| Summary: | 碩士 === 國立中央大學 === 地球物理研究所 === 90 === A geoelectric study of the northern segment of the Chelungpu fault
Yeng-Ping Wang
Abstract
The resistivity image profiling is used to investigate the features of the electric resistivity structures of northern segment of the Chelungpu fault, from Feng-Yuan to Nanton. Several conclusions can be drawn as follows：
(1)In Feng-Yuan and Tai-Ping , the resistivity of both side the fault zone is less then 30Ω．m. Both the foot wall and hanging wall are Chinshui Shale or cholan formation. The result is fitting with the Feng-Yuan well. The fault dips eastward at an angle of about 60-80 degrees.
(2)In the southern of Ji-Feng, the resistivity of hanging wall is 1-50Ω．m, and the resistivity of foot wall is 50-2000Ω．m. It indicates that hanging wall is Chinshui Shale or cholan formation and foot wall is toukeshan formation.
(3)In Nanton, the resistivity of hanging wall is 5-30Ω．m, and the resistivity of foot wall is 100-300Ω．m. It indicates that hanging wall is Chinshui Shale or cholan formation and foot wall is toukeshan formation. The result is fitting with the Nanton well.
(4)In profile E-E’, F-F’ and G-G’ of Ben-Ji-Hu, the fault dips southward at an angle of about 45 degrees. By the electric resistivity structure, that hanging wall is Chinshui Shale or cholan formation and foot wall is toukeshan formation.
(5)In Ji-Feng, the resistivity of hanging wall is 3-30Ω．m, and the the resistivity of foot wall is 100-300Ω．m. It indicates that hanging wall is Chinshui Shale or cholan formation and foot wall is toukeshan formation. The fault dips eastward at an angle of about 60 degrees.
(6)In Quang-Fu junior high school, the resistivity of hanging wall is 6-20Ω．m, and the resistivity of foot wall is 100-2000 Ω．m. It indicates that hanging wall is Chinshui Shale or cholan formation and foot wall is toukeshan formation. The fault dips eastward at an angle of about 80 degrees.
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