Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000000505

Record: MDI000000000505

General

Mineral Record Identification
Record Name(s)	DDH Fo88-9 - 1988
Related Record Type
Related Record(s)
Record Status	Occurrence
Date Created	2008-Mar-13
Date Last Modified	2022-Jun-07
Created By
Revised By

Commodities

Primary Commodities: Gold

Location

Township or Area: Forester Lake Area

Latitude: 52° 28' 44.62" Longitude: -90° 1' 10.1"

UTM Zone: 15 Easting: 702399.997 Northing: 5818499.999 UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 53B08NE

Point Location Description: ddh database and assessment file map (Hall 1988).

Location Method: Data Compilation

Exploration History

1987-88: Geological and geophysical surveys and diamond drilling by Esso Minerals of Canada.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
2.12011	53B08NE0001	53B08NE0001

Geology

Province: Superior

Subprovince: Berens River

Terrane: North Caribou

Domain: North Caribou Core

Belt: North Caribou

Geological Age: Mesoarchean

Lithology

Lithology Data
Rock Type	Rank	Composition	Texture	Relationship
Schist-Unsubdivided	1	Tremolite Schist		Contains
Intermediate Tuff	2	Tuff		Near
Sandstone	3	Greywacke		Near
Porphyry-unsubdivided	4			Near
Gabbro	5			Near
Ultramafic lava flow-unsubdivided	6		Epiclastic	Near
Mafic lava flow-unsubdivided	7			Near

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking
1	Chalcopyrite	Economic	Ore
	Carbonate	Alteration		Carbonatization	1
	Biotite	Alteration		Biotitic	2

Mineralization Comments

Mar 13, 2008 (Mark Puumala) - Esso Minerals Canada diamond drill hole FO88-9 was reported by Hall (1988) to have encountered anomalous gold mineralization (833 ppb over 1.34 m) in intensely deformed, carbonatized and biotitized tremolite schist containing 3 mm quartz-carbonate veinlets mineralized with rare chalcopyrite. The host tremolite schist is part of an ultramafic intrusion that was intersected near the top of the drill hole. Tuffaceous felsic and intermediate metavolcanics (with intercalated greywacke horizons) were the dominant lithologies reported in the lower (northern) portions of the drill hole. Other lithologies noted in the drill hole included quartz-feldspar porphyry and gabbro intrusions (Hall 1988). This occurrence is located immediately south of a northwest-striking ultramafic epiclastic horizon (Hall 1987 and 1988) that hosts the nearby Fred's Zone occurrence (MDI53B08NE00009).

Mineral Record Details

Classification
Rank	Classification
1	Lode (Gold)

Characteristics
Rank	Characteristic
1	Sheared

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Ministry Contact Information

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