Adex Mining Inc.

Published : March 01st, 2012

Adam Bello >>> Adex Mining Inc. >> Adex Reports Updated Mineral Resource Estimate for North Zone at

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March 1, 2012

Dear Mr. Eric Lemaire:

Re: Adex Reports Updated Mineral Resource Estimate for North Zone at Mount Pleasant.

Adex Mining Inc. (TSX-V: ADE) is pleased to announce the results of an updated National Instrument (�NI�) 43-101 mineral resource estimate for the North Zone (�NZ�) at its Mount Pleasant Mine property in New Brunswick, Canada.

A copy of the complete press release is included below for your reference. For further information, please contact us at 1-866-508-2339, or via e-mail at investorrelations@adexmining.com .

Sincerely,

Adam Bello
Media & Analyst Relations Manager
Primoris Group Inc.
Tel.: (416) 489-0092 * 1 (866) 508-2339 x 226
Fax: (416) 352-5239
E-mail: abello@primorisgroup.com


The contents of this e-mail are confidential and may be legally privileged. It is intended solely for the addressee. Access to this e-mail by anyone other than the addressee is unauthorized. If you are not the intended recipient (or responsible for delivery of the message to the recipient), you should inform the sender at the e-mail address from which this message was transmitted or call (416) 489-0092 and delete this message from your system and destroy any hard copies. Unauthorized use, disclosure, copying or distribution is prohibited and may be unlawful.


Adex Reports Updated Mineral Resource Estimate for North Zone at Mount Pleasant

Toronto, Ontario � March 1, 2012 � Adex Mining Inc. (�Adex� or the �Company�) (TSX-V: ADE) is pleased to announce the results of an updated National Instrument (�NI�) 43-101 mineral resource estimate for the North Zone (�NZ�) at its Mount Pleasant Mine property in New Brunswick, Canada.

The updated mineral resource estimate includes 12,400,000 Indicated tonnes averaging 0.38% tin (�Sn�), 0.86% zinc (�Zn�), and 64 parts per million (ppm) indium (�In�). Compared to the May 6, 2009 mineral resource estimate, this represents a 14% increase in Indicated tonnes using a cut-off grade 64% higher than in the 2009 report. Contained metal in the Indicated category within the new mineral resource estimate is 47,000,000 kilograms (kg) of tin, 107,000,000 kg of zinc and 789,000 kg of indium. Compared to 2009, contained tin is approximately the same but contained zinc and indium have increased by 34,000,000 kg and 100,000 kg, respectively.

�These are exciting results that further strengthen our confidence in Mount Pleasant,� said Patrick Merrin, Chief Operating Officer for Adex. �Our updated resource was calculated using a higher cut-off grade and we have succeeded in reclassifying a portion of our resource from Inferred to Indicated. The 2010 and 2011 drill programs along with the metallurgical testing that we have completed has given us a much better understanding of how to extract the most value from this resource. �

The updated mineral resource estimate also includes 2,800,000 Inferred tonnes averaging 0.30% tin, 1.13% zinc, and 70 ppm indium. Contained inferred metal from the new mineral resource estimate is 8,600,000 kg tin, 32,000,000 kg zinc and 198,000 kg indium.

Mineral resource and contained metal estimates are summarized below in Tables 1 and 2.

In addition to the known tin-zinc-indium resources in the NZ, the results of the 2011 drill program confirmed and expanded the extent of the high-grade tungsten-molybdenum-bismuth (WO3-MoS2-Bi) mineralization in the NZ and Saddle Zone with grades and widths similar to those being assessed at the Fire Tower Zone (�FTZ�) (News Release, Jan. 31, 2012). A follow-up drill program is planned (News Release, Feb. 16, 2012) with the purpose of further expanding and amalgamating the WO3-MoS2-Bi mineralized bodies, which were originally part of the initial 2009 NZ NI 43-101 mineral resource estimate, with those in the FTZ. This will be conducted in conjunction with the preparation of an updated NI 43-101 resource estimate and feasibility study for all of the WO3-MoS2-Bi mineralized bodies at Mount Pleasant Mine.

