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相關文獻
- Investigating the TCDP Drill Site Using Deep and Shallow Reflection Seismics
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頁籤選單縮合
題 名 | Investigating the TCDP Drill Site Using Deep and Shallow Reflection Seismics=以反射震測法調查TCDP井址地下構造 |
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作 者 | 王乾盈; 李千里; 吳明賢; 葛滿龍; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷 期 | 18:2 2007.06[民96.06] |
頁 次 | 頁129-141 |
專 輯 | 臺灣車籠埔斷層深鑽計畫:井址特性與現地量測專刊 |
分類號 | 353.4 |
關鍵詞 | 反射震測法; 地下構造; 車籠埔斷層; 集集地震; Chi-Chi earthquake; Chelungpu fault; Reflection seismics; TCDP; |
語 文 | 英文(English) |
英文摘要 | The 1999 Chi-Chi earthquake (M = 7.6), Taiwan, reactivated the 105 km long, NS trending Chelungpu fault causing extraordinary surface ruptures. The distribution of the ruptures was quite heterogeneous with the largest displacement (up to 12 m) occurring across the Tachia River, 50 km north of the epicenter. In this study, several different scaled seismic lines are constrained and used to predict the major regional fault geometry. The 3D northern lateral ramp of the Chelungpu fault is clearly found, which provides a structural framework to explain the en echelon surface ruptures around the Tachia River. These data were also applied to identify the strata connected with the site of a 2 km hole (the Taiwan Chelungpu-fault Drilling Project, TCDP). Adequate site conditions are predicted before drilling and rechecked after drilling. A °‧TT-boundary°P is proposed as a structural control of the faulti in the area, which shapes the strata to dip 30 east and 20 south at the drill site. A depth of 1100 m for the Chi-Chi earthquake fault zone was predicted and confirmed. This is a good example, combining different scaled seismic methods to study detailed underground structures, which has the drilling purpose. |
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