Mesoscopic structural observations of cores from the Chelungpu fault system, Taiwan Chelungpu-fault Drilling Project Hole-A, Taiwan

被引:28
|
作者
Sone, Hiroki [1 ]
Yeh, En-Chao
Nakaya, Taichi
Hung, Ji-Hao
Ma, Kuo-Fong
Wang, Chien-Ying
Song, Sheng-Rong
Shimamoto, Toshihiko
机构
[1] Stanford Univ, Dept Geophys, Stanford, CA 94305 USA
[2] Kyoto Univ, Fac Sci, Dept Geol & Mineral, Kyoto 606, Japan
[3] Japan Agcy Marine Earth Sci & Technol, Kochi Inst Core Sample Res, Kochi, Japan
[4] Kochi Univ, Dept Nat Environm Sci, Kochi 780, Japan
[5] Natl Cent Univ, Dept Earth Sci, Chungli, Taiwan
[6] Natl Cent Univ, Inst Geophys, Chungli, Taiwan
[7] Natl Taiwan Univ, Dept Geosci, Taipei 10764, Taiwan
来源
关键词
Chelungpu fault; core description; fault gouge; fault breccia;
D O I
10.3319/TAO.2007.18.2.359(TCDP)
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Structural characteristics of fault rocks distributed within major fault zones provide basic information in understanding the physical aspects of faulting. Mesoscopic structural observations of the drilled cores from Taiwan Chelungpu-fault Drilling Project Hole-A are reported in this article to describe and reveal the distribution of fault rocks within the Chelungpu Fault System. The Chelungpu Fault System in Hole-A was encountered at a depth of between 1050 - 1250 m where deformation structures increased. Three major fault zone structures were found at approximate depths of 1111, 1153, and 1221 m. The presence of wide fault rock regions were mostly concentrated in these 3 fault zones. The fault zone at 1111 m mainly consists of a nearly brecciated fracture zone and a clayey fault gouge zone of about 1.05 m in thickness. Fault rocks from the fault zone at 1153 m are characterized by the presence of sand grains in the matrix content, consisting of a 1.1-m thick fault breccia zone and a 0.35-m thick fault gouge zone. The fault zone at 1221 m consists of fault breccia and fault gouge of 1.15 m in total thickness. These are relatively harder and darker in color than the previous 2 fault zones. Each of the 3 fault zones contains a few layers of dark colored rocks of approximately 5 - 80 turn in thickness within the fault breccia and fault gouge zones. These dark colored rocks were found distinctively within the fault rocks. However, there relation to the process of faulting is not clearly understood and shall be discussed in detail with the aid of microscopic observations.
引用
收藏
页码:359 / 377
页数:19
相关论文
共 50 条
  • [1] Core description and characteristics of fault zones from Hole-A of the Taiwan Chelungpu-fault Drilling Project
    Yeh, En-Chao
    Sone, Hiroki
    Nakaya, Taichi
    Ian, Ka-Hao
    Song, Sheng-Rong
    Hung, Jih-Hao
    Lin, Weiren
    Hirono, Tetsuro
    Wang, Chien-Ying
    Ma, Kuo-Fong
    Soh, Wonn
    Kinoshita, Masataka
    [J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 2007, 18 (02): : 327 - 357
  • [2] Core-log integration studies in hole-A of Taiwan Chelungpu-fault Drilling Project
    Wu, Yun-Hao
    Yeh, En-Chao
    Dong, Jia-Jyun
    Kuo, Li-Wei
    Hsu, Jui-Yu
    Hung, Jih-Hao
    [J]. GEOPHYSICAL JOURNAL INTERNATIONAL, 2008, 174 (03) : 949 - 965
  • [3] Stress orientations of Taiwan Chelungpu-Fault Drilling Project (TCDP) hole-A as observed from geophysical logs
    Wu, Hung-Yu
    Ma, Kuo-Fong
    Zoback, Mark
    Boness, Naomi
    Ito, Hisao
    Hung, Jih-Hao
    Hickman, Stephen
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (01)
  • [4] Slip zone and energetics of a large earthquake from the Taiwan Chelungpu-fault Drilling Project
    Ma, Kuo-Fong
    Tanaka, Hidemi
    Song, Sheng-Rong
    Wang, Chien-Ying
    Hung, Jih-Hao
    Tsai, Yi-Ben
    Mori, Jim
    Song, Yen-Fang
    Yeh, Eh-Chao
    Soh, Wonn
    Sone, Hiroki
    Kuo, Li-Wei
    Wu, Hung-Yu
    [J]. NATURE, 2006, 444 (7118) : 473 - 476
  • [5] Slip zone and energetics of a large earthquake from the Taiwan Chelungpu-fault Drilling Project
    Kuo-Fong Ma
    Hidemi Tanaka
    Sheng-Rong Song
    Chien-Ying Wang
    Jih-Hao Hung
    Yi-Ben Tsai
    Jim Mori
    Yen-Fang Song
    Eh-Chao Yeh
    Wonn Soh
    Hiroki Sone
    Li-Wei Kuo
    Hung-Yu Wu
    [J]. Nature, 2006, 444 : 473 - 476
  • [6] Profiles of volumetric water content in fault zones retrieved from hole B of the Taiwan Chelungpu-fault Drilling Project (TCDP)
    Lin, Weiren
    Matsubayashi, Osamu
    Yeh, En-Chao
    Hirono, Tetsuro
    Tanikawa, Wataru
    Soh, Wonn
    Wang, Chien-Ying
    Song, Sheng-Rong
    Murayama, Masafumi
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2008, 35 (01)
  • [7] Lithostratigraphy of the Taiwan Chelungpu-fault Drilling Project-A borehole and its neighboring region, central Taiwan
    Lin, Andrew Tien-Shun
    Wang, Shun-Min
    Hung, Jih-Hao
    Wu, Ming-Shyan
    Liu, Chih-Shae
    [J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 2007, 18 (02): : 223 - 241
  • [8] Nondestructive continuous physical property measurements of core samples recovered from hole B, Taiwan Chelungpu-Fault Drilling Project
    Hirono, Tetsuro
    Yeh, En-Chao
    Lin, Weiren
    Sone, Hiroki
    Mishima, Toshiaki
    Soh, Wonn
    Hashimoto, Yoshitaka
    Matsubayashi, Osamu
    Aoike, Kan
    Ito, Hisao
    Kinoshita, Masataka
    Murayama, Masafumi
    Song, Sheng-Rong
    Ma, Kuo-Fong
    Hung, Jih-Hao
    Wang, Chien-Ying
    Tsai, Yi-Ben
    Kondo, Tomomi
    Nishimura, Masahiro
    Moriya, Soichi
    Tanaka, Tomoyuki
    Fujiki, Toru
    Maeda, Lena
    Muraki, Hiroaki
    Kuramoto, Toshikatsu
    Sugiyama, Kazuhiro
    Sugawara, Toshikatsu
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2007, 112 (B7)
  • [9] Observation and scaling of microearthquakes from the Taiwan Chelungpu-fault borehole seismometers
    Lin, Yen-Yu
    Ma, Kuo-Fong
    Oye, Volker
    [J]. GEOPHYSICAL JOURNAL INTERNATIONAL, 2012, 190 (01) : 665 - 676
  • [10] Subsurface structure, physical properties, and fault zone characteristics in the scientific drill holes of Taiwan Chelungpu-fault Drilling Project
    Hung, Jih-Hao
    Wu, Yun-Hao
    Yeh, En-Chao
    Wu, Jong-Chang
    [J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 2007, 18 (02): : 271 - 293