MacDonald Mines Exploration Ltd. (TSX-V: BMK) (“MacDonald Mines”,
“MacDonald” or the “Company”) reports the assay results from the
other half of the high-grade intersection of drill hole SM-19-022
that was announced in December 2019 (see Dec. 9, 2019 News
Release). The intersection between 16.00 and 20.98 metres included
significant visible gold (VG); which is an indication of a
potential nugget effect.
A nugget effect results when a small sampling
size fails to adequately represent the composition of the core
tested due to the non-uniform distribution of high-grade gold
nuggets in the material sampled. MacDonald’s methodology to
eliminate bias has been to always send the same side of the split
core for assay – regardless of where any potential visible gold is
noted. By analyzing the other half of the core of hole
SM-19-022 and by averaging the grade of both halves, the gold grade
of the intersection has increased by more than 35%.
The Company may or may not conduct whole-core
testing of the other intersections that reported visible gold from
the 2019 program.
Table 1. Assay results from Hole
SM-19-022 – Dec. ’19 vs Feb. ‘20.
|
|
|
|
February2020 |
December2019 |
Average (whole core) |
Hole |
From (m) |
To (m) |
Length (m) |
Au (g/t) |
Au (g/t) |
Au (g/t) |
SM-19-022 |
16.00 |
17.00 |
1.00 |
12.14 |
9.56 |
10.85 |
SM-19-022 |
17.00 |
17.90 |
0.90 |
5.30 |
8.63 |
6.96 |
SM-19-022 |
17.90 |
18.95 |
1.05 |
18.00 |
7.95 |
12.97 |
SM-19-022 |
18.95 |
19.99 |
1.04 |
9.58 |
8.42 |
9.00 |
SM-19-022 |
19.99 |
20.98 |
0.99 |
47.72 |
20.47 |
34.09 |
|
|
Total |
4.98 |
18.68 |
10.98 |
14.83 |
* Assay results presented over core length.
Additional drilling is necessary to estimate true width in the
zones discovered in SM-19-022.
The December 2019 results from hole SM-19-022
reported the discovery of a significant zone of near-surface gold
mineralization north of the Scadding East-West (“E-W”) Pit from 16
to 42 metres depth, intersecting 7.99 g/t gold over 26.2 metres
including 10.98 g/t over 4.98 metres and 11.54 g/t over 13.24
metres.
It has been well documented in the literature
that, in order to adequately sample gold grains, a representative
sample should weigh, at minimum, a few hundred tonnes (New Bendigo:
Johannsen et al, 2003). In order to counter the nugget effect in
hole SM-19-022, the Company decided to assay the other half of the
core from hole SM-19-022, even though it recognized that the sample
size was small.
The sampling of the entire core did make a
significant difference in the reported gold grade in the section of
the hole between 16.00 and 20.98 metres. The reported grade
of the intersection increased by more than 35% when we average all
the assay results. There is no assumption that similar
results would be observed in other intersections on the property
nor that assay results would always be higher. The purpose of
this one-time sampling procedure was to corroborate our
observations of VG with the results over this particular
intersection.
Table 2. Drill hole
coordinates
Hole ID |
Easting |
Northing |
Elev |
Azimuth |
Dip |
Depth |
SM-19-022 |
529532.88 |
5166472.304 |
304.605 |
232.1 |
-62.3 |
166 |
Hole SM-19-022 tested a mineralized structure
located north of the eastern end of the E-W Pit of the Scadding
Deposit. Consistent with MacDonald’s observation that the historic
drilling patterns were not systematically optimized to test the
mineralized structures of the property, hole SM-19-022 was collared
at an azimuth that was 193.5 degrees opposite of the azimuth a
drill hole from the 2011 drilling program located on the same drill
pad. This led in hole SM-19-022 to the discovery of a significant
zone of near-surface high-grade gold mineralization starting from
16 metres down-hole. Additional drilling will be necessary to fully
constrain the geometry and extent of the newly discovered
structure.
On-site Quality Assurance/Quality
Control (“QA/QC”) MeasuresDrill core samples were
transported in security-sealed bags for analyses to Bureau Veritas
in Timmins, Ontario. Individual samples are labeled, placed in
plastic sample bags and sealed. Groups of samples are then placed
into durable rice bags and then shipped. The remaining coarse
reject portions of the samples remain in storage if further work or
verification is needed.
MacDonald has implemented a quality-control
program to comply with best practices in the sampling and analysis
of drill core. As part of its QA/QC program, MacDonald inserts
external gold standards (low to high grade) and blanks every 20
samples in addition to random standards, blanks, and duplicates.
All samples over 10 g/t gold or the samples with abundant
visible gold are analysed by 1 kilogram metallic screen.
SPJ Property highlights
- 100% ownership
- 17,720 hectares in excellent mining jurisdiction and close to
infrastructure
- Hosts the high-grade past producing Scadding Gold Mine
- Evidence of polymetallic mineralization at the Scadding Deposit
indicative of IOCG potential
- Significant gold, cobalt, copper, silver, nickel and rare earth
showings outside of the Scadding Deposit footprint
Historically, the Scadding Mine produced 914
kilograms of gold from 127,000 tonnes of mineralized material
grading 7.2 g/t (OFR 5771). MacDonald’s reinterpretation of the
geological model at the Scadding Deposit and larger SPJ property
indicates that it could host a gold-rich Iron-Oxide-Copper-Gold
deposit and that significant gold structures may have been missed
by previous operators’ drilling campaigns (2009-2011).
Qualified PersonQuentin Yarie,
P Geo. is the qualified person responsible for preparing,
supervising and approving the scientific and technical content of
this news release.
About MacDonald Mines Exploration
Ltd.MacDonald Mines Exploration Ltd. is a mineral
exploration company headquartered in Toronto, Ontario focused on
gold exploration in Canada. The Company is focused on
developing its large SPJ Project in Northern Ontario.
The Company's common shares trade on the TSX
Venture Exchange under the symbol "BMK".
To learn more about MacDonald Mines, please
visit www.macdonaldmines.com
For more information, please contact:
Quentin Yarie, President & CEO, (416)
364-4986, qyarie@macdonaldmines.com
Or Mia Boiridy, Investor Relations, (416)
364-4986, mboiridy@macdonaldmines.com
Neither TSX Venture Exchange nor its Regulation
Services Provider (as that term is defined in the policies of the
TSX Venture Exchange) accepts responsibility for the adequacy or
accuracy of this release.
This News Release contains forward-looking
statements. In some cases, you can identify forward-looking
statements by terminology such as “may”, “should”, “expects”,
“plans”, “anticipates”, “believes”, “estimates”, “predicts”,
“potential” or “continue” or the negative of these terms or other
comparable terminology. These statements are only predictions and
involve known and unknown risks, uncertainties and other factors
that may cause our or our industry’s actual results, levels of
activity, performance or achievements to be materially different
from any future results, levels of activity, performance or
achievements expressed or implied by these forward-looking
statements.
Although the Company believes that the
assumptions and factors used in preparing the forward-looking
information in this news release are reasonable, undue reliance
should not be placed on such information, which only applies as of
the date of this news release. The Company disclaims any intention
or obligation to update or revise any forward-looking information,
whether as a result of new information, future events or otherwise,
other than as required by law.
A figure accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/0e4cd543-57bd-4102-984e-cc387082e808
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