Ontario Geological Survey
Permanent Link to this Record:
MDI000000000168
| Record Name(s) | McCullagh Creek KAF-87-18 - 1987 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2006-Nov-10 |
| Date Last Modified | 2022-Jun-09 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: McCullagh
Latitude: 51° 31' 25.8" Longitude: -89° 56' 52.81"
UTM Zone: 16 Easting: 295498 Northing: 5712200 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52P12SW
Point Location Description: DDH database.
Location Method: Data Compilation
1985-1989: An exploration program consisting of airborne geophysics, ground geophysics, and diamond drilling was carried out on a claim group in the vicinity of this occurrence by Kerr Addison Mines and Minnova.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 28 | 52P12SW0021 | 52P12SW0021 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Pickle Lake
Geological Age: Neoarchean
Nov 10, 2006 (Mark Puumala) - The McCullaugh Creek gold occurrence is located in the northeastern portion of the Pickle Lake Greenstone Belt within a northeast-striking sequence of supracrustal rocks defined by Stott (1996) as the Woman Assemblage. This assemblage has subsequently been re-named the Kaminiskag Assemblage (Young 2003). Rocks of the Kaminiskag Assemblage are bounded to the southeast by granitic rocks of the Second Loon Pluton and to the northwest by metavolcanic rocks of the Confederation Assemblage (Young 2003). The area surrounding this occurrence has limited outcrop exposure. As a result, much of the information regarding lithologies has been collected from diamond drill logs (Stott 1996). Rocks of the Kaminiskag assemblage are dominated by mafic metavolcanic flows, with thinner layers of felsic to intermediate metavolcanic ash flows. Minor amounts of banded iron formation have been reported in the mafic metavolcanics, and fine-grained clastic metasediments have been documented in diamond drill core sections inter-bedded within the felsic to intermediate volcanics. The mafic metavolcanics are generally strongly-foliated massive amphibolites, although minor amounts of ultramafic material have also been reported (Stott 1996). The main felsic to intermediate volcanic unit is a quartz-phyric dacite tuff that can be traced over a strike length of 8 km. This unit locally contains thin, massive sulphide lenses that are dominated by pyrrhotite and are overlain by chert (Stott 1996). Stott (1996) indicates that the results of a U-Pb zircon age determination from this unit provided an age of approximately 2836 Ma. Rocks in the area of the McCullagh Creek occurrence generally exhibit north-dipping schistosity and northwest-plunging mineral lineations that conform to the igneous fabrics of the nearby Second Loon pluton. This pluton is interpreted by Stott (1996) to have imposed a contact strain aureole and amphibolite facies metamorphism within the relatively thin greenstone belt tail that is present at the northeast end of the Pickle Lake Greenstone Belt. Diamond drill hole logs from the area of this occurrence indicate the presence of a northeast-striking fault that parallels McCullagh Creek. The fault zone is several metres wide and borehole logs indicate that it is characterized by shearing, graphitic and chloritic bands, brecciation, disseminated sulphides and quartz-carbonate veining. Drill hole logs also commonly indicate the presence of small-scale folds.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Contains |
|---|---|---|---|---|
| Ironstone-unsubdivided | 2 | Near | ||
| Intermediate lava flow-unsubdivided | 3 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| Graphite | Alteration | Graphitic | 1 |
Nov 10, 2006 (Mark Puumala) - Information provided on the Kerr Addison Mines diamond drill hole log (AFRI52P12SW0021) for the McCullagh Creek gold occurrence indicates that it is hosted within mafic metavolcanic rock. No specific information regarding the characteristics of the rock from which the anomalous assay was obtained is provided. However, the drill hole log does indicate the presence of a fault zone approximately 12 feet above the section from which the anomalous gold assay was obtained. The fault zone is reported to cover a core length of 21 feet and contains graphite schist, pyrite stringers, fault breccia, calcite and an unidentified waxy green mineral. The highest reported assay from this borehole was 1500 ppb Au over a core length of 0.45 feet.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Fault |
Map - Geological series, Precambrian geology, Pickle Lake area, eastern part
Publication Number: P3057 Scale: 1:50,000 Date: 1989
Author: Stott G.M., Brown G.H., Coleman V.J., Green G.M., Reilly B.A.
Publisher Name: Ontario Geological Survey
Location:
Mono - The Geology and Tectonic History of the Central Uchi Subprovince
Publication Number: OFR5952 Date: 1996
Author: Stott G.M.
Publisher Name: Ontario Geological Survey
Location:
Thesis - New Structural, Geochronological, and Geochemical Constraints on the Tectonic Assembly of the Archean Pickle Lake Greenstone Belt, Uchi Subprovince, Western Superior Province
Publication Number: MSc Thesis Date: 2003
Author: Young, M.D.
Publisher Name: Queen's University
Location: Thunder Bay RGP
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office