RESULTS

Table 1: February 2012 Mineral Resources � North Zone, Mount Pleasant Property

Mineral
Resources
Class
Tonnage
(Millions of
tonnes)
Sn Grade,
Cut
(%)
Zn Grade,
Cut
(%)
In Grade,
Cut
(ppm)
Indicated 12.4 0.38 0.86 64
Inferred 2.8 0.30 1.13 70

1. Resources were estimated using composites within a Block Model with block dimensions of 5x5x5m and using an inverse distance squared grade interpolation method. Top cuts were applied to Sn, Zn and In assays before compositing. A cut-off of US$75 Gross Metal Value (�GMV�) was applied and a recovery of 100% is assumed;
2. Mineral resources which are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental, permitting, legal, title, socio-political, marketing, or other relevant issues;
3. The quantity and grade of reported inferred mineral resources in this estimation are uncertain in nature and there has been insufficient exploration to define these inferred resources as an indicated or measured mineral resource and it is uncertain if further exploration will result in upgrading them to an indicated or measured mineral resource category; and
4. The mineral resources in this press release were estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions and adopted by CIM Council November 27, 2010.

The contained metal within the new mineral resource estimate is:

Table 2: Contained Metal, North Zone Mount Pleasant Property (Capped*)

Mineral Resources Class Contained Sn (kg) Contained Zn (kg) Contained In (kg)
Indicated 47,000,000 107,000,000  789,000
Inferred 8,600,000 32,000,000  198,000

 

 


1. Top cuts of 3% Sn and 4% Sn were applied to Sn assays before compositing; top cuts of 5% Zn and 8% Zn were applied to Zn assays before compositing and top cuts of 500 ppm In and 600 ppm In were applied to In assays before compositing. The top cuts applied varied according to the domain. A cut-off of US$75 GMV was applied and a recovery of 100% is assumed; and
2. Figures may not total due to rounding.

MINERAL RESOURCE STATEMENT

The updated mineral resource estimates have been prepared on behalf of Watts, Griffis and McOuat Limited, Consulting Geologists and Engineers of Toronto (�WGM�) by WGM Senior Geological Associate John Reddick, M.Sc., P.Geo., of Reddick Consulting Inc. (�RCI�) and Mohan Srivastava, M.Sc., P.Geo., of FSS Canada Consultants Inc., all of whom are independent of Adex.

A total of 27,527 samples in 640 Diamond drill holes, representing approximately 76,000 metres of drilling, were used for the estimate. The drilling includes underground and surface holes completed from the 1950s through 2011. Of these, 81 drill holes from surface totalling 19,027 metres were completed by Adex from 1996 to 2011. The mineral resource is constrained by wireframes of the favourable host lithologies. Domains were modelled that reflected the different nature of the Sn, Zn and In mineralisation. Metal grades were interpolated into 5-by-5-by-5-metre blocks using an inverse distance squared (ID2) estimation method.

Metal prices of US$8.33 per pound Sn, $0.91 per pound Zn, and $600.00 per kilogram for In, based on the three-year trailing average, were used to estimate a combined Gross Metal Value (�GMV�) of US$75 to establish the cut-off value for blocks. The GMV of US$75 is equal to a Sn equivalent cut-off grade of 0.41 wt%, which is 64% higher than the Sn equivalent cut-off grade of 0.25 wt% Sn used in the initial NI 43-101 resource estimate for the NZ completed in 2009. The higher cut-off was chosen based upon the results of the 2010 Preliminary Economic Assessment completed for the NZ (filed on SEDAR), which estimated total operating costs ranging from US$64 to $109 per tonne and identified Sn, In and Zn as potentially economic extractable metals for the deposit. In-house data from Adex and technical data from Reddick Consulting Inc for similar deposits were also used to derive the cut-off value.

Mineral resources were classified as Indicated in each domain if:
a) there were a minimum of six composites from at least two different holes available within the search ellipse for each block estimated; and
b) there were a minimum of two octants with samples available for each block estimated.
Mineral resources were classified as Inferred if at least two composites were found within the search ellipse. For both classes, the longest search direction was 35m and the shortest 20m. The search ellipse was determined from variography analyses and composites contributing to block grades were constrained by the wireframes.

Assay grades were composited to nominal 3-m lengths prior to resource estimation. Unsampled intervals were included in the composites at nil grades. To date all samples have been tested for Sn and Zn, while only 34% have been tested for In. The applied methodology provides a conservation approach for the estimation of the In within the resource. Top cuts of 4% Sn, 5% Zn and 500 ppm In were applied for the Endogranite subzone (�100�) domain and top cuts of 3% Sn, 8% Zn and 600 ppm In were applied outside of the Endogranite subzone domain. The top cuts were established on the basis of statistical analysis and were applied to the assays before calculation of composite grades. A GMV cut-off of US$75/tonne is derived from the value of Sn, Zn and In for each block and the GMV cut-off is based on the assumption that the deposit is of a potential size and nature to allow for possible bulk mining methods.

