HIGH PRESSURE RE-METAMORPHISM OF ENCLAVETYPE GRANULITES FROM THE ARAVALLI-DELHI MOBILE BELT, NW INDIA AND ITS REGIONAL IMPLICATION.: The present study from the Aravalli-Delhi Mobile Belt, in the northwestern part of India demonstrates how granulite enclaves and their host gneisses can be utilised to unravel multistage metamorphic histories of orogenic belts, using three suites of metamorphic rocks: (1) an enclave of pelitic migmatite gneiss-leptynite gneiss, (2) metamorphosed orthopyroxene-bearing granitoids, intrusive into the enclave and (3) an interlayered sequence of garnetiferous metabasite and psammo-pelitic schist/migmatite of host felsic gneiss/migmatite association. Rock associations (1) and (2) constitute the Sandmata Complex, while association (3) constitutes part of the host Mangalwar Complex. The enclave granulites are ~14 km long and 0.4 to 3 km wide, occur within tectonised intrusive orthopyroxene-bearing granitoids and record two stages of garnet growth via biotite melting, in the stability fields of sillimanite and kyanite respectively. The granitoids are of two types: Coronites of charnockitic, quartz mangeritic to enderbitic composition are massive, with megacrystic plagioclase and K-feldspar. Magmatic pyroxenes are variably hydrated, especially, in contact with the enclave granulites, producing titaniferous biotite and hornblende. Coronal garnet±clinopyroxene±quartz assemblages occur around biotite, pyroxenes, plagioclase and hornblendes. The second type of the granitoid, of broadly similar composition and bordering the enclave granulites is, however, migmatitic with porphyroblastic garnet, containing inclusions of biotite, epidote and plagioclase occur in the leucosomes and the mesosomes. The psammo-pelitic schist/migmatites and garnet+clinopyroxene+quartz-bearing metabasite of the Mangalwar Complex occurs as ~10-40 m wide and ~100 m long bands and lenses at the contact of enclave granulites and migmatitic granitoids, within the granulites and also within extremely deformed, non-migmatitic granitoids. These schists/migmatites are distinct from the enclave pelitic granulites by having early stability of staurolite and with garnet growth entirely restricted in the stability field of kyanite. The three suites of rocks have recorded four phases of overprinting deformations (D1-D4), the earliest of which (D1) is noted only in the enclave granulites, in the form of a medium-pressure, granulite facies gneissic banding (S1). Subsequent deformations were uniformly recorded in all the litho-associations.