FN Archimer Export Format
PT J
TI Geophysical constraints on the lithospheric structure in the northeastern South China Sea and its implications for the South China Sea geodynamics
BT 
AF LIU, Siqing
   ZHAO, Minghui
   SIBUET, Jean-Claude
   QIU, Xuelin
   WU, Jonny
   ZHANG, Jiazheng
   CHEN, Chuanxu
   XU, Ya
   SUN, Longtao
AS 1:1,6;2:1;3:1,2;4:1,6;5:3;6:1;7:4;8:5;9:1;
FF 1:;2:;3:PDG-REM-GM-LAD;4:;5:;6:;7:;8:;9:;
C1 Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
   IFREMER, Ctr Brest, F-29280 Plouzane, France.
   Univ Houston, Dept Earth & Atmospher Sci, Sci & Res Bldg 1,3507 Cullen Blvd, Houston, TX 77204 USA.
   Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China.
   Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China.
   Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
C2 CHINESE ACAD SCI, CHINA
   IFREMER, FRANCE
   UNIV HOUSTON, USA
   CHINESE ACAD SCI, CHINA
   CHINESE ACAD SCI, CHINA
   UNIV CHINESE ACAD SCI, CHINA
SI BREST
SE PDG-REM-GM-LAD
IN WOS Ifremer jusqu'en 2018
   copubli-int-hors-europe
   copubli-sud
IF 2.764
TC 32
UR https://archimer.ifremer.fr/doc/00443/55458/56974.pdf
LA English
DT Article
DE ;Northeastern South China Sea;Continent-ocean boundary (COB);Wide-angle reflection/refraction data;Thinned continental crust intruded by post-rifting volcanism;Taiwan transfer zone (TTZ)
AB An E-W oriented OBS2015-2 wide-angle refraction profile was shot in the northeastern South China Sea (SCS) between refraction profiles T1 and T2 in order to better understand the variability of the crustal composition and the role of specific tectonic features. P-wave velocity models established from forward and inversion modeling imaged a 12 to 15 km-thick thinned continental crust and a high velocity layer (HVL) in the lower crust which is interpreted as magmatic underplating. Profile OBS2015-2 cut across the Taiwan transfer zone (TTZ), which separates two consecutive rifted segments of different orientations in the northeastern SCS. The TTZ is a well-defined upper crustal feature characterized by a HVL with different thickness on both sides. We have defined the southward limit of the thinned continental domain with the typical oceanic domain as a continent-ocean boundary (COB). The COB between the drilling area of IODP legs 367–368 to the Manila trench is characterized by a sharp contrast between the low amplitude, irregular shape magnetic anomalies and the high amplitude, elongated shape magnetic anomalies, which are associated with the thinned continental domain and the oceanic domain, respectively. We further extend the COB into the 400 to 500 km wide unfolded Manila slab located east of the Manila trench by using mid-slab dVp tomographic velocities to define the boundary between subducted oceanic and thinned continental crust. The location of the reconstructed northeast SCS COB appears to step northwards toward Taiwan across a 400 km N-S segment, providing new constraints on SCS geodynamics at the end of spreading and its later tectonic evolution. 
PY 2018
PD SEP
SO Tectonophysics
SN 0040-1951
PU Elsevier Science Bv
VL 742-743
UT 000445168100007
BP 101
EP 119
DI 10.1016/j.tecto.2018.06.002
ID 55458
ER

EF