Ontario Geological Survey
Permanent Link to this Record:
MDI42B03SE00004
| Record Name(s) | Nemegosenda Southeast Zone - 2009, Dominion Gulf Zones A, B, F, G - 1985, Nemegosenda East - 1961 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1994-Jul-21 |
| Date Last Modified | 2022-Apr-26 |
| Created By | |
| Revised By |
Primary Commodities: Niobium
Secondary Commodities: Neodymium, Thorium, Tantalum, Cerium, Uranium, Lanthanum, Phosphate, Zircon
Township or Area: Chewett
Latitude: 48° 0' 17.19" Longitude: -83° 4' 13.62"
UTM Zone: 17 Easting: 345571.38 Northing: 5318905.01 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42B03SE
Point Location Description: Trench to expose bedrock on Niobium Zone G & F.
Location Method: Field Visit with GPS
Access Description: Easy access to the area is possible via the Nemogesenda logging road. Northwest off this road near the intersection with the highway is a secondary road leading towards Nemogesenda Lake and some recent logging operations. The logging road leads directly to the area of the deposit. The Ministry of Natural Resources have attempted to barricade the road in a number of places and post signs stating that access to the area is prohibited.
1954-56: Dominion Gulf Resources - airborne magnetic survey, ground geophysics, DD-56-10760 m, mapping, bulk sampling. 2010: Sarissa Resources Inc. - DD-2-646 m, trenching A bulk sample collected from red fenites by Dominion Gulf Resources returned an analysis of 0.5% Nb2O5, 0.04% U3O8 and 0.03% ThO2.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-6143 / 2.45017 | 20000006093 | 20000006093 |
| T-6094 / 2.44507 | 20000004564 | 20000004564 |
| T-2037 / 63.681 | 42B03SE0002 | 42B03SE0002 |
| T-2037 | 42B03SE0004 | 42B03SE0004 |
Province: Kapuskasing Structural Zone
Geological Age: Mesoproterozoic Geochronological Age: 1015 +/- 63 MA Geochron. Age Ref.: S034, p. 29
Dec 07, 2005 (S Fumerton) - There are five en-echelon zones within the East Nemegosenda deposit. Overall the nepheline syenite pipe has a magmatic ring structure on the large scale where as on the small scale magmatic brecciation is important. The breccia at the deposit is located at the contact where the alkalic magma intrudes the altered country rocks.
Dec 02, 2010 (A Wilson) - The Nemegosenda Lake Alkalic Rock Complex consists of fine-to medium-grained, syenitic to malingitic rocks which are bordered along the south margin by an arcuate mass of coarse-grained nepheline syenite. The complex is enclosed in a fenitized envelope produced by metasomatism. The complex is cut by numerous lamprophyre, syenite and rusty brown-weathering carbonate dikes. The main area of mineralization appears to be representative of contact phenomena between the intrusive syenite and fenitized wall rock. The complex is enclosed within the gneissic rocks of the Kapuskasing Structural Zone.
| Rock Type | Rank | Composition | Texture | Relationship | Fenite | 1 | Fenite | Pyroxenitic | Host |
|---|---|---|---|---|
| Syenite | 2 | Malignite | Pyroxenitic | Host |
| Carbonatite-Unsubdivided | 3 | Contains | ||
| Pegmatite | 4 | Biotite-Orthoclase | Host |
Dec 07, 2005 (S Fumerton) - A large intrusive nepheline syenite pipe referred to as the Nemegosenda Lake alkalic complex hosts the mineralization. This intrusive in turn is located and related to the Kapuskasing Structural High. The mineralized phase is a fine to medium grained malignite or melanocratic nepheline syenite which has been termed a jacupirangite. Accessory minerals include aegirine, biotite, garnet, pyrochlore, magnetite and apatite. Some biotite orthoclase pegmatite zones also occur and host some mineralization. Extensive descriptions of the geological setting have been published.
Dec 07, 2005 (A Wilson) - These zones are hosted by pyroxenitic fenites (locally fragmented) interbanded with red fenite with or without replacement by fine magnetite and green garnets. The high-grade portion of Zone B is hosted by jacapirangite. Zone E is hosted by an orthoclase-biotite pegmatite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrochlore | Economic | Ore | ||||
| 2 | Monazite | Economic | Ore | ||||
| 3 | Apatite | Economic | Ore |
Dec 07, 2005 (S Fumerton) - The mineralization is associated with pyrochlore with the malignite and fenite. Pyrochlore occurs as zoned crystals as inclusions within or adjacent to aegirine augite grains. Though a number of commodities have been listed for this deposit, only the niobium content was evaluated.
