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 The Orgatash prospect occurs within EMX's Gezart exploration license in the Kyrgyz Republic's Southern Tien Shan gold belt. Orgatash is underlain by hornfelsed shale and siltstone cut by a Permian-aged granodiorite stock. This geologic setting is favorable for the occurrence of intrusion-hosted gold deposits given the well-documented relationship between Permian-aged granite and granodiorite and gold mineralization in the Tien Shan.
 Gold mineralization at Orgatash was first recognized by Soviet geologists in 1980. Soviet soil sampling defined a 2.5 square kilometer area of anomalous gold with elevated levels of silver, arsenic, and bismuth. The mineralization appears to be controlled by a northwest trending shear zone. Eleven Soviet trenches and eight rock sample profiles were sampled along a northeast orientation.
 EMX's 2004 regional stream sediment sampling on the Gezart license returned a strongly anomalous 830 ppb gold sample that directed interest to the Orgatash prospect. In 2005 EMX rehabilitated and resampled two Soviet-era trenches spaced approximately 300 meters apart and oriented perpendicular to the interpreted northwest strike of the gold mineralized trend. The trenches exposed mineralized granodiorite in trench K-36 and hornfels in K-146. (see table below).
 EMX's 2006 program included cutting five new trenches as well as additional re-sampling of trench K- 145 and K-146 to further characterize the grade, continuity, and extent of mineralization. The more than 900 meters of EMX trench samples consistently encountered significant levels of gold mineralization. Approximately 80% of the gold assays were greater than 0.1 g/t, and 60% greater than 0.3 g/t.
EMX's 2007 field work at Orgatash consisted of a comprehensive program of geological mapping, geochemical sampling, geophysical surveys and scout drilling. Over four kilometers of drill road was constructed, an exploration grid measuring 1.6 x 1.6 kilometers was surveyed in, ground magnetic, radiometric and IP surveys were carried out over the exploration grid, and approximately 1000 rock samples from trenches and road cuts were collected. The geophysical studies suggest that the granodiorite intrusion appears to be more extensive then delineated by surface mapping, and define a number of additional exploration targets both within and outside of the current project area. The trenching and rock chip sampling outlined a 500 by 300 meter (open to the northeast and southwest) footprint of anomalous (greater than 0.1 g/t Au) gold mineralization associated with the granodiorite intrusive, and a higher grade (greater than 0.3 g/t Au) 200 by 80 meter anomaly within it.
The 553 meters of trenches excavated in 2007 augmented the 1115 meters of previous EMX trenching, and were extensions to last year's northeast trending trenches, or were cut perpendicular to them. The 2007 trench results are summarized in the table below:
Trench |
Trench Length (m) |
From (m) |
To (m) |
Length (m) |
Grade (g/t Au) |
Comments |
T-1-NE |
50 |
0.0 |
26.2 |
26.2 |
1.50 |
45.3 of 50 meters were over 0.1 g/t Au. Northeast extension of T-1 |
30.0 |
40.7 |
10.7 |
0.64 |
T-7 road |
37.5 |
4.0 |
8.5 |
4.5 |
0.79 |
|
12.0 |
18.9 |
6.9 |
1.09 |
24.0 |
37.5 |
13.5 |
1.77 |
T-8-07 |
77.9 |
3.0 |
13.0 |
10.0 |
1.23 |
Trenched perpendicular to T-1-NE and demonstrates NW-SE grade continuity |
27.7 |
33.2 |
5.5 |
0.59 |
59.9 |
63.9 |
4.0 |
0.55 |
71.9 |
77.9 |
6.0 |
2.49 |
T-9 |
102 |
0.0 |
31.6 |
31.6 |
2.96 |
99 of 102 meters were over 0.1 g/t Au. Trenched perpendicular to T-1 with 138.2 meters at 1.66 g/t Au |
33.0 |
50.0 |
17.0 |
0.61 |
53.0 |
68.0 |
15.0 |
0.46 |
T-15 |
92.5 |
no significant intervals |
dominantly rock chip samples (87%) |
T-16 |
17.0 |
no significant intervals |
13 of 17 meters were over 0.1 g/t Au |
T-17 |
59.8 |
no significant intervals |
|
T-18 |
16 |
0.0 |
16.0 |
16.0 |
1.29 |
|
K-146-07 |
99 |
30.0 |
42.0 |
12.0 |
0.69 |
81 of 99 meters were over 0.1 g/t Au. Southern offset continuation of K-146-06 |
63.0 |
75.0 |
12.0 |
1.28 |
The pervasively mineralized footprint of the Orgatash intrusion-hosted gold system delineates a 350 by 300 meter area that remains open in all directions for further exploration. The best trench (T-1) returned a mineralized interval in granodiorite averaging 1.48 g/t gold over 208.3 meters, with higher grade subintervals of 20 meters averaging 4.52 g/t gold and a 12 meters averaging 5.58 g/t gold.
The pervasively mineralized footprint of the Orgatash intrusion-hosted gold system delineates a 350 by 300 meter area that remains open in all directions for further exploration. The best trench (T-1) returned a mineralized interval in granodiorite averaging 1.48 g/t gold over 208.3 meters, with higher grade subintervals of 20 meters averaging 4.52 g/t gold and a 12 meters averaging 5.58 g/t gold.
Drilling Results:
EMX drilled three core holes totaling 710.1 meters of sampling. Drill hole ODDH-1 was drilled at the northern most limit of the gold mineralized zone delineated by surface sampling. The hole intersected gold mineralization within a hornfels unit, thereby establishing the continuity of gold mineralization below cover and extending beyond the main granodiorite intrusive. Holes ODDH-2 and ODDH-3 intersected significant gold mineralization and altered granodiorite porphyry with abundant sheeted quartz veins and carbonate veining. A tabulation of significant gold intervals is given below.
Drill Hole |
From (m) |
To (m) |
Length (m) |
Grade (g/t Au) |
Comments |
ODDH-1 |
93.4 |
98.7 |
5.3 |
0.38 |
23.7 of 98.7 meters over 0.1 g/t Au |
ODDH-2 |
1.5 |
58.0 |
56.5 |
1.27 |
78.9 of the first 81.9 meters were over 0.1 g/t Au |
including |
3.0 |
32.0 |
29.0 |
1.87 |
ODDH-2 |
70.1 |
77.1 |
7.0 |
0.31 |
ODDH-3 |
4.1 |
17.0 |
12.9 |
0.42 |
ODDH-3 intersected several thin zones of mineralization throughout its entire length including 56.7 to 58.0 meters, 1.3 meters at 59.8 g/Au and from 158.0 to 160.0 meters, 2.0 meters at 8.47 g/t Au |
30.0 |
35.6 |
5.6 |
0.73 |
56.7 |
58.0 |
1.3 |
59.80 |
88.0 |
91.6 |
3.6 |
0.51 |
158.0 |
160.0 |
2.0 |
8.47 |
230.1 |
237.0 |
6.9 |
0.47 |
241.0 |
245.0 |
4.0 |
0.38 |
Core from ODDH-2 (29.8-35.4m). Based on the core logs and trench mapping, the gold mineralized granodiorite intrusion has undergone multiple generations of quartz and carbonate veining and alteration.
EMX's 2007 exploration program has confirmed that Orgatash is a significant intrusion-related gold target with bulk tonnage potential given by the continuity of the mineralization on surface, as well as at depth. With additional geophysical targets further to the southwest and north, Orgatash represents a gold system with significant upside exploration potential for 2008.
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