NDLI: Iron speciation in fault gouge from the Ushikubi fault zone central Japan

Content Provider	Springer Nature Link
Author	Zheng, Guodong Fu, Bihong Takahashi, Yoshio Miyahara, Masaaki Ku, Akihito Matsuo, Mutoyuki Miyashita, Yukari
Copyright Year	2008
Abstract	Chemical species of iron and sulfur were measured using 57Fe Mössbauer spectroscopy and X-ray near edge structure, respectively, for the fault gouge samples collected from two sites along the ENE-WSW trending Ushikubi fault zone in central Japan. These gouge samples have distinguishable variations in their physical properties such as surface color and structure and these features are also reflected by the chemical speciation of iron and sulfur. Newly formed minerals, including calcite, dolomite, siderite, iron sulfide and pyrite, have close relation to the colors of fault gouge and respective to the geochemical environment within the fault zone. In addition, the variations in iron and sulfur species may have significance to evaluate the redox conditions in the fractures and furthermore to estimate the history and activity of the faults. Generally there is observacious enrichment of reducing species of iron and sulfur as well as chlorite in the relatively younger fracture, indicating favorable connection pathway with deep position and the fault zone is active. On the other hand, the stable fracture with a longer history is relatively enriched in ferric iron species and almost no sulfur in the gouge. These results from iron and sulfur speciation have a good agreement with evidence indicated by 14C dating from this fault zone.
Starting Page	39
Ending Page	52
Page Count	14
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	186
Issue Number	1-3
e-ISSN	15729540
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-10-18
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Fault gouge Redox condition Iron and sulfur speciation Ushikubi fault Japan Surfaces and Interfaces, Thin Films Condensed Matter Atoms, Molecules, Clusters and Plasmas Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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