Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Permanent Link to this Record: MDI000000002344

Deposit: MDI000000002344

General

Mineral Deposit Identification
Deposit Name(s) Longrose West - 1947, Undersill Property - 1988
Deposit Status occurrence
Date Created 2019-Sep-30
Date Last Modified 2020-Jul-15
Created By T Pettigrew
Revised By T Pettigrew

Commodities

Primary Commodities: gold

Location

Township or Area: Eva

Latitude: 49° 36' 48.97"    Longitude: -88° 4' 44.85"

UTM Zone: 16    Easting: 422045   Northing: 5496230    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52H09SE

Point Location Description: DDH UND-1 from Assessment report 52H09SE0002

Location Method: data compilation

Exploration and Mining History

1947: Longrose Gold Mines Ltd. drilled 18 DDH totaling 1991.75 m. 1988: Mingold Resources Inc. carried out VLF-EM and magnetic surveys, till and rock sampling, geological mapping, and drilled 6 DDH totaling 655.9 m.

Assessment Work on File

Assessment Work on File
Office File Number   Online Assessment File Identifier   Online Assessment File Directory  
10     52H09SE0013     Open
2.12313     52H09SE0002     Open
13     52H09SE0004     Open

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Beardmore-geraldton

Geological Age: Archean   

Mineral Deposit Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
metasedimentary 1 greywacke host
ironstone 2 adjacent
vein 3 quartz host
mafic metavolcanics 4

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 arsenopyrite economic ore
3 magnetite economic ore
1 quartz economic gangue
2 sericite economic gangue
3 chlorite economic gangue

Mineralization Comments

09/30/2019 (T Pettigrew) - A grab sample from near DDH UND-1 returned 3.029 ppm Au and 1.918 ppm As (Assessment report 52H09SE0002). DDH UND-1 assayed 2.596 g/t Au over 0.7 ft from a quartz vein containing pyrite, 0.724 g/t over 1.5 ft from 50% quartz veining and 50% very fine-grained host (possibly diabase), and 0.908 g/t Au over 3.6 ft from a brecciated quartz vein containing 1-2% pyrite and magnetite-rich inclusions. DDH UND-3 assayed 1.125 ppm Au over 2.5 ft from a sericite-chlorite shear containing 10% quartz veining with pyrite (Assessment report 52H09SE0004).

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Ministry Contact Information

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