Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52P09SW00010

Record: MDI52P09SW00010

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Frond Lake Area

Latitude: 51° 35' 54.05"    Longitude: -88° 26' 26.77"

UTM Zone: 16    Easting: 400209.997   Northing: 5717350.001    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52P09SW

Point Location Description: Diamond drill hole

Location Method: Data Compilation

Access Description: The North Wottam Lake occurrence ins located 120 km east-northeast of Pickle Lake and approximately 140 km due north of Lake Nipigon. Accessible by float plane from Pickle Lake east to Wottam lake, then by foot due north for approximately 0.5 km, to the occurrence.

Exploration History

1945: Geomagnetic survey, and geological mapping, 6 ddh (x-ray) - International Mining Corporation (Canada). 1974-75: The Miminiska lake area was mapped by Henry Wallace of the OGS (RPT 214) which covered the Wottam Lake area. 1979: AM - New Jersey Zinc. Expl. Company Ltd. Via Questor Surveys Ltd. 1982: HL-EM, and MAG. Survey - Gallion Resources Ltd. 1986: Helicopter - borne MAG, VLF-EM and EM - Gold Fields Canadian Mining via Aerodat Ltd. Subsequent line cutting, geological mapping, biogeochemical sampling, and Max- Min II and mag. Surveys where carried out. 1987: 797 ft. ddh - Gold Field Canadian Mining Ltd. 2002 - 2006: Landore Resources has carried out an exploration program on properties that cover the area between Miminiska and Goss Lakes. This work includes geological and geophysical compilation, geological mapping, prospecting, diamond drilling and assays.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Miminiska-Fort Hope

Geological Age: Neoarchean  

Geology Comments

Oct 10, 2006 (Mark Puumala) - The rocks of the Wottam Lake area are dominated by a thick sequence of metasedimentary rocks described by Wallace (1981) as predominantly monotonously intercalated wacke and mudstone. This sedimentary sequence also contains numerous horizons of oxide, carbonate and/or silicate facies iron formation. Some of these iron formation units have considerable thickness (i.e., up to 150 m), with the most notable iron formation being located at the eastern end of Miminiska Lake. This iron formation thins considerably toward the northeast, and several thinner (typically <10 m) iron formation horizons have been mapped to the south (Needham 2005). The metasedimentary sequence conformably overlies a thick, predominantly mafic metavolcanic sequence that is located to the south. A second predominantly mafic metavolcanic rock sequence interpreted by Wallace (1981) to overlie the metasedimentary rocks has also been mapped to the north. A number of large felsic intrusions occur to the north (Cluff Lake Stock, South Bay Stock and Troutfly Lake Batholith) and south (Kawitos Lake Batholith) of these supracrustal sequences. Mapping by Wallace (1981) indicates that sedimentary bedding in the Wottam Lake area typically strikes in an east-northeasterly direction, with moderate to steep northward dip. Further west, in the vicinity of Miminiska Lake, bedding stikes approximately east-west with near-vertical dips. A number of approximately easterly-trending isoclinal folds are interpreted by Wallace (1981) to occur within the metasedimentary sequence. These include a synclinal structure with an axial trace that passes through Wottam and Goss Lakes, and a second syncline with an axial trace that extends from an area north of Miminiska Island toward Seagreen Lake. Needham (2005) has has indicated that strong foliation is present at numerous locations throughout the Wottam Lake area. The foliation is typically parallel to sedimentary bedding, with dips ranging from 50 to 80 degrees to the north. However, it was locally observed to be 10 to 20 degrees oblique to bedding. Notable locations with strong foliations include the northern sedimentary/volcanic contact and an area approximately 200 to 300 m north of Wottam Lake associated with the WSaspy3 (International) occurrence. Outcrop-scale isoclinal folds and localized arsenopyrite mineralization are commonly observed in the strongly foliated sedimentary rocks. A number of major northeast-striking faults paralleling Ferguson Creek have also been mapped in the area by Wallace (1981). Needham (2005) indicates that gold in this area is typically associated with axial planar shear zones mineralized with pyrrhotite, pyrite and arsenopyrite. The host rock is typically strongly foliated/sheared magnetite bearing silicate to oxide iron formation.

Lithology

Mineralization

Mineralization Comments

Oct 10, 2006 (Mark Puumala) - The North Wottam Lake occurrence is hosted within the same metasedimentary rock sequence that hosts the Goss Lake occurrence. The reported gold occurrence is based on the results of diamond drilling carried out at this location by International Mining Corporation in 1945. An assay result of 7.2 g/t was obtained from a 13 cm wide pyrite-mineralized quartz vein intersected by DDH 2.

Alteration Comments

Dec 07, 2005 (C Salo) - Highly altered argillacous wackes - alteration consist of varying degrees of chloritization, tourmalinization, and quartz +/- feldspar veining.

Mineral Record Details

References

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:

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:

Map - Fort Hope-Lansdowne House sheet, geological compilation series, Cochrane, Kenora, and Thunder Bay districts

Publication Number: M2237 Scale: 1:253,440    Date: 1972

Author: Thurston P.C., Carter M.W., Riley R.A.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

MonoMap - Geology of the Miminiska Lake area, districts of Kenora (Patricia Portion) and Thunder Bay

Publication Number: R214 Date: 1981

Author: Wallace H.

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 Thunder Bay North Resident Geologist District Office