Celtic Minerals Ltd. Provides Updates to Previously Disclosed Historical Resource Estimates
07 December 2010 - 5:40AM
PR Newswire (Canada)
CALGARY, Dec. 6 /CNW/ -- Shares Outstanding: 80,192,676 CALGARY,
Dec. 6 /CNW/ - Celtic Minerals Ltd. (the "Corporation" or
"Celtic"), provides updates to its previously disclosed historical
resource estimates arising from a review of the Corporation's
previous continuous disclosure. Technical Report The Corporation is
pleased to announce that it is in receipt of an independent
technical report (the "Technical Report"), prepared in accordance
with National Instrument 43-101 - Standards of Disclosure for
Mineral Projects ("NI 43-101"), relating to the Great Burnt Lake
Property, Newfoundland, Canada (the "Great Burnt Lake Property")
prepared by Mercator Geological Services Limited ("Mercator") and
dated July 26, 2010. The Technical Report was filed concurrently
with this press release and is available for viewing under the
Corporation's profile at www.sedar.com. The Great Burnt Lake
Property is located in south-central Newfoundland, about 75
kilometres northnorthwest of the village of St. Alban's, east of
Great Burnt Lake within NTS Map Sheet 12A/08 and centred at about
563,513 mE and 5,358,966 mN UTM (NAD27 Projection, Zone 21). Access
to most of the southern licence can be gained from St. Alban's on
an all weather gravel road maintained by Newfoundland Hydro. A
locked gate limits access north of the North Salmon Dam at Great
Burnt Lake and permission is obtained from the local Hydro office
in St. Alban's. Access to the northern licences is limited to ATV
trails, helicopter and float plane. The Great Burnt Lake Property
consists of 234 contiguous unpatented claims covering 58.5 square
kilometres in seven mineral licences. The Great Burnt Lake Property
has an extensive exploration history and this work confirms the
presence of volcanogenic massive sulphide ("VMS") style base metal
and/or gold mineralization, and that the region contains a number
of exploration targets for gold and base metal mineralization. Work
by the Corporation has included geological mapping, airborne
electromagnetic ("EM"), ground based EM, induced polarization and
magnetometer surveys, soil geochemistry surveys and diamond
drilling since 1999. This work and the work of others show that the
VMS deposits occur within mafic volcano-sedimentary lithologies of
the Cold Spring Pond Formation of the Baie d'Espoir Group. Sulphide
mineralization is in the form of pyrrhotite-rich bands,
net-textured fabrics and massive zones with associated chalcopyrite
and minor locally associated sphalerite and gold. The presence of
two small zones of mineralization and numerous showings of
sulphides in drill core and outcrop of the volcano-sedimentary
stratigraphy between and beyond the known deposits indicate that
hydrothermal activity accompanied the volcanism and the whole of
the volcanic belt should be considered as prospective. The
Technical Report was prepared by Peter Webster, P.Geo. and Isobel
Wolfson, P.Geo. of Mercator on behalf of the Corporation. Peter
Webster is an independent qualified person and is responsible for
all items in the Technical Report. Isobel Wolfson is a qualified
person who is not independent from the Corporation as the majority
of Ms. Wolfson's income is derived from her engagement as a
consultant of the Corporation. Updates to Previously Disclosed
Historical Resource Estimates Great Burnt Lake - Historical
Resource Estimate The Great Burnt Lake - South Pond property is
located in Central Newfoundland (NTS 12A/08), 75 km northwest of
the community of St. Albans. The property consists of 7 licenses
which are comprised of 234 claims, totalling 58.5 km(2). The Great
Burnt Lake Property consists of the Great Burnt Lake Deposit and
the South Pond Deposit. Great Burnt Lake Deposit The Great Burnt
Lake Deposit has a historical reserve estimate of 761,499 short
tons grading 2.55% copper, which is derived from a 1979 internal
report for the Price Company Ltd. of Bathurst, New Brunswick
(Report on the re-evaluation of the Great Burnt Copper Deposit, by
D.E. McBride) (the "Price Company Report"). The author defined the
historical reserve estimate as a "geological ore reserve" of
"proven and possible ore". The Price Company Report did not provide
a breakdown between proven and possible ore. The estimate was based
