Spatial and temporal evolution of basalts and magnesian andesites (“bajaites”) from Baja California, Mexico: the role of slab melts

Late Triassic high-Mg andesite/dacite suites from northern Hohxil, North Tibet: Geochronology, geochemical characteristics, petrogenetic processes and tectonic implications

“…5c). The andesite samples exhibit high wt.%), Mg # (64-72), and Cr (272-531 ppm) and Ni (66.7-636 ppm) contents, which are similar to typical Cenozoic high-Mg andesites in arc settings, e.g., "adakitic" and "Piip" high-Mg andesites in the Aleutian islands (Alaska) and the Kamchatka Strait to the west of the Aleutian islands (e.g., Yogodzinski et al, 1994Yogodzinski et al, , 1995Yogodzinski et al, , 2001Yogodzinski and Kelemen, 1998), bajaites in Baja California (Mexico) (Calmus et al, 2003;Saunders et al, 1987), sanukitoids in the Setouchi Volcanic Belt (SW Japan) (Shimoda et al, 1998;Tatsumi, 2001;Tatsumi and Ishizaka, 1981) and boninites of the Bonin Islands (Japan) (e.g., Taylor et al, 1994;Umino, 1986) (Fig. 6a-e).…”

“…The data for Bonin Island boninites are from Taylor et al (1994) Umino (1986), and references therein. The data for bajaites in the Baja area, California, Mexico are from Calmus et al (2003) and Saunders et al (1987). The data for Adakitic high-Mg andesites of Adak Island (Aleutian islands) and the Kamchatka Strait to the west of Aleutian islands are from Yogodzinski et al (1995Yogodzinski et al ( , 1998Yogodzinski et al ( , 2001, and references therein; the data for Piip-type high-Mg andesites of the Piip volcano (Aleutian islands) are from Yogodzinski et al (1994).…”

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

“…3c). Magnesian andesites associated with subducted oceanic crust-derived adakites are generally considered to have been the product of hybridization of adakitic melt with mantle peridotites (Polat and Kerrich, 2002;Calmus et al, 2003;Escuder et al, 2007;Wang et al, 2008a;Manikyamba et al, 2009). In addition, the diorites samples exhibit some obvious variations in LREE, Sr, V, Cr and Ni contents.…”

Middle Jurassic MORB-type gabbro, high-Mg diorite, calc-alkaline diorite and granodiorite in the Ando area, central Tibet: Evidence for a slab roll-back of the Bangong-Nujiang Ocean

“…In addition, the Ando calc-alkaline diorites have higher ε Nd (t) values , 1998). Sanukitoid data of Setouchi volcanic belt are from Tatsumi and Hanyu (2003) and magnesian andesite data of Baja California are from Calmus et al (2003). ( than the high-Mg diorites, further excluding fractional crystallization from the high-Mg diorites magma.…”