Ontario Geological Survey
Permanent Link to this Record:
MDI52F03NW00012
| Record Name(s) | Noranda - Pine Centre North - 1981 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-02 |
| Date Last Modified | 2022-Jul-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Bluffpoint Lake Area
Latitude: 49° 9' 9.88" Longitude: -93° 19' 28.93"
UTM Zone: 15 Easting: 476323.028 Northing: 5444486.639 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F03NW
Point Location Description: Transfer
Location Method: Conversion from MDI
Access Description: The Pine Centre North property lies between the Lakes: Bluffpoint, Harris, Pine and Straw. This area is about 60 km directly north of Fort Frances, Ontario. Access is via a Boise-Cascade logging road, branching off of the newly constructed Dryden - Fort Frances highway. The Noranda - Fairservice option is north and east of the point where this all-weather logging road passes Straw Lake. Float plane access is possible via Straw Lake. (Assessment File 52F/03 NW I-4, p.1, Noranda Exploration Co. Ltd., Kenora Resident Geologist Office)
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 14 / 52F03NW I-3 | 52F03NW0032 | 52F03NW0032 |
| 2.5244 / 52F03NW I-2 | 52F03NW0031 | 52F03NW0031 |
Province: Superior
Subprovince: Wabigoon
Terrane: Western Wabigoon
Belt: Eagle-Wabigoon-Manitou
Geological Age: Precambrian
Feb 19, 2010 (C Ravnaas) - The Fairservice Gold area lies within the Lawrence Lake Batholith, near its southern boundary where it is in contact with mafic to felsic metavolcanics. The following rock types were recognized in the field; (Note that the Legend incorporates some rock lithologies and symbols used by Edwards and Sutcliffe in their 1977 P -Series geological map). 9 -Lawrence Lake Batholith a - Mixed Contact zone b - Pink feldspathic granodiorite c - White granodiorite d -Cherty weathering chilled granodiorite e -Impure granodiorite q -Feldspar porphyry, porphyry dikes v - Aplitic and felsite dykes 6 - Mafic Intrusive Rocks a - Biotite -hornblende diorite b - Biotite -hornblende quartz diorite Granodiorite was the major rock type observed in the area. The most prevalent variety was a pink feldspathic granodiorite. This was massive, medium grained, pink to red on weathered and fresh surface, and commonly formed ridges and high relief hills. Biotite, hornblende, and occasional magnetite were the predominant mafic minerals. White granodiorite, possibly variety trondhjemite, was much less widespread, only occurring locally with no continuity, It was slightly coarser grained, and was characterized by the absence of pink feldspars. Chilled, cherty -weathering granodiorite was exposed sporadically about the grid but was most predominant near the contact with the metavolcanics. Pyrite occurs locally as euhedral disseminations. The colour on fresh surface varied from pale pink to green. Impure granodiorite was commnony fine to medium grained, and was characterized by including sometimes partially resorbed clasts of diorite, quartz diorite and pink feldspathic granodiorite. The finer grained variety often showed cherty - weathering patterns. All of the granodiorite varieties sometime carried magnetite, although this was not a universal feature. Diorite and quartz diorite were the main mafic rocks observed. Both were characterized by locally abundant magnetite and hornblende, although usually biotite was the predominant mafic mineral. Most of the exposures were of fine to medium grain size, with some coarse-grained phases observed in isolated outcrops. Intrusive dikes were almost always chilled. Mafic dikes were commonly chloritic, while ophitic and felsite dikes usually had an abundance of magnetite relative to the host rock (usually concentrated in joints). The "mixed contact zone" of Edwards was continued for this survey. It is representative of outcrops comprised of more than one lithology. The most commonly observed case was a combination of felsic (granodiorite) + mafic (diorite-quartz diorite) intrusives. Where one rock type was more dominant, it will follow the symbol for mixed contact zone; e.g., (9a, b) reflects a mixed contact zone having pink feldspathic, granodiorite as its major component. Several major lineaments transect the area. Some of the cliffs along these lineaments have zones of mylonitization near the base. An interesting feature is that nearly all of the cliffs face in a northerly direction, and most mylonite zones, were dipping steeply south to vertical. Emplacement of gold mineralization appears to be related to zones of dilation or en-echelon-type splay faults near maior fault zones. The type of rocks which carry gold in this particular area are fairly easy to recognize. There are 2 types of observed gold-bearing rocks: 1. Pyritic-sericitic-saussuritic alteration. 2. Quartz veins. (Assessment File 52F/03 NW I-2, Noranda Exploration Co. Ltd.; 1981, Kenora Resident Geologist Office)
Feb 19, 2010 (C Ravnaas) - Best assay: 0.05 opt Au over 1.5 m on surface.
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office