Petrophysical characteristics of peridotites preserved in a serpentinite body of Setogawa belt and its occurrence in Circum-Izu Massive Serpentine Belt

Katsuyoshi Michibayashi; Saki Tokunaga

Presentation information

[JJ] Oral

S (Solid Earth Sciences) » S-CG Complex & General

[S-CG60] Petrology, Mineralogy and Resource Geology

Wed. May 23, 2018 10:45 AM - 12:15 PM A04 (Tokyo Bay Makuhari Hall)

convener:Koichi Momma(National Museum of Nature and Science), Tatsuo Nozaki(Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology), Satoshi SAITO(愛媛大学大学院理工学研究科, 共同), Nobutaka Tsuchiya(Department of Geology, Faculty of Education, Iwate University), Chairperson:Saito Satoshi

11:00 AM - 11:15 AM

[SCG60-08] Petrophysical characteristics of peridotites preserved in a serpentinite body of Setogawa belt and its occurrence in Circum-Izu Massive Serpentine Belt

*Katsuyoshi Michibayashi^1,2, Saki Tokunaga¹ (1.Institute of Geosciences, Shizuoka University, 2.Department of Earth and Planetary Sciences, Nagoya University)

Keywords:Serpentinite, Olivine, Spinel, Crystal-fabric

We present petrophysical characteristics of serpentinized peridotites obtained from Setogawa belt in the Oi-gawa valley. The peridotites are dominantly harzburgites with minor dunites. Olivine grain sizes within the peridotites are ranged from coarser grains (>3mm) to medium grains (~1mm) and show undulose extinctions as well as kink bands. The chemical compositions of both olivine and spinel are in the range of the olivine-spinel mantle array of Arai (1994).