Ontario Geological Survey
Permanent Link to this Record:
MDI000000000151
| Record Name(s) | F-anomaly - 2001 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2006-Oct-05 |
| Date Last Modified | 2023-May-19 |
| Created By | |
| Revised By |
Primary Commodities: Tantalum, Cesium, Rubidium, Lithium
Secondary Commodities: Niobium
Township or Area: Ferguson Lake Area
Latitude: 51° 38' 47.16" Longitude: -88° 16' 1.71"
UTM Zone: 16 Easting: 412328 Northing: 5722475 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52P09NW
Point Location Description: Location obtained from assessment file map.
Location Method: Data Compilation
1940-41: 3 pegmatic dykes identified by V.K. Prest while mapping. 1956: Standard Lithium Corporation Ltd. - staked claims, drilled 12 ddh totalling 968 m, trenching and channel sampling undertaken. 1962: Robert Campbell acquired the property and drilled 4 ddh totalling 141 m. 1979-82: The Tantalum Mining Corp. of Canada Ltd. (Tanco) – performed lithogeochemistry, e.m., mag., and 52 ddh totalling 5367 m, 9 of which holes were drilled on the F Anomaly. At least 11 separate anomalies were outlined, with subsequent detailed mapping of several of these. Tanco let the claims lapse in 1985. 1986: Gold Fields Canadian Mining Ltd. – staked the claims and undertook prospecting, channel sampling, mapping, biogeochemcal sampling, assay previously drilled core (1545 samples from 27 drill holes). Airborne magnetic and EM surveys were flown over the west half of the property. No new DDH were drilled by Gold Fields. 1988: All leased claims were cancelled. 1994: Placer Dome Canada Ltd. staked a large series of contiguous claim blocks over the area. 1999 - 2001: Avalon Ventures carried out an exploration program consisting of geophysical surveys (gravity and magnetic), prospecting, geological mapping, a bedrock lithogeochemical survey, diamond drilling and assaying. 1 DDH totalling 290 m was drilled in the F Anomaly and 27 channel samples collected. 2000-2001: Joint venture between Avalon and Global Canada. JV terminated following the 2001 program. The project has been inactive since 2001 awaiting a recovery in tantalum prices or new demand for cesium minerals. 2009: Avalon Ventures changed name to Avalon Rare Metals.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.3057 | 52P09NE0017 | 52P09NE0017 |
| 16 | 52P09NW0021 | 52P09NW0021 |
| 2.3375 | 52P09NW9397 | 52P09NW9397 |
| 2.10838 | 52P09NW0007 | 52P09NW0007 |
| 2.10839 | 52P09NW0010 | 52P09NW0010 |
| 2.4885 | 52P09NE0015 | 52P09NE0015 |
| 2.5649 | 52P09NE0014 | 52P09NE0014 |
| 2.21519 | 52P09NE2004 | 52P09NE2004 |
| 2.22617 | 52P09NE2005 | 52P09NE2005 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Miminiska-Fort Hope
Geological Age: Neoarchean
Oct 05, 2006 (Mark Puumala) - The Lilypad Lakes occurrences are hosted within numerous pegmatite dikes ranging from several centimeters to tens of metres wide (Taylor et al., 2005). The majority of the dikes are reported to strike in an approximately east-west direction (i.e., 240 to 270). However, numerous dikes oriented in an approximately north-south direction are also present. Diamond drilling information indicates that the dikes are also typically continuous to a depth of at least 100m. A number of types of pegmatite dikes were identified by Breaks and Tindle (2004). These deposits belong to the rare-element class of the LCT (lithium-cesium-tantalum) geochemical family, and include albite-type, albite-spodumene type, and complex-type (spodumene and elbaite-subtypes) pegmatites. Details regarding the specific characteristics of the six occurrences/deposits listed above are provided below. Taylor et al. (2005) recognize evidence of two principal regional deformation events in the vicinity of these deposits. Both events have affected the pegmatite dikes and host rocks. The earliest deformation event is characterized by a strong to intense penetrative to locally-spaced cleavage in the metasedimentary and metavolcanic rocks. This fabric approximately parallels stratigraphy in the supracrustal rocks. This fabric is also weakly developed in the more competent pegmatite dikes, and has been noted in the northern portions of the Kawitos Lake batholith. This fabric is likely to have been related to a regional N-S compressional event, and is axial planar to isoclinal folds. A second later strain event is represented by crenulation folds that overprint the earlier fabric. With the esceprion of the Spodumene dike, most pegmatites show little evidence of having been impacted by the second deformation event. These deposits are likely to be genetically related to the Kawitos Lake batholith, which has been identified by Breaks and Tindle (2004) as a potential fertile S-type granite pluton similar to others that are located near the Uchi-English River Subprovince boundary.
