• journal_title：Geology
• Contributor：Christophe Monnier ; Jacques Girardeau ; René C. Maury ; Joseph Cotten
• Publisher：Geological Society of America
• Date：1995-
• Format：text/html
• Language：en
• Identifier：10.1130/0091-7613(1995)023<0851:BABOFT>2.3.CO;2
• journal_abbrev：Geology
• issn：0091-7613
• volume：23
• issue：9
• firstpage：851

The East Sulawesi ophiolite is one of the three largest ophiolites in the world. It displays all the components of a typical sequence, from residual mantle peridotites to cumulate gabbros, sheeted dolerites, and lavas of normal mid-oceanic-ridge basalt (MORB) composition. Trace element data on the lavas and dolerites, and particularly their depletion in Nb compared to neighboring incompatible elements, suggest a subduction-zone environment for their origin. The chemical similarity between the East Sulawesi ophiolite lavas and those from the Eocene Celebes Sea back-arc basin crust together with their identical age strongly suggest a back-arc tectonic environment for this ophiolite, which represents a fragment of the Eurasian plate obducted onto the East Sulawesi basement of Australian origin.