Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42C08SW00039

Record: MDI42C08SW00039

General

Mineral Record Identification
Record Name(s)	Breccia Zone - 1984, Bearpaw Group - 1984, Bxa Zone - 1983
Related Record Type	Simple
Related Record(s)
Record Status	Occurrence
Date Created	1991-Jan-08
Date Last Modified	2022-Sep-16
Created By
Revised By

Commodities

Primary Commodities: Gold

Location

Township or Area: Jacobson

Latitude: 48° 19' .42" Longitude: -84° 23' 52.18"

UTM Zone: 16 Easting: 692911.44 Northing: 5354782.99 UTM Datum: NAD83

Resident Geologist District: Sault Ste. Marie

NTS Grid: 42C08SW

Point Location Description: Centre of patented claim SSM 1814

Location Method: Data Compilation

Access Description: Access is via an 18 km all-weather gravel road that turns off of highway 519 just west of the town of Dubreuilville. Dubreuilville is on highway 519, 44 km east of the junction of Highway 17 and 519. From the junction of the old and new Goudreau Roads, drive east for approximately 4 km. A disused bush road intersects the old Goudreau Road on the north side. The Occurrence is located appoximately 2 km along this road.

Exploration History

1960's: Algoma Steel Corporation - trenching and sampling. 1977: Gulf Minerals - diamond drilling. 1983-84: Canamax Resources Incorporated - ground geophysical survey, mapping, channel sampling, 5 ddh (358 m). 2000: Patricia Mining Corp. - trenching, mapping, sampling, 1 ddh.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
FINAN 0044	42C08SW0058	42C08SW0058
WP Finan-66	42C08SW2014	42C08SW2014
WP Finan-67	42C08SW2018	42C08SW2018

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Michipicoten

Tectonic Assemblage: Wawa

Geological Age: Neoarchean Geochronological Age: 2750 MA Geochron. Age Ref.: GOO VOL 1

Metamorphism Type: Regional

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (A Wilson) - The deposit lies within the Western Domain of the Goudreau Lake Deformation Zone. The GLDZ is up to 4.5 km in width and strikes in a gentle sigmoid-form for at least 30 km, subparallel to the stratigraphy and the regional foliation. In the immediate Goudreau-Lochalsh area, the GLDZ is coincident with a major contact between Cycle 2 and Cycle 3 volcanics. There is a strong structural control of the gold-bearing quartz veins systms within each of the 070-075 striking high-strain zones within the deformation zone. The Western Domain has been studied in less detail than the other domains of the deformation zone. It appears to be similar to the eastern domain in terms of high-strain zone orientations and deformation style. The western domain is composed of 85 degree and 115 degree-striking brittle and brittle-ductile high-stain zones displaying dextral oblique-slip displacement. Lineations plunge moderately to the west. The Breccia Zone is hosted in the late NW-trending Maskinonge Lake Fault that has a sinistral offset of approximately 1 km.

Lithology

Lithology Data
Rock Type	Rank	Composition	Texture	Relationship
Mafic pillowed flow	1	Epidote-Altered	Sheared, Pillowed	Host
Vein	2		Stockwork	Host
Breccia-unsubdivided	3			Host

Lithology Comments

Dec 07, 2005 (A Wilson) - The Breccia zone is an asymmetrical, siliceous, mylonitized fault zone. The host rocks consist of calcite and epidote altered mafic metavolcanic rocks are intensely silicified and quartz-vein stockworked. In addition to the stockwork-breccia style of mineralization there is a 0.75 m wide massive quartz vein occupying the core of the fault. East of the mineralized fault the metavolcanic rocks are intruded by a number of quartz-feldspar porphyry dikes which are truncated by the fault. Mapping by Patricia Mining Corp. classified the host rock as a strongly silicified mafic/chloritic breccia containing 80% cryptocrystalline quartz with mafic fragments, carbonate veins and pyrite.

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking	Alteration Intensity	Alteration Style
1	Gold	Economic	Ore
1	Chalcopyrite	Economic	Gangue
2	Pyrite	Economic	Gangue
	Epidote	Alteration		Epidotization	1	Medium	Replacement
	Calcite	Alteration		Carbonatization	2	Medium	Replacement

Mineralization Comments

Dec 07, 2005 (A Wilson) - Gold is restricted to the siliceous cherty core of the shear zone. Fine pyrite and chalcopyrite range up to 2% of this core material. The chalcopyrite appears to correlate with the better gold assays. Channel samples returned values ranging from 7.10 g/t Au over 0.9 m to 12.10 g/t Au over 0.83 m to 0.01 g/t Au over 1 m. Visible gold was noted in drill hole 03-4. The gold appeared as a thin foil, plating a fracture within a thin quartz stringer in mafic metavolcanics. This section returned an assay of 0.69 g/t Au over 1 m. Narrow quartz veins in the fault breccia yielded 6.0 g/t Au over 1 m. Channel samples collected by Patricia Mining Corp. in 2000 returned values ranging from 0.01 g/t Au to 36.11 g/t Au.

Mineral Record Details

Classification
Rank	Classification
1	Replacement

Characteristics
Rank	Characteristic
3	Fault
1	Sheared
2	Stockwork

Mineral Zones - Size and Shape

Rank: 1 Structure Type: Fault

Rank: 2 Structure Type: Shear

Rank: 3 Structure Type: Vein

Zone Name: Detour Lake - Rank 1
Shape	Length	Thickness	Depth	Strike	Dip	Plunge	Trend	Age	Reference
Irregular		2		130	80

Site Visit Information

Date: Nov 01, 2000

Geologist: A Wilson

Notes: In addition to the stockwork-breccia style of mineralization there is a 0.75 m wide massive quartz vein occupying the coe of the fault. The mineralized portion of the Maskinonge Lake fault at the Breccia zone is narrower than at the Michael Syndicate Shaft Occurrence. The 130-135 degree strikeing, mineralized portion of the fault is only 1-2 m wide. The intensity of the silicification and the number of quartz veins both decrease gradationally away from the fault to the east and abruptly to the west.