Inventus Mining Corp. (TSX VENTURE:IVS)
(“Inventus” or the “Company”) is pleased to announce the results
from a 1,000-tonne bulk sample from the Pardo Paleoplacer Gold
Project (“Pardo”) near Sudbury, Ontario. The total gold content of
the bulk sample was calculated to be 4.16 kg (133.8 Troy ounces) of
gold, equivalent to
4.2 grams per tonne (gpt). A
total of 3.72 kg (119.5 Troy ounces) of gold was recovered from 985
dry tonnes of mill feed. The tailings are estimated to contain an
additional 0.44 kg (14.2 Troy ounces) of gold, indicating a
recovery rate for gold of approximately 89%. Diamond drilling in
the bulk sample area prior to extraction consisted of eleven holes
that returned an average grade of 1.34 gpt gold. Processing of the
bulk sample demonstrates a significant increase in the gold grade
when compared to assays of diamond drill core.
“Paleoplacer gold deposits are enigmatic
by nature and do not reveal their secrets easily. The results of
this initial bulk sample are highly encouraging and highlight the
critical importance of bulk sampling for grade estimation. Assaying
of drill core alone is insufficient to determine the actual grade
of the mineralized boulder conglomerate. The success of this bulk
sample has increased our confidence about the overall grade of the
boulder conglomerate, confirming our belief that continued
investment in exploration and additional bulk sampling is
warranted,” said Stefan Spears, Chairman and CEO.
Bulk Sample Procedure
The bulk sample was extracted from a pit with a
surface area of 240 square metres. Approximately 1,000 wet tonnes
was blasted and the run-of-mine material was transported by truck
to McEwen Mining’s Black Fox Mill (the “BFM”) near Timmins,
Ontario. The BFM is a conventional gold mill comprised of a
three-stage comminution circuit, cyanide leach and carbon-in-leach
(CIL) gold recovery. Prior to batch processing of the bulk sample
the mill circuit was purged with 1,000 tonnes of barren sand. The
processing of sand is designed to cleanse the milling equipment and
displace the ore in the first 800-tonne capacity leach tank.
At the BFM the Pardo material was crushed and
milled to approximately 75 microns and leached for a minimum of 30
hours. Grade and recovery calculations were made based on a total
in-circuit inventory before and after the bulk sample was
processed. Samples of the leach solution and leached solids were
also taken after 30 hours and returned a combined assay of 4.1 gpt
gold, which is consistent with the in-circuit inventory
calculation.
Bulk Sample Drilling
Prior to the extraction of the bulk sample, a
pattern of eleven diamond drill holes was completed on five-metre
centers of the bulk sample area in order to compare drilled gold
grades to bulk sample grade for the Mississagi Boulder Conglomerate
(MiBC)(see Figure 1). The drill core was sampled and assayed using
the same whole core methodology developed during the 2017
exploration program. The average assayed grade and thickness of the
target MiBC was 1.34 gpt over 2.54 m. The grades of the MiBC was
highly variable between holes, ranging from a low of 0.17 gpt over
2.44 m to a high of 4.07 gpt over 2.17 m. Visible gold was noted in
5 of the 11 holes (see Table 1).
Figure 1:
http://www.inventusmining.com/s/Figure1_Jan3.pdf
Systematic measurements of clast dimensions
taken along the drill core intercept of MiBC indicate that the
boulder conglomerate on average is composed of 26% matrix and 74%
clasts. Gold is contained within the matrix and the clasts are
barren of gold, therefore the bulk sample is composed of 26% gold
bearing matrix and 74% un-mineralized waste rock. In a news release
dated April 5, 2017 Inventus discussed the possible application of
advanced ore sorting techniques, and demonstrated in a scoping
level study, the encouraging potential to sort gold bearing matrix
from the un-mineralized clasts. We plan to continue evaluating the
use of ore sorting as a means of efficiently processing larger bulk
samples.
Risk Factors
All of the bulk sample material was removed from
a single location known as Trench 1 (see Figure 1). Trench 1 was
selected because it was considered to have representative grade,
and was ideally located for easy extraction. There is no assurance
that mining or bulk sampling in another location at Pardo would
result in similar gold content or recovery.
