Melting History and Magmatic Evolution of Basalts and Picrites from the Accreted Wrangellia Oceanic Plateau, Vancouver Island, Canada

Future accreted terranes: a compilation of island arcs, oceanic plateaus, submarine ridges, seamounts, and continental fragments

“…Approximately 6 km of exposed stratigraphic thickness, correlated to the sedimentary and upper crustal layers of the Wrangellia oceanic plateau, is found in Vancouver Island (Greene et al, 2010). Wrangellia's exposed units are composed of limestone and pelagic sediments, pillow lavas, massive flood basalts, subaerial and submarine flows, and olivine-rich basalts (Greene et al, 2009(Greene et al, , 2010. In other accreted oceanic plateaus, the preserved crustal thicknesses can be as low as 2-7 km thick.…”

U-Pb geochronology and geochemistry of intrusive rocks from the Cougar Creek Complex, Wallowa arc terrane, Blue Mountains Province, Oregon-Idaho

“…Our data synthesis provides the foundation for a new model of ridge subduction and slab window magmatism consistent with the Late Triassic evolution of the Wallowa arc terrane. Recent contributions to the geologic framework of the accreted Wrangellia oceanic plateau (Richards et al, 1991;Greene et al, 2008Greene et al, , 2009aGreene et al, , 2009b, a primary component of the Insular superterrane of Alaska and Canada, provide a more comprehensive basis for comparison with the Wallowa arc terrane. Based on lithostratigraphic, geochemical, geo chronologic, and paleontologic data, the Wallowa arc terrane may be correlated with Wrangellia; we explore the implications of this correlation through the larger-scale tectonic processes of ridge subduction and slab window magmatism.…”

Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province

“…These patterns and the values of the trace element ratios Ti/V > 20 (26.8) and Zr/Nb < 12 (11.7), are characteristic of modern day transitional and alkaline oceanicisland basalts (Pearce, 2008). The (Sm/Yb) N ratio suggests that the mantle source of this basalt was relatively enriched and contained garnet (Greene et al, 2009). The sampled dyke is interpreted as derived from partial melts of a plume-related, deep enriched source that has not been contaminated by active subduction.…”