Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Permanent Link to this Record: MDI52F10NW00116

Deposit: MDI52F10NW00116

General

Mineral Deposit Identification
Deposit Name(s) Nabish Lake - 1956, Johnston-jeness - 1987
Related Deposit Type None
Deposit Status occurrence
Date Created 1987-Apr-10
Date Last Modified 2017-Nov-23
Created By Q Unknown
Revised By T Pettigrew

Commodities

Primary Commodities: nickel, copper

Secondary Commodities: platinum, palladium

Location

Township or Area: Contact Bay Area

Latitude: 49° 39' 11.73"    Longitude: -92° 55' 46.59"

UTM Zone: 15    Easting: 505081   Northing: 5500082    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F10NW

Point Location Description: Location of DDH 1 from AFRI 52F10NW0093

Location Method: conversion from mdi

Source Map: OGS 1941, MAP 50E DRYDEN-WABIGOON AREA IN AR VOL 50 PT

Sources Map Scale: 1:50 000

Access Description: The property is located about 10 miles southwest of Dryden and about 1.5 miles east of the south tip of Nabish Lake. (O.D.M. 1969, MRC 12, p.165)

Exploration and Mining History

1956: Discovered by W.A. Johnston and optioned to Preston East Dome Mines, Limited. Four d.d. holes totalling 959 feet (292.3 m) (dd #1 - claim 26922) drilled by Preston East Dome Mines. 1960: EM survey by Preston East Dome Mines Ltd. 1967: Agena Mining Company Ltd. conducted a ground EM geophysical survey. 2001: Atikwa Minerals Ltd. optioned the property and conducted geological mapping and sampling. 2009: SEDEX Mining Corp. conducted prospecting, soil sampling, and a VTEM survey.

Assessment Work on File

Assessment Work on File
Office File Number   Online Assessment File Identifier   Online Assessment File Directory  
Kenora AF 5210NW, V-2 Nabish Lake Property     Donated    
10     52F10NW0093     Open
63.2085     52F10NW0081     Open
2.21725     52F10NW2002     Open
2.41350     20000004126     Open

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean   

Geology Comments

11/23/2017 (T Pettigrew) - The showing is in a portion of the Nabish Lake Mafic Intrusive, one of several layered mafic intrusions (ca. 2732 Ma) lying along the periphery- of the Atikwa Batholith (ca. 2730 Ma). The Nabish Lake Intrusive is oriented north-south in long dimension, with a mushroom-shaped "cap" on the north, indicating the possibility of folding. The showing is located in this northern portion of the intrusive (AFRI 52F10NW2002).

Mineral Deposit Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
mafic intrusive 1 gabbro host
felsic intrusive 2 granite adjacent

Lithology Comments

03/25/2010 (J Bongfelt) - Sulphides are related to sharing in altered Early Precambrian gabbro, close to a gabbro-granite contact. (O.D.M. 1969, MRC 12, p.165)

11/23/2017 (T Pettigrew) - The mafic intrusive rocks consist of a sequence of massive to crudely layered mafic to ultramafic rocks underlie the claim, consisting of >1-2 m thick layers of quartz gabbro, gabbronorite, hornblende gabbro, anorthositic gabbro, and pyroxenite. Layering is generally not distinct: only locally can faint, discontinuous compositional layering on the order of centimeters be discerned. Where visible, strike of the layering is approximately 330° and dips are steep. There appears to be an east-to-west fractionation trend, from pyroxenite-gabbro-dominated couplets on the east to gabbro-anorthositic gabbro couplets on the west. Deformation is indicated by intrafolial folds of the layering; however, the details of this folding is unknown at this time. Dioritic to granodioritic rocks (of the Atikwa Batholith) form the eastern boundary of the mafic intrusive (AFRI 52F10NW2002).

Mineralization

Deposit Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Habit Description
1 pyrite economic ore
2 chalcopyrite economic ore
3 pyrrhotite economic ore

Mineralization Comments

03/25/2010 (J Bongfelt) - Two pits, 30 feet apart have exposed widths of 9 and 12 feet. A grab sample assayed 1.5% Cu and 0.3% Ni. (MNR - MDI Record re Kenora Historical File 52F10NW00116, Nabish Lake)

11/23/2017 (T Pettigrew) - Mineralization encountered is primarily disseminated sulfides, dominated by pyrite, but including lesser chalcopyrite and pyrrhotite. Sulfide concentrations are typically less than 1%, but locally attain 2-3%. Local zones of higher sulfide concentrations have been exposed in old pits, and consist of well-mineralized gabbros. Sulfides comprise up to 5-10% of the rock at these sites, and these mineralized zones range from <1 m to 3-5 m. Samples from the 2001 program showed weakly anomalous PGE concentrations at samples 627915, 627934, and 627936, with 116 ppb Pt+Pd, 121 Pt+Pd. and 74 ppb Pt+Pd, respectively. The highest nickel assays returned were 1100-1250 ppm Ni. The highest Cu assays returned were up to 3740 ppm Cu (0.374% Cu) (AFRI 52F10NW2002).

References

Publication - Copper, Nickel, Lead, and Zinc Deposits in Ontario, p. 20

Publication Number: MDC002    Date: 1957

Author: Thomson, J.E., Fergson, S.A., Johnston, W.G.Q., Pye, E.G., Savage, W.S.

Publisher Name: OGS


Publication - Copper, Nickel, Lead and Zinc Deposits of Ontario, p. 165

Publication Number: MDC012    Date: 1969

Author: Shklanka, R.

Publisher Name: OGS


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For detailed information regarding this mineral deposit please contact the Kenora Resident Geologist District Office