SUMMARY

Distribution feature and potential of graphite ore in the Làng Chang area,

Bảo Thắng district, Lào Cai province

Vũ Đình Tải, Vũ Quang Lân, La Mai Sơn,

Thái Bình Dương, Nguyễn Trọng Dũng, Nguyễn Công Thuận

Geological mapping and mineral survey of the Phố Lu - Bắc Than Uyên sheets at scale of 1:50.000 was conducted by the Northern geological mapping Union of Vietnam. The study results indicated the Thái Niên structure belonging to the Red River structural Zone has prospect of graphite mineralization. The graphite mainly concentrates within the area of Ngòi Chi metamorphic rocks. The detailed investigation in geology and minerals in the Làng Chang location identified some industrial ore bodies of graphite, which have an average thickness and length of 1.75-4.55 m and 1-8 km, respectively. The ore bodies develop in the NW-SE direction and their carbon contents ranging from 10.25 to 19.01%. The main ore-forming minerals are graphite and scare of hematite, pyrite, and chalcopyrite. Graphite exsits in the form of small to medium flakes and regularely oriented disseminated in the metamorphic rocks. Sometimes it formed small patches or thin bands lying in the laminated surfaces of the rocks. These are important premises for survey and assessment of graphite ore in Lào Cai area in particular and in the Red River structural Zone in general.

Keywords: graphite ore, Làng Chang, Red River structural Zone.