Modeling Shallow Structures beneath Ilan Plain by using Gravity Data

碩士 === 國立中央大學 === 地球科學學系 === 105 === The Ilan geothermal field is the largest known productive geothermal area in Taiwan, and the distribution of geothermal reservoirs are related to the pattern of shallow structure. Using gravity analyses are well suited to investigate the reliable subsurface densi...

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Main Authors: Pei-Cheng Wu, 吳沛澄
Other Authors: Horng-Yuan Yen
Format: Others
Language:zh-TW
Published: 2017
Online Access:http://ndltd.ncl.edu.tw/handle/bv76y6
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spelling ndltd-TW-105NCU051340062019-05-15T23:39:52Z http://ndltd.ncl.edu.tw/handle/bv76y6 Modeling Shallow Structures beneath Ilan Plain by using Gravity Data 利用重力資料探討宜蘭平原淺部地下構造 Pei-Cheng Wu 吳沛澄 碩士 國立中央大學 地球科學學系 105 The Ilan geothermal field is the largest known productive geothermal area in Taiwan, and the distribution of geothermal reservoirs are related to the pattern of shallow structure. Using gravity analyses are well suited to investigate the reliable subsurface density structure. First, we combine with land and marine gravity data to obtain gravity anomaly. We use the filter based on the relationship between gravity anomalies and the depth of source to analysis gravity data. Second, we obtained two-dimensional density structure referred to north-south seismic profile. In our study, residual gravity anomalies show that most of the faults in the north part of the Ilan Plain are reverse fault. The Choshui Fault is the boundary fault between the Hsuehshan Range and the Central Range. The pattern of SanShin fault is not clear, but the negative gravity anomaly was found in south part of the Ilan Plain might relate to the activity structure. Furthermore, there is a positive gravity anomaly beneath the Lanyang River, comparing with the magnetic result, we propose intrusive igneous rocks exist beneath the Ilan Plain. Horng-Yuan Yen 顏宏元 2017 學位論文 ; thesis 81 zh-TW
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description 碩士 === 國立中央大學 === 地球科學學系 === 105 === The Ilan geothermal field is the largest known productive geothermal area in Taiwan, and the distribution of geothermal reservoirs are related to the pattern of shallow structure. Using gravity analyses are well suited to investigate the reliable subsurface density structure. First, we combine with land and marine gravity data to obtain gravity anomaly. We use the filter based on the relationship between gravity anomalies and the depth of source to analysis gravity data. Second, we obtained two-dimensional density structure referred to north-south seismic profile. In our study, residual gravity anomalies show that most of the faults in the north part of the Ilan Plain are reverse fault. The Choshui Fault is the boundary fault between the Hsuehshan Range and the Central Range. The pattern of SanShin fault is not clear, but the negative gravity anomaly was found in south part of the Ilan Plain might relate to the activity structure. Furthermore, there is a positive gravity anomaly beneath the Lanyang River, comparing with the magnetic result, we propose intrusive igneous rocks exist beneath the Ilan Plain.
author2 Horng-Yuan Yen
author_facet Horng-Yuan Yen
Pei-Cheng Wu
吳沛澄
author Pei-Cheng Wu
吳沛澄
spellingShingle Pei-Cheng Wu
吳沛澄
Modeling Shallow Structures beneath Ilan Plain by using Gravity Data
author_sort Pei-Cheng Wu
title Modeling Shallow Structures beneath Ilan Plain by using Gravity Data
title_short Modeling Shallow Structures beneath Ilan Plain by using Gravity Data
title_full Modeling Shallow Structures beneath Ilan Plain by using Gravity Data
title_fullStr Modeling Shallow Structures beneath Ilan Plain by using Gravity Data
title_full_unstemmed Modeling Shallow Structures beneath Ilan Plain by using Gravity Data
title_sort modeling shallow structures beneath ilan plain by using gravity data
publishDate 2017
url http://ndltd.ncl.edu.tw/handle/bv76y6
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