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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 龔源成 | |
| dc.contributor.author | Chih-Chieh Chien | en |
| dc.contributor.author | 簡志傑 | zh_TW |
| dc.date.accessioned | 2021-06-17T01:17:46Z | - |
| dc.date.available | 2017-08-25 | |
| dc.date.copyright | 2017-08-25 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-08-14 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/67030 | - |
| dc.description.abstract | 本研究利用周遭噪訊層析成像，自噪訊中萃取短週期(3-7秒)雷利波計算經驗格林函數，檢視臺灣本島淺部地殼(<10公里)剪力波速度構造及震波非均向性。震波資料來自2006-2007年間六個不同觀測網，為了增加波線覆蓋程度，首次計算寬頻與短週期資料之間的交互相關函數，並透過多重尺度小波逆推，建構臺灣淺部地殼三維均向與方位非均向性剪力波速度模型。
均向速度方面，整體淺部地殼的剪力波速度側向變化強烈，且速度分布與地表地質十分吻合，高速異常帶主要分布在中央山脈，速度約3.0-3.5 km/s，低速異常帶分布在桃園臺地、彰化平原、嘉南平原與花東縱谷，速度約1.5-2.3 km/s，其中位在嘉南平原的低速異常帶可延續至深度5-7公里。非均向性部分，地殼中的非均向性大致可分為(1)主要反映岩層中裂隙，導致快軸方向平行最大主應力型態與(2)受面理差異排列主導的構造相關型態。研究成果顯示，臺灣淺部地殼的剪力波方位非均向性快軸方向主要沿著造山帶走向，與近地表非均向性量測成果相比，我們認為快軸方向平行最大主應力的非均向性主要侷限在深度1公里以內。 | zh_TW |
| dc.description.abstract | In this study, we aim to better constrain the shallow seismic structure (<10 km) of Taiwan by utilizing the short period (3-7 seconds) empirical Green’s functions (EGFs) of Rayleigh waves extracted from ambient seismic noise. To improve the data coverage, continuous data recorded by 6 seismic networks during the time period from 2006 to 2007 are used to derive the EGFs between all the cross-network station pairs. With this unprecedented data set, we are able to build up high resolution 3-D Vs and Vs azimuthal anisotropy models for the shallow crust of Taiwan, using a wavelet-based multi-scale inversion technique.
Robust features both in Vs and Vs anisotropy variations of the shallow crust are obtained in the resulting 3-D models. The strong Vs lateral variations are closely related to the surface geology, and the patterns of Vs anisotropy are mostly dominated by structure-related anisotropy, with fast polarization direction generally parallel to the mountain ranges. With the new results, and our recent studies with broad-band EGFs and borehole noise interferometry, we conclude that the stress-aligned anisotropy is likely confined in the near-surface depths (< ~1 km). | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T01:17:46Z (GMT). No. of bitstreams: 1 ntu-106-R04224201-1.pdf: 11878443 bytes, checksum: 9861be7b55c1c8ddb70094e05d15b027 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 中文摘要 III
Abstract IV 第1章、 緒論 1 1.1. 引言 1 1.2. 周遭噪訊層析成像 1 1.3. 震波非均向性 2 第2章、 地體架構與區域地質 12 第3章、 資料簡介 16 第4章、 理論背景與資料處理 18 4.1. 理論背景 18 4.2. 資料前置處理 20 4.3. CCF計算與疊加 20 4.4. 表面波頻散分析 21 4.4.1. 群速度量測 21 4.4.2. 相速度量測 22 4.4.3. 資料篩選 23 第5章、 多重尺度小波逆推 28 5.1. 多重尺度小波逆推 28 5.2. 方位非均向性 29 第6章、 成果與討論 32 6.1. 二維雷利波速度構造 32 6.1.1. 速度構造成果 32 6.1.2. 模型測試 32 6.2. 三維剪力波速度構造 33 6.2.1. 速度構造成果 33 6.2.2. 模型測試與比較 34 第7章、 結論 50 參考文獻 51 附錄、觀測網資訊 56 中央氣象局短週期地震觀測網 56 新竹微震觀測網 58 陽明山微震觀測網 58 中央氣象局寬頻地震觀測網 59 臺灣地體動力整合研究計畫 60 臺灣寬頻地震觀測網 61 | |
| dc.language.iso | zh-TW | |
| dc.subject | 周遭噪訊層析成像 | zh_TW |
| dc.subject | 剪力波方位非均向性 | zh_TW |
| dc.subject | 臺灣淺部地殼地震地體構造 | zh_TW |
| dc.subject | ambient seismic noise tomography | en |
| dc.subject | Vs azimuthal anisotropy | en |
| dc.subject | shallow seismic structure of Taiwan | en |
| dc.title | 利用周遭噪訊層析成像探討臺灣淺部地殼構造 | zh_TW |
| dc.title | Shallow Seismic Structure of Taiwan Constrained by Ambient Seismic Noises | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 喬凌雲,郭本垣,梁文宗,曾泰琳 | |
| dc.subject.keyword | 周遭噪訊層析成像,剪力波方位非均向性,臺灣淺部地殼地震地體構造, | zh_TW |
| dc.subject.keyword | ambient seismic noise tomography,Vs azimuthal anisotropy,shallow seismic structure of Taiwan, | en |
| dc.relation.page | 61 | |
| dc.identifier.doi | 10.6342/NTU201702613 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-08-14 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 地質科學研究所 | zh_TW |
| 顯示於系所單位： | 地質科學系 | |
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