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Globex Properties

Blackcliff Deposit - Gold JV
Malartic Township, Quebec (NTS 32D/01)

Updated August 2016

Ownership
Globex owns 50% interest in the Blackcliff property along with partner Altai Resources Inc. Globex is property manager. A 2% NSR is owed to an underlying vendor of lot 42. No ore is known to exist on lot 42.  No royalty is owed on the known Blackcliff resource.

blackcliff claim map

 

 

Cadillac Malartic Mining Camp - Globex 2016
 

Location

The Blackcliff Property consists of 3 lots situated at lots 42 to 44 inclusive, range 2, Malartic Township Quebec, approximately 5 km north-east of the town of Malartic.

blackcliff regional geology map august 2015

Access
The property is easily accessible from a point 6 km west of Malartic on paved highway 117.  A gravel all season road which services the Camflo mill can be  followed north-west for 3.5 km and then a secondary gravel road west for a further 3.5 km to the shaft area.

Topography
The area is relatively flat and has been forested previously. No important streams or wetlands are found on the property.

History (Area of N 1/2 Lots 43 and 44)

1944-1947

Vinray Malartic Mines (Mindalartic Mines Limited).  Surface prospecting and magnetic survey.  Surface diamond drilling 8,600 m in 45 holes.

1947

 

1948

Drifts lengthened 31 m to the east and west of the shaft.

1949

Property acquired by Baranouri Minerals Limited who drilled 376 m in surface drill holes.

1960

Mineral Exploration Corporation acquires property.  No work recorded.

1961

Twentieth Century Mining Company (TCMC) acquires property.

1962

TCMC drills eight holes totalling 959 m.

1963

Blackcliff Mines Ltd. acquires claims and drills 28 holes totalling 3,766 m

1964

Blackcliff drills five holes totalling 1,068 m.  By this date all the gold veins on the small south flank of the fold are known and are numbered 1 to 14.

1965-1974

No significant exploration.

1975

Blackcliff drills 3 holes totalling 599 m.

1979

Blackcliff drills 6 holes totalling 1,459 m.  The holes were drilled to check the down dip extension of veins 12 and 13 which were considered to have the most economic potential, as well as veins 9, 10, 11, and 14.

1983-1984

Blackcliff Mines Ltd. in partnership with Pinto Malartic Gold Mines Ltd. drilled 18 holes totalling 2,267 m.

1985

American Barrick Resources Corp., under an agreement with Blackcliff undertook line cutting and completed an I.P. survey.

1986

Barrick drilled 7 holes totalling 1,216 m on the north flank of the fold.

1987-1988

Essor Exploration Inc., in joint venture with Blackcliff undertook surface and underground exploration.  Surface drilling of 22 holes totalling 7,438 m defined a new zone, the #3 zone (16,273 t grading 4.61 gpt) as well as further defined the #2 zone and to a lesser extent the #1 zone. A three component headframe and support infrastructure was set up and the shaft was dewatered to the number 2 level. The number 1 vein and the first and second levels were mapped and sampled underground..

Regional Geology
The area is situated in the south central part of the Abitibi metavolcanic greenstone belt of the Superior geologic province. All the rocks are of Archean age. Alteration is of the green schist grade.

The property is in the south part of the Malartic group approximately 1 km north of the contact with Kewagama group sediments.

Abitibi rock units strike roughly east-west but at least two phases of deformation affects the rocks of the region.

Local Geology
The rock types which underlie the property are the following; mafic lavas, tuffs, agglomerates, diorite, thin bands of peridotite, granodiorite, albitite and siliceous syenite dykes.

A major east-west fold axis trends through the property.  The northern flank dips north-east while the southern flank dips south-east. The Vinray Shaft is situated at the nose of the fold.  Gold mineralization is hosted in a concordant folded quartzo-feldspathic granophyre sill or “grey diorite” approximately 91 m thick which defines the nose of the fold.

Gold mineralization is hosted in a concordant folded quartzo-feldspathic granophyre sill or “grey diorite” approximately 91 m thick which defines the nose of the fold.

The grey diorite dips 65o to 71o to the north-east and is flanked on the north-east by dacites and by tuffs to the south-west. The diorite can be followed for several km and the Camflo gold deposit occurs in proximity to the unit. The gold zone in the area of the shaft is traversed by east-west faults 1.2 m  to 3 m thick.

Economic Geology
Within the limits of the property, 14 gold zones have been discovered, several of which are discontinuous lenses in the same horizon. Ten zones are considered important. These veins are zones of silicification and pyritization accompanied by carbonatization and chloritization associated with faulting and brecciation within grey or green diorite or tuff.

