Investigating the Lid Effect in the Generation of Ocean Island Basalts
Shihao Jiang,
Rhys Hawkins,
Mark James Hoggard
et al.
Abstract:Ocean Island Basalts (OIBs) are generated by mantle plumes, with their
geochemistry controlled by a combination of source composition,
temperature, and thickness of overlying lithosphere. For example, OIBs
erupting onto thicker, older oceanic lithosphere are expected to exhibit
signatures indicative of higher average melting pressures. Here, we
quantitatively investigate this relationship using a global dataset of
Neogene and younger OIB compositions. Local lithospheric thicknesses are
estimated using theoreti… Show more
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