Ontario Geological Survey
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MDI42A11SE00035
| Record Name(s) | Umex DH M13-15 - 1988 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-20 |
| Date Last Modified | 2022-Jul-15 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Matheson
Latitude: 48° 32' 55.46" Longitude: -81° 1' 17.09"
UTM Zone: 17 Easting: 498419.515 Northing: 5377293.532 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42A11SE
Point Location Description: Transfer
Location Method: Conversion from MDI
Access Description: Highway 101 East forms the property's northern boundary and an all weather gravel road runs along the Lot 8/9 boundary line forming the property's western boundary. Direct access to the property is via a series muskeg trails, a few of which are passable by pick-up truck during the summer months.
1981, Texasgulf Canada Limited: Geophysical surveys (T-2483) 1982-1985, Kidd Creek Mines Ltd.: Airborne geophysical surveys; overburden and diamond drilling (T-2825) 1988, Falconbridge Limited / Umex J.V.: Drilling, assays (T-3389)
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-2825 / 2.5949 | 42A11SE0006 | 42A11SE0006 |
| T-2825 / 2.7563 | 42A11SE0052 | 42A11SE0052 |
| T-2483 / 2.4324 | 42A10SW0108 | 42A10SW0108 |
| T-2825 | 42A11SE0050 | 42A11SE0050 |
| T-3389 / 63.5469 | 42A11SE0042 | 42A11SE0042 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Tectonic Assemblage: Tisdale
Geological Age: Neoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Adjacent |
|---|---|---|---|---|
| Mylonite/Fault Gouge/Pseudotachylite | 2 | Shear | Contains | |
| Mafic lava flow-unsubdivided | 3 | Basalt | Adjacent |
Jul 22, 2008 (D Draper) - The sulphide mineralization occurs within strongly carbonatized, sericitized and locally silicified mafic volcanics. These zones of strong alteration occur adjacent to and within a distinct, pillowed variolitic mafic volcanic horizon. Volcanic units strike east-west and dip at 35-40 deg to the north. Tops determined primarily from graded bedding in sediments face south. Local shearing is present along flow contacts and within graphitic argillite at the mafic volcanic-sediment contact zone. (T-3389)
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Arsenopyrite | Economic | Gangue | ||||
| 3 | Pyrrhotite | Economic | Gangue |
Jul 22, 2008 (D Draper) - The stratigraphic sequence of drill hole M13-15 consists of pillowed mafic volcanics, massive leucoxene-bearing mafic volcanics, graphitic argillite and sediments. The graphitic argillite horizon is strongly sheared and intruded by several, thin grey quartz-feldspar porphyry sills. A sheared flow contact occurs between massive and pillowed mafic volcanic units at 120.5m. This shear zone is surrounded by strongly carbonatized and sericitized mafics extending from 113.0 to 134.6m. This altered zone carries 5-15% fine pyrite which locally may reach 25-30%, locally 2-3% pyrrhotite and 1-5% fine arsenopyrite. Both the pyrrhotite and arsenopyrite are concentrated in the massive mafic volcanic north of the sheared flow contact. Two gold values exceeding 500 ppb were returned from this altered zone, the best being 870 ppb over 1.0m from 117.0 to 118.0m. A second strongly carbonatized horizon was intersected from 172.7 to 199 m that carries 5-10% fine pyrite, 1-2%; fine pyrrhotite and thin quartz stringers. Three anomalous gold values greater than 500ppb were returned from this altered horizon with the best being 2.33 grams per tonne over 0.7m from 199.0 to 199.7m. Drill hole M13-16 (collared 100m east of M13-15) intersected stratigraphy almost identical to that of hole M13-15. Two altered horizons were again intersected, the first from 108.6 to 114.4m and the second from 194.7 to 217.8m. The first altered horizon carried 10-12% fine pyrite and up to 15% quartz veining; the second altered zone carried 3-5% pyrite, 1-3% pyrrhotite, locally up to 2% arsenopyrite and 3-4% quartz veining. Three gold values exceeding 500 ppb were returned from the second altered horizon with the best value being 730 ppb over 0.75 metres from 211.75 to 212.5 metres. (T-3389)
MonoMap - Geology of Matheson and Evelyn Townships, District of Cochrane
Publication Number: OFR5900 Page: 45 Date: 1994
Author: Berger B.R.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology of Matheson and Evelyn Townships, District of Cochrane
Publication Number: P3271 Scale: 1:20,000 Date: 1994
Author: Berger B.R.
Publisher Name:
Location:
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