Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52L07SE00047

Record: MDI52L07SE00047

General

Commodities

Primary Commodities: Rubidium

Secondary Commodities: Cesium, Niobium, Beryllium, Tantalum, Tin, Lithium

Location

Township or Area: Paterson Lake Area

Latitude: 50° 17' 33.53"    Longitude: -94° 38' 10.55"

UTM Zone: 15    Easting: 383450   Northing: 5572450    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52L07SE

Point Location Description: Pegmatite is located 60 km north of Kenora

Location Method: Data Compilation

Access Description: Pegmatite occurs 60 km north of Kenora on an all weather road.

Exploration History

1999: Champion Bear Resources conducted geological mapping and sampling. 2001: Champion Bear conducted geological mapping. 2017: Avalon Advanced Materials Inc. conducted prospecting and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: English River

Belt: Separation Lake

Geological Age: Archean  

Lithology

Lithology Comments

Jul 13, 2010 (C Ravnaas) - The pegmatite is hosted by the Skidder pluton, a garnet-biotite granite intrusion. The pegmatite is tourmaline-muscovite potassic pegmatite and layers of aplite.

Mineralization

Mineralization Comments

Jul 12, 2017 (C Ravnaas) - The ore minerals are cassiterite, beryl. The pegmatite contains common minerals: K-feldspar, quartz, muscovite, albite (aplite and cleavelandite); accessory minerals include tourmaline, beryl, siderophyllite, apatite; and rare minerals include cassiterite. Bulk analysis of the pegmatite revealed an average of 278 ppm Cs, 32 ppm Ta, 44 ppm Nb, 90 ppm Sn, 1510 ppm Rb, 0.08 wt.% Li2O, 14 ppm Be from 12 grab samples (Breaks, Tindle and Smith 1999).

Jul 29, 2019 (Therese Pettigrew) - The Rattler Pegmatite is a series of deformed lenses, dykes and boudins, in up to 7 x 12 m segregations consisting of pink, coarse grained to locally megacrystic pegmatite hosted in strongly foliated amphibolite. It is exposed in a series of narrow stripped outcrops over a 60 m eastwest strike length. The pegmatite is mineralogically simple and likely represents a weakly evolved pegmatitic phase proximal to the Separation Rapids Pluton, Skidder pluton, or other associated progenitor. No Li-minerals were observed, with beryl in quartz pods being the only rare-element mineral reported (Breaks, 1999). A sample collected during the 2011 program returned assays of 27 ppm Li, 20 ppm Nb, 11 ppm Cs, 99 ppm Rb, 5.1 ppm Ta, 1010 ppm W, and 34 ppm Ce (Assessment report 52L07SE2013). The Rattler Zone has a width of approximately 20 m and an exposed strike of nearly 50 m. The westerly extension is covered by a spruce swamp. Easterly, the dyke splits into two; the northerly section is comprised of the typical pink pegmatoidal unit and the south section comprised mostly of the porphry phase with minor pegmatite. The core section of the Rattler dyke is comprised of a coarse muscovite pegmatite with moderate garnet, tourmaline and beryl. Aplite forms 10-15% of this core section that attains a width of six meters. The marginal phase of the dyke is comprised of medium-grained albite pegmatite and a clotty biotite-garnet-tourmaline granite (Assessment report 52L07SE2006). A sample collected during the 2017 program from a medium-grained leuocratic pegmatite containing muscovite, albite, and tourmailne and returned values of 360 ppm Li, 196 ppm Cs, 1170 ppm Rb, 37 ppm Sn, and 12.3 ppm Ta (Assessment report 20000015331).

Assay Samples

Mineral Record Details

Mineral Zones - Size and Shape

References

Compend - Summary of Field Work and Other Activities, 1999

Publication Number: OFR6000 Date: 1999

Author: Ayer J.A., Baker C.L., Kelly R.I., Stott G.M., Thurston P.C.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Operation Kenora-Sydney Lake, Umfreville-Separation lakes sheet, District of Kenora

Publication Number: P1028 Scale: 1:63,360    Date: 1975

Author: Breaks F.W., Bond W.D., McWilliams G.H., Gower C.F., Findlay D.C., Stone D.

Publisher Name: Ontario Division of Mines

Location:

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:

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.

Terms of Use

Please review our Terms of Use agreement for this data product.

Ministry Contact Information

For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office