The present study has been carried out to determine the chromian spinel and platinum group elements (PGEs) geochemistry of podiform chromitites of Dargai Complex which provides significant information regarding the mantlecrust transition zone (MTZ) to mantle section during the emplacement and genesis of ophiolitic complexes. The mineral chemistry and platinum group elements (PGEs) were analysed using the Electron Probe Micro Analyzer (EPMA) and inductively-coupled plasma mass spectrometer (ICP-MS). Chromian spinels in the high-Cr chromitites (Cr# >60), harzburgite and mantle dunites have much higher Cr# values in the range of 78.4 to 81.9, 72.2 to 77.5 and 79.8 to 82.6, respectively. However, the chromian spinels in the high-Al chromitites (Cr# <60) and MTZ dunites have much lower Cr# values in the range of 47.5 to 52.9 and 46.7 to 49.4, respectively. Based on behaviours of PGEs, the chemical differences are reflected in these two types of chromitites. The Ir-group (IPGE) concentration is relatively higher than the Pt-group (PPGE) in the high-Cr chromitites, while high-Al chromitites have relatively greater PPGE/IPGE ratios. The melts responsible for the formation of High-Cr chromitites exhibit boninitic affinities, while that of the high-Al chromitites show mid ocean ridges basalt (MORB) signature with hydrous, oxidized and TiO 2 poor characteristics. Chromian spinel mineral chemistry and PGE geochemistry data confirm that the coexistence of both types of chromitites in the Dargai Complex may indicate a change in the composition of the parent magma from MORB to boninitic type in a proto fore-arc environment during subduction initiations. This coexistence of compositionally different mantle suites with episodic melting histories in a single ophiolitic complex can be attributed to the mechanically juxtaposition of mantle convection during recycling process within the mantle.