Analysis and processing on abnormal OBS data in the South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Analysis and processing on abnormal OBS data in the South China Sea
	Wang Qiang; Qiu Xue-Lin; Zhao Ming-Hui; Huang Hai-Bo; Ao Wei
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2016
卷号	59 期号:3 页码:1102-1112
关键词	Abnormal data processing Ocean bottom seismometer (OBS) Data format conversion Wide-angle reflected/refracted seismic experiment The South China Sea
通讯作者	Qiang, W ; Zhao, MH (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China. ; Qiang, W (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
中文摘要	Processing and analysis on ocean bottom seismometer (OBS) data are of great importance to obtain the deep crustal structure. The deep seismic profile OBS2006-2 was carried out in 2006 along the extinct spreading ridge of the Northwest sub-basin of the South China Sea. This survey is successful to provide high quality data whose seismic signals can be observed at the offset of up to 120 km but 2 OBSs' recording data (OBS03 and OBS06) cannot be read correctly and not used in later structure modeling. However, OBS data are very precious due to the high cost and arduous work. The price is more expensive when encountering severe weather during a survey. This paper is focused on reprocessing on these 2 OBSs' data by use of the methods of checking data format, comparing signals with adjacent OBSs and resampling the data. Finally we acquire these 2 OBSs' seismic record sections in which abundant seismic phases are clearly seen. We also obtain the seismic record section of OBS03 along the profile OBS973-3 in the Nansha Island using the same methods above. The instrument OBS06 along the profile OBS2006-2 and the instrument OBS03 along the profile OBS973-3 are the same instrument confirmed by checking their logs recorded by 2006 and 2011, respectively. It demonstrates that the processing method for abnormal OBS data is reliable and effective. Then the ray-tracing and travel-time simulation were carried out for OBS06 and OBS03 using the interactive trial-and-error 2D ray-tracing method based on the previous P-wave velocity model of OBS2006-2. The input of new travel-time picks must provide high constrains for the deep structure beneath the profile OBS2006-2. This research on abnormal data reprocessing does not only improve the reliability and resolution of the crustal structure, but also provide valuable experiences for OBS processing for other study areas for the future.
学科主题	Geochemistry & Geophysics
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15592]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Wang Qiang,Qiu Xue-Lin,Zhao Ming-Hui,et al. Analysis and processing on abnormal OBS data in the South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(3):1102-1112.
APA	Wang Qiang,Qiu Xue-Lin,Zhao Ming-Hui,Huang Hai-Bo,&Ao Wei.(2016).Analysis and processing on abnormal OBS data in the South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(3),1102-1112.
MLA	Wang Qiang,et al."Analysis and processing on abnormal OBS data in the South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.3(2016):1102-1112.