight upright folds at about 1893-1875Ma. The structural pattern resulting from superimposition of D 2 and D 3 is a composite synform in the Fenzishan and Jingshan groups. The structural events of D 1 and STZ 1, and D 2 and STZ 2 deformation were possibly responsible for fast syn-collisional exhumation of the high pressure mafic granulites. The structural patterns and deformational history of the Fenzishan and Jingshan groups suggest a southeastward-directed oblique subduction beneath the northwestern margin of the Rangrim Block, and that the final scissor-shaped closure of the rift led to collision between the two blocks to form the coherent basement of the Eastern Block of the North China Craton. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/151358
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID
Funding AgencyGrant Number
NSFC41072152
41190072
China Geological Survey Bureau1212011120103
S863 key program2009AA093401
Funding Information:

This research was funded by the NSFC project (Grants 41072152 and 41190072), the China Geological Survey Bureau project (1212011120103) and the S863 key program (2009AA093401). We thank Prof. Wenjiao Xiao and one anonymous reviewer for their constructive comments.

 

DC FieldValueLanguage
dc.contributor.authorLi, Sen_US
dc.contributor.authorZhao, Gen_US
dc.contributor.authorSantosh, Men_US
dc.contributor.authorLiu, Xen_US
dc.contributor.authorDai, Len_US
dc.contributor.authorSuo, Yen_US
dc.contributor.authorTam, PYen_US
dc.contributor.authorSong, Men_US
dc.contributor.authorWang, Pen_US
dc.date.accessioned2012-06-26T06:21:05Z-
dc.date.available2012-06-26T06:21:05Z-
dc.date.issued2012en_US
dc.identifier.citationPrecambrian Research, 2012, v. 200-203, p. 59-73en_US
dc.identifier.issn0301-9268en_US
dc.identifier.urihttp://hdl.handle.net/10722/151358-
dc.description.abstractThe Paleoproterozoic Jiao-Liao-Ji Belt separates the Eastern Block of the North China Craton into two small sub-blocks: the northern Longgang and the southern Rangrim blocks. However, it still remains unknown or controversial about the subduction polarity, collisional deformation and kinematics between two sub-blocks. The southern segment of the belt consists of the Paleoproterozoic Fenzishan and Jingshan groups, and Paleoproterozoic high pressure mafic granulites and serpentinites blocks which are located in the Jiaodong Complex. All of which are separated from the Jiaodong Complex of Neoarchean TTG gneisses by STZ1 ductile shear zones. Structural analysis in this study indicates that most of the rocks in all the units of the southern segment of the Jiao-Liao-Ji Belt underwent three distinct episodes of folding (D 1 to D 3) and two stage of ductile thrust shearing (STZ 1 coeval to D 1 and D 2, STZ 2 between D 2 and D 3). The D 1 deformation formed penetrative axial planar foliations (S 1), bedding-parallel ductile shear zone, mineral stretching lineations (L 1), and rarely preserved small isoclinal D 1 folds in the Jingshan and Fenzishan groups. In the Jingshan Group, however, penetrative deformational transposition resulted in stacking of sedimentary compositional layers which are separated by bedding-parallel ductile shear zones (STZ 1) at a period of about 1956Ma to 1914Ma. The kinematic indicators of STZ 1 in the Jingshan Group with resultant prograde peak metamorphism up to granulite facies grade and the Fenzishan Group with peak metamorphism up to amphibolite facies grade indicate NW-directed compression. D 2 resulted in crustal thickening with retrograded medium pressure granulite facies grade at about 1914-1893Ma. The D 2 deformation produced NW-verging asymmetric and recumbent folds, interpreted to have resulted from basement-involved thicken-skin structures. The Jiaodong Complex was also involved into the development of WNW-verging asymmetric tight folds associated with D 2 in the Jingshan and the Fenzishan groups. Ongoing collision led to the development of transpressional ductile shearing (STZ 2), forming the transpressional Taipingzhuang dextral ductile shear zone between the Jingshan Group and the southern Archean Complex and the transpressional Tading-Xiadian sinistral ductile shear zone between the Jingshan Group and the northern Archean Complex. All three lithotectonic units were superposed during the late D 3 deformation with amphibolite facies metamorphism. The D 3 deformation developed WNW-trending open to tight upright folds at about 1893-1875Ma. The structural pattern resulting from superimposition of D 2 and D 3 is a composite synform in the Fenzishan and Jingshan groups. The structural events of D 1 and STZ 1, and D 2 and STZ 2 deformation were possibly responsible for fast syn-collisional exhumation of the high pressure mafic granulites. The structural patterns and deformational history of the Fenzishan and Jingshan groups suggest a southeastward-directed oblique subduction beneath the northwestern margin of the Rangrim Block, and that the final scissor-shaped closure of the rift led to collision between the two blocks to form the coherent basement of the Eastern Block of the North China Craton. © 2012 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_US
dc.relation.ispartofPrecambrian Researchen_US
dc.subjectAmphibolite-
dc.subjectBasement rock-
dc.subjectCompression-
dc.subjectContinental collision-
dc.subjectContinental margin-
dc.titlePaleoproterozoic structural evolution of the southern segment of the Jiao-Liao-Ji Belt, North China Cratonen_US
dc.typeArticleen_US
dc.identifier.emailZhao, G: gzhao@hkucc.hku.hken_US
dc.identifier.emailTam, PY: lisanzhong@gmail.com-
dc.identifier.authorityZhao, G=rp00842en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.precamres.2012.01.007en_US
dc.identifier.scopuseid_2-s2.0-84862802997-
dc.identifier.hkuros204271-
dc.identifier.volume200-203en_US
dc.identifier.spage59en_US
dc.identifier.epage73en_US
dc.identifier.isiWOS:000302593700004-
dc.publisher.placeNetherlandsen_US
dc.identifier.citeulike10348697-

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