Tale of two migmatites and leucogranite generation within the Himalayan Collisional Zone: Evidences from SHRIMP U-Pb zircon ages from Higher Himalayan Metamorphic Belt and Trans-Himalayan Karakoram Metamorphic Belt, India - Singh, Sandeep; Barley, Mark E; Jain, AK (Himalayan Journal of Sciences, 2008)