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The Woodlark Spreading Center (WSC) is subducted at the San Cristobal trench, forming a triple junction at the New Georgia Group (NGG) arc in the Solomon Islands. WSC lavas are N-MORB at >100 km from the trench, but with decreasing distance they have increasingly arc-like Sr–Nd–Pb isotopic ratios, enrichments in Rb>K>Pb>Sr, and depletions in HFSE and Y. Within 50 km of the trench on the...
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