Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI32E05NE00004

Record: MDI32E05NE00004

General

Mineral Record Identification
Record Name(s)	A8-3200 Vein System - 2013, Mikwam - 1986, Noranda - Pamorex J.V. - 1986, Area B - 1986, Newmont - Csa J.V. - 1986
Related Record Type	Simple
Related Record(s)
Record Status	Developed Prospect With Reported Reserves or Resources
Date Created	1986-Jul-22
Date Last Modified	2023-Aug-16
Created By
Revised By

Commodities

Primary Commodities: Gold

Secondary Commodities: Silver, Copper, Zinc

Location

Township or Area: Noseworthy

Latitude: 49° 29' 32.71" Longitude: -79° 43' 30.66"

UTM Zone: 17 Easting: 592319.45 Northing: 5482979.08 UTM Datum: NAD83

Resident Geologist District: Kirkland Lake

NTS Grid: 32E05NE

Point Location Description: Area of mineralization in Kelso and Harnois (2013)

Location Method: Conversion from MDI

Access Description: There is one gravel road, running northeast-southwest located 18 km north of the Property, which connects to the north-south running, paved Road 652 that is located west of the Property. An old logging camp that used to be operated by Tembec is located on the north side of the gravel road. There is a 22 km logging trail (�Tembec trail�) going from the Tembec Camp to the 2006 Mikwam drilling area. The trail connects to the gravel road at 580269E 5498978N (UTM NAD83) and runs southeast to the drilling area where it connects (592093E 5483056N; UTM NAD83) to an east-west logging trail.

Exploration History

pre 2006: information not readily available Exploration by Loydex Resources and Noranda Exploration. 1990: Newmont Exploration of Canada completed 9 holes totalling 2326 m. 2006: ESO Uranium completed an 18 hole 6383 m diamond drilling program. 15 of the 18 holes had intersections above the MDI threshold for Au. Holes were drilled around the prospect. Assay results to 18 g/t Au (ESO-06-14) 2008: ESO completed airborne mag and VLF-EM surveys. 2010: ESO completed a geoch survey 2011: ESO completed linecutting 2012: ESO completed ground mag and VLF-EM surveys

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
KL-5669	20000001719	20000001719
KL-1988	32E12SE0045	32E12SE0045
KL-1988	32E12SE0087	32E12SE0087
KL-1988	32E12SE0040	32E12SE0040
KL-1988	32E12SE0083	32E12SE0083
KL-1988	32E12SE0084	32E12SE0084
KL-1988	32E05NE0032	32E05NE0032
KL-1988	32E12SE0066	32E12SE0066
KL-6025	20000003214	20000003214
KL-6367	20000005885	20000005885
KL-6613	20000006946	20000006946
KL-6650 / 2.51624	20000007232	20000007232
KL-1988	32E12SE0047	32E12SE0047
KL-2030 / 2.10107	32E12SE0065	32E12SE0065
KL-1655	32E12SE0086	32E12SE0086

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Geological Age: Archean

Geology Comments

Jun 20, 2013 (D Guidon) - From Kelso and Harnois (2013) The Mikwam Property lies in the northern portion of the Precambrian Abitibi Sub-province (Abitibi Greenstone Belt) of the Superior Province of the Canadian Shield. The specific subdivision of the Abitibi Sub-province in which the Property is situated is the Harricana-Turgeon Belt. The Harricana- Turgeon Belt hosts polymetallic deposits and several gold deposits. Although the widespread occurrences of thick overburden and the lack of outcrop exposures on both sides of the provincial boundary present an obstacle to geologic mapping, the small number of outcrops combined with intensive exploration activities during the past three decades (mostly on the Quebec side) have provided sufficient information for a regional synthesis. The Harricana-Turgeon Belt consists of the granitic intrusions, surrounded by felsic to mafic metavolcanic rocks, metasediments and minor mafic to ultramafic intrusions. The Mistawak Batholith is the largest of the granitic intrusions and is composed of quartz monzonite and granodiorite. Johns (1982) has summarized the regional geology of the Harricana-Turgeon Belt in the Mikwam area as follows: “North of the Mistawak Batholith, the base of the E-W striking metavolcanic sequence is a thick section of mafic to intermediate flows with minor interbedded felsic to intermediate tuffs. Overlying these units are felsic to intermediate metavolcanics with minor interbedded mafic to intermediate metavolcanics and clastic metasediments. These metavolcanics are thin and disappear to the west. The overlying clastic sediments are conformable with the metavolcanics. These clastic metasediments contain iron-rich chemical metasediments. The metavolcanics and metasediments were intruded by felsic to intermediate plutons and minor mafic intrusions. The last magmatic event was the emplacement of Early Proterozoic diabase dikes which intrude all rock types and cross major structures.” The metavolcanic and metasedimentary rocks have undergone low pressure, contact and regional metamorphism of greenschist and lower amphibolite facies. The metamorphic event occurred between 2.6 and 2.7 Ga. The Casa Berardi Deformation Zone (CBDZ) is a major, subvertical regional structure 4 to 6 km wide and at least 60 km in length. The CBDZ is crosscut at low angle by the Casa Berardi fault which is a brittle, schistose zone 0.5 to 5 m thick. The position of the CBDZ seems to be controlled by contrasts in regional competence (Pilote et al., 1990). The main characteristics of the CBDZ, summarized by Pilote et al. 1990, are as follows: a generally high level of deformation, with bands of strongly deformed rock juxtaposed with lens that are only weakly deformed; the repetition of lithologies at all scales by asymmetric folds; the occurrence of numerous spaced shears of variable intensity; a oliation characterized by preferential orientation of phyllosilicates and flattened fragments and commonly exhibits a mylonitic aspect; the occurrence of ankerite rich bands; a stretching lineation (defined mainly by elongated fragments in brecciated units) which plunges from 70º to 80º toward the WSW.

