NI 43-101 Independent Technical Report Mount ... - Adex Mining Inc.

NI 43-101 Independent Technical Report Rev 02 January 22 nd , 2010
Mount Pleasant North Zone Preliminary Assessment (Project 6526-03) 13-1
SECTION 13.0 SAMPLE PREPARATION, ANALYSES AND SECURITY
13.1 General
The reader is directed to Watts, Griffis and McOuat (2008 and 2009) for details regarding the Fire
Tower Zone and North Zone sample preparation, analysis and security. Information regarding
sample preparation, analyses and security was obtained through discussions held with Trevor
Boyd and G. Kooiman and information provided from geological reports provided by Adex. It is
the authors' opinion that the sample preparation, security and analytical procedures used
conformed to generally accepted Canadian mining industry practice.
The drill core was split in the core shack building on the minesite under the supervision of the
project geologist. This building was and is locked and a security fence surrounds the minesite
buildings. Security was and is maintained on the site 24 hours, 7 days per week. All drill core from
the previous drill programs and new 2008 drill core is stored within the confines of the minesite
which are surrounded by a fence with a gate security guard which is manned 24 hours a day,
seven days a week.
All coarse rejects and pulps remain in storage in the large core shack warehouse located on-site.
The rejects have been labelled and are stacked on wooden pallets. The Mount Pleasant
Tungsten Mine (1985) "Mothball" report provided an inventory list of the stored rejects at the time
of the mine closure. However, this list has not since been updated.
The reader is directed to the WGM technical report describing sample preparation, analyses and
security by the previous operators who worked on the Property prior to June, 2006 (Watts, Griffis
and McOuat, 2006). A total of 10 of the 74 face, wall and muck samples collected by LAC from
the North Zone Access Decline were analyzed at Lakefield Research, a division of Falconbridge
Limited in 1986 (not previously reported in the 2006, 2008 WGM Technical Reports). These
samples were analyzed for tungsten, bismuth, molybdenum, copper, zinc, iron, tin, lead, arsenic
and gold. The remaining samples were analyzed at tungsten, molybdenum, arsenic, bismuth,
copper, lead, zinc and tin at the Mount Pleasant Tungsten Mine laboratory located on the mine
site. No information is known regarding laboratory sample preparation or sample security. The
various Adex sampling methods and approaches with reference to the 2008 diamond drill
program and historical core re-sampling programs is summarized below.
The majority of the analytical work was completed by SGS Mineral Services ("SGS") located in
Don Mills, Ontario (Boyd, 2008, 2006). This laboratory is an ISO/IEC 17025 accredited laboratory.
Samples, including those from the 2008 drill program, were analyzed for W, Mo, Sn, Bi, As, Zn,
Cu, Pb, and ICP-MS finish for In. The following methods were used to analyze samples at SGS:
A sample, weighing less than 3.0 kg, is first dried, crushed to 75% passing 2 mm, split to
250 g and then pulverized to 85% passing 75 micron (method code PRP89);
Ore grade analysis by sodium peroxide fusion, ICPOES finish for Cu, Pb, Zn, As, Sn, Bi, Mo
and W (method code ICP90Q);
Indium by sodium peroxide fusion ICP-MS finish using method code IC90M (detection limit
0.2 ppm to 0.1wt%). Over-limit indium analyses were completed using method code ICP90Q
after sodium fusion ore grade analyses; and,
In and Zn by sodium peroxide fusion/ICP-AES and ICP-MS finish (method code ICM90A).
Thibault & Associates Inc.
Applied Process Chemical Engineering