Vietnam's untapped graphite resource

• Autores: Industrial Minerals
• Localización: Industrial Minerals, ISSN 0019-8544, Nº. 554, 2013
• Idioma: inglés
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• Resumen

  • The host rocks of graphite are crystalline schist, quartzite, intruded by Proterozoic and Paleozoic granites and pegmatite. These are established in Tien An, Hung Nhuong and Tra Bong deposits. Of these Hung Nhuong is the largest and the oldest graphite mine in Vietnam (Figure 1) Graphite from the Lao Cai deposit is crystalline and is therefore easily enriched by flotation. It is possible that graphite from Lao Cai could recover a concentrate over 80% C, or possibly to 90% C. The sulphur content in the ore increases the deeper one goes, but is easily isolated with processing.

    About 60km southeast of Lao Cai City lies the [Bao Ha] deposit. A total of 21 ore bodies have been discovered in four sectors: Lang Chun; Lang Ma; Lang Khoai; and Xom Tap. The probable reserve of 11 bodies preliminarily prospected is 730,000 tonnes and the estimated resource of 21 bodies is 1.7m tonnes of graphite. In the Lang Chun sector, the ore bodies are concentrated in relatively large thickness. The probable reserve is 520,000 tonnes of graphite. This is the most prospective area, where there is need to be followed up with exploration.