Lithology Comments

Jun 20, 2013 (D Guidon) - From Kelso and Harnois (2013) The area of the Property is underlain primarily by mafic metavolcanic, felsic metavolcanic, metasedimentary and felsic intrusive rocks. Researchers have divided the geological units into the following three domains, separated by two major faults that are most likely part of the CBDZ fault system: 1. Northern Domain: consists of thick sequences of mafic to intermediate flows and pyroclastics and turbiditic sediments separated by prominent unit of oxide iron formation. The metamorphic grade is more elevated than units to south, generally being in the amphibolite facies. The Northern Domain lies mostly just north of the Property boundary. 2. A8 Domain: consists of a diverse assemblage of interbedded turbiditic sediments (greywacke, argillite, and conglomerate), intermediate to felsic pyroclastics with minor flows, chert, intrusive porphyry, and minor oxide-sulphide iron formation. This assemblage strikes in northeast-southwest direction and dips generally sub-vertically. Drill core evidence demonstrates that the entire area has been subjected to a strongly developed folding event. Fold noses are observed in the fine clastic sediments throughout the A8 Area, and may be small-scale parasitic folds on larger scale folds. Zones of extremely blocky core, poor recoveries, fault gouge, and shear intervals hint at the presence of multi-stage deformation. The most well defined and continuous zone of alteration and mineralization is developed within central portion of the A8 Domain. A broad zone of ankerite alteration, strong schistosities and abundant brittle-ductile faulting, greater than 200m in width, has been defined by drilling along a strike length of 7km. Gold mineralization occurs in quartz-carbonate veins and silicified zones which carry significant amounts of pyrite and arsenopyrite. 3. Southern Domain: consists primarily of mafic volcanic with minor ultramafic rocks and intercalations of graphitic and sulphidic argillite. The northern limit of the domain is marked by the Southern iron formation. The iron formation is best developed in Bradette Township, east of the Property, where it occurs as a distinctive jasper-magnetite Iron Formation. All three domains trend in an east-northeast direction across the Property. Their geometry is complicated by a series of northwest trending transverse structures. The A8 Domain contains the 3200 Vein area, which has been the focus of past and present drill campaigns. This area is a zone of quartz flooding and sulphidization (mainly pyrite and arsenopyrite) at or near the contact of chloritic iron formation and either argillite (hanging wall) or conglomerate (footwall).

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type
1	Pyrite	Economic	Gangue
2	Pyrrhotite	Economic	Gangue
3	Quartz	Economic	Gangue
4	Carbonate	Economic	Gangue
5	Sericite	Economic	Gangue
6	Arsenopyrite	Economic	Gangue

Mineralization Comments

Jun 20, 2013 (D Guidon) - From Kelso and Harnois (2013) Recent exploration on the Mikwam Property concentrated on the A8 3200 vein system that consists of a zone of quartz flooding, silicification, and sulphidization which lies at or near the contact of chloritic iron formation and either argillite or conglomerate. The zone is observed to locally crosscut lithological boundaries. Discrete quartz veins do occur in this zone, but assay results indicate these are lower in grade than the highly sulphidized sections. Five to 50% medium to coarse grained cubic pyrite and 1 to 5% coarse grained arsenopyrite within a highly sericitized, quartz flooded matrix comprises the bulk of the zone that tends to carry higher gold grades. The best gold values tend to be associated with pyrite containing vugs. In other instances, however, pyrite has been reported as an indicator of lower gold values (<3 g/t). The A8 3200 vein system strikes approximately east-west, and dips steeply north but appears to change direction to strike approximately 115° to 145° near the middle of the zones due to folding. A steep moderate westerly plunge is indicated for the zone. Several additional styles of mineralization are present also across the Property. Minor to 1% fine grained disseminated pyrite is ubiquitous in most lithologies. Quartz-carbonate and quartz-ankerite stringers and veinlets, parallel to or cutting foliation are also common. Minor amounts of brown or black tourmaline are commonly observed in these stringers and veinlets. At least two generations of veining appear to be present: some sets exhibit boudinage texture and folding while others are significantly less deformed. Coarse-grained cubic and nodular pyrite is common in the graphitic argillite units. Locally, the nodular pyrite forms semi-massive sections. Semi-massive bedded pyrite up to 30cm thick also occurs in the graphitic argillite and carries gold values up to 1.573 g/t Au over 0.3 m. Wide sections of fine grained stringer and disseminated pyrite and pyrrhotite within felsic lapilli-tuffs have been observed. Sections of semi-massive to massive pyrite-pyrrhotite veins also occur. While the pyrite has a vuggy texture similar to that observed in the A8 3200 vein system, samples were reported to return insignificant gold values.

Mineral Record Details

Reserves or Resources Data
Zone	Year	Category	Tonnes	Reference	Comments	Commodities
Mikwam	2013	Inferred Mineral Resource	1810000	Baker, Harnois and Magyarosi (2013)	1.0 g/t cut-off	Gold 2.34 g/t

References

Book - Independent technical report, Mikwam property, Noseworthy Township, Ontario, Canada

Publication Number: Date: 2013

Author: Kelso, I. and Harnois, L.

Publisher Name: SEDAR

Location: Kirkland Lake RGP office

Book - Northern Miner 85-06-20, Discoveries, p. B12

Publication Number: NMINER Date: 1985

Author:

Publisher Name: Northern Miner

Location:

Compend - Report of activities, 1985, Regional and Resident Geologists

Publication Number: MP128 Page: 180,181,184 Date: 1986

Author: Kustra C.R.