Ontario Geological Survey
Permanent Link to this Record:
MDI31M12NE00007
| Record Name(s) | NDN-1 - 1994, Troika - 1994 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2003-Nov-18 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Diamond, Kimberlite
Township or Area: Casey
Latitude: 47° 38' 44.3" Longitude: -79° 31' 6.98"
UTM Zone: 17 Easting: 611258.902 Northing: 5277978.827 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M12NE
Point Location Description: Diamond drill hole
Location Method: Other Literature
Access Description: The kimberlite is about 500m east of the Ontario-Quebec border. For PSMP purposes, the pipe location has deemed to be on the border.
The pipe was discovered in APril 1994 by KWG Resources Limited. The exploration was follow-up to interpretation of geophysical data. The discovery was significant because this was the first pipe discovered locally with a negative magnetic feature. The discovery greatly expanded the potential number of targets in the Timiskaming Structural Zone. Eight diamond drill holes were completed on the pipe. Testing of a 22 kg sample recovered 22 microdiamonds.
Province: Superior
Geological Age: Mesozoic
Dec 07, 2005 (D Guidon) - The pipe probably intrudes sedimentary rocks of the Pontiac Subprovince of the Superior province. It appears to be near a splay or subparallel fault to the Blanche River Fault, part of the Lake Timiskaming Structural Zone.
Dec 07, 2005 (G Grabowski) - Hypabyssal kimberlite with crustal xenoliths.
| Rock Type | Rank | Composition | Texture | Relationship | Kimberlite-Unsubdivided | 1 | Fine To Medium Grained, Pelletal | Host |
|---|
Dec 07, 2005 (D Guidon) - The following is from Sage (1996). The core was displayed a hypabyssal kimberlite containing crustal xenoliths. In addition to the usual, generally less than 15 cm Paleozoic limestone and crustal rock clasts, large blocks up to a metre or more of fine grained metasiltstone with former andalusite porphyroblasts were present. These are probably Pontiac group metasedimentary rocks. The xenoliths and large metasiltstone blocks did not display a high degree of alteration. In thin section, the kimberlite can be described as fine to medium grained inequigranular, seriate allotriomorphic with pelletal texture.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Diamond | Economic | Ore | ||||
| 1 | Phlogopite | Economic | Gangue | ||||
| 2 | Olivine | Economic | Gangue | ||||
| 3 | Carbonate | Economic | Gangue | ||||
| 4 | Serpentine | Economic | Gangue | ||||
| 5 | Diopside | Economic | Gangue | ||||
| 6 | Chromite | Economic | Gangue |
Dec 07, 2005 (D Guidon) - The following is from Sage (1996). Fresh mineralogy is common and in thin section, this kimberlite appears similar to the Guigues and N.D.N. No. 2 kimberlite pipes. Lithic clasts comprise from 5 % to 20 % of the rock. Phlogopite occurs as tabular, subhedral grains and olivine is present as round, anhedral grains displaying varying degrees of alteration to chlorite, carbonate and serpentine. Minor to trace amounts of garnet, clinopyroxene and opaques were present in thin section. The matrix consisted of a very fine grained mixture of carbonate, serpentine and chlorite. In heavy mineral concentrates, Cr-diopside is rare and chromite is not common. One small Iherzolite xenolith was recovered from the core. The metasiltstone xenolith can be described as fine grained inequigranular, granoblastic to porphyroblastic in texture. Biotite makes up 40 % of the metasiltstone and displays a greenish brown pleochroism. The biotite displays a strong preferred orientation which imparts a schistosity to the rock. The quartz is anhedral and forms a part of an interlocking mosaic with untwinned plagioclase. Andalusite has been replaced by sericite mica and the identification of former andalusite is based on the morphology of the sericite clots. Within the clots, sericite is randomly oriented and is present in only trace amounts in the enclosing rock.
| Rank | Classification |
|---|---|
| 1 | Diatreme |
| Rank | Characteristic |
|---|---|
| 1 | Pipe |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Cylindrical |
Date: May 07, 2004
Geologist: D Guidon
Notes: Core of the NDN-1 pipe was examined during the 8th Internation Kimberlite Conference on July 4, 2004. Photos: 730387-730393 - photos of core showing diatreme breccia.
Map - Firstbrook and parts of surrounding townships, Timiskaming District
Publication Number: M2474 Scale: 1:31,680 Date: 1985
Author: Johns G.W., Van Steenburgh R.
Publisher Name: Ontario Geological Survey
Location:
Publication - The Seed and Triple B kimberlites and associated glacial sediments, Lake Timiskaming, Ontario
Publication Number: GSC OF 4492 Date: 2003
Author: McClenaghan, M.B. and Kjarsgaard, B.A.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/214645
MonoMap - Kimberlites of the Lake Timiskaming Structural Zone
Publication Number: OFR5937 Date: 1996
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Kirkland Lake Resident Geologist District Office