The principal alteration minerals are epidote, biotite and magnetite. The zones are injected by veins of quartz less than 30 cm (1 ft) thick which are well mineralized by pyrite and pyrrhotite. Intensity of the east-west faulting varies from moderate to intense. All the gold zones are located on the south flank of the fold.

At the shaft area the gold zones are sub-vertical at surface but dip 70o north at the 61 m level.  To the east, the dip is a constant 70o north to a depth of 174 m.

In May 1988, a cut resource calculation was performed by geologist Isabelle Cadieux on the number 1, 2 and 3 veins with the following result:

Vein #1

Probable resource

13,277 t grading 8.14 gpt Au

Vein #2

Probable resource

180,820 t grading 7.83 gpt Au

Vein #3

Probable resource

16,273 t grading 4.61 gpt Au

 

Total probable resource

210,370 t grading 7.60 gpt Au

Vein #2

Possible resource

23,230 t grading 4.66 gpt Au

At the same time a resource calculation was performed by André St-Michel on the number 2 vein in a study reflecting two different mining methods. The results were as follows:

Selective Mining Method          234,400 t grading 7.28 gpt Au

Long Hole Mining Method         432,400 t grading 4.74 gpt Au

In March 1989, geologist Jean-Pierre Labelle did a geological ore resource calculation on the  number 11, 12 and 13 veins,  which are 3 sub-parallel auriferous zones within a 10 m width and a fourth auriferous vein, the number 7, located at the NW extremity of the number 11, 12 and 13 veins.

 Jean-Pierre Labelle’s resource calculation is as follows: 

Veins 11, 12, 13 & 7

 

Uncut

Cut

Probable

135,406 t

13.84 gpt Au

6.89 gpt Au

Possible

120,566 t

12.67 gpt Au

6.50 gpt Au

Total

255,972 t

13.34 gpt Au

6.71 gpt Au

 
It is unclear from source information whether Cadieux and Labelle, although labelling the vein structures differently (Cadieux - veins 1 to 3 and Labelle 7 and 11 to 13), were each referring to models of the same vein structures, each using different selection criteria.  If the zones are distinct, the accumulated Cadieux and Labelle resources estimated for the Blackcliff deposit amount to a combined, cut, geological resource of 466,342 t grading 7.11 gpt.  The resources cited for Blackcliff were prepared prior to the initiation of National Instrument 43-101 and have not been estimated or verified by a Qualified Person under the Instrument.  Globex considers these as historical estimates and as such should not be relied upon by the reader. 

In addition, numerous partially defined zones remain to be outlined as does the down dip extensions of some of the vein structures used in the calculations.

Elsewhere on the property, in the south half of lots 43 and 44, exploration was carried out by Brador Malartic Gold Mines Limited (1946 - 1 drillhole) and, Lencourt Gold Mines Limited (1958 - 6 drillholes, 1976-1978 - EM surveys).  Gold was intersected over narrow widths at shallow depths in pyritic quartz veins in tuff. Highlights are presented below;

 Hole L-1

1.52m

4.3 gpt Au

Hole L-2

0.30m

28.1 gpt Au

Hole L-3

1.22m

4.1 gpt Au

Hole L-5

0.30m

31.5 gpt Au

Hole L-6

0.15m

17.1 gpt Au

In 2007, Globex and Altai optioned the Blackcliff property to C2C Gold Corporation Inc. (option terminated in October 2009).  In 2008, C2C reported drill results of a drill program of 4,055 m targeting at the near surface extension of the #2 gold vein zone  to test the historical resource  reported in 1988.

According to C2C, numerous shallow mineralized intersections of significant grade and/or thickness were encountered including the following:

Hole

From (m)

To (m)

Width (m)

Grade (gpt Au)

BK-07-07

74.5

80.4

5.9

3.46

BK-07-09

70.8

78.2

7.4

5.89

BK-07-11

70.2

72.8

2.6

10.84

BK-07-32

56.7

63.0

6.3

5.03

The Blackcliff Property presents a very accessible and promising exploration target having attractive gold grade and mineralizaiton width.  The Blackcliff and adjacent soutern zone require further depth testing to extend the known mineralization. 

 

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Press releases related to this property

October 17, 2008
Globex: Update on exploration and prospects
(English) | (Deutsch) | (Français) |

March 19, 2008
Blackcliff property: up to 5.89 g/t au over 7.4m
(English) | (Deutsch) | (Français) |

November 21, 2007
Globex update on activities
(English) | (Français) |

November 16, 2007
Globex options its Blackcliff Gold property interest
(English) | (Français) |


Partner News related to this property

No related Partner News found.

 
 
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