@inbook{9157fb2d48a041cab43e5fe4d7388d41,
title = "Describing chemical fluxes in subduction zones: Insights from {"}depth-profiling{"} studies of arc and forearc rocks",
abstract = "Trace element systematics in convergent margin metamorphic and volcanic rocks show that subducting slabs release fluids of changing composition as a function of depth. Volcanic transects across arcs record declines in H20-soluble elements (B, Cs, As, and Sb) with increasing depth that parallel declines with increasing metamorphic grade in {"}subduction complex{"} associations. These paired, prograde declines point to decreasing inputs of H20-rich fluids from the subducting slab. Uniform K, Ba, REE and l^Be levels across arcs suggest that slab-derived fluxes of different compositions persist to greater depths. Slabs returned to the mantle via subduction should have profoundly fractionated chemical signatures, and substantial fluid releases should occur through forearc regions. Serpentinites from the Marianas forearc show elevated B contents, and fractionated trace element signatures suggesting inputs of fluids like those released from metamorphosed slabs at low temperatures.",
author = "Jeff Ryan and Julie Morris and Gray Bebout and Bill Leeman",
note = "Funding Information: Aknowledgments. Thanks to A. Tsvetkov for providing samplesa nd data from the Kuriles, and to Steve Shirey, Brady Byrd, and Dave Kuentz for their aid in analyzingK uriles and Catalina samples on the ICP at DTM. Thanks also to C. Edwards, D. Miller, T. Plank, A.F. Hochstaedter, M. Defant, and P. Kepezhinskasfo r discussionsw hich led to insights,a nd for helping to create a ferment of subductionth inking through which the first authorh as had the pleasureo f swimmingf or the past ten years. This work was supportedb y NSF Grants EAR90-04389 to Morris and Tera, EAR91-19110 to Leeman, and EAR92-05804 to Ryan, Hochstaedtera, ndDefant. Publisher Copyright: {\textcopyright} 1996 by the American Geophysical Union.",
year = "1996",
doi = "10.1029/GM096p0263",
language = "English",
isbn = "9780875900780",
series = "Geophysical Monograph Series",
publisher = "Blackwell Publishing Ltd",
pages = "263--268",
editor = "Bebout, {Gray E.} and Scholl, {David W.} and Kirby, {Stephen H.} and Platt, {John P.}",
booktitle = "Subduction Top to Bottom, 1996",
}