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An almost unmodified MORB-source mantle appears to underlie the central part of the back-arc. Subduction components are found at the northern and southern ends of the ridge, and there is a marked sediment melt input of up to 2% in segment E4. Enriched (plume) mantle is present beneath segment E2 at the northern end of the ridge, suggesting that plume mantle is flowing westward around the edges of the subducting slab. The southern part of segment E8 is unique in that its magma source is similar to sub-arc depleted mantle.<\/jats:p>","DOI":"10.1093\/petrology\/43.8.1435","type":"journal-article","created":{"date-parts":[[2002,9,30]],"date-time":"2002-09-30T18:33:00Z","timestamp":1033410780000},"page":"1435-1467","source":"Crossref","is-referenced-by-count":174,"title":["Petrogenesis of the Back-arc East Scotia Ridge, South Atlantic Ocean"],"prefix":"10.1093","volume":"43","author":[{"given":"S.","family":"FRETZDORFF","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R. A.","family":"LIVERMORE","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C. W.","family":"DEVEY","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P. T.","family":"LEAT","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"STOFFERS","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2002,8,1]]},"reference":[{"key":"2025061002465111600_BIB1","doi-asserted-by":"crossref","unstructured":"Alvarez, W. (1982). Geological evidence for the geographical pattern of mantle return flow and the driving mechanism of plate tectonics. Journal of Geophysical Research\n\u00a087, 6697\u20136710.","DOI":"10.1029\/JB087iB08p06697"},{"key":"2025061002465111600_BIB2","doi-asserted-by":"crossref","unstructured":"Baker, P. E. (1968). Comparative volcanology and petrology of the Atlantic islands arcs. Bulletin Volcanologique\n\u00a032, 189\u2013206.","DOI":"10.1007\/BF02596591"},{"key":"2025061002465111600_BIB3","doi-asserted-by":"crossref","unstructured":"Baker, P. E. (1990). South Sandwich Islands. 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