Deep Electrical Structure Model of Taiwan

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Project title

Code/計畫編號

NSC102-2116-M019-004-MY2

Translated Name/計畫中文名

臺灣深部電性構造模型

Project Coordinator/計畫主持人

Chih-Wen Chiang

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Earth Sciences

Website

https://www.grb.gov.tw/search/planDetail?id=3174799

Year

2013

Start date/計畫起

01-10-2013

Expected Completion/計畫迄

01-09-2014

Bugetid/研究經費

1101千元

ResearchField/研究領域

地球科學

The Chingshui geothermal area southwest of the Ilan plain is identified as a western extension of the Okinawa Trough in the northern Taiwan subduction system. Numerous geophysical, geological and geochemical investigations have been conducted since the 1970s by the Industrial Technology Research Institute, the Chinese Petroleum Corporation of Taiwan and the National Science Council of Taiwan. These studies indicated that the Chingshui stream is one of the largest geothermal areas for electricity generation in Taiwan. However, the power generation efficiency has not met initial expectations. Magnetotelluric (MT) data analyses show that the Chingshui geothermal region is a geologically complex area. A full three-dimensional (3D) inversion was therefore applied to reprocess the MT data and provide the detailed electrical structure beneath the Chingshui geothermal region. The 3D geoelectrical model displays an improved image that clearly delineates the Chingshui geothermal system geometry. Two conductive anomalies are imaged that possibly indicate high potential areas for geothermal energy in the Chingshui geothermal system. One of the potential areas is located in the eastern part of the Chingshui Fault at shallow depths. A significant conductive anomaly is associated with high heat flow and fluid content situations southwest of the geothermal manifest area at depth. A higher interconnected fluid indicates that this area contains the highest potential for geothermal energy in the Chingshui geothermal system.

Keyword(s)

大地電磁學
深部電性構造
三維逆推
殼內流體
Magnetotellurics
Deep electrical structure
3D inversion
Crustal fluid

DSpace CRIS

Deep Electrical Structure Model of Taiwan

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