[S2-02]Occurrence and mineralogy of smectite in petit-spot basalts from the Northwest Pacific [Presentation award entry]
*Taro KIDO1, Norikatsu AKIZAWA2, Yohey SUZUKI1(1. Univ. Tokyo, Sci., 2. Univ. Tokyo, AORI)
Keywords:
mantle xenolith,low-temperature alteration,montmorillonite,clay minerals
The clay fraction in petit-spots basalts was characterized using X-ray diffraction (XRD), micro-infrared spectroscopy (micro FT-IR), and scanning electron microscopy attached to an energy-dispersive X-ray spectrometer (SEM-EDS). These results revealed the formation of montmorillonite, an Al-rich smectite, in the petit-spot basalts.
