Ontario Geological Survey
Permanent Link to this Record:
MDI42F04NE00017
| Record Name(s) | One Otter Lake East Zinc Occurrence - 1992, One Otter Lake East Area, Claim Groups 90-1 and 90-4 - 1990, Banana Lake Property, Claim Group 83-2 - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1996-Dec-19 |
| Date Last Modified | 2022-May-27 |
| Created By | |
| Revised By |
Primary Commodities: Zinc
Secondary Commodities: Garnet (Nonmetals)
Township or Area: Herbert
Latitude: 49° 13' 18.49" Longitude: -85° 31' 56.04"
UTM Zone: 16 Easting: 606876.87 Northing: 5453149.68 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42F04NE
Point Location Description: Stripped area
Location Method: Field Visit
Access Description: The One Otter Lake East zinc occurrence is located in Herbert Township approximately 24.5 km northeast of Manitouwadge and 3.75 km east of Fred Lake. The occurrence is accessible via motor vehicle followed by travel on foot.From Manitouwadge, proceed east and then northeasterly along the Camp 70 logging road for approximately 23 km to the Mooseskull road. Proceed east along the Mooseskull road for approximately 2.5 km to an unnamed, secondary logging road located just west of where the Mooseskull road bends sharply to the north. Proceed south along this unnamed road for approximately 100 m to a partially overgrown, tertiary logging road. Proceed east-northeasterly along this road for approximately 1.5 km to a washed-out crossing over a small creek. Several lines of a grid cut in 1991 are present in this area. Proceed east along this grid to the vicinity of the occurrence which is located at grid coordinates 38+25E and 4+90N. Zinc mineralization occurs in garnet-orthoamphibole-rich gneisses exposed in several stripped areas along the base of a steep, east-northeast-trending hill.
1967: Geological maping; J. F. Giguere (ODM). 1978: Regional lake sediment and water geochemical survey; GSC-MNR. Samples collected from lakes in the vicinity of the occurrence contained slightly anomalous amounts of Cu and Zn. 1984: Line cutting and ground geophysical surveys (HLEM, MAG); Noranda Minerals Inc. (Geco Division). 1989: Geological mapping; H. Williams and F. Breaks (OGS). Dighem airborne geophysical survey (EM, MAG, VLF-EM); Noranda Exploration Company, Limited and Noranda Minerals Inc. (Geco Division). 1991: Line cutting, ground geophysical surveys (MAG, VLF-EM), stripping, geological mapping and soil and lithogeochemical sampling; Noranda Minerals Inc. (Geco Division). Reconnaissance till sampling program; I.M. Kettles (GSC). Samples collected in the vicinity of the occurrence did not contain anomalous amounts of gold nor base metals. 1992: Diamond drilling (1 hole of unknown length); Noranda Minerals Inc. (Geco Division). Lithogeochemical sampling; D.B. McKay (OGS).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.7639 | 42F04NE0013 | 42F04NE0013 |
| 2.14620 | 42F05SE0001 | 42F05SE0001 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Manitouwadge-Hornepayne
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
Dec 07, 2005 (D McKay) - The occurrence is located within the Wawa subprovince and is underlain primarily by a complexly folded, narrow, northerly- trending, discontinuous belt of locally hydrothermally altered, mafic to felsic metavolcanic gneiss and schist, felsic paragneiss and rare silicate- and oxide-facies iron formation (Wolfson 1991). The hydrothermal alteration and subsequent metamorphism has resulted in the development of garnet-anthophyllite-cordierite-bearing assemblages. This thin belt of altered supracrustal rocks has been traced along strike to the south for approximately 3 km to the vicinity of Banana Lake. The supracrustal rocks are bounded on all sides by locally magnetic, moderately foliated, possibly synvolcanic, quartz-rich, tonalitic orthogneiss (Wolfson 1991; Zaleski and Peterson 1993). The supracrustal rocks have been intruded quasi-conformably and discordantly by granitic and pegmatitic lithologies and by north- and northwesterly-trending diabase dikes (Wolfson 1991). The supracrustal rocks in this area are moderately to locally strongly foliated. Mineral assemblages suggest these rocks have experienced upper amphibolite facies-grade regional metamorphism (Williams and Breaks 1989, 1990). A major antiformal structure occurs in the vicinity of the occurrence. The fold axis of this antiform trends easterly and plunges approximately 35 degrees to the east (Wolfson 1991). Peterson and Zaleski (1994) have tentatively correlated the hydrothermally altered rocks comprising the occurrence with the Geco horizon (Falconbridge zone), separated by an interpreted, sinistral shear zone.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Gt-Ay-Ct Hornfels | Banded, Shistose | Host |
|---|---|---|---|---|
| Amphibolite | 2 | Gneiss | Near | |
| Oxide Ironstone | 3 | Oxide-Facies If | Near |
