Slab melting as an explanation of Quaternary volcanism and aseismicity in southwest Japan

Sr-Nd-Pb isotopic and major and trace element compositions of the Yufu-Tsurumi volcanic rocks: implications for the magma genesis of the Yufu-Tsurumi volcanoes, northeast Kyushu, Japan

“…All analysis were carried out at BGRL, IGS, Kyoto University. Normalizing factors to correct isotopic fractionation in the mass spectrometry for Sr, Nd, and Pb isotope analyses are In Figure 3a, the YTV lavas show Sr and Nd isotopic ratios that are similar to the magmas found at Daisen, southwest Japan (Kimura et al, 2005), which are described as being Quaternary adakite (e.g., Morris 1995;Kimura et al, 2005), and the Setouchi high Mg andesites (HMA) (Shimoda et al, 1998;Tatsumi and Hanyu, 2003). The magma sources of the Daisen adakites and Setouchi HMA are thought to be primarily created by the partial melting of subducting oceanic crust and sediments (Shimoda et al, 1998;Tatsumi and Hanyu, 2003;Kimura et al, 2005).…”

“…A partial melting of the Philippine Sea Plate is assumed in several other Quaternary volcanoes in southwest Japan (e.g., Morris 1995;Kimura et al, 2005). From this study, we conclude that the area where the subducting Philippine Sea Plate is partially molten can be extended to northeast Kyushu.…”

Late Neoarchean potassic high Ba–Sr granites in the Taishan granite–greenstone terrane: Petrogenesis and implications for continental crustal evolution

“…Fields of high Ba-Sr and low Ba-Sr granitoids are based on data from Fowler and Henney (1996) and Fowler et al (2001). Fields of adakite are based on data from Defant et al (1991a,b), Sajona et al (1993Sajona et al ( , 1994, Morris (1995), Stern and Kilian (1996) and Yogodzinski et al (1994Yogodzinski et al ( , 1995. Field of Closepet granite is from Moyen et al (2001Moyen et al ( , 2003.…”

Chemical compositions of the Paleogene granitoids of eastern Shimane Prefecture, Sanin District, Southwest Japan

“…Therefore no clear evidence of adakitic activities is seen in the middle Miocene time. Adakites are very well known in the Quaternary Sanbesan and Daisen volcanoes (Morris, 1995).…”