on a longitudinal section of the deposit in which the mineralized
zones were split into 10, 200 - foot long blocks. The author made
five assumptions in the course of his calculations: (a) the average
sulphide content was assumed to be 9%; the specific gravity of the
host rock was assumed to be 2.8, with an average tonnage factor of
11 cubic feet per short ton; (b) near surface drill holes with
weathered core were ignored as not being representative; (c) drill
holes were assumed to form a straight section bisecting the section
within the block; (d) the assay influence of each drill hole
extended half-way to the next drill hole; and (e) drill holes GB3,
GB5, GB11, GB12, GB48 and GB 54 were ignored (although no
explanation was provided in the report for these exclusions). Drill
hole GB57 and other "more southerly" holes were moved to the end
position (although no explanation was provided in the report for
these moves). The next most recent historical estimate for the
Great Burnt Lake Deposit is from an unpublished report on the
reserves of the Great Burnt & South Pond Deposits prepared in
1974 by ASARCO (Buchans Unit), which was a preliminary and limited
investigation of the feasibility of developing and operating the
Great Burnt Lake and South Pond Deposits (the "ASARCO Report"). The
ASARCO Report summarized possible mining, scheduling, milling and
copper price scenarios. A historical and unsourced "reserve" of
862,800 short tons grading 2.85% copper was reported. The author of
the ASARCO Report assumed that 80% of the reported material was
recoverable and that mining dilution could be kept at or below 15%,
which produced a "reserve" of 800,0000 short tons at 2.48% copper.
No other description of estimation methods or assumptions were
reported. South Pond Deposit The South Pond Deposit has a
historical reserve estimate of 240,000 short tons grading 1.07%
copper, which is derived from the ASARCO Report. In the ASARCO
Report, a historical and unsourced "reserve" of 250,000 short tons
grading 1.23% copper was noted. The author assumed that 80% of the
reported material was recoverable and that mining dilution could be
kept at or below 15%, which produced a "reserve" of 240,000 short
tons at 1.07%. No description of estimation methods or assumptions
were reported. The next most recent historical estimate for the
South Pond Deposit is from an internal report for the British
Newfoundland Exploration Ltd. or Brinex (Great Burnt Copper
Prospect, Newfoundland; 1972 by A. P. Beavan) (the "Brinex
Report"), in which the average grade and total tonnage were
calculated using polygons of influence around eleven diamond drill
intersections on 6 cross sections at 300-foot centres. The
resultant "reserve indicated by drilling" was 323,000 short tons at
1.33% copper. No other description or estimation methods or
assumptions were reported. Dawson Project- Historical Resource
Estimate Mineral resource estimates were carried out by US Borax,
A.C.A. Howe and Uranerz U.S.A., Inc. ("Uranerz") over a period of
about 6 years (1985-1991). The Dawson Project consists of the
Dawson Segment and the Windy Gulch Segment. A qualified person has
not done sufficient work to classify the Dawson Project historical
estimates as current mineral resources or mineral reserves. In
addition, the Corporation is not treating such historical estimates
as current mineral resources or minerals reserves as defined in
sections 1.2 and 1.3 of NI 43-101 and the historical estimates
should not be relied upon. The technical contents below with
respect to the Dawson Project were reviewed but were not verified
by Ms. Isobel Wolfson, P, Geo, a qualified person who is not
independent from the Corporation as the majority of Ms. Wolfson's
income is derived from her engagement as a consultant of the
Corporation. Ms. Wolfson is a geoscientist with over 20 years of
experience as an underground mine geologist in volcanogenic massive
sulphide ("VMS") style base metal deposits. She has participated in
numerous mineral resource estimates and is familiar with both the
information required and the processes used to produce a mineral
resource estimate, both in Canada (using NI 43-101) and Australia
(using the JORC Code). The Dawson Segment The most recent resource
estimations for the Dawson Segment were completed in 1991 and 1992.