The BFM is a commercially operating gold
processing facility that receives feed from the Back Fox Mine and
from third party custom milling clients. To the best of our
knowledge, the mill operates using industry standard practices for
sampling and quality assurance, but is not intended for the
analysis of small batch bulk samples. The minimum custom milling
batch size normally required by the BFM is 5,000 tonnes. The mill
operator’s standard procedure prior to processing custom feed is to
purge the mill circuit by processing one thousand tonnes of barren
sand. However, it is possible that preexisting gold contained in
the circuit was flushed out while processing the bulk sample.
Similarly, the bulk sample could have deposit gold residue in the
circuit. It is unknown to what extent this may have contributed to
inaccuracies in the results. There is no certification as to the
precision of the results and readers should use caution in their
use and interpretation.
There is currently no NI 43-101 mineral resource
estimate established anywhere on the Pardo property.
Mining dilution for the bulk sample was
estimated to be 7% based on geologists’ field observations, mostly
as a result of over-blasting of the footwall in the pit. Ore loss
was estimated at 0.5%, due to over-blasting of the hanging wall,
and minor losses during transportation and handling.
Interests of Related
Parties
Inventus and McEwen Mining are related parties,
meaning that members of management have economic interests in both
companies. Stefan Spears, Chairman and CEO of Inventus, currently
provides consulting services to McEwen Mining in areas that are
unrelated to Inventus. Rob McEwen, Chairman and Chief Owner of
McEwen Mining, is a significant shareholder of both companies,
owning approximately 20% and 24% of Inventus and McEwen Mining
respectively.
The milling agreement between Inventus and
McEwen Mining was on terms believed to be commercially reasonable.
The milling agreement specified a base processing fee of $42.00 per
tonne, and a provision for cost recovery of assaying and other
miscellaneous expenses. It is expected that Inventus will pay
McEwen Mining approximately $50,000 in connection with the services
it provided processing the bulk sample. McEwen Mining will remit
the net proceeds from the sale of the gold produced to Inventus.
Inventus does not have an agreement with McEwen Mining, or any
other service provider, for the processing of future bulk samples
and as such there is no guarantee that the foregoing costs would be
representative of future costs.
Table 1 – Trench 1 Drill
Results
Hole ID |
From (m) |
To (m) |
Thickness (m) |
Gold Fire Assay Grade (gpt) |
Visible Gold (VG) Observations |
% Matrix in Conglomerate |
TR1-17-01 |
3.14 |
5.62 |
2.48 |
0.30 |
|
31.1 |
% |
TR1-17-02 |
2.98 |
5.50 |
2.52 |
0.71 |
VG @ 3.32m & 3.65m |
26.0 |
% |
Including |
2.98 |
3.82 |
0.84 |
2.12 |
TR1-17-03 |
2.00 |
4.85 |
2.85 |
1.06 |
VG @ 2.75m |
26.6 |
% |
Including |
2.60 |
3.18 |
0.58 |
3.34 |
TR1-17-04 |
1.88 |
4.77 |
2.89 |
1.39 |
|
19.3 |
% |
Including |
3.30 |
4.00 |
0.70 |
4.88 |
|
TR1-17-05 |
2.79 |
5.23 |
2.44 |
0.17 |
|
33.4 |
% |
TR1-17-06 |
2.05 |
4.80 |
2.75 |
3.79 |
VG @ 2.67m |
17.7 |
% |
Including |
2.05 |
2.70 |
0.65 |
14.20 |
TR1-17-07 |
2.05 |
4.67 |
2.62 |
1.62 |
|
24.8 |
% |
Including |
3.60 |
4.15 |
0.55 |
3.58 |
|
TR1-17-08 |
1.64 |
3.52 |
1.88 |
0.93 |
VG @ 1.96m |
29.4 |
% |
TR1-17-09 |
2.38 |
5.30 |
2.92 |
0.30 |
|
19.7 |
% |
TR1-17-10 |
2.48 |
4.90 |
2.42 |
0.39 |
|
32.5 |
% |
TR1-17-11 |
1.63 |
3.80 |
2.17 |
4.07 |
VG @ 2.41m & 2.42m |
28.4 |
% |
Including |
2.20 |
2.75 |
0.55 |
15.01 |
|
|
Thickness (m) |
Grade (gpt) |
|
% Matrix in Conglomerate |
Bulk Sample Diamond Drilling
Average |
2.54 |
1.34 |
|
26.3 |
% |
|
|
|
|
|
|
About Inventus Mining Corp.
