Ontario Geological Survey
Permanent Link to this Record:
MDI42P03SW00002
| Record Name(s) | Cheepash River - 1928, Roebuck Gypsum - 1963 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1983-Dec-19 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gypsum
Secondary Commodities: Limestone (Crushed Stones)
Township or Area: Roebuck
Latitude: 51° 5' 2.81" Longitude: -81° 19' 32.37"
UTM Zone: 17 Easting: 477189.979 Northing: 5659229.148 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42P03SW
Point Location Description: Approximate center of 6 miles (9 km) of discontinuous exposure along south bank of Cheepash River
Location Method: Other Literature
Access Description: On Cheepash River, outcrops of gypsum are numerous and closely spaced over a distance of about 5.5 miles. The east (downstream) end of the outcrop zone is about 10 miles above the Ontario Northland Railway bridge which crosses near the mouth of the river. (GSC Memoir 379, p.91) The area can be accessed in the summer by train (ONR line from Cochrane to Moosonee, Ontario), river (canoe or inflatable boat), or helicopter. In winter, access is by winter roads, train and helicopter. (OGS OFR 5728, pp.3,5).
1963--Moosonee Gypsum Exploration Co. Ltd. (ELO 13438): 18 vertical drill holes drilled over 3 mile stretch of south bank of river 1964--Ontario Department of Mines: Channel sampling 1988--Ontario Geological Survey: Mapping and sampling, geochemistry, thin section analyses.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-732 | 42P03SE0002 | 42P03SE0002 |
Province: Paleozoic and Mesozoic Basins
Subprovince: Moose River Basin
Dec 07, 2005 (D Draper) - Gypsum occurrences of the Moose River Basin are considered part of the lower Middle Devonian Moose River Formation. (GSC MEM 379, p.90). In some areas of outcrop, the massive gypsum unit here is overlain by gypsum breccia consisting of grey, fine- to medium-grained clasts of gypsum and limestone in a matrix of dark green-grey argillacious material. The breccia unit is overlain by impure white to brown massive gypsum at some outcrops, consisting of medium to finely crystalline gypsum with abundant limy clots and bands of argillacious and laminated limestone. (OFR 5728, p.36).
| Rock Type | Rank | Composition | Texture | Relationship | Limestone | 1 | Near |
|---|---|---|---|---|
| Gypsum | 2 | Host |
Dec 07, 2005 (D Draper) - Drilling intersected interbedded limestone and gypsum; gypsum encountered to depth of drilling (145 feet). Formation considered Middle Devonian in age. [ODM MP 10, p.82] [Q] The river banks expose up to 25 feet of white, medium-grained, massive, colloform gypsum with very minor amounts of brown limestone laminae. [1963 drilling] confirmed an extremely scalloped gypsum surface caused by deep glacial gouging and solution. (MP 10, p.84) The massive snow-white gypsum exhibits a chickenwire mosaic texture. It is typically crystalline with banding prominent in some sections. The bands consist of alternating massive gypsum and dark brown to clear, coarsely crystalline selenite. (OFR 5728, p.36).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gypsum | Economic | Ore | ||||
| 2 | Selenite | Economic | Ore |
Dec 07, 2005 (D Draper) - Three 8 to 10 foot surface channel samples returned from 94.46 to 96.51% gypsum (IMR 18, ODM vertical channel sampling, 1964). Best drill intersection (57ft) encountered in Hole #14: Gypsum, pure, white, sugary texture, 10% selenite at beginning of section...less then 1% impurity thruout the section (T-732) OGS geochemical analyses of 78 samples returned an averaged gypsum value of 96.57%.
Map - Moosonee sheet, geological compilation series, Cochrane District
Publication Number: M2171 Scale: 1:253,440 Date: 1969
Author: Bennett G., Brown D.D., George P.T., Guillet G.R.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Moose River Basin, District of Cochrane, Ontario
Publication Number: ARM37P Scale: 1:506,880 Date: 1997
Author: Dyer W.S.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Gypsum in Ontario
Publication Number: IMR018 Page: 47-52 Date: 1997
Author: Guillet G.R.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geology, Hudson Bay Lowlands, Manitoba, Ontario, Quebec and District of Keewatin
Publication Number: Map 17-1967 Scale: 1:1,013,760 Date: 1967
Author: Norris, A W; Sanford, B V; Bostock, H H
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/107628
Mono - Operation Kapuskasing
Publication Number: MP010 Page: 84-85 Date: 1967
Author: Bennett G., Brown D.D., George P.T., Leahy E.J., Guillet G.R.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Moosonee sheet, geological compilation series, Cochrane District
Publication Number: M2171 Scale: 1:253,440 Date: 1969
Author: Bennett G., Brown D.D., George P.T., Guillet G.R.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology and economic deposits of the Moose River basin
Publication Number: ARV37-06.001 Page: 41 Date: 1998
Author: Dyer W.S.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Geology and bibliography of the Hudson Bay Lowlands, Operation Winisk; Geological Survey of Canada, Paper 67-60
Publication Number: Paper 67-60 Page: 42 Date: 1968
Author: Sanford, B V; Norris, A W; Bostock, H H; Bell, R T
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100932
Publication - Devonian stratigraphy of the Hudson Platform; Geological Survey of Canada, Memoir no. 379
Publication Number: GSC Mem 379 Page: 91 Date: 1975
Author: Sanford, B V; Norris, A W
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/127033
Compend - Mesozoic geology and mineral potential of the Moose River Basin
Publication Number: S021 Page: 175 Date: 1982
Author: Telford P.G., Verma H.M.
Publisher Name: Ontario Geological Survey
Location:
Mono - Industrial minerals of northern Ontario
Publication Number: MDC026 Page: 129 Date: 1985
Author: Vos M.A., Abolins T., McKnight R.L.W., Smith V.
Publisher Name: Ontario Geological Survey
Location:
Mono - Geology of gypsum deposits in the James Bay Lowland
Publication Number: OFR5728 Page: 28,32-37,45,89 Date: 1990
Author: Bezys R.K.
Publisher Name: Ontario Geological Survey
Location:
Mono - Gypsum in northern Ontario: resources and market potential
Publication Number: IMBP012 Page: 14 Date: 1997
Author: Hains Technology Assoc., Bezys R.K., Muir J.E.
Publisher Name: Ontario Ministry of Northern Development and Mines
Location:
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