The following estimation method is taken from the 1991 Annual
Report of Uranerz U.S.A., Inc. by C. Mettler (1991 Annual Report;
Project 7355: Dawson. Uranerz USA Inc. Report, 1992) (the "Uranerz
Report"). For the Dawson Segment, resources were calculated using a
method whereby the influence around diamond drill intersections was
calculated by the inverse distance squared method ("IDS") on
longitudinal sections oriented parallel to mineralized zones
constrained by geological and geochemical boundaries. Each
longitudinal section was subdivided into square 25' x 25' (625
square feet) cells. Where there was more than one gold assay for a
sample interval, the assays were averaged. Gold assays were uncut.
All gold values below 0.007 ounces per short ton ("opt") were set
to 0.001 opt. Intervals not sampled but identified within the
mineralized zones were given a blank gold value. Gold grades were
composited within sample intervals to give a weighted average gold
grade. The true thickness ("T") of each zone in drill core was
calculated by multiplying the sine of the average foliation angle
of the sample intervals by the entire sample length. The average
grade was multiplied by the true thickness to produce a
"grade-thickness" ("GT") value for each composited interval. Using
a search radius of 125 feet, up to 5 GT values were used to
calculate an average GT and T (true thickness) for each cell. Those
blocks with GT values ≥ 1.0 were used in the resource calculations.
An average tonnage factor of 12.4 cubic feet per short ton
(equivalent to a specific gravity of 2.58) was used; this was based
on specific gravity tests on eight "representative samples". For
each mineralized zone, the total of the number of cells above the
"cutoff" (GT values ≥ 1.0) was divided by 625 square feet (cell
area) to give an area of the zone. The average true thickness was
the sum of the T divided by the total number of cells. The volume
of the zone was calculated as the area multiplied by the average
thickness. The tonnage of the zone was calculated by dividing the
volume by the tonnage factor. The average gold grade for each zone
was calculated by the sum of GT divided by the sum of T. The
minimum required thickness of each zone was 5 feet. If the zone was
less than 5 feet, it was diluted with material at zero gold grade
and 2.58 specific gravity to produce a zone with a thickness of 5
feet. Mineralization in the Dawson Segment consists of 3 main
zones; a fourth zone was only intersected by 2 drill holes and was
not included in the resource. Based on the Uranerz Report, the
Dawson Segment contains a "gold resource" of 263,000 short tons at
a diluted (to 5 feet minimum thickness) grade of 0.460 ounces gold
per short ton (opt). with an average thickness of 6.6 feet. Uranerz
contracted American Mine Services, Inc. ("AMSE") to conduct a
preliminary feasibility study of the property, specifically the
zones in the Dawson Segment (Pre-feasibility Study of the Dawson
Project. Cañon City, Colorado. American Mine Services, Inc.
February 15, 1991) (the "ASME Report"). Using the resource
estimates and geological interpretation supplied by Uranerz, AMSE
added 1 foot of waste rock at zero grade to both the hangingwall
and footwall of the original 5- foot minimum width to reflect
actual recoveries during mining; 3 blocks were removed from the
zones because they were considered too deep and too small to
justify development costs. After inspection of the drill core, ASME
assumed ground conditions to be fair, requiring routine rockbolting
with the occasional steel sets and shotcreting. Mine water inflow
was assumed to be 500 US gallons per minute. Under ASME's
direction, a metallurgical test program was completed by Hazen
Research in Denver. ASME based their reserve estimations on a
cut-and-fill mining method with cemented fill providing ground
support; no pillars or sill pillars were contemplated. AMSE
calculated a "diluted mineable reserve" of 397,069 short tons
grading 0.308 ounces per short ton gold. No other description of
estimation methods or assumptions were reported. The historical
estimates of "gold resource" and "diluted mineable reserve" are
categories other than the ones set out in Sections 1.2 and 1.3 of
NI 43-101. Such categories cannot be compared to current mineral
resources or mineral reserves as defined in Sections 1.2 and 1.3 of
NI 43-101 as there have been no work to verify and classify such
historical estimates. The historical estimates are not compliant
with NI 43-101 and should therefore not be relied upon. The Windy
Gulch Segment The Windy Gulch Segment contains 3 areas of gold
mineralization. Calculations on the "best defined" area indicated a
"preliminary gold resource" of 33,600 short tons at 0.405 ounces
per short ton gold, with an average true thickness of 8.7 feet. The
