Ontario Geological Survey
Permanent Link to this Record:
MDI000000001895
| Record Name(s) | Cadi No. 3 and 4 - 1984, Molson Lake North - 1984, J-6 Property - 1984 |
|---|---|
| Related Record Type | |
| Record Status | Discretionary Occurrence |
| Date Created | 2016-Jan-28 |
| Date Last Modified | 2021-Dec-06 |
| Created By | Therese Pettigrew |
| Revised By | Therese Pettigrew |
Primary Commodities: Molybdenum
Secondary Commodities: Tungsten
Township or Area: Bomby
Latitude: 48° 40' 16.81" Longitude: -85° 52' 24.56"
UTM Zone: 16 Easting: 582936 Northing: 5391533 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C12NW
Point Location Description: M2614
Location Method: Data Compilation
1981: Lac Minerals Ltd. conducted airborne mag, EM and radiometric geophysicsl surveys, geological mapping and soil sampling. 1983: Lac Minerals Ltd. conducted geochemical soil sampling as well as IP, VLF and ground mag geophysical surveys. 1984: Lac Minerals Ltd. drilled 4 DDH totaling 1218 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 42C12NW0062 | 42C12NW0183 | 42C12NW0183 |
| 42C12NW0053 | 42C12NW0080 | 42C12NW0080 |
| 42C12NW0028 | 42C12NW0040 | 42C12NW0040 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Skarn | 1 | Carbonate-Diopside Skarn | Host |
|---|---|---|---|---|
| Mafic Tuff | 1 | Mafic Tuff To Lapilli Tuff | Host | |
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent |
Jan 29, 2019 (Therese Pettigrew) - A carbonate-diopside unit divides the northern tuffaceous units from a broad band of sedimentary rocks to the south. The carbonate-diopside rock is comprised of 60-70% diopside, 20-25% calcite and 15-20% grossular garnet. Feldspar, quartz, tourmaline, epidote and a bright green mineral tentatively identified as apatite comprise 5% of the rock. The rock has the appearance of a calcsilicate skarn. The presence of either minor barite or scheelite in the matrix gives this rock a relatively high specific gravity in comparison to the volcanic rocks. The width and composition of the unit vary along strike. The average thickness is 10 m and composition ranges from silica-rich to carbonate-rich. Disseminated, irregularly distributed molybdenite comprises up to 2% of the carbonate-rich areas (AFRI 42C12NW0040). In trenches J6-TR1 and J6=TR2, there are four major lithological units exposed in trenches J6-TR1 and J6-TR2. The basal sequence consists of relatively undeformed and poorly mineralized lithic wackes and pelites. Overlying these sedimentary rocks is a thick sequence of tuffaceous intermediate volcanic rocks exhibiting increased shearing and sulfide content near the top of the unit. Chlorite-actinolite and sericite-muscovite-rich schistose rocks overlie the volcanics. This sequence is commonly folded and crenulated. Sulfide mineralization is pervasive. Carbonate-diopside-rich rocks are the last major lithological unit exposed although felsic and intermediate tuffaceous volcanic rocks have been uncovered in the northeast corner of trench J6-TJ1. A carbonate-diopside unit divides the northern tuffaceous units from a broad band of sedimentary rocks to the south. The carbonate-diopside rock is comprised of 60-70% diopside, 20-25% calcite and 15-20% grossular garnet. Feldspar, quartz, tourmaline, epidote and a bright green mineral tentatively identified as apatite comprise 5% of the rock. The rock has the appearance of a calcsilicate skarn. The presence of either minor barite or scheelite in the matrix gives this rock a relatively high specific gravity in comparison to the volcanic rocks. The width and composition of the unit vary along strike. The average thickness is 10 m and composition ranges from silica-rich to carbonate-rich. Disseminated, irregularly distributed molybdenite comprises up to 2% of the carbonate-rich areas (AFRI 42C12NW0040).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 6 | Tourmaline | Economic And Alteration | Gangue | Tourmalinization | 2 | Unknown | Disseminated |
| 1 | Molybdenite | Economic | Ore | ||||
| 1 | Diopside | Economic | Gangue | ||||
| 2 | Calcite | Economic | Gangue | ||||
| 3 | Garnet | Economic | Gangue | ||||
| 4 | Feldspar | Economic | Gangue | ||||
| 5 | Quartz | Economic | Gangue | ||||
| 7 | Epidote | Economic | Gangue | ||||
| 8 | Barite | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | Unknown | Disseminated | ||
| Chlorite | Alteration | Chloritic | 3 | Unknown | Disseminated |
Jan 29, 2019 (Therese Pettigrew) - Muir (2000) describes the Cadi No. 3 and 4 showings as up to 2% disseminated blebby moly. No assays. Muir (2000) describes the Cadi No. 5 and 6 showings as up to 3% molybdenum and 5% pyrite with variable amounts of barite, scheelite and hematite.
Map - Geological Compilation of the Eastern Half of the Schreiber-Hemlo Greenstone Belt
Publication Number: M2614 Scale: 1:50,000 Date: 2000
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
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