Ontario Geological Survey
Permanent Link to this Record:
MDI31M05NE00219
| Record Name(s) | Peddie - 1995 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2003-Nov-14 |
| Date Last Modified | 2022-May-17 |
| Created By | |
| Revised By |
Primary Commodities: Kimberlite
Township or Area: Bucke
Latitude: 47° 26' 32.2" Longitude: -79° 40' 55.89"
UTM Zone: 17 Easting: 599356.671 Northing: 5255156.56 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05NE
Point Location Description: GSC OF3775 PIT #3
Location Method: Field Visit with GPS
Access Description: The pipe underlies a swampy area associated with a beaver pond on the Peddie farm south of highway 558.
The pipe was discovered by Consolidated Pine Channel by diamond drilling a circular magnetic anomaly on an airborne survey. The kimberlite is a positive, oval-shaped isomagnetic contour pattern about 100 by 150 m in diameter. Two diamond drill holes totalling 200.25 m were completed to test the anomaly.
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Geological Age: Mesozoic Geochronological Age: 153.6+/12.4 MA Geochron. Age Ref.: EPSL 178
Dec 07, 2005 (D Guidon) - The Peddie pipe is located about 1.2 km northeast of the northwest-trending Cross Lake Fault, part of the Lake Timiskaming Structural Zone. The pipe intrudes relatively flat lying Proterozoic Nipissing diabase sill. Archean age Timiskaming Formation conglomerates are located to the north of the diabase. Gowganda Formation sedimentary rocks ly to the southwest of the Cross Lake Fault.
| Rock Type | Rank | Composition | Texture | Relationship | Kimberlite-Unsubdivided | 1 | Monticellite | Hypabyssal Macrocrystic | Host |
|---|---|---|---|---|
| Gabbroid-Unsubdivided | 2 | Diabase | Near |
Dec 07, 2005 (D Guidon) - The following description is from Kjarsgaard, B.A. (2003). The Peddie kimberlite is classified as a hypabyssal phlogopite macrocrystic monticellite kimberlite. The kimberlite contains quite unusual 'eggs' (10-20 cm in size) consisting of >90 modal% olivine. These 'eggs' are not mantle dunite xenoliths, but are autoliths of crystallinoclastic kimberlite. The kimberlite has been eroded by preglacial and glacial processes. The upper surface of the kimberlite has undergone varying degrees of post-glacial weathering, leaving most of the upper surface friable and soft. A portion of the upper surface, however, is unweathered, hard kimberlite and displays what may be the first reported striated kimberlite surface.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Olivine | Economic | Gangue | ||||
| 2 | Ilmenite | Economic | Gangue | ||||
| 3 | Pyrope | Economic | Gangue | ||||
| 4 | Spinel | Economic | Gangue | ||||
| 5 | Diopside | Economic | Gangue |
Dec 07, 2005 (D Guidon) - The following conclusions are from McClenaghan (1999) GSC OF 3775. Relative abundance of kimberlite indicator minerals in the Peddie kimberlite is: olivine W Mg-ilmenite W pyrope > Cr-spinel > Cr-diopside. This relative abundance is different from other kimberlites in the Lake Timiskaming field and can be used to distinguish the Peddie dispersal train from the relatively Cr-Ti-pyrope and Cr-diopside-rich dispersal trains from the Bucke and Gravel kimberlites. Olivine abundance in kimberlite is a reflection of its dominance as the most abundant mineral in mantle peridotites (occurring as xenoliths in kimberlite) and as the most important phenocryst phase in kimberlite. The high abundance of olivine in the Peddie pipe is due to it being a hypabyssal kimberlite with fresh (i.e. non-serpentinized) olivine. Olivine in the Peddie kimberlite has survived both in-situ weathering of the kimberlite and subsequent glacial transport. Unlike tropical and arid terrains of South Africa and Australia, olivine is an excellent kimberlite indicator mineral in glaciated terrain. Mg-ilmenite in the Peddie kimberlite is characterized by extremely high MgO (most between 9 and 18 wt.%) similar to other kimberlites nearby (Gravel, Bucke) but unlike the Kirkland Lake kimberlites 80 km to the north. The Lake Timiskaming kimberlites, including the Peddie kimberlite, have ilmenites with distinct Crz03 versus MgO signatures which can be used to distinguish between Mg-ilmenite grains in till derived from the Peddie kimberlite and other kimberlites in the area. The diamond potential of the Peddie kimberlite is low: only two out of 514 Cr-pyropes are subcalcic garnets related to harzburgitic/dunitic assemblages, and no eclogitic garnet were found.
| Rank | Classification |
|---|---|
| 1 | Diatreme |
| Rank | Characteristic |
|---|---|
| 1 | Pipe |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 153.6 MA | EPSL 178 |
Date: Apr 07, 2004
Geologist: D Guidon
Notes: Visited as part of 8th International Kimberlite Conference field trip on July 3, 2003. Photos: 730370-730375. Hand sample 03307. Two pits were excavated in the overburden to expose the pipe. The top portion of the pipe is very friable.
Map - Township of Bucke, District of Timiskaming, Ontario
Publication Number: M1956A Scale: 1:15,840 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Kimberlites of the Lake Timiskaming Structural Zone: Supplement
Publication Number: OFR6018 Date: 2000
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Book - MINERALOGY AND GEOCHEMISTRY OF THE PEDDIE KIMBERLITE, AND ASSOCIATED GLACIAL SED
Publication Number: OF3775 Date: 1999
Author: McClenaghan, M.B. et al
Publisher Name:
Location:
Publication - Indicator mineral content and geochemistry of till around the Peddie kimberlite, Lake Timiskaming, Ontario
Publication Number: GSC OF 4262 Date: 2002
Author: McClenaghan, M.B.; Kjarsgaard, B.A.; Kjarsgaard, I.M
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/213271
Book - TIMING OF EASTERN NORTH AMERICAN KIMBERLITE.., EARTH PLAN. SCI.L V178, P.253-268
Publication Number: ESPL 178 Date: 2000
Author: Heamna, L.M. and Kjarsgaard, B.A.
Publisher Name:
Location:
Book - NORTHERN ONTARIO FIELDTRIP GUIDEBOOK, 8TH INTERNATION KIMBERLITE CONFERENCE 46P
Publication Number: 8IKC Date: 2003
Author: Kjarsgaard, B.A.
Publisher Name:
Location:
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