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Ontario Geological Survey
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MDI31C05NE00014
| Record Name(s) | Marmoraton - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 1983-Feb-28 |
| Date Last Modified | 2022-Apr-04 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Marmora
Latitude: 44° 28' 41.65" Longitude: -77° 39' 26.55"
UTM Zone: 18 Easting: 288664.63 Northing: 4928426.74 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C05NE
Point Location Description: The deposit is located 2 km southeast of the town of Marmora
Location Method: Conversion from MDI
Access Description: The deposit is accessed via the Marmoraton Mine road located approximately 1.5 km east of Marmora off of highway # 7. The Marmoraton mine road leads south directly to the partially water filled pit and viewing platform, and mill buildings.
1950-1951- 40 diamond drill holes were drilled by Bethlehem Steel Corp for a total of 37,000 feet. 1952-1955 - Removal of 22 million tons of limestone, mine and plant construction by Marmoraton Mining Co. Ltd. 1955-1967 - 6,053,145 tons of ore shipped from open pit 1/2 mile long by 1/4 mile wide. 1978 - mining in the pit ceased.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Geological Age: Mesoproterozoic
Dec 07, 2005 (C Papertzian) - This is a contact metasomatic deposit. Magnetite-bearing skarn, containing magnetite (50-55%), salite, hornblende, chlorite, pyrrhotite (1-3%), and minor amounts of calcite, apatite, and sphalerite, in marble at a syenite-diorite contact over a length of 2,100 feet. The deposit was overlain by approximately 130 feet of mainly Ordovician limestone and glacial drift. The deposit contains magnetite rich zones 50 to 100 feet wide which form a tablular body up to 400 feet wide and 2,100 feet long and is known to extend to at least 750 feet below the Paleozoic strata. Exploration drilling (1950-1951) indicated more than 20 million tons available to open pit mining. Ore grades are approximately 35% Fe. Mining is at a rate of approximately 500,000 tons of pellets obtained from 3.1 million tons of ore and waste per year.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Magnetite | Economic | Ore | ||||
| 2 | Andradite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Chlorite | Economic | Ore | ||||
| 5 | Epidote | Economic | Ore | ||||
| 6 | Goethite | Economic | Ore | ||||
| 7 | Hornblende | Economic | Ore | ||||
| 8 | Pyrite | Economic | Ore | ||||
| 9 | Pyrrhotite | Economic | Ore | ||||
| 10 | Serpentine | Economic | Ore | ||||
| 11 | Sphalerite | Economic | Ore | ||||
| 12 | Sphene | Economic | Ore |
Oct 29, 2012 (Scott Charbonneau) - In 2010, two samples from the waste pile were analyzed by Tweed RGO staff for REE content. One sample consisting of 80% magnetite, 5% pyrite/chalcopyrite, and minor biotite, chlorite and ankerite contained no anomalous levels of REE. The second sample consisting of 75% magnetite, 25% epidote with traces of pyrite and pyrrhotite contained 1840 ppm La, 1720 ppm Ce, and anomalous levels of Pr and Nd (121 and 282 ppm, respectively). Converted to rare earth oxide content these values are 2158 ppm La2O3 and 2014 ppm Ce2O3; approximately 0.4% combined REO.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Lens | 610 | 67.5 | OFR5515, p.322 |
Date: Mar 16, 2004
Geologist: C Papertzian
Notes: This deposit was visited on July 24th, 2003. The partially water-filled open pit was viewed at the site. Activity on the site is limited to Canada Talc and Aecon Ltd. Canada Talc is utilizing the mill buildings to upgrade their talc from their mine in Huntingdon Township while Aecon continues to crush and ship the limestone caprock for aggregrate.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Marmoraton | 1978 | Probable | 2246608 | OFR5515, p.322 | Magnetite 43 Percent |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1978 | 25371020 |
Magnetite 25371020 Tonne |
OFR5515, p.322 | Net tons of iron ore mined from 1955-1978. Average grade of 42.8% Fe. |
Publication - Geology of iron deposits in Canada: Iron deposits in the Appalachian and Grenville regions of Canada; Geological Survey of Canada, Economic Geology Report 22 vol. II
Publication Number: EGR 22 Page: 80-82 Date: 1967
Author: G.A. Gross
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102456
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 166 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Metallogeny of the Grenville Province, southeastern Ontario
Publication Number: OFR5515 Page: 322-31,96 Date: 1984
Author: Carter T.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Geology of Belmont, Marmora, and southern Methuen townships, Peterborough and Hastings counties
Publication Number: OFR5537 Page: 188-9 Date: 1985
Author: Bartlett J.R., Moore J.M.
Publisher Name: Ontario Geological Survey
Location:
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