Ontario Geological Survey
Permanent Link to this Record:
MDI53B12NW00002
| Record Name(s) | Alpha-1 - 2000, Grid A1 - 1995, Monopros DDH A1-1-88 - 1988 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1995-Jun-21 |
| Date Last Modified | 2022-Jul-15 |
| Created By | |
| Revised By |
Primary Commodities: Kimberlite, Diamond
Township or Area: BMA 526 834
Latitude: 52° 41' 35.75" Longitude: -83° 46' 37.19"
UTM Zone: 17 Easting: 312336 Northing: 5841768 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 43B12NW
Point Location Description: Drill collar for A1-1-88
Location Method: Based on Assessment
Access Description: Via helicopter from Attawapiskat.
1984-86: Monopros Ltd.: regional sediment sampling program. 1986-87: Monopros Ltd.: airborne magnetic survey. 1988: Monopros Ltd. - ground magnetic survey, 1 ddh (667 ft). 1998: Monopros Ltd. - ground magnetic survey. 2001: DeBeers Canada Exploration Inc. - RC drilling ( 9 holes, 502.3 m) mini bulk sample (18605 kg (26.9 t) kimberlite material). 2006: DeBeers Canada Exploration Ltd. - airborne survey 2008: DeBeers Canada Inc. - gravity survey 2012: DeBeers Canada Inc. - DD-7-1625 m
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-3263 / 10 | 20000005131 | 20000005131 |
| T-4664 / 2.22711 | 43B12NW2005 | 43B12NW2005 |
| T-3263 / 2.11986 | 43B12NW0003 | 43B12NW0003 |
| T-6490/ 2.52840 | 20000009249 | 20000009249 |
| T-4282/ 2.19829 | 43B12NW2004 | 43B12NW2004 |
Province: Paleozoic and Mesozoic Basins
Subprovince: Hudson Bay Basin
Geological Age: Mesozoic Geochronological Age: 180 MA Geochron. Age Ref.: OFR 6019
Dec 07, 2005 (A Wilson) - In the Attawapiskat area there are both Early Jurassic and Proterozoic kimberlites. The early Jurassic kimberlites are centred at approximately latitude 52 45N and 83 50 W. These kimberlites occur along the Winisk River fault trend and occur where this fault splays toward James Bay. The kimberlite distribution pattern is elongated northwest along the Winisk River fault, parallel to the NW trend of the Proterozoic Sutton Inlier (120 km north of Attawapiskat). The Early Jurassic kimberlites lie just south of the NE trending Cape Henrietta Maria Arch.
| Rock Type | Rank | Composition | Texture | Relationship | Kimberlite-Unsubdivided | 1 | Host |
|---|
Dec 07, 2005 (A Wilson) - The kimberlite is described as a hypabyssal macrocrystic kimberlite. Limestone xenoliths have been reported throughout the kimberlite intersection. Chrome diopside-bearing xenoliths, pyroxene and garnet megacrysts and calcite veining increases with depth. Olivine is commonly found within the kimberlite, and garnet chemistry is mostly G-9. It was intersected beneath 18 feet of overburden. This kimberlite was originally classified as crater facies with lesser hypabyssal units. The 2001 drilling suggest that the kimberlite in the central area is harder and may correlate with hypabyssal facies.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Diamond | Economic | Ore | ||||
| 2 | Olivine | Economic | Ore | ||||
| 3 | Ilmenite | Economic | Ore | ||||
| 4 | Diopside | Economic | Ore | ||||
| 5 | Pyrope | Economic | Ore |
Dec 07, 2005 (A Wilson) - Fourteen macrodiamonds weighing a total of 0.335 ct were recovered from the sample. This equates to an average grade of 1.8 cpht.
Map - Known Kimberlites of Eastern Ontario
Publication Number: P3321 Scale: 1:50,000 Date: 1995
Author: Zalnieriunas R.V., Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Kimberlites of the Attawapiskat Area, James Bay Lowlands, Northern Ontario
Publication Number: OFR6019 Page: 19 Date: 2000
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Article - Alkalic rock, carbonatite and kimberlite complexes of Ontario, Superior province
Publication Number: SV04-01.018 Date: 1997
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
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