Dehydration-Melting Phenomena in Leptynitic Gneisses and the Generation of Leucogranites: a Case Study from the Kerala Khondalite Belt, Southern India - I. BRAUN1, M. RAITH1 AND G. R. RAVINDRA KUMAR (JOURNAL OF PETROLOGY VOLUME 37 NUMBER 6 PAGES 1285-1305 1996, 1996)