FN Archimer Export Format
PT J
TI 3D seismic structure of the Zhenbei-Huangyan seamounts chain in the East Sub-basin of the South China Sea and its mechanism of formation
BT 
AF WANG, Jian
   ZHAO, Minghui
   QIU, Xuelin
   SIBUET, Jean-Claude
   HE, Enyuan
   ZHANG, Jiazheng
   TAO, Chunhui
AS 1:1,5;2:1;3:1;4:2,3;5:1,5;6:1;7:4;
FF 1:;2:;3:;4:PDG-REM-GM-LAD;5:;6:;7:;
C1 Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
   IFREMER, Ctr Brest, Plouzane, France.
   44 Rue Cloitre, Plouzane, France.
   State Ocean Adm, Inst Oceanog 2, Hangzhou, Zhejiang, Peoples R China.
   Univ Chinese Acad Sci, Beijing, Peoples R China.
C2 CHINESE ACAD SCI, CHINA
   IFREMER, FRANCE
   44 Rue Cloitre, Plouzane, France.
   STATE OCEAN ADM, 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 2.978
TC 12
UR https://archimer.ifremer.fr/doc/00314/42515/44989.pdf
LA English
DT Article
DE ;extinct spreading ridge;Zhenbei-Huangyan seamounts chain;3D seismic structure;post-spreading magmatism;East Sub-basin;South China Sea
AB The probable N055°-oriented extinct spreading ridge of the East Sub-basin is cut across by the post-spreading volcanic ridge oriented approximately E–W in its western part and called the Zhenbei–Huangyan seamounts chain. A three-dimensional ocean bottom seismometer survey was conducted in 2011 and covered both the extinct spreading ridge and the Zhenbei–Huangyan seamounts chain in the East Sub-basin. The comprehensive seismic record sections of 39 ocean bottom seismometers underline the high-quality data with clear and reliable P-wave seismic first arrivals. The three-dimensional tomographic results show that the crust is oceanic on each side of the Zhenbei–Huangyan seamounts chain. The seafloor spreading lineaments and associated fracture zones pattern provide channels for magma migration and eruption. Based on the ratio of volcanic extrusive and intrusive materials and the shape of the upward convex 6.4 km/s iso-velocity curve beneath the Zhenbei and Huangyan seamounts, we conclude that the Zhenbei and Huangyan seamounts appear to be dominantly formed by intra-crustal intrusion. Combining previous geochemical studies of post-spreading volcanic ridge outcropping samples, the formation mechanism of the seamounts chain might be explained by a buoyancy-driven decompression melting mechanism occurring as separately evolving partial melting bodies beneath each seamount.
PY 2016
PD AUG
SO Geological Journal
SN 0072-1050
PU Wiley-blackwell
VL 51
UT 000383513600032
BP 448
EP 463
DI 10.1002/gj.2781
ID 42515
ER

EF