Ontario Geological Survey
Permanent Link to this Record:
MDI52F03NW00007
| Record Name(s) | Johnston Vein - 1940 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-02 |
| Date Last Modified | 2022-Jul-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Bluffpoint Lake Area
Latitude: 49° 8' 33.87" Longitude: -93° 21' 49.92"
UTM Zone: 15 Easting: 473462.019 Northing: 5443387.62 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F03NW
Point Location Description: Transfer
Location Method: Conversion from MDI
Access Description: The property consists of 33 claims, numbers K824586 -K824605 incl., K824698 -824704 incl., K824706 -K82471 incl., on claim map Bluffpoint Lake, #G2669, in the Kenora Mining District. The property is accessible via the Cedar Narrows Road, a distance of 42 kilometres from its junction with Highway .502. The Cedar Narrows Road is maintained all year round by Boise Cascade, to service their pulp cutting operations. (Assessment File 52F/03 NW Q-1, Report on the Geological Survey, Peggy's Pond Project by J.A. Bolen; 1985, Kenora Resident Geologist Office)
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.8848 / 52F03NW Q-1 | 52F03NW0021 | 52F03NW0021 |
Province: Superior
Subprovince: Wabigoon
Terrane: Western Wabigoon
Belt: Eagle-Wabigoon-Manitou
Geological Age: Precambrian
Jul 07, 2022 (C Ravnaas) - All bedrock in the map area is Early Precambrian (Archean) in age. The southern boundary of the property lies 1 mile north of the east trending Manitou Stretch -Pipestone Lake Fault. Supracrustal rocks consist of interlayered, steeply dipping, tightly folded andesitic flows and pyroclastics with lesser amounts of mafic and felsic metavolcanics. The metavolcanics in the map area lie in a strong pinch zone between the Pipestone Lake Fault and the Lawrence Batholith. A widespread schistosity and shearing has been developed, most strongly along the axial trace of fold hinges. The composite Lawrence Lake Batholith consists mainly of altered biotite-hornblende diorite and quartz diorite, with a later quartz rich hornblende biotite trondhjemite. The batholith has intruded the the metavolcanics causing deformation and metasomitizing the contact rocks. Two Major shear zones (B&C) have been identified radiating from the Lawrence Lake Batholith, to intersect the sheared hinge line of the one identified fold axis found on the property.
Feb 19, 2010 (C Ravnaas) - Best assay: 0.03 opt Au from quartz vein. (1) Grab sample by G.R. Edwards, OGS Report #222, 1983, assayed .54 oz/ton Au. This showing is within the Lawrence Lake Batholith and is preseently part of the Fairservice Property which is under option to Falconbridge Copper Ltd. Drilling by Noranda, Selco and recently Falconbridge has indicated subeconomic grades. (2) Straw Lake Beach Mines- presently owned by Mindel Mines Ltd. A vein system in a shear in altered felsic volcanics, sericite schist. Production between 1940 and 1945 amounted to 11,568 oz Au and 1,040 oz Ag. from 33,662 tons of ore. The vein goes off the property to the north on to the Konigson Property beneath Straw lake. (3) Konigson Property -owned by A. J. Lustace. A metre wide shear zone in intermediate agglomerate. Limited work indicates 5,600 tons at .40 oz/ton Au. (4) Formerly the Johnston Claims, 1940 -45, which were staked to provide protection for the Konigson Showing. This showing is located 1,500 ft north of the Konigson Showing and consists of a quartz vein of 1' to 8' in width and a minimum of 300 feet in length. Grab samples in the late 1930's and 1940's from a blasted trench assayed up to .15 oz/ton Au. This vein lies on the' A' shear zone and except for a limited amount of trenching has not had any work done on it. Four grab samples # JAB 8.5-21, 22, 34 and 35 assayed .01, .03, .005 and Nil, respectively. Mapping of the Peggy's Pond Project has proven the existence of two major shear zones, 'B' and 'C'. originating in the Lawrence Lake Batholith that possibly could have been avenues for mineralization. Shear zone 'B' has not been sampled. On shear zone' C', although no samples were taken directly from the shear, samples on the periphery gave assays up to .01 oz/ton Au, indicating the presence of gold in the system. Both 'B' and 'C' shears zones intersect shear 'A' at nearly 90 degrees. The Johnston Vein is located on shear zone 'A' approximately 700 feet west of the intersection point of shears 'A' and 'C' beneath Straw Lake. Assays from .01 to 1.3 oz/ton Au have been collected along the length of shear zone 'A', clearly indicating a widespread distribution of gold in this zone. (Assessment File 52F/03 NW Q-1, Report on the Geological Survey, Peggy's Pond Project by J.A. Bolen; 1985, Kenora Resident Geologist Office)
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