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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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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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.
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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 |
work_keys_str_mv |
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