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Article: Constraints on the depth, geometry and kinematics of blind detachment faults provided by fault-propagation folds: An example from the Mesozoic fold belt of South China

TitleConstraints on the depth, geometry and kinematics of blind detachment faults provided by fault-propagation folds: An example from the Mesozoic fold belt of South China
Authors
KeywordsBlind thrust fault
Fault geometry
Fold parameter
Mesozoic fold belt
Out-of-sequence and in-sequence duplex
South China
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jsg
Citation
Journal Of Structural Geology, 2009, v. 31 n. 2, p. 150-162 How to Cite?
AbstractThe Mesozoic multi-layered thin-skinned, fault-related fold belt in South China is characterized by propagation chevron folding and thrust faulting. We examine the geometry and depth of blind detachment faults in this belt using faults and folds that crop out along a well-defined cross-section. A combination of parameters such as backlimb dip angle (2θ), interlimb angle (γ), height of anticline (h), thickness of the referenced layer (h 0), width of the anticline (AB) and thickness-change ratio of layering within the forelimb (t f/t) are used to develop new equations to estimate the geometry and depth of the detachment faults. In the cross-section, the Huangdushan chevron anticline has parameters revealing a blind fault with a ramp angle of 42° and a flattened segment at a depth of 4.9 km. Based on existing seismic data, we interpret this blind fault as a backthrust developed over an in-sequence imbricated duplex of Cambrian to Ordovician strata. A chevron anticline at Qiyueshan also reveals a backthrust fault. However, a broad anticline in Lengzhuba and a small cylindrical, sinusoidal anticline in Yupize reveal a flat-ramp-flat detachment fault with flat segments at depths of 7.4 and 3.4 km, respectively, suggesting that the Sinian strata were thickened probably by an out-of-sequence imbricated duplex. Our results indicate that the flat-ramp-flat detachment fault along the bottom of the Sinian strata produced the out-of-sequence imbricated duplex and cylindrical sinusoidal folds. The in-sequence imbricated duplex produced backthrusts and related chevron anticlines. We consider that this fault-related fold belt was produced by collision between the Yangtze Block and North China Blocks. © 2008 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/58690
ISSN
2015 Impact Factor: 2.084
2015 SCImago Journal Rankings: 1.648
ISI Accession Number ID
Funding AgencyGrant Number
NSFC40434011
40621002
40872140
111 ProjectB07011
National Basic Research Program of China2009CB421001
China Petroleum and Chemical CooperationCPCC09-01
IRT0546
Funding Information:

This study was supported by research grants from the NSFC (Projects 40434011, 40621002 and 40872140), IRT0546 and the 111 Project (No. B07011) National Basic Research Program of China (2009CB421001) and China Petroleum and Chemical Cooperation (CPCC09-01). We thank P.T. Robinson for enlightening discussions and for his assistance throughout this study. We thank Prof. Ding Daogui for providing seismic data and discussions. We thank Andreas Plesch and an anonymous referee for thorough reviews that helped improve this paper and they are gratefully acknowledged.

References

 

DC FieldValueLanguage
dc.contributor.authorYan, DPen_HK
dc.contributor.authorZhang, Ben_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorWei, Gen_HK
dc.contributor.authorSong, HLen_HK
dc.contributor.authorLiu, SFen_HK
dc.date.accessioned2010-05-31T03:35:05Z-
dc.date.available2010-05-31T03:35:05Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of Structural Geology, 2009, v. 31 n. 2, p. 150-162en_HK
dc.identifier.issn0191-8141en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58690-
dc.description.abstractThe Mesozoic multi-layered thin-skinned, fault-related fold belt in South China is characterized by propagation chevron folding and thrust faulting. We examine the geometry and depth of blind detachment faults in this belt using faults and folds that crop out along a well-defined cross-section. A combination of parameters such as backlimb dip angle (2θ), interlimb angle (γ), height of anticline (h), thickness of the referenced layer (h 0), width of the anticline (AB) and thickness-change ratio of layering within the forelimb (t f/t) are used to develop new equations to estimate the geometry and depth of the detachment faults. In the cross-section, the Huangdushan chevron anticline has parameters revealing a blind fault with a ramp angle of 42° and a flattened segment at a depth of 4.9 km. Based on existing seismic data, we interpret this blind fault as a backthrust developed over an in-sequence imbricated duplex of Cambrian to Ordovician strata. A chevron anticline at Qiyueshan also reveals a backthrust fault. However, a broad anticline in Lengzhuba and a small cylindrical, sinusoidal anticline in Yupize reveal a flat-ramp-flat detachment fault with flat segments at depths of 7.4 and 3.4 km, respectively, suggesting that the Sinian strata were thickened probably by an out-of-sequence imbricated duplex. Our results indicate that the flat-ramp-flat detachment fault along the bottom of the Sinian strata produced the out-of-sequence imbricated duplex and cylindrical sinusoidal folds. The in-sequence imbricated duplex produced backthrusts and related chevron anticlines. We consider that this fault-related fold belt was produced by collision between the Yangtze Block and North China Blocks. © 2008 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jsgen_HK
dc.relation.ispartofJournal of Structural Geologyen_HK
dc.subjectBlind thrust faulten_HK
dc.subjectFault geometryen_HK
dc.subjectFold parameteren_HK
dc.subjectMesozoic fold belten_HK
dc.subjectOut-of-sequence and in-sequence duplexen_HK
dc.subjectSouth Chinaen_HK
dc.titleConstraints on the depth, geometry and kinematics of blind detachment faults provided by fault-propagation folds: An example from the Mesozoic fold belt of South Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0191-8141&volume=31&issue=2&spage=150&epage=162&date=2009&atitle=Constraints+on+the+depth,+geometry+and+kinematics+of+blind+detachment+faults+provided+by+fault-propagation+folds:+An+example+from+the+Mesozoic+fold+belt+of+South+Chinaen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jsg.2008.11.005en_HK
dc.identifier.scopuseid_2-s2.0-59349100004en_HK
dc.identifier.hkuros167323en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-59349100004&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume31en_HK
dc.identifier.issue2en_HK
dc.identifier.spage150en_HK
dc.identifier.epage162en_HK
dc.identifier.isiWOS:000264085000005-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridYan, DP=36683417500en_HK
dc.identifier.scopusauthoridZhang, B=49261296300en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridWei, G=25025250700en_HK
dc.identifier.scopusauthoridSong, HL=47261333700en_HK
dc.identifier.scopusauthoridLiu, SF=49261093400en_HK

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