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Ontario Geological Survey
Permanent Link to this Record:
MDI42E13SE00014
| Record Name(s) | Chemalloy Occurrence - 9999, Chemalloy - 1983, Mitto Showing - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1983-Feb-15 |
| Date Last Modified | 2022-May-27 |
| Created By | |
| Revised By |
Primary Commodities: Molybdenum
Secondary Commodities: Gold, Copper, Silver
Township or Area: Elmhirst
Latitude: 49° 49' 48.15" Longitude: -87° 42' 54"
UTM Zone: 16 Easting: 448577.936 Northing: 5519979.501 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E13SE
Point Location Description: Trenches and diamond-drill holes.
Location Method: Conversion from MDI
Access Description: The claim is located in northwestern Elmhirst Township. Travel north from Nezah (10.1 km west of Jellico) on secondary highway 801 for 19.6 km, then east on a lumber road for approximately 9.7 km.
1947: The claim covering the occurrence was staked by Isabel Garvey (cancelled 1949). 1957: Staked by Lucy Staunton, who transferred all interests to John S. Grant. 1958: A total of 190 days was credited to the claim for unspecified work, and the claim was later cancelled. 1970: Staked by Lucien Sylvain for A. Mitto, who discovered the molybdenum showing the following summer. 1971: All interest transferred to Chemalloy Minerals Ltd which performed manual and mechanical trenching, assaying and diamond-drilling (4 holes totalling 152.4 m). A geological survey was also conducted. 1980: After staking/restaking, interest transferred from Richard D. Middaugh to John E. Ternowsky, who optioned the claim to Falconbridge Nickel Mines Ltd. An IP survey was conducted. 1981: A grid was cut, and mag and EM surveys were conducted by Falconbridge. Two holes totalling 173.1 m were drilled. The option was later dropped. 1985: Claim was open.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.1237 | 42E13SE0024 | 42E13SE0024 |
| 2.722 | 42E13SE0048 | 42E13SE0048 |
Province: Superior
Geological Age: Archean
Dec 07, 2005 (B Nelson) - Elmhirst Twsp is underlain by the Elmhirst Lake and Coyle Lake Stocks. The Chemalloy Occurrence crops out in the northwestern contact of the Elmhirst Lake Stock and felsic to intermediate metavolcanics. The Chemalloy Occurrence is a stock work of discontinuous quartz veining hosted in granodiorite. Within the granodiorite mafic minerals have been altered to chlorite and plagioclase has been altered to sausserite. Mo occurs as films and plates, or may be represented by a blue-grey coloration within the quartz veins. Shearing and veining within the occurrence may be related to the Pinel Creek Lineament, a major northeast-trending structure. Py and minor cp occur disseminated in both the quartz veins and sheared granodiorite, particularly around the southeast end of the exposure where they constitute 1 to 5% of the vein material. No mineralization was observed in the massive granodiorite.
| Rock Type | Rank | Composition | Texture | Relationship | Porphyry-unsubdivided | 1 | Dacite | Porphyritic | Near |
|---|---|---|---|---|
| Granodiorite | 2 | Sheared | Host | |
| Vein | 3 | Quart | Contains | |
| Porphyry-unsubdivided | 4 | Andesite | Porphyritic | Near |
| Gabbro | 5 | Gabbro | Near |
Dec 07, 2005 (B Nelson) - The metavolcanics are dacite and andesites, commonly feldspar porphyritic. Intruding the metavolcanics is the Pinel Creek Intrusion which is leucocratic to melanocratic gabbro, hosting minor magnetite, pyrrhotite, chalcopyrite and pentlandite. The intrusion may be a portion of a larger diorite-quartz diorite body in the Crooked Green Lake area. The Pinel Creek Intrusion strikes 70 degrees, dips 50 degrees north and may be up to 185 m thick.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Molybdenite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Silicification | 1 |
Dec 07, 2005 (B Nelson) - A selected grab sample of the blue-grey quartz assayed 0.51% MoS2, 0.02 oz/ton Au and 0.36 oz/ton Ag. A grab sample of the sheared granodiorite was also analysed and found to contain 0.32% MoS2 and 0.01 oz/ton Au. A diamond-drilling program (4 holes, 152.1 m) conducted by Chemalloy Minerals Ltd yielded the following results: Holes 1, 2 and 4 intersected zones of shearing 6.1 m to 7.6 m wide. Cores from this zone from holes 1 and 2 assayed trace to 0.08% MoS2 and samples from the zone in hole 4 yielded values up to 0.2% MoS2 with an average grade of 0.1% MoS2 over 6.1 m. The 1981 drilling by Falconbridge was conducted in anticipation of intersecting more fractured and veined granodiorite suggestive of a porphyry molybdenum deposit. Drill logs state neither fractured granitic rocks nor good molybdenum values were encountered.
Dec 07, 2005 (B Nelson) - Within the granodiorite, mafic minerals have been altered to chlorite and plagioclase has been altered to sausserite.
Date: Dec 20, 1996
Geologist: B Nelson
Notes: The Beardmore-Geraldton Economic Geologist visited this occurrence August 7, 1981 and August 27, 1981.
Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts
Publication Number: M2102 Date: 1997
Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Elmhirst and Rickaby townships, Thunder Bay District
Publication Number: M2373 Scale: 1:31,680 Date: 1977
Author: Mackasey W.O., Wallace H.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of Elmhirst and Rickaby townships, District of Thunder Bay
Publication Number: R168 Date: 1978
Author: Mackasey W.O., Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Article - 1981 report of the Thunder Bay Resident Geologist
Publication Number: MP101.004 Date: 1997
Author: McIlwaine W.H., Fenwick K.G., Scott J.F., Mason J.K., Schnieders B.R., Kristjansson F.J., Speed A.A., Bourdages H.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Howland area, Haliburton, Peterborough and Victoria counties
Publication Number: OFR5639 Date: 1987
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
Location:
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
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