Research identify the group for lead – zinc ore type to prepare exploration in Ban Lim area, Caobang province, VietnamLuong Quang Khang, Khuong The Hung, Nguyen Phi Hung and Dang Minh TonE3S Web Conf., 168 (2020) 00011DOI: https://doi.org/10.1051/e3sconf/202016800011