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|Title: ||花東縱谷斷層之地電研究;An Electric Resistivity Study of the Faults in the Taitung Longitudinal Valley, Eastern Taiwan.|
|Issue Date: ||2015-09-23 11:30:59 (UTC+8)|
(2)嶺頂斷層之位置在月眉地區之花蓮溪溪床中，兩側之淺部地層為沖積層，斷層東側深部地層之電阻率大於 150 Ω-m為都鑾山層，西側深部地層之電阻率小於20 Ω-m為泥岩層。
;In order to study the geological structures and activities of the faults in the Taitung Longitudinal Valley, we conducted an electric resistivity surveys consisting of twenty-five resistivity image profilings and an electromagnetic prospecting of twenty-two soundings to investigate the electric resistivities and attitude of layers and the subsurface geological structures of the eight faults. The results show as followings：
(1)The Milun Fault has an wide fault zone located on the Meilun River bed. The fracture zone is over 640 meters wide and seawater may exist deep within the fracture zone.
(2)The Lingding Fault passes through Hualien River bed in the Yuemei area. The shallow strata on both sides of the fault are alluvium. The deep part in the eastern side of the fault is the Tuluanshan Formation with a resistivity higher than 150 Ω-m. The deep part in the western side is a mudstone with a resistivity lower than 20 Ω-m.
(3)The Yuemei Fault has two fracture zones near the Yuemei village. One is the main fracture zone which is near the road of Tai 193 and the other is located around 600 meters east of Tai 193. The shallow strata on both sides of the fault are similar.
(4)The Rueyshui Fault dips southeastwards with a high angle at Guogailiang profile. The hanging wall of the fault has been uplifted 110 meters. The Wuhe Conglomerate extends eastwards to the eastern side of the fault.
(5)The location of the Yuli Fault is clearly presented in the Kecheng, Changliang and Luntian-Xiuluan area. The fault zone dips southeastwards. The slate of the Central Range exists in the deeper part of the footwall with a resistivity 150-400 Ω-m in the Yuli area and 500-800 Ω-m in the Fuli area. The hanging wall consists of alluvium which has a resistivity 400-1000 Ω-m in the Yuli area and rift valley deposits which has a resistivity 100-400 Ω-m in Fuli area. The Yuli Fault exists southwards in the Kecheng and Changliang areas and extends to Luntian-Xiuluan areas and ends before Chihshang area.
(6)The main fracture zone of the Chimei Fault which passes through Tailin 3 profile developed in the Lichi Formation and dips southeastwards. The branch fault which passes through Tailin 2 profile developed in the gravel bed and dips southeastwards .
(7)The Chihshang Fault dips southeastwards in the Dongning, Jiuan River, Wanan and Ruilong areas. The hanging wall is the Lichi Formation which has a resistivity lower than 10 Ω-m and the footwall is the rift valley deposits with a resistivity 100-1000 Ω-m.
(8)The Luye Fault dips eastwards in the Longtian and Tianliao areas. The hanging wall is the Beinanshan Conglomerate with a resistivity 300-1500 Ω-m and the footwall is the slate of the Central Range which has a resistivity 100-1000 Ω-m. The Luyeh Fault passes through the Tianliao area southwards.
(9)The fracture zone of the Beinanshan Fault is about 240 meters wide near the ground surface and dips southeastwards in the Beinan area. The hanging wall is the gravel bed of rift valley alluvium which has a resistivity 100-300 Ω-m. The shallow part of the footwall is the rift valley alluvium. The deep part of the footwall is Beinanshan Conglomerate which has a resistivity exceeds 1000 Ω-m. The Beinanshan fault passes southwards through the Beinan profile.
|Appears in Collections:||[地球物理研究所] 博碩士論文|
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