Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42L06SW00007

Record: MDI42L06SW00007

General

Mineral Record Identification
Record Name(s) King-Dodds Occurrence - 1915, Howard Falls Occurrence - 1915, King-Dodds - 1991, Howard Falls - 1991
Related Record Type Simple
Related Record(s)
Record Status Discretionary Occurrence
Date Created 1991-Jan-23
Date Last Modified 2022-May-30
Created By
Revised By

Commodities

Primary Commodities: Gold



Location

Township or Area: Sollas Lake Area

Latitude: 50° 21' 49.63"    Longitude: -87° 18' 43.58"

UTM Zone: 16    Easting: 477801.603   Northing: 5579126.036    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42L06SW

Point Location Description: Shaft

Location Method: Conversion from MDI

Access Description: The occurrence is located in the Kowkash area. Drive north from Geraldton on Highway 584 to Highway 643. Continue on 643 to the Ogoki Road. Canoe south on Kawashkagama (Kowkash) River from the bridge at Ogoki Road to the first major bend in the river downstream from the island below Howard Falls. Proceed on foot approximately 300 m north to the occurrence.



Exploration History

1915: A high grade narrow quartz vein was discovered hosted in mafic metavolcanics. Claim KK2424 was staked. A staking rush was initiated. Stripping and trenching were conducted. 1916: A shaft was sunk to 17.1 m. 1983: D. Thorsteinson and N. Cox staked the occurrence. 1984: D. Thorsteinson, N. Cox and P. Lassila formed a private company, T.C.L. Incorporated. D. Thorsteinson officially holds claims TB815023-28 covering the occurrence.


Assessment Work on File

Assessment Work on File
Office File Number Online Assessment File Identifier Online Assessment File Directory
2.10401 42L06SW8228 42L06SW8228

Geology

Province: Superior

Geological Age: Archean  



Geology Comments

Dec 07, 2005 (B Nelson) - The Howard Falls area is underlain by massive and pillowed mafic metavolcanics. Minor quartz porphyries occur. Regional foliation strikes approximately 075 degrees and dips to the south. Gold is hosted in a quartz vein 10 cm wide and 4.26 m long. Beyond that, mineralization continued but there is no quartz at one end of the vein, and at the other it dips under a swamp. The vein strikes 10 degrees south of east and dips 75 degrees to the north, thus conforming in strike and dip with the country rock. The wall rock is pillow lava (meta-basalt) altered in places to schist. Numerous quartz porphyry dykes, up to 9.1 m wide, occur on the claim. The vein has been traced 30 m on the surface. The quartz is white, somewhat glassy in appearance and largely free from sulphides. An abundance of free gold occurred for 1.2-1.5 m along the vein on the surface next to the hanging wall. Lying along the north side of the quartz is a rusty schist band 15 cm wide and heavily impregnated with iron pyrite. The quartz vein is a crack-seal type with sericite-chlorite seams representing former portions of the wall rock. Pyrite and spectacular free gold are present in the quartz. Small quartz porphyry intrusions occur south of the occurrence.




Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Mafic pillowed flow 1 Basalt Pillowed Near
Vein 2 Quartz Contains
Quartz Porphyry 3 Host
Schist-Unsubdivided 4 Near

Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1GoldEconomicOre
2PyriteEconomicOre
1QuartzEconomicGangue
QuartzAlterationSilicification1

Mineralization Comments

Dec 07, 2005 (B Nelson) - Pyrite and spectacular free gold are present in the quartz vein. A shaft was sunk on the vein to 9.0 m and spectacular free gold was reported at the bottom. Some small scale hand cobbing took place, but no official production is noted.



Alteration Comments

Dec 07, 2005 (B Nelson) - The wall rock is pillow lava (meta-basalt) altered in places to schist.




Mineral Record Details

References

Map - Lake Nipigon, Thunder Bay District, Ontario

Publication Number: Map 8A Scale: 1:253,440    Date: 1910

Author: Dickison, A

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/107994


Mono - Gold occurrences, prospects, and deposits of the Beardmore-Geraldton area, districts of Thunder Bay and Cochrane

Publication Number: OFR5630 Date: 1986

Author: Mason J.K., White G.D.

Publisher Name: Ontario Geological Survey

Location:


Folio - Deeds Lake area, District of Thunder Bay

Publication Number: GDIF021 Date: 1997

Author: Thunder Bay RGO

Publisher Name: Ontario Geological Survey

Location:


File - Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP


Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.


Terms of Use

Please review our Terms of Use agreement for this data product.


Ministry Contact Information

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