Abstract

Area of mineralization is located in the Khao Lộc Subzone of the Sông Lô Zone, belonging to the East Bắc Bộ folding region [1]. They are composed of terrigenous sediments intercalated with metamorphosed carbonate. During the process of geological mapping and mineral survey, geologists of the Intergeo Division have discovered many ore-bearing areas: Bản Vai, Bản Ran, Bản Bó, ... and lead-zinc ore bodies were assessed. Especially, a part of the Bản Bó ore body has been explored with the reserves reaching up to over 200 thousand tons of lead-zinc ore. The mineral composition of ores consists mainly of pyrite, sphalerite, galenite, marcasite, pyrrhotine, chalcopyrite, baryte, quartz, dolomite; secondary minerals: smithsonite, calamine, anglesite, cerussite, limonite and goethite.

The Bản Vai - Bản Ran - Bản Bó lead-zinc mineralization is of hydrothemal genesis of from lower to medium temperature.