Ontario Geological Survey
Permanent Link to this Record:
MDI42D14NW00055
| Record Name(s) | Trail Copper - 1981 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1997-Feb-13 |
| Date Last Modified | 2022-May-06 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc
Township or Area: Pays Plat Lake Area
Latitude: 48° 58' 40.01" Longitude: -87° 23' 4.11"
UTM Zone: 16 Easting: 471866 Northing: 5425057 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D14NW
Point Location Description: Channel sample location from Assessment file 20000008045
Location Method: Data Compilation
Access Description: The occurrence is located approximately 25 km north of Schreiber and 145 km northeast of Thunder Bay, Ontario. Access to the occurrence is by a 22 km gravel road to the Winston Lake Mine site. The Winston Lake trail is then travelled for approximately 0.5 km to the showing.
1981: Area mapped and sampled by Corporation Falconbridge Copper. The occurrence was likely discovered during the mapping program. 1982: The area was diamond drilled by Corporation Falconbridge Copper. 2008-10: Orebot conducted soil sampling, mapping, and ground-checking geophysical conductors. 2012: Silvore Fox Minerals Corp. carried out a VTEM survey, prospecting and sampling. 2014: Golden Share carried out mapping and prospecting. 2016: Ophiolite Consultants carried out soil and rock sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.57704 | 20000013841 | 20000013841 |
| 17 | 42D14NW0039 | 42D14NW0039 |
| 2.5926 | 42D14NW0022 | 42D14NW0022 |
| 2.53291 | 20000007489 | 20000007489 |
| 2.53573 | 20000007517 | 20000007517 |
| 2.45096 | 20000006157 | 20000006157 |
| 2.54796 | 20000008045 | 20000008045 |
| 2.3158 | 42D14NW0038 | 42D14NW0038 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The occurrence is classed as a VMS deposit. The area is underlain by altered and unaltered mafic metavolcanic rocks as well as minor interflow metasedimentary rocks. Severin and Balint (1984) describe the Trail Copper showing as follows: A thin sequence of bedded felsic sediments occurs locally between the base of the 'Ladder Flow' and the underlying quartz feldspar porphyry. In this case, this material is intensely altered to a QUARTZ CORDIERITE BIOTITE ANTHOPHYLLITE GARNET+/ sillimanite assemblage. The primary bedded nature of the material appears preserved. Anomalous sulphide content is common. The 0.15 m thick chalcopyrite mineralized siliceous horizon carries 6230 ppm Cu. The Trail Copper occurrence represents a thin exhalative unit between a mafic metavolcanic flow and the underlying quartz porphyry. The material is siliceous to cherty in nature.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Flow | Near |
|---|---|---|---|---|
| Quartz-Feldspar Porphyry | 2 | Q-Feldspar Porphyry | Near | |
| Chert | 3 | Siliceous Exhalative | Host | |
| Schist-Unsubdivided | 4 | Biotite-Garnet Schist |
Dec 07, 2005 (B Nelson) - The 'thin exhalative' host unit is siliceous to cherty in nature.
May 17, 2019 (Therese Pettigrew) - A biotite-garnet schist has been observed around Trail showing. This light to dark gray rock contains mm-scale rusty bands and is highly weathered. The mineralization is composed of 3-5% disseminated to veinlets of pyrite (Assessment file 20000008045).
| 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 | Sphalerite | Economic | Ore | ||||
| 4 | Gahnite | Economic | Gangue | ||||
| Quartz | Alteration | Hydrothermal | 1 | Unknown | Disseminated | ||
| Cordierite | Alteration | Hydrothermal | 2 | Unknown | Disseminated | ||
| Biotite | Alteration | Hydrothermal | 3 | Unknown | Disseminated | ||
| Anthophyllite | Alteration | Hydrothermal | 4 | Unknown | Disseminated | ||
| Garnet | Alteration | Hydrothermal | 5 | Unknown | Disseminated | ||
| Sillimanite | Alteration | Hydrothermal | 6 | Unknown | Disseminated |
Dec 07, 2005 (B Nelson) - Analyses by Severin and Balint (1984) assayed 6230 ppm Cu.
May 17, 2019 (Therese Pettigrew) - The Trail occurrence is classed as a VMS deposit. The area is underlain by altered and unaltered mafic metavolcanic rocks as well as minor interflow metasedimentary rocks. Severin and Balint (1984) describe the Trail occurrence as follows: a thin sequence of bedded felsic sediments occurs locally between the base of the Ladder Flow and the underlying quartz feldspar porphyry. In this case, this material is intensely altered to a quartz-cordierite-biotite-anthophyllite-garnet±sillimanite assemblage. The primary bedded nature of the material appears preserved. Anomalous sulphide content is common. The 0.15 m thick chalcopyrite mineralized siliceous horizon carries (up to) 6,230 ppm Cu. The Trail Copper occurrence represents a thin exhalative unit between a mafic metavolcanic flow and the underlying quartz porphyry. The material is siliceous to cherty in nature. Ophiolite Consultants collected a soil sample that returned an assay of 455 ppm Cu from the area of the showing (Assessment file 20000013841). The Trail Showing appears to correspond with Silvore Fox’s C15 anomaly. Sample 27530, collected by Silvore Fox Minerals in 2012, assayed 20,800 ppm Cu and 19,100 ppm Zn (Assessment file 20000007517). Over 100 meters along the trail, several outcrops exhibit a light to dark grey rock with reddish patina. Locally, this rock is slightly to strongly oxidized and hematized and chloritized. This sulphide-rich (Py, Cp, Sp) rock composed of biotite-quartz-feldspar-garnet is generally massive to locally foliated and is cut by several mm to cm boudinaged quartz veins parallel to foliation. To the North, foliation varies from 320° to 290° with a dip comprise between 50° and 70°. A channel sample assayed 2560 ppm Cu and 5750 ppm Zn (Assessment report 20000008045).
Dec 07, 2005 (B Nelson) - A thin sequence of bedded felsic sediments occurs locally between the base of the 'Ladder Flow' and the underlying quartz feldspar porphyry. In this case, this material is intensely altered to a QUARTZ CORDIERITE BIOTITE ANTHOPHYLLITE GARNET+/ sillimanite assemblage.
| Rank | Classification |
|---|---|
| 1 | VMS Base Metal |
Date: Feb 13, 1997
Geologist: B Nelson
Notes: Resident Geologist personnel visited the occurrence June 21, 1983; October 2, 1984; June 4, 1986; June 14, 1989; and August of 1994.
Book - The Geological Setting of the Winston Lake Massive Sulphide Deposit, p. 58-73
Publication Number: OF 2164 Date: 1984
Author: Severin, P.W.A., Balint, F., Sim, R.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/132350
Map - Big Duck Lake area, District of Thunder Bay
Publication Number: M2023 Scale: 1:15,840 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Page: 232-233 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Thunder Bay office
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Mono - Winston Lake and Manitouwadge Revisted: Modern Views of Two Volcanogenic Massive Sulphide (VMS)-Endowed Greenstone Belts. A Field Trip Guidebook
Publication Number: OFR6282 Page: 15-16 Date: 2012
Author: Lodge R.W.D.
Publisher Name: Ontario Geological Survey
Location:
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