Technical Data
On July, 2009, an initial feasibility study was conducted by KORES (Korea Resources Corporation), a state-owned corporation of the Republic of Korea. This study included on field engineering survey and sampling of the initial exploration area as well as technical review of past surveys conducted by the Former Soviet Union and Kyrgyzstan governments. This study has found that the site contains on the average 1 gram per ton of material. Financial information can be found in the project overview.
Sampling Results
Out of the 13 sampling pit sites investigated, 8 sites had gold visible to the naked eye approximately sized 1mm and 4 sites had gold sized in the 0.5mm range.
Sampling Pits
As part of this study, 13 sampling pits 1.9 meters to 4.1 meters in depth have been excavated and surveyed. Surveys included grade analysis and sampling. The samples taken were subsequently hand panned to separate out the gold. Using strictly gravity methods the study has found that placer gold mine in this zone has 0.11g/m3 ~ 1.13g/m3, which provides the potential for high return. Locations of gold finds and soil characteristics of the 13 sampling pits can be found in the following figures. Figures show vertical cross-sections of all the sampling pits.
Figures - Vertical Column of Sampling Pits
Sample Collection and Processing
In general, an alluvial placer gold deposit has a gold containing - sandy layer (gold soil layer) located on the straightened – upper area of its bedrock where placer gold tends to collect. Thus, when such a mineral mine is explored or excavated. they contain different material types that are deposited such as clay, sand, bitumen, etc. Due to survey conditions, soil characteristics were categorized and 1~2 samples per sampling pit for each of the 13 sampling pits were collected, panned and analyzed for gold content.
Samples being collected Hand Panning Gold containing samples being dried
Sample Drilling Gold Containing Quartz Vein Sample Paning
The sampling of the pits consisted of collecting a volume of 7.2 liters homogeneously at random sections on the 4 faces of the wildcat at specified depths. These samples were hand panned in the field. The gold and black sand containing samples were collected after this 1st stage. The samples were then give a 2nd precision panning in the labs in South Korea. This produced placer gold samples for weighing and analysis. The weight of the placer gold extracted from the 7.2 liters of soil samples that were collected were calculated into weight per unit volume (g/m3), and the results are shown in Table
The result of the 18 collected samples show the placer gold weights of 0.86mg ~ 8.21 corresponding to weights of 0.11g/m3~1.13g/m3. Based on this, developing the initial exploration area is advisable. There is potential for major finds at depths near the bedrock. Additional prospecting will increase profitability numbers.
Purity Analysis
The placer gold obtained from the sampling pits were added together by general sampling sidetracks into 4 samples. These samples were then analyzed for purity and particle size by KICET, Korean Institute of Ceramic Engineering and Technology, an institute sponsored by the government of South Korea. KICET provides R&D, analysis, testing and technology support. In general, the farther away from its originating area containing primary gold the placer gold mine is, the higher the gold purity you get. It is because the placer gold is separated from impurities. The purity varies depending on environments usually within 70 % in the upstream region; within 80% in the downstream region.
The average purity of the placer gold collected in this mining has been calculated at 82.2%, which suggests different levels from those in the upstream region.
[Table 2] Results of the Purity Analysis and Sample Pictures
Sample Collected Samples Au Purity Picture
GPU1
B1-3
B1-7 middle
B1-3’ middle
B1-3’ low
81.4%
GPU2
B2-3
B3-2 middle
B3-2 low
84.4%
GPU3
B4-3
B5-1 low
B5-4 middle
NP
79.2%
GPU4
LNP-1 middle
LNP-1 low
LNP-2 low
83.9%
Average of 14 Samples
82.2%
Particle size Analysis
The particle-size analysis was carried out using a polarizing microscope by KICET. First the magnetic minerals and non-magnetic minerals were separated through magnetic separation. The different kinds of component minerals, features and size distributions of the particles were observed.
It was found that magnetic minerals are composed of magnetite ores and ilmenite with particle sizes ranging from 0.1 mm ~ 0.35 mm.
It was further observed that placer gold sizes ranged from 0.2 ~ 1.2 mm. They are mostly flat, thin and rounded. Magnified photos show the different features and shapes, and can be contrasted to sharp angled shapes of the sandy non-magnetic samples.
[Table 3] Particle Size Analysis Results
Sample Low Magnification (x2.5) High Magnification (x5)
GPU1
GPU2
GPU3
GPU4
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