碩士 / 國立臺北科技大學 / 材料及資源工程系碩士班 / 92 / This study is to construct a , geothermal genesis model for Chiao-shi Area by integrating various data sources such as derived from field geology survey, geophysical exploration, chemical analysis of water samples, and well drillings. And, subsequently, evaluation on the occurrences and genesis of hot springs is deduced to estimate the reserves of the resources for the purpose of sustainable development.
The study area of Chaio-Shi and its vicinity is a colluvium-alluvium plain located in the northen-east end of Hsueh-Shan (Mountain) Range. The bedrock is Szeleng Sandstone Formation, which is overlain by a younger underlain by the formation namely Kankou Formation. In terms of geological structure, this area is a geological fenster, which is dissected by faults in its surroundings as revealed by gravity prospecting. A fault scarp lineament with a 50 m throw is observed between the hillside and the plain. The Szeleng Sandstone is dipping to the plain in eastern side. It is observed by drilling cores that the area enclosed by Jon-Siao Road, De-Yang Road, and the hillside is the major hot spring area, where one can find hot spring fluid saturated within 100 m in depth.
Geophysical prospecting indicates that there are at least three major fractures acting as the paths for hot spring to ascend from deep ground. The central area is enclosed by Jon-Siao Road, Zen-Ai Road, and the hillside. The cross-section of electrical resistance between these two roads shows that low resistance patterns are limited in a narrow belt extent under 250 m in depth. In contrast, the low resistance patterns become larger horizontal oval shapes above 100 m in depth. This phenomenon indicates that hot water ascends through fractures and spreads in the cross-bedded unconsolidated materials to form a mushroom model. Drilling well manifested the fact that the water is hot on top in the mushroom border and becomes cold beneath it. On the other hand, the drilling well such as Well #NW1 with a depth of 131 m in the center of the mushroom does not present such a phenomenon. The production rate of the 4” Well is 3,000 tons per day and the temperature on top of the Well is 60 degrees Centigrade. The total number of wells was estimated as much as 2,500 and the consumption is 16,000 tons per day. In average, the production rate of each well is only 6.4 tons per day. For sustainable development of hot spring resources, it is recommended that a public well system with 7-8 wells like Well #NW1 should be implemented, and , thus, to conform the Hot Spring Law.
| Identifer | oai:union.ndltd.org:TW/092TIT00681019 |
| Date | January 2004 |
| Creators | Chang,Pao-tang, 張寶堂 |
| Contributors | Wang,Wen-sheng, 王文生 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 0 |
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