C. Johan Lissenberg and Henry J. B. Dick (2008). "Melt-rock reaction in the lower oceanic crust and its implications for the genesis of mid-ocean ridge basalt." EARTH AND PLANET SCI LETT 271(1-4): 311-325

Transport of melt through the lower oceanic crust is a poorly understood phenomenon. However, it may have a large effect on the compositions of both lower crustal cumulates and the most abundant magma on Earth, mid-ocean ridge basalts (MORB). We studied gabbroic rocks from the Kane Megamullion, on the Mid-Atlantic ridge, and found evidence that melt was transported in diffuse cm-wide channels. Mineral compositions and textures indicate that melt flow in these channels is reactive. We modeled this reaction to constrain its effect on melt composition, and compared the results with MORB data. Using PetDB allowed a rigorous comparison of our model melt composition with the full spectrum of melts erupted along the Mid-Atlantic Ridge. Results suggests that MORB may owe part of their compositional variation, previously attributed to fractional crystallization at elevated pressures in the mantle, to reactive transport in the lower crust. - C. J. Lissenberg

 

C. Johan Lissenberg and Henry J. B. Dick (2008). "Melt-rock reaction in the lower oceanic crust and its implications for the genesis of mid-ocean ridge basalt." EARTH AND PLANET SCI LETT 271(1-4): 311-325 doi:10.1016/j.epsl.2008.04.023



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