Figure 1
From: Genesis of ultra-high-Ni olivine in high-Mg andesite lava triggered by seamount subduction
Plate tectonic setting and major geological structures of the Kamchatka Peninsula and detailed map of the studied area (EC). (a) The inset shows the plate tectonic setting and location of the Emperor Seamount Chain that connects to the Hawaiian hotspot. The North American Plate (NAP), Pacific Plate (PAP), and Okhotsk Plate (OHP) form a triple junction in this region. Plate configuration is after ref. 73. White arrows indicate the motion vector of the Pacific Plate. Red triangles indicate locations of active volcanoes. Thin lines with numbers show depth of subducted Pacific Plate2. Black dashed lines are from ref. 74. (b) Topographic map of studied area (EC). Black triangles indicate monogenetic cones of the EC, the true heights of which are 200–600 m and the relative elevation is ~200 m. The slab depth is 50–80 km (dotted lines)2 and the thickness of the crust is 25–30 km75, 76. Sampling was performed at the top and/or hillside on 8 cones (filled black triangles) from which 16 fresh lavas were obtained for use in this study. Figure 1a was generated by using Generic Mapping Tools77. The inset was captured from Google Earth™ with the map data provided by NOAA, U.S. Navy, NGA, GEBCO. Figure 1b was captured from OpenStreetMap with the map data provided by © OpenStreetMap contributors, CC-BY-SA. All figures were overlaid by using Canvas 11.
