Lithospheric structure variations between the eastern and central North China Craton from S- and P-receiver function migration

Abstract I imaged the lithospheric structure beneath the Bohai Bay Basin (BBB) in the eastern North China Craton (NCC) and the Taihang Mountains (TM) and areas further to the west in the central NCC by applying the wave equation migration technique to both the S- and P-receiver functions (RFs) collected in this region. The data images and synthetic modeling results indicate that S-RF imaging is more appropriate than P-RF imaging for mapping lithospheric discontinuities, especially the lithosphere-asthenosphere boundary (LAB) in various types of regions, even directly applicable to basin areas that are covered by thick sediments. The constructed S-RF images show that the lithospheric thickness of the study region is highly variable. The imaged LAB is on average ∼80 km beneath the BBB, and displays obvious undulations from ∼120 km under the TM to 40 km) under the mountain areas in the central NCC, consistent with previous P-RF imaging results. The observed structural differences between the eastern and central NCC are likely associated with different lithospheric tectonics in these two regions. While widespread lithosphere reactivation and extension in the eastern NCC during the late Mesozoic time was plausibly responsible for both the thinned crust and lithosphere in the BBB, lithospheric thinning in the central NCC may be equally heterogeneous but less significant, and probably occurred mainly in Cenozoic. Such a process may have given rise to the highly variable present-day lithospheric thickness in this region. However, it probably did not noticeably affect the overlying crust that was reported to have thickened in response to the early magmatic underplating in the Mesozoic time. The different tectonic processes in the eastern and central NCC may have induced the formation of the NSGL, which likely serves as a major tectonic boundary separating the two regions of contrasting lithospheric structures at present.

[1]  Yan Zhong-qiong.  THE STRUCTURE OF LITHOSPHERE IN EURASIA AND WEST PACIFIC , 2004 .

[2]  Q. Fan,et al.  Zircon chronology and REE geochemistry of granulite xenolith at Hannuoba , 1998 .

[3]  L. Wen,et al.  A two-dimensional PSV hybrid method and its application to modeling localized structures near the core-mantle boundary , 2007 .

[4]  Sun-Lin Chung,et al.  Mantle dynamics and plate interactions in East Asia , 1998 .

[5]  Liang Zhao,et al.  A detailed receiver function image of the sedimentary structure in the Bohai Bay Basin , 2005 .

[6]  Shenghong Hu,et al.  Geochemistry of lower crustal xenoliths from Neogene Hannuoba basalt, North China craton: implications for petrogenesis and lower crustal composition , 2001 .

[7]  K. Fleming,et al.  The lithosphere–asthenosphere boundary in the North-West Atlantic region , 2005 .

[8]  Menzies,et al.  ON- AND OFF- THE NORTH CHINA CRATON: WHERE IS THE ARCHAEAN KEEL? , 1999 .

[9]  Yigang Xu,et al.  Thermo-tectonic destruction of the archaean lithospheric keel beneath the sino-korean craton in china: evidence, timing and mechanism , 2001 .

[10]  R. Kind,et al.  The lithosphere–asthenosphere boundary beneath the western United States , 2006 .

[11]  Hsing-yüan Ma.  Lithospheric dynamics map of China and adjacent seas , 1986 .

[12]  R. Carlson,et al.  Re-Os evidence for replacement of ancient mantle lithosphere beneath the North China Craton , 2002 .

[13]  B. Kennett,et al.  Traveltimes for global earthquake location and phase identification , 1991 .

[14]  G. Wittlinger,et al.  Converted waves reveal a thick and layered tectosphere beneath the Kalahari super-craton , 2007 .

[15]  Jinlong Ma,et al.  Contrasting Cenozoic Lithospheric Evolution and Architecture in the Western and Eastern Sino‐Korean Craton: Constraints from Geochemistry of Basalts and Mantle Xenoliths , 2004, The Journal of Geology.

[16]  Benren Zhang,et al.  Chemical composition of the continental crust as revealed by studies in East China , 1998 .

[17]  S. Min,et al.  Highly heterogeneous Late Mesozoic lithospheric mantle beneath the North China Craton: evidence from Sr–Nd–Pb isotopic systematics of mafic igneous rocks , 2004, Geological Magazine.

