"Rifting and sedimentary basin formation in the Conjugate continental Margin" is one of the most important issues of major international researches, and is also the key content of the 973 project “The dynamics and potential petroleum resources in the South China Sea continental margin”. This 973 project is focused on the three-dimensional lithospheric structure, deformation characters, and the evolution of conjugate continental margin of South China Sea, and provides the geophysical evidences for the discrepancy of deep dynamics.

　  The seismic tomographic research in South China Sea and its adjacent regions is one important way to study the three-dimensional lithospheric structure and its dynamic characters. Due to the absence of seismic data and the uneven of ray path samples in western South China Sea, the Key Laboratory of Petroleum Geophysics (KLPG) intends to deploy the temporary broadband seismic stations in Natuna Islands of Indonesia and Indo-China Peninsula, for one to two years observation under the supported of 973 project. With the assistance of China Earthquake Administration and the temporary seismic network of IGGCAS, KLPG and Department of Meteorology and Hydrology of Lao PDR (DMH) signed the cooperation agreement. Duing Feb. 26 to Mar. 7 2009, Hao Tianyao, Xu Yi, Li Zhiwei, Xu Ya of KLPG deployed the temporary seismic station (No. 972-2) in the Pakse city, Champasak Province, southern Laos (14.11°N，105.87°E). The seismograph and acquisition system are long-period broadband CMG-3ESP (50Hz – 30 sec), and RefTek 130, respectively. This deployment is the first step for temporary seismic observation surrounding South China Sea. The 18 months long period observation, lower environmental noise will provide the important sharing observation-research platform for the continental marginal tectonic research of South China Sea. Moreover, the temporary seismic station (No. 973-3) in Natuna Islands of Indonesia will be deployed soon by the Second Institute of Oceanography under the State Oceanic Administration.

The pushpin in the figure shows the position of temporary seismic station.

 

This work was supported by the National Basic Research Program of China (973 Project) (Grant No. 2007CB411701)