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TitleThe sub-ophiolitic melange of the island of Lesbos, Greece
AuthorPe-Piper, G; Piper, D J W; Matarangas, D; Varti-Matarangas, M
SourceNeues Jahrbuch für Mineralogie, Monatschefte Jg. 2001, Heft 6, 2001 p. 241-260
Alt SeriesGeological Survey of Canada, Contribution Series 2000291
Lat/Long WENS 20.0000 28.0000 42.0000 34.0000
Subjectsgeochemistry; igneous and metamorphic petrology; mineralogy; sedimentology; ultramafic rocks; ophiolites; oceanic crust; gabbros; basalts; sedimentary rocks; igneous rocks; whole rock geochemistry
Illustrationslocation maps; geological sketch maps; photographs; tables; geochemical plots; ternary diagrams; cross-sections, stratigraphic; graphs
ProgramNSERC Natural Sciences and Engineering Research Council of Canada
AbstractJurassic ultramafic ophiolitic rocks on the island of Lesbos are thrust over dismembered ocean-crust gabbro and basalt and a sub-ophiolitic melange including deep-water sedimentary rocks, within-plate basalts probably derived from seamounts, and ophiolitic basalts. The various igneous rock types are petrographically characterised and distinguished on the basis of their whole-rock geochemistry. The tectono-stratigraphy is unlike that of other ophiolites of northeastern Greece, indicating a different origin for the Lesbos ophiolites. Amphibolite sole ages and regional stratigraphy suggest that the Lesbos ophiolites were emplaced from a Neotethyan ocean between the Sakarya and Rhodope microcontinental blocks.