A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan
The Bouguer anomaly of Taiwan has been revised in this study based on more accurate terrain data provided by the Taiwanese Digital Terrain Model compiled by the Taiwan Forestry Bureau. Three seismic velocity models, those determined by Rau and Wu (1995), Kim et al. (2005), and Wu et al. (2007) respe...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Springer
2010-01-01
|
| Series: | Terrestrial, Atmospheric and Oceanic Sciences |
| Subjects: | |
| Online Access: |
http://tao.cgu.org.tw/images/attachments/v216p869.pdf
|
| _version_ | 1828318851654221824 |
|---|---|
| author | Horng-Yuan Yen Hsien-Hsiang Hsieh |
| author_facet | Horng-Yuan Yen Hsien-Hsiang Hsieh |
| author_sort | Horng-Yuan Yen Hsien-Hsiang Hsieh |
| collection | DOAJ |
| description | The Bouguer anomaly of Taiwan has been revised in this study based on more accurate terrain data provided by the Taiwanese Digital Terrain Model compiled by the Taiwan Forestry Bureau. Three seismic velocity models, those determined by Rau and Wu (1995), Kim et al. (2005), and Wu et al. (2007) respectively, were selected for our study. We converted their velocity models to density models using the relationship between P-wave velocity and rock density proposed by Ludwig et al. (1970) and Barton (1986), and then calculated their corresponding gravity anomalies. According to the correlation coefficient between the Bouguer anomalies calculated from the velocity models and the revised Bouguer anomalies, the Kim et al. model was more compatible with gravity data than the other two velocity models. The differences between the revised gravity anomaly and the calculated gravity anomalies trend toward positive values at elevations higher than 2000 m. This indicates that the velocities at the shallower depths beneath the mountainous area of the three models are overdetermined, i.e., higher than the real velocities. This ratiocination implies that the crustal thickness beneath the Central Range is less than 55 km which was obtained from the velocity models. |
| first_indexed | 2024-04-13T17:49:13Z |
| format | Article |
| id | doaj.art-cfcbe62513464252a59a2baf1b40c9d2 |
| institution | Directory Open Access Journal |
| issn | 1017-0839 2311-7680 |
| language | English |
| last_indexed | 2024-04-13T17:49:13Z |
| publishDate | 2010-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Terrestrial, Atmospheric and Oceanic Sciences |
| spelling | doaj.art-cfcbe62513464252a59a2baf1b40c9d22022-12-22T02:36:49ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802010-01-0121686910.3319/TAO.2010.03.03.01(T)976A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of TaiwanHorng-Yuan Yen Hsien-Hsiang HsiehThe Bouguer anomaly of Taiwan has been revised in this study based on more accurate terrain data provided by the Taiwanese Digital Terrain Model compiled by the Taiwan Forestry Bureau. Three seismic velocity models, those determined by Rau and Wu (1995), Kim et al. (2005), and Wu et al. (2007) respectively, were selected for our study. We converted their velocity models to density models using the relationship between P-wave velocity and rock density proposed by Ludwig et al. (1970) and Barton (1986), and then calculated their corresponding gravity anomalies. According to the correlation coefficient between the Bouguer anomalies calculated from the velocity models and the revised Bouguer anomalies, the Kim et al. model was more compatible with gravity data than the other two velocity models. The differences between the revised gravity anomaly and the calculated gravity anomalies trend toward positive values at elevations higher than 2000 m. This indicates that the velocities at the shallower depths beneath the mountainous area of the three models are overdetermined, i.e., higher than the real velocities. This ratiocination implies that the crustal thickness beneath the Central Range is less than 55 km which was obtained from the velocity models. http://tao.cgu.org.tw/images/attachments/v216p869.pdf Bouguer gravity anomalyMoho depthSeismic velocity structuresCrustal thickness |
| spellingShingle | Horng-Yuan Yen Hsien-Hsiang Hsieh A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan Terrestrial, Atmospheric and Oceanic Sciences Bouguer gravity anomaly Moho depth Seismic velocity structures Crustal thickness |
| title | A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan |
| title_full | A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan |
| title_fullStr | A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan |
| title_full_unstemmed | A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan |
| title_short | A Study on the Compatibility of 3-D Seismic Velocity Structures with Gravity Data of Taiwan |
| title_sort | study on the compatibility of 3 d seismic velocity structures with gravity data of taiwan |
| topic | Bouguer gravity anomaly Moho depth Seismic velocity structures Crustal thickness |
| url |
http://tao.cgu.org.tw/images/attachments/v216p869.pdf
|
| work_keys_str_mv | AT horngyuanyenhsienhsianghsieh astudyonthecompatibilityof3dseismicvelocitystructureswithgravitydataoftaiwan AT horngyuanyenhsienhsianghsieh studyonthecompatibilityof3dseismicvelocitystructureswithgravitydataoftaiwan |