6. Plan for the implementation of reserve exploration for 9 sub-areas of Ban Bo area No. Label of exploration sub- area Level of priority for reserve exploration (decreasing from 1 to 3) Time (starting in 3/2013 and ending in 1/2015 7/201310/20137/20141/2015 1KB-CuNi > 2BB-CuAu > 3BB-CuAu > 4BB-CuAu > 5BB-CuAu > 6BB-CuAu > 7 BB-CuAu-01 (Houy kham) > 8Leck1-CuNi > 9Leck2-CuNi > V. Detailed introduction on Khoam Bang multi-metal mine area - Khoam Bang Mountain is a part of the m-wide and 7000m-long strip of ultramafic-magma rocks containing multi- metal ores (Cu, Ni, Co, Au, etc.). This strip is arc-shaped and surrounds the 518m- mountain peak. - Khoam Bang Mountain can be considered as a multi-metal laterite mine with the main metals: Cu, Ni, and Fe. In addition, Cr, W, Au, and Co are also the accompanying elements. The amount of ore is high and the mining conditions are convenient because the mine is completely open-cast. - Khoam Bang mine covers an area of 25ha, of which 5.3 ha is the top of the mountain - Khoam Bang mine comprises 2 types of ore: + Type 1: ore in the bedrocks below the weathered zone + Type 2: ore in the weathered zone - Khoam Bang mine is bordered by altered diorite masses Khoam Bang mountain- a multimetal opencast mine 2. Implemented works in Khoam Bang multi-metal mine The explored area and implemented works in the Khoam Bang multi-metal mine Zone Concentration (%) NiFeMgSiCr Yellowish red limonite 0,2 1,051 524,8 5,41,1 1,2 Brown and dark gray limonite 0,8 1,260 621,7 1,90,8 1,5 Saprolite 252520 2612 1416 200,3 0,5 Analytical results of Ni-Fe laterite ore 3. Element concentrations in the weathered zone - In Khoam Bang mine, 27 digging holes (the shallowest is 8m and the deepest is 15m deep) were carried out. - Number of boreholes: 8 (the shallowest is 54m and the deepest is 132m deep) - Number of lines for soil sampling: 8 Area (m 2 ) Averaged thickness (m) Amount of ore (with density of 2.2 tons/m3) Average concentration Amount of metal NiFeNi (tons)Fe(tons) The lower part without the outcrop of bedrocks (19.7 ha) 197,000104,334, %58%39,0063,867,262 The higher part with the outcrop of bedrocks (5.3ha) 53, , %52% 1, ,920 Total 40, ,007,182 Reserves of Ni and Fe in the weathered zone The value of ore in the weathered zone FeNi Price ($/ton)70 20,000 Total value ($) 280,502, ,602,000 Analytical results of soil samples at 9 m depth in the red soil layer in hole No. 1 Analytical results of soil samples at 5 m depth in the blackish blue soil layer in hole No. 3 Analytical results of soil samples at 6 m depth in the black soil layer in hole No. 4 Analytical results of samples at 9 m depth in the saprolite zone in hole No. 4 Analytical results of soil samples at 4 m depth in the blackish brown soil layer in hole No. 5 Analytical results of samples at 4 m depth in the saprolite zone in hole No. 5 Analytical results of soil samples at 8 m depth in the blackish brown soil layer in hole No. 6 Analytical results of soil samples at 3 m depth in the yellow soil layer in hole No. 6 Analytical results of samples at 1 m depth in the saprolite zone in hole No. 8 Analytical results of samples at 1 m depth in the saprolite zone in hole No. 9 Hole Ni-05 with depth of 13m 4. Element concentrations in the type 1s ore (bedrocks below the weathered zone) Borehole KBD1Borehole KBD6 18m45m55m71m41m51m56m57m Al2O3 % CaO Fe2O K2O MgO MnO P2O TiO Ag ppm