[18]  L. Wen,et al.  A Wave Equation Migration Method for Receiver Function Imaging , 2004 .

[19]  M. Weber,et al.  Receiver function arrays: a reflection seismic approach , 2000 .

[20]  Ling Chen,et al.  Structure of the crust and uppermost mantle of the Yanshan Belt and adjacent regions at the northeastern boundary of the North China Craton from Rayleigh Wave Dispersion Analysis , 2008 .

[21]  Hong‐fu Zhang,et al.  Petrology and geochemistry of Zijinshan alkaline intrusive complex in Shanxi Province, western North China Craton: Implication for magma mixing of different sources in an extensional regime , 2007 .

[22]  Hazel Margaret Prichard,et al.  Magmatic processes and plate tectonics , 1993 .

[23]  R. Kind,et al.  Rejuvenation of the lithosphere by the Hawaiian plume , 2003, Nature.

[24]  S. Wilde,et al.  Nature and significance of the Early Cretaceous giant igneous event in eastern China , 2005 .

[25]  J. Baker,et al.  On and Off the North China Craton: Where is the Archaean Keel? , 2000 .

[26]  Yigang Xu.  Diachronous lithospheric thinning of the North China Craton and formation of the Daxin'anling–Taihangshan gravity lineament , 2007 .

[27]  A. Nutman,et al.  Remnants of ≥3800 Ma crust in the Chinese part of the Sino-Korean craton , 1992 .

[28]  Ling Chen,et al.  A thinned lithospheric image of the Tanlu Fault Zone, eastern China: Constructed from wave equation based receiver function migration , 2006 .

[29]  G. Chen,et al.  THREE-DIMENSIONAL CRUST AND UPPER MANTLE STRUCTURE OF THE NORTH CHINA REGION , 1991 .

[30]  R. Zhu,et al.  Crust-mantle structure difference across the gravity gradient zone in North China Craton; seismic image of the thinned continental crust , 2006 .

[31]  K. Priestley,et al.  Lithospheric structure of the Aegean obtained from P and S receiver functions , 2006 .

[32]  W. Fan,et al.  Early Cretaceous gabbroic rocks from the Taihang Mountains: Implications for a paleosubduction-related lithospheric mantle beneath the central North China Craton , 2006 .

[33]  Liang Zhao,et al.  Distinct lateral variation of lithospheric thickness in the Northeastern North China Craton , 2008 .

[34]  M. Menzies,et al.  Integration of geology, geophysics and geochemistry: A key to understanding the North China Craton , 2007 .

[35]  M. Sun,et al.  Continental crust and lithospheric mantle interaction beneath North China: isotopic evidence from granulite xenoliths in Hannuoba, Sino-Korean craton , 2002 .

[36]  W. Griffin,et al.  Relict refractory mantle beneath the eastern North China block: significance for lithosphere evolution , 2001 .

[37]  Ling Chen,et al.  Receiver function migration image of the deep structure in the Bohai Bay Basin, eastern China , 2006 .

[38]  W. Griffin,et al.  3.6 Ga lower crust in central China: New evidence on the assembly of the North China craton , 2004 .

[39]  Walter D. Mooney,et al.  Crustal structure of China from deep seismic sounding profiles , 1998 .

[40]  S. Wilde,et al.  Mesozoic crust-mantle interaction beneath the North China craton: A consequence of the dispersal of Gondwanaland and accretion of Asia , 2003 .

[41]  M. Menzies,et al.  Palaeozoic and Cenozoic lithoprobes and the loss of >120 km of Archaean lithosphere, Sino-Korean craton, China , 1993, Geological Society, London, Special Publications.

[42]  Shengbiao Hu,et al.  Heat flow in the continental area of China: a new data set , 2000 .

[43]  S. Qian,et al.  Magma underplating and Hannuoba present crust-mantle transitional zone composition: Xenolith petrological and geochemical evidence , 2005 .

[44]  Hong‐fu Zhang,et al.  Asthenosphere–lithospheric mantle interaction in an extensional regime: Implication from the geochemistry of Cenozoic basalts from Taihang Mountains, North China Craton , 2006 .

[45]  Donald V. Helmberger,et al.  A two-dimensional P-SV hybrid method and its application to modeling localized structures near the core-mantle boundary , 1998 .