Na Son ore area (Ha Giang) distributed in the
north of the Lo Gam, from ore zone Cho
Dien about 100km north. It has
now been two Pb-Zn mine and some of the ore
distribution in Devonian sedimentary formations soon
(D1-D1 cells ml). Lithological composition of the layers
of sediment were significantly different than those described above in the
presence of the volcanic source rocks - quartz porphyritic
him, felzit and trachyte. The stones are interspersed with rock
and limestone wafers with a thickness of more common to
1000m. These deposits are mainly distributed in practice
captive limestone and marked by solidarity broke
canceled tectonic NW - SE.
This ore deposits in the characteristic texture
disseminated - circuit and special Nazi tendon. List
of ore mineralogy are slightly different from the
previous ore, sphalerite and galena in addition, universal
variable pyrite, chalcopyrite and tetraedrit, pyrotin, fish bietco both apatite - rich rare earth minerals.
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