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The Spontang ophiolite complex exposed along the Indus Tsangpo Suture Zone (ITSZ) represents a fragment of oceanic lithosphere emplaced after the closure of the Neo-Tethyan Ocean. The complex lying south of the ITSZ forms the highest tectonic thrust slice above the Mesozoic–Early Tertiary continental margin in the Ladakh-Zanskar Himalaya. The complex consists of a well-preserved ophiolite sequence...
Les laves basaltiques de la plaine de Kumba contiennent des xénolithes de péridotites mantelliques à spinelle. Leur minéralogie ainsi que les compositions en éléments majeurs et traces des roches totales et des clinopyroxènes indiquent un manteau supérieur essentiellement lherzolitique, soit fertile, soit très peu fondu, et qui n’a été que peu ou pas affecté par un métasomatisme cryptique. Ce manteau,...
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