Oct 07, 2014 (A Wilson) - Pyrochlore as well as monazite is visible in Zone A. Zone A returned an average of 0.45% Nb2O5 over 116 of core. Zone B returned an average of 0.43% Nb2O5 over 101 feet of core. Zone E returned 0.43% Nb2O5 over 43 feet of core. Zone F averaged 0.37 % Nb2O5 over 169 feet of core. Significant assays from the 2010 diamond drilling included: an overall grade of 0.35% Nb2O5 over the length of DDH 10-81 including 0.47% Nb2O5 over 119 m, 194 ppm Ta2O5 over 75 m from 51 to 124 m and 823 ppm Nd over 12 m from 218 m to the end of the hole. A bulk sample collected from red fenites by Dominion Gulf Resources returned an analysis of 0.5% Nb2O5, 0.04% U3O8 and 0.03% ThO2.
Oct 07, 2014 (P Bousquet) - Sarissa Resources Inc. drilled two holes in that area (81-10 and 83-10) which returned assays of up to 0.96% Nb2O5 (81-10) and 0.838% Nb2O5 (83-10). The highest values came from duplicates.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 1000 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 500 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 450 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 250 |
Date: Jul 21, 1994
Geologist: S Fumerton
Notes: A brief visit was made to ascertain the access to the area and what visible signs are left from the early exploration. Recent logging operations have all but obliterated any signs of the exploration fabric. Though it was presumably during this period that some old drill core was stored in a small steel container. The core boxes which are still legible appear to represent the complete core from holes #13, #14, #15, #16, #17, #27, #28, #33 and #41. Considering the excellent condition of the core it must have been transferred from some kind shed / shack of which there is no sign. The logging operations appear to have locally connected up with old drill roads but no drill set-ups could be recognized. One trench, which was presumably excavated to expose bedrock in shallow overburden at the north end of the 'F' zone, was found adjacent to the 'drill trail' at the edge of the forestry cut.
Map - Nemegosenda Lake area, District of Sudbury
Publication Number: M2007 Scale: 1:15,840 Date: 1997
Author: Parsons G.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Chapleau-Foleyet, geological compilation series, Algoma, Cochrane and Sudbury districts
Publication Number: M2221 Scale: 1:253,440 Date: 1976
Author: Thurston P.C., Sage R.P., Siragusa G.M.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Niobium-bearing complexes east of Lake Superior
Publication Number: R003 Page: 33-50 Date: 1997
Author: Parsons G.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Aeromagnetic maps of carbonatite-alkalic complexes in Ontario
Publication Number: P0452-REV Scale: 1:4,224,000 Date: 1997
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Uranium and thorium deposits of northern Ontario
Publication Number: MDC009 Page: 68 Date: 1968
Author: Robertson J.A.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Columbium (niobium) deposits of Ontario
Publication Number: MDC014 Page: 41-42 Date: 1971
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Article - Carbonatite-alkalic complexes
Publication Number: MP067.013 Page: 71-73 Date: 1997
Author: Sage R.P.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of the Chapleau area, districts of Algoma, Sudbury, and Cochrane
Publication Number: R157 Page: 109, 266-267 Date: 1977
Author: Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Division of Mines
Location:
Mono - Uranium and thorium deposits of northern Ontario
Publication Number: MDC025 Page: 117 Date: 1984
Author: Robertson J.A., Gould K.L.
Publisher Name: Ontario Geological Survey
Location:
Book - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario
Publication Number: GSC OF 1087 Date: 1985
Author: Rose, D.G.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/129999
Publication - Nemegosenda Lake Niobium Property, NI 43-101 Technical Report
Publication Number: NI 43-101 Date: 2010
Author: P. Chance
Publisher Name:
Location: Timmins RGO
Mono - Geology of the Nemegosenda Lake alkalic rock complex
Publication Number: OFR5410 Page: 63-70 Date: 1984
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Publication - Press releases
Publication Number: Date: 2008
Author: Sarissa Resources Inc.
Publisher Name:
Location: Timmins RGO
Mono - Geology of carbonatite-alkalic rock complexes in Ontario: Nemegosenda Lake alkalic rock complex, District of Sudbury
Publication Number: S034 Page: 34-38 Date: 1987
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)
Publication Number: OFR5912 Page: 664-665 Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Timmins Resident Geologist District Office