Inventus is a mineral exploration and
development company focused on the world-class mining district of
Sudbury, Ontario. Our principal asset is a 100% interest in the
advanced exploration stage Pardo Paleoplacer Gold Project located
65 km northeast of Sudbury. Pardo is the first important
paleoplacer gold discovery found in North America. Inventus has
106,971,069 common shares outstanding (116,965,236 shares on a
fully diluted basis).
Visit http://www.inventusmining.com for more
information.
For further information, please contact:
Mr. Stefan SpearsChairman and CEOInventus Mining Corp.Tel: (647)
258-0395 x280E-mail: info@inventusmining.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. No stock exchange, regulation services
provider, securities commission or other regulatory authority has
approved or disapproved the information contained in this news
release.
Qualified Person
Andy Bite, P.Geo, a consultant to the Company,
has reviewed and approved the scientific and technical information
contained in this news release. Mr. Bite is a Qualified Person and
independent of the Company within the meaning of Canadian
Securities Administrator's National Instrument 43-101.
Technical Information
Drill hole assay results reported in this
release are the average of two fire assay values on a 1 kg
subsample generated from each selected core interval. The diamond
drill core samples in this release were transported in secure
sealed bags for preparation in SGS Laboratories in Sudbury, Ontario
and assayed at SGS Laboratories located in Lakefield, Ontario. A
standard or a blank was inserted every 20 samples or less. The
samples reported were crushed in their entirety to 75% passing -10
mesh, with a 1 kg subsample split pulverized to 85% passing -200
mesh. Two 50-gram aliquots were taken for fire assay (FA) with an
atomic absorption (AA) finish and averaged for final grade
determination. Results higher than 10 g/t were re-analyzed with a
gravimetric finish.
The packing percentage of the MiBC was measured
by subtracting the thickness of the boulders from the total MiBC
intercept length in each hole. The average packing percentage was
estimated based on measurements from all eleven drill holes.
The average density of the MiBC in the bulk
sample area was measured at 2.81 tonne per m3 by the water
displacement method.
Samples collected at the BFM are analyzed at the
on site lab by fire assay. Solids and solutions use an atomic
absorption (AA) finish, and samples of carbon use a gravimetric
finish. Standards and blanks are inserted every 20 samples or less.
Duplicate check assays are sent to an accredited third party
laboratory monthly as part of QA/QC processes.
Forward-Looking Statements
This News Release includes certain
"forward-looking statements" which are not comprised of historical
facts. Forward-looking statements include estimates and statements
that describe the Company’s future plans, objectives or goals,
including words to the effect that the Company or management
expects a stated condition or result to occur. Forward-looking
statements may be identified by such terms as “believes”,
“anticipates”, “expects”, “estimates”, “may”, “could”, “would”,
“if”, “yet”, “potential”, “undetermined”, “objective”, or “plan”.
Since forward-looking statements are based on assumptions and
address future events and conditions, by their very nature they
involve inherent risks and uncertainties. Although these statements
are based on information currently available to the Company, the
Company provides no assurance that actual results will meet
management’s expectations.
Risks, uncertainties and other factors involved
with forward-looking information could cause actual events,
results, performance, prospects and opportunities to differ
materially from those expressed or implied by such forward-looking
information. Forward looking information in this news release
includes, but is not limited to, the Company’s objectives, goals or
future plans, statements, exploration results, potential
mineralization, the estimation of mineral resources, exploration
and mine development plans, timing of the commencement of
operations and estimates of market conditions.
Factors that could cause actual results to
differ materially from such forward-looking information include,
but are not limited to the failure to identify mineral resources at
Pardo, the inability to complete a feasibility study which
recommends a production decision, the preliminary and limited
nature of metallurgical test results (including the result of the
bulk sample as described herein), delays in obtaining or failures
to obtain required governmental, environmental or other project
approvals, political and legal risks, inability to fulfill the duty
to accommodate First Nations and other indigenous peoples,
uncertainties relating to the availability and costs of financing
needed in the future, changes in equity markets, inflation, changes
in exchange rates, fluctuations in commodity prices, delays in the
development of projects, capital and operating costs varying
significantly from estimates and the other risks involved in the
mineral exploration and development industry, and those risks set
out in the Company’s public documents filed on SEDAR.
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, and no assurance can be given that
such events will occur in the disclosed time frames or at all. 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.
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