Ontario Geological Survey
Permanent Link to this Record:
MDI41N02SW00028
| Record Name(s) | L Zone - 1969 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Sep-01 |
| Date Last Modified | 2022-Sep-15 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Secondary Commodities: Gold
Township or Area: Ryan
Latitude: 47° 2' 35.85" Longitude: -84° 45' 31.88"
UTM Zone: 16 Easting: 670243.543 Northing: 5212412.565 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 41N02SW
Point Location Description: stripped section
Location Method: Conversion from MDI
Access Description: 1.55 kilometres east of Highway 17, 900 metres north of the south boundary of the McDonnell Mining Location.
In 1991-92 the property containing the L Zone was explored by J.F. Paquette who completed a self-potential survey along with prospecting, and sampling. Results from the self-potential survey identified a number of anomalies. Although gold values occur with copper, there is no apparent correlation between copper and gold concerntration. In 1993, Cominco Limited optioned the property containing the L zone and compelted geological mapping, surficial geochemistry, electromagnetic and magnetic surveys. The magnetic survey identified several magnetic highs that were interpreted as geolgoical units offset by cross-cutting faults. The electromagnetic survey, designed to identify deep-seated conductors, showed no significant anomalies. Several narrow zones of low resitivity are associated with magnetic lows and with some known copper showings. Geochemical surveys using soil and humus samples identified copper anomalies over the Lzone. A broad area of above copper and gold values was identified north and sourth of an exposed felsic porphyry intrusion which is situated approximately 300 metres west of the mineral occurrences. In 2010 Cenit Corporation stripped and trenched a northern mine trend uncovering vien-type copper mineraliztion in teh form of malachite and massive chalcocite.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| SSMP-Ryan-29 | 41N02SE0107 | 41N02SE0107 |
| Cominco Ltd., M. Smith, 1994 | 41N02SE0024 | 41N02SE0024 |
| SSMP-Ryan-15 | 41N02SE2015 | 41N02SE2015 |
| SSMP-Ryan-37 | 20000006098 | 20000006098 |
Province: Southern
Supergroup: Keweenawan Supergroup
Geological Age: Late Precambrian
Jul 07, 2011 (P Beach) - A Quartz carbonate sulphide vein cutting Keweenawan mafic and felsic volcanics and conglomerates.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Chalcocite | Economic | Ore | ||||
| 3 | Malachite | Economic | Ore | ||||
| 4 | Bornite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Carbonate | Economic | Gangue |
Jul 07, 2011 (A Pace) - In 1991-92 assay for gold taken from the mineralized area returned values ranging from 1 to 7.19g/ton from 8 of the samples. Chip samples taken by Cominco in 1994 across a mineralized section of the L zone contained up to 18.500 ppb gold and 50,500 ppm copper in a chalcocite-chalcopyrite quartz-carbonate vein. In 2010, grab samples taken along the mine trend from Cenit Corporation returned assays as high as 18.7% Cu and a channel sample returned a weighted average grade of 2.17% Cu over 2 metres.
| Rank | Classification |
|---|---|
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Breccia |
| 1 | Vein |
Date: Jul 07, 2011
Geologist: A Pace
Notes: Amygdaloidal Keewenawan basalt is fractured and consistis of a series of quartz-carbonate veining. The basalt illustrates hematitic alteration displayed by the intense reddening of the basalt. The basalt is cut by a mineralized quartz-carbonate vein that consists of specular hematite, malachite, chalcopyrite and bornite. The vein follows the fracture pattern striking N358W and dipping 60 degrees to the east. Also of note is a felsic intrusion the is fine to medium grained and in close contact to the mineralized quartz-carbonate vein. The felsite is striking N358W dipping to the east 40 degrees. The felsite is exposed for approximately 8 metres and then buried into the rock pile. Another quartz-carbonate vein breccia was identified in the same area striking in a different orientation. This vein is striking N306W and dipping 70 degrees northeast. The breccia displaye large calcite crystals with malachite staining. The host basalt also illustrates a significant amount of cross-cutting viens. Many of the fractures viewed within the area displays an iron gossan mineral.
Map - Mamainse Point area, District of Algoma
Publication Number: P0554 Scale: 1:15,840 Date: 1997
Author: Giblin P.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Mamainse Point copper area, District of Algoma, Ontario
Publication Number: M1953-01 Scale: 1:12,000 Date: 1997
Author: Thomson J.E., Bonkoff E.J., Goettler G.W.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of the Mamainse Point copper area
Publication Number: ARV62-04 Page: 22 Date: 1997
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Batchawana, Algoma District
Publication Number: M2251 Scale: 1:63,360 Date: 1974
Author: Giblin P.E., Armburst G.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 104 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, Precambrian geology, Batchawana synoptic project, Mamainse Point-Pancake Bay sheet, District of Algoma
Publication Number: P3062 Scale: 1:50,000 Date: 1987
Author: Grunsky E.C.
Publisher Name: Ontario Geological Survey
Location:
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