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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 許鶴瀚 | zh_TW |
| dc.contributor.advisor | Ho-Han Hsu | en |
| dc.contributor.author | 陳維蓁 | zh_TW |
| dc.contributor.author | Wei-Chen Chen | en |
| dc.date.accessioned | 2025-08-20T16:39:13Z | - |
| dc.date.available | 2025-08-21 | - |
| dc.date.copyright | 2025-08-20 | - |
| dc.date.issued | 2025 | - |
| dc.date.submitted | 2025-08-13 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/99013 | - |
| dc.description.abstract | 臺灣海峽中部曾被報導好發流體移棲與土壤液化，但過去之研究較少針對沉積物如何受到流體影響而產生流體移棲及沉積物變形特徵，若能進一步辨識與探討中臺灣海峽的軟質沉積物變形，將有助於更好地瞭解沉積物的變形過程、發育環境、流體移棲機制及對周遭地層可能產生之影響。本研究利用臺灣海峽收集之底質剖面與反射震測資料，辨識不同尺度下的軟質沉積物變形。並透過湧浪效應修正與複反射消除等進階的底質與震測剖面資料處理技術，有效提高本研究所使用的高解析震測成像成果，更提升解釋工作效率與對沉積物特徵辨識之可信度。另藉由穿透深度較深之反射震測剖面，觀察較深部地層有無可能導致變形發生的地質因子。本研究藉由不同的震測相特徵於底質剖面中辨識出荷重型、流體型F1和流體型F2三種軟質沉積物變形型態。流體型F1與荷重型僅於底質剖面資料於淺部地層中辨識，而流體型F2則可於底質剖面及反射震測資料中同時出現，且從震測剖面中可進一步於地層中觀察到大量裂隙出現，故判斷流體型F2可由深部發育並貫穿上部地層，為大尺度之軟質沉積物變形。透過軟質沉積物變形之形貌特徵與分布，結合過往研究之觸發指標，本研究提出中臺灣海峽軟質沉積物變形應有不同觸發機制，推測為地震、快速沉積或波浪等因素。結合軟質沉積物變形尺度與震測相特徵分析，也推論出三種軟質沉積物變形與沉積物液化過程：(1)荷重型為淺層之受壓地層受觸發導致變形，孔隙水與沉積物向上逃逸至海床釋放壓力，沉積物重新排列形成下凹碗狀之軟質沉積物變形；(2)流體型F1為淺層超壓地層受觸發而造成變形，使孔隙水與沉積物逃逸至上覆沉積層，變形結束後於沉積層內部形成不規則狀之軟質沉積物變形；(3)流體型F2為地層深部受壓地層被觸發變形，而孔隙水壓貫穿上覆地層以釋放壓力，最終於地層內形成垂直管狀之軟質沉積物變形。 | zh_TW |
| dc.description.abstract | The central Taiwan Strait is a region prone to fluid migration and soil liquefaction, few studies have investigated these processes from the perspective of soft-sediment deformation structures (SSDS) yet, leaving their formation mechanisms unclear. This study identifies and interprets SSDS using sub-bottom profiler (SBP) and multi-channel seismic (MCS) data. MCS profiles have also been used to examine deeper geological factors potentially responsible for triggering deformation. Advanced processing techniques, including swell filter and demultiple, were applied to enhance data resolution and improve interpretation reliability. These methods significantly enhanced the data quality, boosting both interpretation efficiency and the reliability of identifying SSDS. Based on seismic facies and morphology, three SSDS types have been identified: Load, F1 (irregular-shaped), and F2 (vertical pipe-like) types. Load and F1 types were observed only in SBP profiles, while F2 type appeare in both SBP and MCS data. Significantly, MCS data revealed abundant faults and fractures within the strata, suggesting that the F2 type deforms from depth and penetrates the overlying strata, indicative of large-scale SSDS. This study proposes that earthquakes, rapid sedimentation, and wave activity are likely triggers of SSDS in this region. Correspondingly, three liquefaction processes are inferred: (1) Load type deformations when shallow over-pressured strata release pore fluid to the seafloor, resulting in bowl-shaped features; (2) F1 type deformations when pore fluids escape into overlying strata, producing irregular shapes; and (3) F2 type deformations when deep pore fluids migrate upward, forming vertical pipe-like structures. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2025-08-20T16:39:13Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2025-08-20T16:39:13Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員審定書 i
誌謝 ii 摘要 iii Abstract iv 目次 v 圖次 vii 表次 x 第一章 緒論 1 1.1 研究動機與目的 1 1.2 研究區域與方法 3 1.3 文章架構 3 第二章 區域地質背景與軟質沉積物變形 5 2.1中臺灣海峽地質背景 5 2.2中臺灣海峽沉積物的來源與傳輸 8 2.3軟質沉積物變形 11 2.4軟質沉積物變形之震測相 17 第三章 資料收集與處理 20 3.1資料種類與分布 20 3.2資料概況 22 3.3資料處理與分析 25 3.3.1 底質剖面資料 25 3.3.2 反射震測資料 29 3.4 震測相分析 35 第四章 研究成果 40 4.1底質剖面解釋 40 4.2反射震測剖面解釋 53 4.3底質剖面辨識成果分類 65 4.3.1流體型F1（不規則狀） 65 4.3.2流體型F2（垂直管狀） 66 4.3.3荷重型 66 4.4反射震測剖面辨識成果 74 4.5軟質沉積物變形之尺度比較 79 第五章 討論 83 5.1軟質沉積物變形之觸發機制 83 5.1.1地震觸發機制之探討 85 5.1.2其他觸發機制之探討 91 5.2軟質沉積物變形之過程 101 5.2.1荷重型之變形過程 101 5.2.2流體型F1之變形過程 104 5.2.3流體型F2之變形過程 106 第六章 結論 109 第七章 參考文獻 112 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 軟質沉積物變形 | zh_TW |
| dc.subject | 液化作用 | zh_TW |
| dc.subject | 底質剖面 | zh_TW |
| dc.subject | 反射震測 | zh_TW |
| dc.subject | 臺灣海峽 | zh_TW |
| dc.subject | soft-sediment deformation structure | en |
| dc.subject | Taiwan Strait | en |
| dc.subject | multi-channel seismic | en |
| dc.subject | sub-bottom profiler | en |
| dc.subject | liquefaction | en |
| dc.title | 中臺灣海峽軟質沉積物變形構造分析 | zh_TW |
| dc.title | Soft-sediment deformation structure analysis in the central Taiwan Strait | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 113-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 劉家瑄;陳麗雯;韓為中;張頌平 | zh_TW |
| dc.contributor.oralexamcommittee | Char-Shine Liu;Li-Wen Chen;Wei-Chung Han;Sung-Ping Chang | en |
| dc.subject.keyword | 軟質沉積物變形,液化作用,底質剖面,反射震測,臺灣海峽, | zh_TW |
| dc.subject.keyword | soft-sediment deformation structure,liquefaction,sub-bottom profiler,multi-channel seismic,Taiwan Strait, | en |
| dc.relation.page | 122 | - |
| dc.identifier.doi | 10.6342/NTU202504081 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2025-08-14 | - |
| dc.contributor.author-college | 理學院 | - |
| dc.contributor.author-dept | 海洋研究所 | - |
| dc.date.embargo-lift | 2026-12-31 | - |
| Appears in Collections: | 海洋研究所 | |
Files in This Item:
| File | Size | Format | |
|---|---|---|---|
| ntu-113-2.pdf Until 2026-12-31 | 31.65 MB | Adobe PDF |
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