Detection of a thin layer by seismic reflection with different geophones at a site in Liangzhu, Southeastern China
- 21 Downloads
Geophone properties are important factors for high-resolution seismic exploration and greatly influence the quality of data. In this study, we will address the problems of ultra-shallow seismic data acquisition and processing. The purpose of our study is to evaluate the applicability of using different seismic geophones and processing techniques to detect a thin soil layer that is approximately 20 cm in thickness at a depth of approximately 2 m in the Liangzhu archaeological site in southeastern China. We collected seismic data using two types of geophones: normal geophones with different natural frequencies inserted into the ground and towable cable geophones contacting the earth’s surface. We considered combining the frequency advantages of these two different types of geophones to broaden the effective bandwidth of the acquired data. To achieve this, we designed a partial frequency match filtering method for data processing, which helps to improve the resolution of the reflected seismic data. The stacking profile results show that match filtering is effective in detecting a thin layer compared to drilling samples and GPR data the velocity of the thin bed is 350ms while from seismic section interval velocity of the contact between clayey soils and rammed sandy soils about 600 ms.
Keywordsthin layer seismic geophones cable geophones partial frequency match filtering
The authors of this paper undertook this work with the support of the Major Program of the National Social Science Fund of China (No. 13&ZD192). Additionally, the authors gratefully acknowledge the support of the Archaeological Institute of the Zhejiang province during data acquisition and archaeological interpretation. We also thank Miss Yiru Zhou from the University of Toronto, Canada, for being a voluntary research assistant to help us acquire field data and communicate with each other in the working group.
- Conyers LB (2004) Ground-penetrating radar for archaeology. Altamira Press, Walnut Creek, California, 203ppGoogle Scholar
- Leucci G, Greco F (2012) 3D ERT Survey to Reconstruct Archaeological feature in the “Spirit Santo ” Church Ruins at the Site of Occhiola` (Sicily, Italy). J Arch Sci 1(1):1–6Google Scholar
- Shen HL, Tian G, Shi ZJ, Zhang XT, Cong ZG, Yan LZ (2012) Application of piezoelectric matched filtering technique in Tabamiao region. J Zhejiang Univ (Eng Sci) (in Chinese) 46(3):560–567Google Scholar
- Shi, X., 1938, Liangzhu - Preliminary report on pottery cultural site: Education of Zhejiang Province Press (in Chinese).Google Scholar
- Shi ZJ, Tian G, Dong SX, He HY, Wang ZJ (2005) Match filtering of geophone coupling for high frequencies of seismic data in desert area. Geophys Prospect Petrol (in Chinese) 44(3):261–263Google Scholar
- Zhao Y (2001) Excavation of the Mojiaoshan Site at Yuhang in 1992 and 1993. Cultural Relics 12:4–19 (in Chinese)Google Scholar