///The newly-found Tuerkubantao ophiolitic mélange is located in the south of the Buerjin, Altay area, oft-com:office:smarttags" />China. It suggests that the generation of the ophiolite and ocean-crust subduction was at the end of the Late Devonian. The geochemical characteristics of ultramafic-mafic rocks and basalt suggest that they may belong to low alkali, low Ti and Mg-rich tholeiite series and that the basalt may have been formed in MORB-like tectonic setting. The gneissic granite in the mélange belt may belong to sodium or low-K series and occurred in volcanic arc or syn-collision tectonic setting that was also related with the ocean-crust subduction. Tuerkubantao ophiolite, together with Kekesentao, Qiaoxiahala and Buergen ophiolites constitute an ophiolitic mélange belt along the Irtys fault, which belongs to the Zaysan-Kekesentao-South Mongolia geosuture zone dividing the Siberian Plate from the Kazakhstan-Junggar Plate.oft-com:office:office" />
