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| Home > Operations > Eby-Otto Fault Zone |
Eby-Otto Fault Zone
Property Overview
The Nirek property is located in the northeast comer of Eby Township, approximately 10 km southwest of Kirkland Lake. The property consists of 9 leased claims. Sharpley (1999) describes the mineralization and alteration on the property as follows: "A major zone consisting of iron carbonate, silicification and pyritization occurs over a strike length of 1000 m and a width of 200 m on the Allsopp-Huston Property along the Eby-Otto fault, which is a subsidiary of the CadilIac-Larder Lake Break within the Larder Lake Group of tholeiitic volcanics. A zone of silicified breccia occurs within the envelop of alteration with disseminated pyrite over a strike length of 600 m and over a width of 50 m. Geochemical1y anomalous values occur in and around the alteration zone ranging up to 1851 ppb (Au). Moderate to strong induced polarization (chargeability) anomalies occur within the alteration zone over a strike length of 800 m and a width of 100 m".
Silicified, carbonatized and chloritized rock, probably altered mafic volcanic rock, occurs on the access road to the overburden stripped areas at NAD83 Zone 17 562856E I 5325623N. The rock has undergone micro-fracturing with specularite fracture filling and contains up to 15% pyrite. This rock unit is perhaps similar to the silicified breccia described by Sharpley (1999). A similar rock also occurs, probably on strike, 1.45 km to the west northwest in an outcrop on the western side of Hwy 11 at approximately NAD83 Zone 17 561455E / 5325782N.
If the mineralized and hydrothermally altered sites are part of a continuous zone then the strike length could exceed more than 2.0 km. Although the gold content associated with this large mineralized alteration zone is generally low, sporadic gold values ranging up to 1851 ppb make it a very attractive target for further exploration. A number of gold deposits in the Kirkland Lake Resident Geologist District such as the Lightning Zone (Holloway Mine), "flow ore" at the Kerr Mine and the "D" zone at the Cheminis Mine do not come to surface. In the plane and above these orebodies/deposits there is ample evidence at surface for their existence in the form of carbonization, silicification, pyrite mineralization and minor gold mineralization. The best potential for mineralization along this alteration zone should be determined by an IP survey measuring to a depth of 400 m as suggested by Sharpley (1999). Deep drilling should then follow up on the most favourable IP determined sites to ultimately test to a depth of 400 m below surface and possibly beyond.
Location and Access
The property is located 13 km southwest of Kirkland Lake, Ontario and 3 km southeast of Lake Kenogami or 4 km west of Otto Lake in Otto and Eby Townships. The property is accessible from Highway No. 11 at a point 2.6 km southeast of the junction of Highway No. 11 and 66; a truck road extends east for 1.2 km to claim 511329 in Eby Township. The property is also accessible from the intersection of Highway 66 and Otto 1 side road at the west end of Swastika; 2.7 km south on Otto side road; trail leads west 1 km to the grid bush road.
General Geology
The property lies along the Eby-Otto Fault Zone a southwest splay fault off the Larder Lake break. This fault zone is located 1.5 km south of the Cadillac-Larder Lake Deformation Zone. The property lies to the north of the Otto Stock within an area of mafic volcanics, minor sediments and komatiitic basalts. The Eby-Otto Fault Zone crosses the property in a west-southwest direction. This fault marks the boundary between graphitic metasediments and diorite to the north and tholeiitic volcanics to the south. The fault is marked by a 200-metre wide alteration zone (Robinson 1995) consisting of iron carbonate, silification, pyritization, quartz veining and fuchsite alteration.
Eby-Otto Fault Zone - 12 unpatented claim units |
History Of Exploration
1930 - seven diamond drill holes (3,002 feet) by Cheltonia Swastika Mines Limited. |
| C-1 |
154-175 |
Quartz Porphyry: well mineralized by cp |
| C-2 |
250-325 |
Quartz Porphyry: disseminated sulphides |
| C-3 |
300-302 |
0.75 oz Ag / ton; core to 391feet |
| C-4 |
117-118.5 |
0.13 oz Au/ton in quartz vein; mineralized by molybdenite |
| C-5 |
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no record, may have been reported as hole C-7 in records as 2 different records exist for hole #7 |
| C-6 |
363-374 |
8 oz Au/ton in heavy sulphides; |
| |
446-450 |
4 oz Au/ton in vein matter, quartz stringers, fine sulphides, heavy pyrite free gold at 447 feet |
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450-475 |
vein matter, well mineralized, quartz stringers, fine sulphides and disseminated pyrite |
| C-7 |
325-350 |
vein matter, sulphide dissemination, chalcopyrite (high-grade |
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1935 - shaft to 105 feet and 60 feet of drifting on the 100 foot level by Cheltonla-Swastika Mines Limited.