Dec 07, 2005 (D McKay) - The altered mafic metavolcanic (?) rocks are typically semi-massive, locally sheared, coarse- to very coarse-grained, weakly to locally moderately magnetic (due to disseminated magnetite) and consist primarily of randomly oriented laths of blue-gray orthoamphibole, subhedral, porphyroblastic, purple garnet (up to 2.5 cm across), minor, medium-grained cordierite and variable amounts of quartz, muscovite, biotite and plagioclase. Although the relative abundance of garnet and orthoamphibole varies, the two minerals generally occur in subequal amounts. Local concentrations of garnet define mineralogical layers within several of the exposed areas. This layering may reflect original compositional heterogeneities in the unaltered, unmetamorphosed protolith to these rocks.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| Garnet | Alteration | Hydrothermal | 1 | ||||
| Cordierite | Alteration | Hydrothermal | 2 | ||||
| Anthophyllite | Alteration | Hydrothermal | 3 |
Dec 07, 2005 (D McKay) - Pyrite and chalcopyrite occur locally in trace amounts and generally constitute much less than 1% of the altered rock. Wolfson (1991, p.6) noted that the presence of trace amounts of gahnite within the anthophyllite-garnet-cordierite hornfels indicates the presence of zinc, possible due to the desulphidation of sphalerite during upper amphibolite facies metamorphism. Assay values of up to 0.83% Zn and 0.03% Cu are reported for garnet-anthophyllite-rich rocks collected in the vicinity of the occurrence (Wolfson 1991). Altered, amphibolitic boulders found elsewhere on the One Otter Lake East property returned assay values of up to 0.23% Zn (Wolfson 1991). A grab sample of rusty-weathering, coarse-grained, strongly foliated, locally magnetic, pyritic (<1%), garnet-anthophyllite schist collected from the occurrence in 1992 by D.B. McKay for the OGS returned assay results of trace Au, 124 ppm Cu, 212 ppm Zn, 512 ppm K2O and 1113 ppm Na2O.
Dec 07, 2005 (D McKay) - This occurrence is significant in that it is mineralogically and geochemically similar to hydrothermally altered rocks that stratigraphically underlie the volcanogenic base metal deposits in the Manitouwadge camp located approximately 24.5 km to the west. As a consequence, the area surrounding the occurrence is considered to have high potential to host VMS-type base metal mineralization. In this regard, it is significant to note that the Herbert Township zinc-copper-silver deposit (i.e., the Falconbridge Zone), and the Banana Lake garnet occurrence are located 4.2 and 2.1 km to the southwest, respectively. As postulated by Zaleski and Peterson (1993), the hydrothermally altered rocks exposed at the One Otter Lake East zinc occurrence may represent the faulted continuation of the footwall assemblage to the Herbert Township zinc-copper-silver occurrence. Alternatively, these rocks may have been magmatically rafted into their present location.
| Rank | Classification |
|---|---|
| 1 | Exhalative |
| 2 | Volcanogenic |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
Map - Granitehill Lake area, Thunder Bay and Algoma districts
Publication Number: M2219 Scale: 1:63,360 Date: 1972
Author: Giguere J.F.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3
Publication Number: OFR5906 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Geology of the Manitouwadge-Hornepayne area
Publication Number: OFM0142 Scale: 1:50,000 Date: 1990
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Geology of the Manitouwadge greenstone belt, Ontario
Publication Number: OF 2753 Scale: 1:25,000 Date: 1993
Author: Zaleski, E; Peterson, V L
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183964
MonoMap - Geology of the Granitehill Lake area, districts of Algoma and Thunder Bay
Publication Number: R095 Date: 1972
Author: Giguere J.F.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Map - Total field aeromagnetic map of the Manitouwadge greenstone belt
Publication Number: OF 2754 Scale: 1:25,000 Date: 1993
Author:
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183965
Article - Geological studies in the Manitouwadge-Hornpayne area
Publication Number: MP146.014 Page: 79-91 Date: 1997
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Shaded relief aeromagnetic map of the Manitouwadge greenstone belt
Publication Number: OF 2755 Scale: 1:25,000 Date: 1993
Author:
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183966
Article - Geological studies in the Manitouwadge-Hornepayne region
Publication Number: MP151.006 Date: 1997
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Publication - Structure and tectonics of the Manitouwadge greenstone belt and Wawa-Quetico subprovince boundary, Superior Province, northwestern Ontario; Geological Survey of Canada, Current Research no. 1994-C
Publication Number: Cur Res 1994-C Page: 237-247 Date: 1994
Author: Peterson, V L; Zaleski, E
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/193831
Book - AF 2.14620
Publication Number: 2.14620 Date: 1991
Author: Wolfson. I.
Publisher Name:
Location: Thunder Bay RGP
Publication - Geological, geochemical, and age constraints on base metal mineralization in the Manitouwadge greenstone belt, northwest Ontario; Geological Survey of Canada, Current Research no. 1994-C
Publication Number: 94-C1b Page: 225-235 Date: 1994
Author: Zaleski, E; Peterson, V L; van Breemen, O
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/193830
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