MIDDLE PROTEROZOIC OPHIOLITES IN THE ALIHE AREA,INNER MONGOLIA

Along the Yiliekede-Alihe Late Paleozoic plate subduction zone there occur many NE-trending ophiolite blocks of varying sizes,whose formative age is Middle Proterozoic. Thispaper systematically describes the sequence,rock association,mineral composition, petro-chemical features and age of emplacement.