Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Permanent Link to this Record: MDI000000000283

Deposit: MDI000000000283

General

Mineral Deposit Identification
Deposit Name(s) Apple Island Zone - 1991, East Bay Property - Apple Island - 1991
Deposit Status occurrence
Date Created 2007-Mar-29
Date Last Modified 2019-Sep-26
Created By M A Puumala
Revised By T Pettigrew

Commodities

Primary Commodities: gold

Location

Township or Area: McVicar Lake Area

Latitude: 51° 34' 19.41"    Longitude: -91° 25' 50.6"

UTM Zone: 15    Easting: 608753   Northing: 5714610    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O11SW

Point Location Description: Assessment file map (McKay 2004).

Location Method: data compilation

Access Description: Accessible year round via fixed-wing aircraft or helicopter from the town of Pickle Lake. A winter road from Pickle Lake to the First Nation community of Cat Lake is situated approximately 3 km south of the property. A backhoe trail leads from the winter road to the eastern portion of the property.

Exploration and Mining History

1991: BHP Minerals carried out mapping, trenching, and sampling. 1992: BHP Minerals Canada Ltd. drilled 4 DDH totalling 273.2 m. 2016-17: Reliant Gold Corp. carried out prospecting and sampling.

Assessment Work on File

Assessment Work on File
Office File Number   Online Assessment File Identifier   Online Assessment File Directory  
OM92-008     52O11SW0006     Open
OM91-026     52O11SW0015     Open Open
52O11SW0002     20000004964     Open
2.58450     20000015742     Open
2.57366     20000013886     Open

Geology

Province: Superior

Subprovince: Uchi

Belt: Lang Lake

Geological Age: Neoarchean   

Tectonic Assemblage: Confederation

Structure
Structure Name Scale Strike Dip Trend Plunge
Altered Zone Fault regional 290 45

Geology Comments

03/29/2007 (M A Puumala) - The area geology is described in MDI52O11SW00007.

Mineral Deposit Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
gabbro 1 sheared and altered contains
mafic metavolcanics 2 sheared and altered adjacent

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 gold economic ore
3 sphalerite economic ore
carbonate alteration carbonatization 1 strong disseminated
fuchsite alteration sericitization 2 strong replacement
sericite alteration potassic 3 strong disseminated
silica alteration silicification 4 medium replacement

Mineralization Comments

03/29/2007 (M A Puumala) - The Apple Island Occurrence is located within the Altered Zone Fault deformation zone. The Altered Zone Fault is described by Allen (1986) as a generally WNW-ESE-striking, relatively shallow dipping (<50 degrees to the NE) structure characterized by intense alteration and brittle-ductile deformation. Alteration minerals in this deformation zone include sericite, carbonate, chlorite and silica (including quartz veins and silica flooding). In addition, Bonner (1991) indicates the presence of apple green mica in sheared mafic material. Allen (1986) also indicates that a hydrothermal carbonate breccia commonly envelops the deformation zone. The surface expression of the Altered Zone Fault in the Apple Island area is reported by Bonner (1991b) to be located at the contact between basalt to the north and gabbro to the south. The deformation zone on Apple Island is reported to be characterized by intense shearing, alteration and brecciation, with apple green mica and quartz veining. The areas at the margin of the deformation zone in both lithologies are reported by Bonner (1991) to show little evidence of alteration, but are cross-cut by carbonate-filled fractures that are up to 10 cm wide. Channel sampling of a single outcrop of intensely shered and altered gabbro on Apple Island is reported by Bonner to have produced assay values of up to 785 ppb Au over 1 m. A grab sample assay of 725 ppb Au was also reported by Bonner (1991; Assessment report 52O11SW0015) from a sample of sheared and brecciated gabbro collected nearby on the south shore of McVicar Lake.

09/26/2019 (T Pettigrew) - DDH ML-92-72 assayed up to 0.72 ppm Au over 1.4 m and 2.3 ppm Au over 1.3 m. DDH ML-92-74 assayed 0.56 ppm Au over 1.5 m and 2.3 ppm Au over 1.2 m (Assessment report 52O11SW0006). Highlights of results from surface rock sampling at the Apple Island Zone reported gold assays averaging 0.95 g/t Au over 1.5 metres from three contiguous 0.5 metre chip samples taken across the strike of the zone in samples ML-17-06, 07 and 08 with an adjacent grab sample containing visible gold returning an assay of 9.2 g/t Au (Assessment report 20000015742).

Mineral Deposit Details

Deposit Classification
Rank Classification            
1 lode (gold)
Deposit Characteristics
Rank Characteristic            
1 sheared

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Ministry Contact Information

For detailed information regarding this mineral deposit please contact the Thunder Bay North Resident Geologist District Office