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Title: |
Identifying Potential Geothermal Area Beneath Thick Alluvium Sediments of Ilan Plain, Taiwan by Clay Mineral Assemblages and Petrography |
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Authors: |
Chia-Mei LIU, Yu-Kai HU, Ching-Huei KUO |
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Key Words: |
low-grade metamorphic rock, montmorillonite, geothermal area, Ilan Plain, Taiwan |
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Conference: |
Stanford Geothermal Workshop |
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Year: |
2019 |
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Session: |
Geology |
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Language: |
English |
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Paper Number: |
Liu4 |
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File Size: |
653 KB |
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View File: |
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The study area, Ilan Plain of Taiwan, is covered by Holocene alluvium sediments, ranging from 100 to 1200 meters. This study collected samples from four boreholes, the SanXin-BH01 (602m), JeiYuan-BH01 (1438m), HTL01 (2200m) and HTL02 (2800m), under the project of Taiwan National Energy Program-Phase II. JeiYuan-BH01, HTL01 and HTL02, mainly consist of slate, meta-sandstone, and meta-sandstone with cleavages, while SanXin-BH01 that only consists of slate. Illite, kaolinite, and chlorite are found in all samples c. The montmorillonite, however, exists in SanXin-BH01, JeiYuan-BH01, and HTL02 except HTL01. According to the results of previous studies, the montmorillonite may serve as an indication of geothermal potential area particularly in the low-grade metamorphic rock. With it we have identify the existence of geothermal potential in the area of SanXin-BH01, JeiYuan-BH01, and HTL02.
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