** Chilwa Minerals CHW.AX rises 7.7% to A$0.700, highest since April 14
** Stock set for biggest intraday pct gain since January 31
** Mineral explorer says assay results show significant Total Heavy Minerals $(THM)$ grades and widths at the Mposa deposit in Malawi
** Stock down 6.7% YTD
(Reporting by Manasi Dasa in Bengaluru)
((Manasi.DasaSundeep@thomsonreuters.com;))