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Geological Info
Note: Double click on any image to enlarge
Location Maps
CUMO property general location map |
CUMO property Idaho terrain location map |
CUMO property - Area map with SPOT image |
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Scenic Photos
View looking south toward CUMO property |
Road access at Cumo view looking South-West |
View looking across Copper Gulch |
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History
Originally staked by the Curwood Mining Company in 1968, the property was optioned by Midwest Oil Corporation in 1969. Between 1968 and 1972, Midwest drilled 8 (eight) holes totally 5,201 feet (162 meters) and did geological mapping, geophysical surveys and surface sampling. In 1973 AMAX exploration optioned the property from Midwest.
In late 1973 AMOCO absorbed Midwest Oil and became the joint venture partner with AMAX. Between 1973 and 1981 AMAX drilled 17 holes totaling 30,821 feet (9,394 meters), majority of the holes were large diameter diamond drill holes with three being reverse circulation holes.
Several significant thick intersections of Molydenum bearing mineralization were intersected however with the drop in Molybdenum prices to all time lows, interest in the property waned. In 1983 the property was returned to AMOCO, who were in the process of divesting themselves of all mineral properties and as such the property was allowed to lapse. In 1997, the property was staked by the Cumo Molybdenum company who optioned the property to Mosquito in the fall of 2004.
Geologically the CUMO Property is situated along the northeast trending Trans-Challis Structural Zone in a complex assemblage of Tertiary age felsic dykes and stocks that intrude quartz monzonite of the Idaho batholith. Molybdenum-copper mineralization is associated with sub-surface rocks that AMAX interpreted as late stage magmas and their volatile magmatic differentiates.
Two inverted, cup-shaped overlapping shells of mineralization are interpreted where a weaker upper shell is partially eroded and lies vertically and horizontally displaced from a deeper, more strongly mineralized zone
List of significant intersections from Previous Drilling by AMAX.
Hole |
length |
From |
To |
length |
MoS2 |
Cu |
AG |
Cu |
Number |
feet |
feet |
feet |
feet |
% |
% |
Gms/T |
eq. % |
DDH-1 |
1884 |
231 |
1884 |
1653 |
0.062 |
0.12 |
2.7 |
1.68 |
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|
390 |
470 |
80 |
0.930 |
0.15 |
2.6 |
21.24 |
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|
1700 |
1884 |
184 |
0.100 |
0.08 |
1.2 |
2.44 |
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|
Hole stopped in mineralization |
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DDH-5 |
1416 |
450 |
1416 |
966 |
0.060 |
0.13 |
4.5 |
1.68 |
DDH-9 |
804.6 |
460 |
804.6 |
344.6 |
0.077 |
0.20 |
7.2 |
2.24 |
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|
Hole stopped in mineralization |
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DDH-10 |
2381 |
220 |
2160 |
1940 |
0.101 |
0.05 |
1.5 |
2.40 |
DDH-11 |
3003 |
140 |
2428 |
2288 |
0.074 |
0.05 |
1.4 |
1.79 |
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|
1300 |
1960 |
660 |
0.127 |
0.03 |
0.4 |
2.93 |
DDH-13 |
1804 |
680 |
1804 |
1124 |
0.111 |
0.05 |
2.0 |
2.63 |
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Hole stopped in mineralization |
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DDH-14 |
2123.8 |
780 |
2124 |
1344 |
0.114 |
0.06 |
1.9 |
2.72 |
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|
1200 |
1960 |
760 |
0.151 |
0.06 |
1.9 |
3.55 |
DDH-15 |
1933.2 |
600 |
1933 |
1333 |
0.114 |
0.06 |
1.8 |
2.72 |
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|
1260 |
1880 |
620 |
0.153 |
0.02 |
0.8 |
3.49 |
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|
Hole stopped in mineralization |
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DDH-16 |
2137.7 |
1000 |
2132 |
1132 |
0.093 |
0.05 |
1.9 |
2.21 |
DDH-17 |
2281.5 |
1160 |
2282 |
1122 |
0.065 |
0.08 |
2.6 |
1.67 |
DDH-18 |
2361 |
1400 |
2361 |
961 |
0.129 |
0.08 |
2.7 |
3.11 |
DDH-19 |
2280 |
120 |
2280 |
2160 |
0.102 |
0.08 |
2.3 |
2.49 |
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1880 |
2120 |
240 |
0.128 |
0.06 |
2.5 |
3.05 |
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Hole stopped in mineralization |
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DDH-20 |
2543 |
165 |
325 |
160 |
0.060 |
0.09 |
2.7 |
1.56 |
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|
365 |
1800 |
1435 |
0.071 |
0.12 |
4.0 |
1.90 |
DDH-25 |
1011 |
190 |
1011 |
821 |
0.071 |
0.14 |
2.4 |
1.91 |
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|
740 |
1011 |
271 |
0.090 |
0.14 |
3.0 |
2.36 |
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Hole stopped in mineralization |
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DDH-26 |
1193 |
30 |
110 |
80 |
0.051 |
0.10 |
1.5 |
1.37 |
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|
320 |
750 |
430 |
0.037 |
0.22 |
10.9 |
1.44 |
Notes:
Copper equivalent (Cu. Equiv.) is based on the following metal prices (all in US$): Copper $1.50/lb, Molybdenum Trioxide ($15/lb), and Silver $10/ounce. Other factors include 1% equals 20 pounds; 1 ppm equals 1 gm/T; 1000 ppb equals 1 ppm equals 1 gm/T.
Molybdenum is sold as either ferro-molybdenite or molybdenum trioxide. The price used is $15 per pound Molybdenum trioxide. To obtain the amount of Molybdenum trioxide that can be produced from MoS2, the following is required: convert MoS2 to Mo by dividing MoS2 by 1.6681 then convert to MoO3(Molybdenum Trioxide) by multiplying by 1.5. Therefore the amount of Molybdenum trioxide is pounds MoS2 times 1.5/1.6681.
Copper equivalent has not been adjusted for metallurgical recoveries but simply reflect the total value of contained metal in the samples. Extensive metallurgical testing will be required to obtain the expected recoveries. Several existing mines currently are obtaining good recoveries (+70%) from similar grade material. It should be noted that this does not imply that good recoveries can be expected from this mineralization without metallurgical testing, but simply indicates that it is possible.
Historic Geology Maps and Sections
Cumo Geology Map
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Cumo Project Cross Section A-A Looking West
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Cumo Project Cross Section B-B Looking West
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Cumo Project Cross Section C-C Looking West
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Cumo Project Cross Section D-D Looking West
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