Distribution and identification of the low-velocity layer in the northern South China Sea

2007 ◽  
Vol 17 (5) ◽  
pp. 591-600 ◽  
Author(s):  
Zhao Minghui ◽  
Qiu Xuelin ◽  
Xu Huilong ◽  
Shi Xiaobin ◽  
Wu Shimin ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Northern South China Sea ◽  
Low Velocity ◽  
China Sea ◽  
Low Velocity Layer ◽  
Velocity Layer

Detection of a Thick and Weak Low‐Velocity Layer atop the Mantle Transition Zone beneath the Northeastern South China Sea from Triplicated P‐Wave Waveform Modeling

2019 ◽  
Vol 109 (4) ◽  
pp. 1181-1193 ◽  
Author(s):  
Guohui Li ◽  
Yunyue Elita Li ◽  
Heng Zhang ◽  
Ling Bai ◽  
Lin Ding ◽  
...  
Keyword(s):  
South China Sea ◽  
Transition Zone ◽  
South China ◽  
P Wave ◽  
Low Velocity ◽  
Mantle Transition Zone ◽  
P Wave Velocity ◽  
Low Velocity Layer ◽  
Northeastern South China Sea ◽  
Velocity Layer

Abstract Triplicated P waveforms related to the 410‐km discontinuity from five intermediate‐depth earthquakes in the central Philippines are clearly recorded by the Chinese Digital Seismic Network, but some branches of the S‐wave triplications are obscure. Matching the observed P‐wave triplications with synthetics through a grid‐search technique, we obtain the best‐fit 1D P‐wave velocity model near the 410‐km discontinuity beneath the northeastern South China Sea. In such a model, a low‐velocity layer (LVL) is found to reside atop the mantle transition zone, and it is characterized by a thickness of 92.5±11.5  km and a P‐wave velocity decrement of 1.5%±0.1% compared with the IASP91 model. The relatively thick and weak LVL is possibly a response of a small amount of remnant hydrous partial melts after plume‐like upwelling.

GEOPHYSICAL RESPONSE OF THE LIUHUA CARBONATE PLATFORM IN NORTHERN SOUTH CHINA SEA

2011 ◽  
Vol 31 (4) ◽  
pp. 105-112
Author(s):  
Guangxu ZHANG ◽  
Shiguo WU ◽  
Weilin ZHU ◽  
Hesheng SHI ◽  
Duanxin CHEN
Keyword(s):  
South China Sea ◽  
South China ◽  
Carbonate Platform ◽  
Northern South China Sea ◽  
China Sea
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