Ontario Geological Survey
Permanent Link to this Record:
MDI000000001062
| Record Name(s) | Turtleback Pegmatites - 1997 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2011-Mar-07 |
| Date Last Modified | 2023-May-18 |
| Created By | |
| Revised By |
Primary Commodities: Rubidium, Tantalum
Secondary Commodities: Lithium, Cesium
Township or Area: Paterson Lake Area
Latitude: 50° 15' 42.51" Longitude: -94° 30' 38.11"
UTM Zone: 15 Easting: 392332 Northing: 5568832 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L07SE
Point Location Description: Taken from sample location map AFRO 2.19410
Location Method: Data Compilation
Access Description: Access to the area is via the English River Road, an all-weather gravel road. The property is dissected by a network of abandoned secondary clay and sand based logging and drill roads. The southern and central portions of the property are accessible by boat via the English River
From 1996 to 1998, Tanco completed several programs of geological mapping and lithogeochemical sampling over the entire claim area. 1997: Tanco drilled 10 DDH totalling 854.35 m. 1999: Tanco conducted petrologic field survey. 2003: Tanco conducted geological mapping.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.19410 | 52L08SW2005 | 52L08SW2005 |
| 2.182226 | 52L08SW2002 | 52L08SW2002 |
| 2.20238 | 52L08SW2008 | 52L08SW2008 |
| 2.26185 | 52L08SW2013 | 52L08SW2013 |
Mar 07, 2011 (C Ravnaas) - The pegmatite field at Separation Lake is seven kilometres long by three kilometres wide and trends in an east to west direction. It is hosted by supracrustal rocks (Blackburn et al., 1992; Blackburn and Young, 1992). The area is predominantly underlain by mafic metavolcanic units and associated gabbroic units. Felsic metavolcanic and metasedimentary rocks exist to the north of the property and pinch out to the east. Most rock units are strongly deformed and metamorphosed to at least lower amphibolite facies. Reference Tanco, Kenora District Geologist Office Assessment File 52L07SE Q-3 AFRO 2.19410
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent |
Mar 07, 2011 (C Ravnaas) - The predominant rock type in the area is a fine to medium grained, medium gray to black, well foliated mafic metavolcanic, possibly of basaltic composition. This unit comprises most of the central portion of the claim group. Coarse grained, dark coloured gabbro has been mapped in the center of the mafic metavolcanic unit. It appears to indicate a folding pattern. As well, narrow bands of chemical metasedimentry iron formation occur throughout the region. These iron formation units tend to display a highly gossaned appearance. The mafic metavolcanic unit is bounded to the north and to the south by regional granitoid complexes, both of which contain granitic gneissic and pegmatitic units. Well exposed to the north is the Treelined Lake Granite, which is part of the English River Subprovince. The granitic unit to the south is part of the Winnipeg River Subprovince. Reference Tanco, Kenora District Geologist Office Assessment File 52L07SE Q-3 AFRO 2.19410
Mar 07, 2011 (C Ravnaas) - Geology and sample location map indicated anomalous to highly anomalous Li, Cs and Rb assay results from samples collected during Tanco lithogeochemistry survey. Assay result rpesent in AFRO 2.20238 are up to 221 ppm LI, 800 ppm Rb, 142 ppm Cs. Reference Tanco, Kenora District Geologist Office Assessment File 52L07SE Q-3 AFRO 2.19410
Jul 14, 2017 (Therese Pettigrew) - The highest tantalum value was 0.017% Ta2O5, from a 5 foot interval in a pegmatite stringer in DDH SL-97-06 (AFRI 52L08SW2002). Sample 18830 from on surface of the Turtleback Pegmatite assayed 436.5 ppm Li and 1518.3 ppm Rb. Sample 18835 from core drilled through the Turtleback Pegmatite assayed 425.8 ppm Li and 1708 ppm Rb. (AFRI 52L08SW2013).
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
Map - Precambrian Geology, Separation Lake Greenstone Belt-West Sheet
Publication Number: P2673 Scale: 1:20,000 Date: 2008
Author: Blackburn C.E., Young J.B., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
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