A copy of the full mineral resource estimate will be available in a NI-43-101-compliant report on the SEDAR website within 45 days of this press release. That report will be prepared by Michael Kociumbas, B.Sc., P.Geo. and Vice-President of Watts, Griffis and McOuat Limited, Steve McCutcheon, Ph.D., P.Geo., of McCutcheon Geo-Consulting, John Reddick, M.Sc., P.Geo., of Reddick Consulting Inc., and Mohan Srivastava, M.Sc., P.Geo., of FSS Canada Consultants Inc. The mineral resource estimates, which are effective today, were completed by John Reddick, M.Sc., P.Geo., of Reddick Consulting Inc. and Mohan Srivastava, M.Sc., P.Geo., of FSS Canada Consultants Inc., and are based on geological interpretations and data supplied by the Company. Michael Kociumbas, John Reddick and Mohan Srivastava are �independent qualified persons� for the purposes of NI 43-101 Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators and have verified the mineral resource data disclosed in this release. Steve McCutcheon, Ph.D., P.Geo., of McCutcheon Geo-Consulting and an �independent qualified person� for the purposes of NI 43-101 Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators, has verified the sampling procedures and QA/QC data delivered to WGM and is of the opinion that the data are of good quality and suitable for use in the mineral resource estimates.

McCutcheon, Srivastava and Reddick approved the disclosure of the technical information contained in this press release. This release has also been reviewed by Adex�s Chief Operating Officer Patrick Merrin, P. Eng.

ABOUT ADEX

Adex Mining Inc. is a Canadian junior mining company with an experienced management team. The Company is focused on developing its flagship Mount Pleasant Mine property, a multi-metal project that is host to promising tungsten-molybdenum and tin-indium-zinc mineralization. Located in Charlotte County, New Brunswick, the property is situated approximately 80 km south of Fredericton, the provincial capital, and 65 km from the United States border. The common shares of Adex trade on the TSX Venture Exchange under the stock symbol �ADE.�

No securities commission or regulatory authority has approved or disapproved the contents of this press release.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this press release.


CONTACT INFORMATION

Adex Mining Inc.
Linda Lam Kwan
Interim President, Chief Executive Officer and Director
1-866-508-2339 (ADEX)
Email: investorrelations@adexmining.com 
Website: www.adexmining.com 

FORWARD-LOOKING STATEMENTS

Certain statements in this press release may constitute "forward-looking" statements which involve known and unknown risks, uncertainties and other factors which may cause actual results, performance or achievements of Adex, its subsidiary or the industry in which they operate to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. When used in this press release, the words "estimate", "believe", "anticipate", "intend", "expect", "plan", "may", "should", "will", the negative thereof or other variations thereon or comparable terminology are intended to identify forward-looking statements. Such statements reflect the current expectations of the management of Adex with respect to future events based on currently available information and are subject to risks and uncertainties that could cause actual results, performance or achievements to differ materially from those expressed or implied by those forward-looking statements. These risks and uncertainties are detailed from time to time, including, without limitation, under the heading "Risk Factors", in reports filed by Adex with the Alberta, British Columbia and Ontario Securities Commissions which are available at www.sedar.com and to which readers of this press release are referred for additional information concerning Adex, its prospects and the risks and uncertainties relating to Adex and its prospects. New risk factors may arise from time to time and it is not possible for management to predict all of those risk factors or the extent to which any factor or combination of factors may cause actual results, performance and achievements of Adex to be materially different from those contained in forward-looking statements. Although the forward-looking statements contained in this press release are based upon what management believes to be reasonable assumptions, Adex cannot assure investors that actual results will be consistent with these forward-looking statements. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results.

The forward-looking information contained in this press release is current only as of the date of the press release. Adex does not undertake or assume any obligation to release publicly any revisions to these forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events, except as required by law.



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Adex Mining Inc.

EXPLORATION STAGE
CODE : ADE.V
ISIN : CA0069032070
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Adex Mining Inc. is a tin and zinc development stage company based in Canada.

Adex Mining Inc. holds various exploration projects in Canada.

Its main exploration properties are MOUNT PLEASANT MINE and AYLMER LAKE EAST in Canada.

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