1947 - surface work by Todora Prospecting Syndicate.
1948 - Geological survey and four diamond drill holes (1,368 feet) by Macassa Mines Limited on claim 56734 and 39855, now claims 511329 and 511327; one of these holes re-drilled C-6 with negative results; assay results from the three holes did not return any significant gold or copper values.
M-l 518.9 feet
M-2 299 feet
M-3 550 feet
M-4 136 feet
1957 - one diamond drill hole (400 feet) by Wright-Hargreaves Mines Limited.
N-1 400' repeated 1930 Cheltonia #7 hole; values to 0.04 oz Au/ton over 7.7feet
1980 - magnetometer survey and four diamond drill holes by Noranda Exploration Co. Ltd.
1991 - three long trenches on claim 511329 by Arnold Allsopp.
1995 - I.P. survey (3.6 km), magnetometer survey and geological mapping (8.0 km) on claims 511330,511331 and 511578 by Arnold Allsopp.
Alteration And Mineralization
A 200 m wide east trending band of alteration extends from 4200 E to 5000 E consists of Fe-carbonate alteration with local silicification, pyritization and fuchsite (Robinson 1995) probably is related to the Eby-Otto fault zone (Compilation). Induced polarization chargeabiltty anomaly Nos. 1, lA, 3 and 5 are related to this alteration zone. A pit 15 m west of the Cheltonla Shaft was sunk on a 50 cm grey quartz vein with anomalous Au values (199 ppb) striking 080 degrees (Robinson 1995). An east trending 30 m wide hydrothermally altered strongly silicified zone with 3-5% disseminated pyrite and minor fuchsite with anomalous values in grab samples of 58 ppb Au (W. Benham, Battle Mountain) is exposed in trenches on claim 511329. The silica-rich, pyrite-bearing zone is similar in appearance to Battle Mountain (Canada) Inc. 's 102 Gold Zone on the Amalgamated Kirkland property just south of Kirkland Lake (Meyer 1991). In the Graphite Pit (molybdenite) on line 4800 E, TGS returned a value of 342 ppb Au over a width of 0.61 m. On line 4600 E, TGS returned values of 1850 ppb Au in a syenite dike (Robinson 1995).
Exploration Targets
The property is along the Eby-Otto Fault Zone, which is a splay fault off the Larder Lake break. Anomalous gold values are associated with quartz veins, silicification and disseminated pyrite over a strike length of 1.6 km. The targets for exploration are as follows: (Compilation Map in pocket)
- Eby-Otto Fault Zone: (Figures 2 & 4)
- 200 m wide alteration zone consisting of Fe-carb., silicification, pyritization, fuchsite alteration over a strike length of 1.6 km.
- I.P. chargeability anomalies: 1, lA, 3 & 5 in the above alteration zone.
- 30 m wide silicified zone with 3-5% diss. py, fuchsite; grab sample of 58 ppb Au; 8 km southwest of the Cyprus Zone (300,000 oz. Au) .900 Feet on trench Eby Twp
- Graphite Pit: TGS sample of 342 ppb Au over 0.61 m.
- Syenite Dike: TGS sample of 1851 ppb Au over 0.45m.
- Cheltonia Shaft Quartz Vein: 50 cm q.v. assaying 199 ppb Au in grab sample.
Recommended Exploration Program
An initial phase 1 exploration program on the exploration targets is recommended as follows:
Eby-Otto Fault Zone Target:
- 12 km of line cutting.
- 8 km I.P. survey.
- 6 km magnetometer and geological survey.
- fill-in I.P. survey on the central grid.
- extend grid to cover claims 511329, 511579 and 511580 to the east and west.
- channel sampling in trenches on claim 511329.
- diamond drilling of six holes totaling 600 to 1000 metres.
The budget for this program is being prepared.
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