block was defined by 6 surface diamond drill holes, 3 underground
drill holes and several surface channel samples. These figures are
taken from Uranerz's 1990 annual report by C. Mettler (1990 Annual
Report; Project 7355: Dawson. Uranerz USA Inc., March 1991 (the
"Uranerz 2 Report"). No description of estimation methods or
assumptions were reported. Historical Estimate Categories The
historical estimates of (i) "geological ore reserves" of "proven
and possible ore" used in the Price Company Report with respect to
the Great Burnt Lake Deposit; (ii) "reserves" used in the ASARCO
Report with respect to the Great Burnt Lake Deposit and the South
Pond Deposit; (iii) "reserve indicated by drilling" used in the
Brinex Report with respect to the South Pond Deposit; (iv) "gold
resource" used in the Uranerz Report and "diluted mineable reserve"
used in the ASME Report with respect to the Dawson Segment; and (v)
"preliminary gold resource" used in the Uranerz 2 Report are
categories other than the ones set out in Sections 1.2 and 1.3 of
NI 43-101. Such categories cannot be compared to current mineral
resources or mineral reserves as defined in Sections 1.2 and 1.3 of
NI 43-101 as there has been no work to verify and classify such
historical estimates. The historical estimates are not compliant
with NI 43-101 and should therefore not be relied upon. Advisories
The above estimates are historic in nature and were compiled before
National Instrument 43-101 - Standards of Disclosure for Mineral
Projects ("NI 43-101") came into effect. The resource and reserve
estimates have not been verified by an independent "Qualified
Person" and are presented for information purposes only. They are
not compliant with NI 43-101 and should not be relied upon.
Moreover, work required to verify and classify the historical
resource and reserve estimates as current mineral resources or
minerals reserves in accordance with NI 43-101 has not been carried
out by the Corporation and the Corporation is not treating these
estimates as current mineral resources or mineral reserves as
defined in sections 1.2 and 1.3 of NI 43-101. Finally, the
Corporation does not make any representation or warranties as to
the accuracy of the historical resource or reserve estimates. Ms.
Isobel Wolfson, P, Geo is a qualified person as defined by National
Instrument 43-101 and has reviewed the technical information
reported in the news release for accuracy. Change of Head Office
The Corporation has also changed its head office to: 20 High
Street, Suite 201 Grand Falls - Windsor, Newfoundland A2A 1C6
Telephone: (709) 489-6480 Fax: (709) 489-7092 Forward Looking
Statements: Certain information set forth in this news release
contains forward-looking statements or information
("forward-looking statements"). Although the forward-looking
statements contained in this press release reflect management's
current beliefs based upon information currently available to
management and based upon what management believes to be reasonable
assumptions, the Corporation cannot be certain that actual results
will be consistent with these forward-looking statements. A number
of factors could cause events and achievements to differ materially
from the results expressed or implied in the forward-looking
statements. Forward-looking statements necessarily involve
significant known and unknown risks, assumptions and uncertainties
that may cause the Corporation's actual results, event, prospects
and opportunities to differ materially from those expressed or
implied by such forward-looking statements. Although the
Corporation has attempted to identify important risks and factors
that could cause actual actions, events or results to differ
materially from those described in forward-looking statements,
there may be other factors and risks that cause actions, events or
results not to be anticipated, estimated or intended. There can be
no assurance that the forward-looking statements will prove to be
accurate, as actual results and future events could differ
materially from those anticipated in such statements. Any
forward-looking statements are made as of the date of this press
release, and the Corporation assumes no obligation to update or
revise them to reflect new events or circumstances, unless
otherwise required by law. Neither the TSX Venture Exchange nor its
Regulation Services Provider (as such term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for
the adequacy or accuracy of the release. To view this news release
in HTML formatting, please use the following URL:
http://www.newswire.ca/en/releases/archive/December2010/06/c2851.html
pbBarry Greene, Vice President/bbr/ Celtic Minerals Ltd.br/ Phone:
(709) 489-6480br/ Fax: (709) 489-7092br/ Email: a
href="mailto:bgreene@celticminerals.nf.net"
cr="true"bgreene@celticminerals.nf.net/a/p
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