Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination
In order to understand the feature of rock stress change at different depths above, within, and beneath the Chelungpu fault after the Chi-Chi earthquake, we employed a core-based stress measurement method, anelastic strain recovery (ASR) technique to determine both the orientations and magnitudes of...
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| Format: | Article |
| Language: | English |
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Springer
2007-01-01
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| Series: | Terrestrial, Atmospheric and Oceanic Sciences |
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| Online Access: |
http://tao.cgu.org.tw/pdf/v182p379.pdf
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| _version_ | 1818187021915521024 |
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| author | Weiren Lin En-Chao Yeh1 Hisao Ito Tetsuro Hirono Wonn Soh Chien-Ying Wang Kuo-Fong Ma Jih-Hao Hung and Sheng-Rong Song |
| author_facet | Weiren Lin En-Chao Yeh1 Hisao Ito Tetsuro Hirono Wonn Soh Chien-Ying Wang Kuo-Fong Ma Jih-Hao Hung and Sheng-Rong Song |
| author_sort | Weiren Lin En-Chao Yeh1 |
| collection | DOAJ |
| description | In order to understand the feature of rock stress change at different depths above, within, and beneath the Chelungpu fault after the Chi-Chi earthquake, we employed a core-based stress measurement method, anelastic strain recovery (ASR) technique to determine both the orientations and magnitudes of present three-dimensional principal rock stresses using drill core samples retrieved from Taiwan Chelungpu-fault Drilling Project (TCDP) main Hole-A. The core samples used were taken from three depths; and their lithology were sandstone at depths of 592 and 1755 m and siltstone at 1112 m. The anelastic strains of the specimens in nine directions, including six independent directions, were measured after its in-situ stress was released. Acquired anelastic strains were of high quality and reached several hundred microstrains, which is sufficiently high for the accuracy of the measurement system used. Thus, the strain data could be used for three dimensional analysis resulting in the determination of orientations and the estimation of magnitudes of the principal in-situ stresses. Preliminary stress measurement results showed that the orientations of principal stresses changed between the shallower depth above the fault and the deeper depth beneath it, that is, the present stress distribution in the TCDP hole might be influenced by the Chelungpu fault rupture. At the same time, anelastic strain recovery measurement is well suited for the task of directly determining the orientations of principal in-situ stresses and to estimate the magnitude of stresses at large/great depth. |
| first_indexed | 2024-12-11T23:04:25Z |
| format | Article |
| id | doaj.art-3e30638d574940e2976577f2d5eb184d |
| institution | Directory Open Access Journal |
| issn | 1017-0839 2311-7680 |
| language | English |
| last_indexed | 2024-12-11T23:04:25Z |
| publishDate | 2007-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Terrestrial, Atmospheric and Oceanic Sciences |
| spelling | doaj.art-3e30638d574940e2976577f2d5eb184d2022-12-22T00:46:59ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802007-01-01182379595Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress DeterminationWeiren Lin En-Chao Yeh1Hisao ItoTetsuro HironoWonn SohChien-Ying WangKuo-Fong MaJih-Hao Hungand Sheng-Rong SongIn order to understand the feature of rock stress change at different depths above, within, and beneath the Chelungpu fault after the Chi-Chi earthquake, we employed a core-based stress measurement method, anelastic strain recovery (ASR) technique to determine both the orientations and magnitudes of present three-dimensional principal rock stresses using drill core samples retrieved from Taiwan Chelungpu-fault Drilling Project (TCDP) main Hole-A. The core samples used were taken from three depths; and their lithology were sandstone at depths of 592 and 1755 m and siltstone at 1112 m. The anelastic strains of the specimens in nine directions, including six independent directions, were measured after its in-situ stress was released. Acquired anelastic strains were of high quality and reached several hundred microstrains, which is sufficiently high for the accuracy of the measurement system used. Thus, the strain data could be used for three dimensional analysis resulting in the determination of orientations and the estimation of magnitudes of the principal in-situ stresses. Preliminary stress measurement results showed that the orientations of principal stresses changed between the shallower depth above the fault and the deeper depth beneath it, that is, the present stress distribution in the TCDP hole might be influenced by the Chelungpu fault rupture. At the same time, anelastic strain recovery measurement is well suited for the task of directly determining the orientations of principal in-situ stresses and to estimate the magnitude of stresses at large/great depth. http://tao.cgu.org.tw/pdf/v182p379.pdf geophysicsgeologyatmospheric sciencespace scienceoceanic sciencehydrology |
| spellingShingle | Weiren Lin En-Chao Yeh1 Hisao Ito Tetsuro Hirono Wonn Soh Chien-Ying Wang Kuo-Fong Ma Jih-Hao Hung and Sheng-Rong Song Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination Terrestrial, Atmospheric and Oceanic Sciences geophysics geology atmospheric science space science oceanic science hydrology |
| title | Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination |
| title_full | Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination |
| title_fullStr | Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination |
| title_full_unstemmed | Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination |
| title_short | Preliminary Results of Stress Measurement Using Drill Cores of TCDP Hole-A: an Application of Anelastic Strain Recovery Method to Three-Dimensional In-Situ Stress Determination |
| title_sort | preliminary results of stress measurement using drill cores of tcdp hole a an application of anelastic strain recovery method to three dimensional in situ stress determination |
| topic | geophysics geology atmospheric science space science oceanic science hydrology |
| url |
http://tao.cgu.org.tw/pdf/v182p379.pdf
|
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