Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E13SW00034

Record: MDI42E13SW00034

General

Commodities

Primary Commodities: Zinc, Silver

Secondary Commodities: Gold, Copper, Lead

Location

Township or Area: Elmhirst

Latitude: 49° 45' 25.3"    Longitude: -87° 45' 22.55"

UTM Zone: 16    Easting: 445528.34   Northing: 5511891.09    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42E12NE, 42E12NW, 42E13SE, 42E13SW

Point Location Description: General

Location Method: Conversion from MDI

Exploration History

1934: claims staked by Agaura Exploration Ltd., who carried out prospecting. 1971-72: Coniagas Mines Ltd. conducted mag and EM surveys, sampling, and prospecting. 1972: Company changed name to Jupiter Minerals Inc. 1984-86: Phoenix Gold Mines Ltd. carried out geological mapping, sampling, VLF-EM and magnetometer surveys, till sampling, and trenching. 1988: Placer Dome Ltd. optioned the property and carried out line cutting and a drill program of 28 DDH totalling 4212.6 m. 2007: Laurion Mineral Exploration Inc. acquired the property. 2010: Laurion conducted prospecting and sampling. 2011: Laurion drilled 3 DDH. 2012: Laurion conducted prospecting and sampling. 2013: Laurion conducted prospecting and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Eastern Wabigoon

Belt: Onaman-Tashota

Geological Age: Archean  

Lithology

Lithology Comments

Oct 29, 2018 (Therese Pettigrew) - The main feature of the property is a band of northeast-trending felsic to intermediate metavolcanics that occurs between the granodiorite stocks. Most of the quartz vein systems are found within the metavolcanics and strike subparallel to the foliation of the metavolcanics. The metavolcanics are mostly rhyolitic to andesitic flows and associated breccias, but coarse pyroclastic rocks occur intercalated with the flows. These rocks are affected by a zone of shearing and brecciation several hundred feet wide, parallel to and including, many of the prominant quartz veins (Mackasey and Wallace, 1978).

Mineralization

Mineralization Comments

Oct 29, 2018 (Therese Pettigrew) - A large number of zinc and copper showings have been found on this property. Many of these are within old trenches and pits along the gold-bearing quartz veins. Massive sphalerite occurs in small pods and veins and surrounding sheared volcanic rocks. Pyrite, chalcopyrite, and minor galena also occur with the sphalerite. In one of the new trenches observed by OGS staff in the 1970s, visible sphalerite, ranging up to about 25 percent of the sheared rock, occurred over a width of 18 m (60 feet). Copper and zinc mineralization also occurs disseminated within felsic breccia. Commonly, sphalerite and chalcopyrite occur almost to the exclusion of one another. In another recent trench, chalcopyrite averaging between 2 to 4 percent of the rhyolite breccia occurred continuously across a width of 3.6 m (12 feet). A grab sample collected by the field party from this showing was analyzed and found to contain 1.80 percent copper, 10.6 percent zinc and 0.27 ounces of gold/ton. Appreciable gold values are associated with the sulphides, and visible gold can be seen in some quartz veins. Samples collected by OGS staff along the main NE-trending vein and shear zone returned assay that ranged from 0.04-0.35% Cu, 1.55-24.6% Zn, 0.01-0.12 opt Au, 0.18-0.84 opt Ag, and 0.04% Pb (Mackasey and Wallace, 1978). Sampling done by Jupiter Minerals Inc. in 1973 in historic claim TB13399 returned the following assays: 0.05 opt Au, 0.89 opt Ag, 0.6% Cu, 6.7% Zn over 6.5 feet; 0.01 opt Au, 1.66 opt Ag, 0.28% Cu, 0.55% Zn over 6 feet; 0.005 opt Au, 0.08 opt Ag, 0.02% Cu, 2.45% Zn over 10 feet; 0.07 opt Au, 0.14 opt Ag, 0.11% Cu, 4.72% Zn over 5.5 feet; 0.59 opt Au, 0.59 opt Ag, 0.01% Cu, 9.15% Zn from a grab sample; 0.125 opt Au, 0.43 opt Ag, 0.19% Cu, 3.89% Zn over 4.5 feet; 0.03 opt Au, 6.57 opt Ag, 12.37% Zn from a grab sample; and 0.04 opt Au, 0.05 opt Ag, 0.02% Cu, 17.57% Zn from a grab sample (AFRI 42E12NE0138). Drillhole LME11-014 assayed 0.12 gpt Au, 3.5 gpt Ag, 0.06% Cu, and 7.94% Zn over 0.5 m from 29.5-30.0 m and 0.25 gpt Au, 8.4 gpt Ag, 0.28% Cu, and 2.91% Zn over 0.5 m from 134-134.5 m. Drillhole LME11-016 assayed 0.15 gpt Au, 12.9 gpt Ag, 0.01% Cu, and 4.52% Zn over 0.4 m from 57.9-58.4 m (AFRI 20000013492).

Mineral Record Details

References

Book - RES. GEOL. MIN. DEP. FILE, T. BAY

Publication Number: N/A Scale:     Date: 1996

Author:

Publisher Name:

Location:

Map - Elmhirst and Rickaby townships, Thunder Bay District

Publication Number: M2373 Scale: 1:31,680    Date: 1977

Author: Mackasey W.O., Wallace H.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology of Elmhirst and Rickaby townships, District of Thunder Bay

Publication Number: R168 Scale:     Date: 1978

Author: Mackasey W.O., Wallace H.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office