Basalts from the Baerleike ophiolitic mélange in the West Junggar occurred with serpentinite, radiolarian chert, and muddy siltstone and tuff from the Late Devonian Tielieketi Formation. Based on geochemical analysis, the alkaline basalts have typical geochemical characteristics to those of OIB, with low SiO2 (42.15%~44.71%), high TiO2 (3.17%~3.77%), Na2O (1.73%~2.28%), low Al2O3 (13.54%~14.31%), K2O (1%~1.82%) and moderate MgO (6.75%~8.14%, Mg#=43~46). The REE distribution patterns are similar to the one of OIB, with ∑REE=186×10-6~219.06×10-6, LREE enrichment ((La/Yb)N=11.37~12.62), weak Eu negative anomaly (Eu/Eu*=0.96~1), high Ti/Yb and Zr/Yb ratios (7395~8724, 120~136, respectively). It is assumed that the magma extruded into ocean island or seamount of the ocean floor, The geochemical characteristics of the basalts show they have ocean island basalts, derived from EMI type enriched-mantle. Petrogenesis is closely related to asthenosphere mantle, asthenospheric mantle upwelling led to a large proportion of spinel lherzolite mantle partial melting to forming the basalt magam. Moreover, the Devonian oceanic basin in which the basalts from the Baerleike ophiolitic mélange occurred is a remnant oceanic basin formed by shrinking from the West Junggar Paleoceanic Basin.