Exploration History

2021

A drill program is underway to test extensions to zones of higher-grade mineralization, and test areas identified during the relogging and geological modeling process as having a high potential to extend the footprint of the known mineralization. Plans to complete a 3D IP-MT to define new targets.
For further details see the 2021 Exploration Program here.

2020

Extensive field work and relogging program.
For further details see the 2020 Exploration Program page here.

2019

Aldebaran drilled 5,400 m in four diamond core holes to explore and expand the higher-grade zones to identify a higher-grade resource within the project, as well as identify and drill test several new target areas. Two of the three holes that reached their target depth intersected long intervals of higher than current resource grade material, one of which (QDM-19-41) was the discovery of a new porphyry centre.
For further details, see the 2019 Drill Program Page here.

Fall 2018

Aldebaran JV agreement with Sibanye-Stillwater to acquire the Altar project finalized.

Spring 2018

Drilling by Sibanye-Stillwater – cost sharing agreement in place with Regulus / Aldebaran.
(4,923 m, 3 holes + 1 extension of deeper drilling by Sibanye-Stillwater).
For further details, see the 2018 Drill Program page here.

2017

US$1.7 MM was spent on drilling focusing on the QDM porphyry discovered in 2016.
(5,630 m, 7 holes)

May 2017

Sibanye completed their acquisition of Stillwater, retaining a 100% interest in the Altar project.

2016

US$4 MM was spent on drilling which led to discovery of the QDM Cu-Au Radio porphyry.
(4,893 m, 8 holes)

2014 - 2015

Exploration at Altar was limited to surface mapping and the collection of baseline environmental data.

2013

Stillwater refocuses on PGM production, Altar declared a non-core asset.

2012 - 2013

A total of 38,380 m was drilled by Stillwater.
(97,981 m total drilled, 80 holes)

July 2011

Peregrine Metals was acquired by Stillwater for ~US$490 MM for its Altar project.

2005 - 2011

Peregrine expanded the property to >12,200 ha and completed drilling to define an initial mineral resource estimate at Altar Central and Altar East. (56,761 m, 146 drill holes)

2005

Peregrine, a Canadian exploration company, subsequently optioned the property from Rio Tinto.

1995 - 2004

The Altar project was first explored and drilled by CRA/Rio Tinto
(2,841 m, 7 holes).

Historical Drill Results

Altar East

Drill Hole From
(m)
To
(m)
Length
(m)
Cu
%
Au
g/t
Cu
Eq%
ALD 173 12.00 941.00 929.00 0.44 0.24 0.62
including 324.00 860.00 536.00 0.57 0.34 0.82
ALD 176 72.00 951.25 879.25 0.53 0.29 0.76
including 456.00 951.25 495.25 0.71 0.39 1.01
           

Altar Central

Drill Hole From
(m)
To
(m)
Length
(m)
Cu
%
Au
g/t
Cu
Eq%
ALD 043 210.00 1009.70 799.70 0.69 0.06 0.73
including 210.00 292.00 82.00 0.96 0.08 1.03
and 576.00 951.80 375.80 0.85 0.04 0.89
ALD 049 132.00 951.60 819.60 0.62 0.10 0.70
including 264.00 616.00 352.00 0.78 0.17 0.91
           

QDM-Radio Porphyry

Drill Hole From
(m)
To
(m)
Length
(m)
Cu
%
Au
g/t
Cu
Eq%
QDM 034 634.00 1006.00 372.00 0.59 0.46 0.95
including 840.00 940.00 100.00 1.07 0.96 1.82
including 852.00 918.00 66.00 1.32 1.22 2.27
including 882.00 918.00 36.00 1.72 1.62 2.99

Reported intervals based on cutoffs of 0.2% CuEq and 0.5% CuEq.  
CuEq = Cu% + ((Au ppm * $/oz Au + Ag ppm * $/oz Ag)/(22.0462 * 31.1035 * $/lb Cu))
CuEq metal prices used are:  Cu = US$2.25/lb, Au = US$1,100/oz and Ag = US$14/oz

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