FN Archimer Export Format
PT J
TI PostSeafloor Spreading Volcanism in the Central East South China Sea and its Formation Through an Extremely Thin Oceanic Crust
BT 
AF ZHAO, Minghui
   HE, Enyuan
   SIBUET, Jean-Claude
   SUN, Longtao
   QIU, Xuelin
   TAN, Pingchuan
   WANG, Jian
AS 1:1;2:1;3:2;4:1;5:1;6:3;7:4;
FF 1:;2:;3:PDG-REM-GM-LAD;4:;5:;6:;7:;
C1 Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China.
   Ifremer Ctr Brest, 44 Rue Cloitre, Plouzane, France.
   Univ Oslo, Ctr Earth Evolut & Dynam, Oslo, Norway.
   South Univ Sci & Technol China, Dept Ocean Sci & Engn, Shenzhen, Peoples R China.
C2 CHINESE ACAD SCI, CHINA
   IFREMER, FRANCE
   UNIV OSLO, NORWAY
   SOUTH UNIV SCI & TECHNOL CHINA, CHINA
SI BREST
SE PDG-REM-GM-LAD
IN WOS Ifremer jusqu'en 2018
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 2.946
TC 56
UR https://archimer.ifremer.fr/doc/00427/53882/54951.pdf
LA English
DT Article
AB P-wave velocity models were obtained by forward and inverse modeling from 38 ocean bottom seismometers deployed in the central East sub-basin of the South China Sea (SCS). Four types of crust have been defined; a) thin oceanic crust (<5 km), b) typical oceanic crust (5-6 km), c) thick oceanic crust hosting post-spreading volcanoes (>6 km) with significant intrusive roots, and d) thick oceanic crust with enhanced spreading features (>6 km) but without significant roots. Within the central East sub-basin, the thin oceanic crust, only identified inside a 80-km wide zone, is located within an overall 150-km wide domain characterized by N055° seafloor spreading trends. The post-spreading volcanoes were formed during a N-S tensional episode around 6-10 Ma, several millions of years after seafloor spreading ceased in the SCS. Seafloor spreading (N055° and N145°) and post-spreading (N000° and N090°) features are observed in the morphology of some of these volcanoes. The rupture of the brittle thin oceanic crust was focused where the crust was the weakest, i.e. at the intersection of the extinct spreading ridge with former fracture zones. From geological and geophysical arguments, we suggest that the post-spreading volcanism might have been influenced by the Hainan plume activity through a buoyancy-driven partial melting mechanism. 
PY 2018
PD MAR
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 19
IS 3
UT 000433289500004
BP 621
EP 641
DI 10.1002/2017GC007034
ID 53882
ER

EF