Boron subduction slabs

Palmer M. R. (1991) Boron-isotope systematics of Halmahera arc (Indonesia) lavas evidence for involvement of the subducted slab. Geology 19, 215-217. 

Brenan JM, Ryerson FJ, Shaw HF (1998) The role of aqueous fluids in the slab-to-mantle transfer of boron, beryllium, and lithium during subduction Experiments and models. Geochim Cosmochim Acta 62 3337-3347... 

This chapter focuses on subduction zone processes and their implications for mantle composition. It examines subduction contributions to the shallow mantle that may be left behind in the wedge following arc magma genesis, as well as the changing composition of the slab as it is processed beneath the fore-arc, volcanic front and rear arc on its way to the deep mantle. Much of this chapter uses boron and the beryllium isotopes as index tracers boron, because it appears to be completely recycled in volcanic arcs with little to none subducted into the deep mantle, and cosmogenic e, with a 1.5 Ma half-life, because it uniquely tracks the contribution from the subducted sediments. 

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