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Spodumene | Economic | Ore | ||||
| 2 | Pollucite | Economic | Ore | ||||
| 3 | Lepidolite | Economic | Ore |
Oct 05, 2006 (Mark Puumala) - The F Anomaly Dike occurrence is described by Taylor et al. (2005) as a group of variably oriented pegmatites up to 3 m wide that intrude felsic intrusive and metavolcanic rocks. The dikes have similar mineralogy to the Rubellite Dike and are composed of albite, quartz, rubellite, lepidolite, spodumene, green mica and potassium feldspar, with accessory pollucite and tantalum oxides. Average grades from 27 channel samples collected at surface from this occurrence were reported as 0.080% Ta2O5, 0.190% Cs2O, 0.384% Rb2O and 0.416% LiO2.
Aug 05, 2014 (Therese Pettigrew) - During the 2000 surface program, a total of 8 samples (including a chip sample taken in 1999) were assayed and averaged 0.080% Ta2O5, 0.465% Cs2O, 0.357% Rb2O, 0.009% Nb2O5 and 0.309% Li2O (Morgan and Pedersen, 2000 AFRI 52P09NE2004). A total of 27 channel samples were collected from the F Anomaly pegmatites during the 2001 exploration program. The average from all channel samples is 0.080% Ta2O5, 0.180% Cs2O, 0.384% Rb2O and 0.416% Li2O. Pegmatites with elevated cesium grades also invariably contain elevated lithium. Grab Sample 26953 assayed 0.097% Ta2O5, 2.727% Cs2O, 0.136% Rb2O and 1.107% Li2O Grab Sample 1720 assayed 0.073% Ta2O5, 2.130% Cs2O, 0.516% Rb2O and 1.900% Li2O. Ta2O5 contents for the microlite in the F anomaly was determined to be 77.88%. Tanco drill holes F-1 and F-9 intersected this pegmatite at depth, where the true width is estimated to be approximately 3 m (Rees, 2001 AFRI 52P09NE2005).
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
Map - Precambrian Geology, Opikeigen Lake Area
Publication Number: P3269 Scale: 1:20,000 Date: 2005
Author: Hall L.A.F.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Opikeigan Lake area, District of Kenora (Patricia Portion)
Publication Number: R185 Date: 1978
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Map - Opikeigan Lake, Kenora District
Publication Number: M2379 Scale: 1:31,680 Date: 1977
Author: Wallace H.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences and Prospects in the Fort Hope-Winisk Area
Publication Number: OFR5926 Date: 1995
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
Location:
Article - Precambrian Geology and Mineral Potential of the Opikeigen Lake Area
Publication Number: OFR6145.008 Date: 2004
Author: Hall L.A.F.
Publisher Name: Ontario Geological Survey
Location:
Article - Rare-Element Granitic Pegmatites of the Fort Hope Field, North-Central Ontario
Publication Number: OFR6145.011 Date: 2004
Author: Breaks F.W., Tindle A.G.
Publisher Name: Ontario Geological Survey
Location:
Publication - The Nature and Distribution of Tanatalum Mineralization in Pegmatite Dikes, Lilypad Lakes Property, Fort Hope, Northwestern Ontario.
Publication Number: Date: 2005
Author: Taylor, R.P. et al.
Publisher Name: Exploration and Mining Geology
Location: Vol. 1, Nos. 1-4, p. 31-44.
Map - Wottam Lake, Kenora and Thunder Bay districts
Publication Number: M2417 Scale: 1:31,680 Date: 1979
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology of the Miminiska Lake Area, Fort Hope Greenstone Belt
Publication Number: P3764 Scale: 1:50,000 Date: 2012
Author: Buse S.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Miminiska Lake area, District of Kenora (Patricia Portion)
Publication Number: P0992 Scale: 1:31,680 Date: 1976
Author: Wallace H.
Publisher Name: Ontario Division of Mines
Location:
Map - Geological Compilation of the Miminiska-Fort Hope Area, Eastern Uchi Domain
Publication Number: P3611 Scale: 1:250,000 Date: 2009
Author: Madon Z.B., McIlraith S.J., Stott G.M.
Publisher Name: Ontario Geological Survey
Location:
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