TY  - JOUR
A1  - Nielsen, Sune G.
A1  - Marschall, Horst R.
T1  - Geochemical evidence for mélange melting in global arcs
T2  - Science Advances
N2  - In subduction zones, sediments and hydrothermally altered oceanic crust, which together form part of the subducting slab, contribute to the chemical composition of lavas erupted at the surface to form volcanic arcs. Transport of this material from the slab to the overlying mantle wedge is thought to involve discreet melts and fluids that are released from various portions of the slab. We use a meta-analysis of geochemical data from eight globally representative arcs to show that melts and fluids from individual slab components cannot be responsible for the formation of arc lavas. Instead, the data are compatible with models that first invoke physical mixing of slab components and the mantle wedge, widely referred to as high-pressure mélange, before arc magmas are generated.
KW  - Nd isotopes
KW  - Sr isotopes
KW  - Subduction zone
KW  - mantle melting
KW  - mass transfer
KW  - melange
KW  - slab-mantle mixing
Y1  - 2017
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/75751
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-757518
SN  - 2375-2548
VL  - 3
IS  - 4, art. e1602402
PB  - American Association for the Advancement of Science
CY  - Washington, DC
ER  -