Outstanding Results Achieved From Mechanical Sorting Tests Completed at TOMRA’s Testing Facility in Sydney, Australia and W...
February 27 2020 - 7:00AM
Novo Resources Corp. (“
Novo” or
the “
Company”) (TSX-V: NVO; OTCQX: NSRPF) has
recently conducted mechanical, sensor based sorting tests on Egina
and Beatons Creek bulk sample material at TOMRA’s Sydney, Australia
and Wedel, Germany testing facilities.
Highlights:
Sydney, Australia: Test work
conducted utilizing a TOMRA COM XRT 1200 - Gen 1.0 mechanical
sorter using X-Ray Transmission (“XRT”) scanning
is summarized below:
Egina:
- Testing was conducted on 5.4 t of
material sieved to three size fractions: +0/-6mm, +6/-18mm and
+18/-50mm, with known quantities of test nuggets introduced into
the samples commensurate with each size fraction to test recovery
effectiveness.
- Outstanding results were achieved
for all Egina size fractions, (please refer to summary table below)
with 100% of gold recovered in 1.2% of the mass of
the +18/-50mm size fraction, 100% of gold recovered in 0.3%
of the mass of the +6/-18mm size fraction and 92%
(by weight) of gold recovered in 0.1% of the mass of +0/-6mm size
fraction. To better test recovery of the +0/-6mm size
fraction, bulk material was delivered to TOMRA’s laboratory in
Wedel, Germany for testing on a new prototype fines sorting
machine (please refer to “Wedel, Germany” summary
below).
Beatons Creek:
- Testing in Sydney was conducted on
2.8 t of crushed (-50 mm) and screened Beatons Creek bulk sample
material sieved to two size fractions: +6/-18mm and +18/-50mm.
- Analyses conducted as part of this
test work generated a calculated head grade of 4.20 gpt Au for the
sample.
- Testing was conducted at near
expected production rates for this material, with the +18/-50mm
size fraction tested at 51 tph and +6/-18mm size fraction tested at
23 tph. An impressive 94% of gold was recovered in 43% of
the mass of the +18/-50 mm fraction and 82% of
gold was recovered in 37% of the mass of the +6/-18 mm
fraction.
- To better test recovery of the
+0/-6MM size fraction, bulk material was delivered to TOMRA’s
laboratory in Wedel, Germany for testing on a new prototype
fines sorting machine (please refer to “Wedel, Germany”
summary below).
Wedel, Germany: Test work
conducted on TOMRA’s Fine Diamond Recovery (“FDR”)
prototype, with ultra high resolution X-Ray Transmission
(“XRT”) scanner is summarized below:
Egina:
- Outstanding results achieved for
Egina +0/-6mm sized material from TOMRA’s FDR, with 100% of
introduced gold nuggets recovered, the smallest of which
is 0.7mm smallest dimension (see Figure 1 depicting recovered gold
nuggets).
- 120 out of 120 nuggets collectively
weighing 7.17g were recovered in just 35.5g of concentrate from
54kg of test material, representing 100% recovery in 0.07%
of the original mass. (see video of nuggets being
processed and sorted by the FDR:
https://www.youtube.com/watch?v=nBGTDL3NSQ8&feature=youtu.be).
Beatons Creek:
- A sub-sample of the Beatons Creek
+0/-6mm was further sieved into +0/-2mm and +2mm/-6mm size
fractions. Three trials were conducted on the coarser size fraction
and four trials on the finer size fraction, with each test running
adjusted scanning programs to alter the mass pull into accepts and
rejects.
- Samples of the accept and reject
material have been delivered to Minanalytical Laboratories in
Perth, WA and subjected to ChrysosTM PhotonAssay to determine gold
content to assess recovery. Novo will notify the market of the
effectiveness of this sorting method once results have
returned.
Summary of mechanical sorting
test results from a 5.4 tonne Egina bulk sample
(Sydney):
Starting
Material |
|
Sorted
Fractions |
|
|
|
% Mass Accepted |
1.2 |
% |
|
|
>>>>>>> |
% Gold Accepted |
100 |
% |
+18 -50mm |
14.5 |
% |
|
|
|
|
|
>>>>>>> |
% Mass Rejected |
98.8 |
% |
|
|
|
% Gold Rejected |
0 |
% |
|
|
|
|
|
|
|
|
% Mass Accepted |
0.3 |
% |
|
|
>>>>>>> |
% Gold Accepted |
100 |
% |
+6 -18mm |
26.3 |
% |
|
|
|
|
|
>>>>>>> |
% Mass Rejected |
99.7 |
% |
|
|
|
% Gold Rejected |
0 |
% |
|
|
|
|
|
|
|
|
% Mass Accepted |
0.1 |
% |
|
|
>>>>>>> |
% Gold Accepted |
92.0 |
% |
+0 -6mm |
59.2 |
% |
|
|
|
|
|
>>>>>>> |
% Mass Rejected |
99.9 |
% |
|
|
|
% Gold Rejected |
8.0 |
% |
Summary of mechanical sorting
test results from a 2.8 tonne Beatons Creek bulk sample
(Sydney):
Starting
Material |
|
Sorted
Fractions |
|
|
|
|
% Mass Accepted |
43.0 |
% |
|
|
|
>>>>>>> |
% Gold Accepted |
94.0 |
% |
+18 -50mm |
47.0 |
% |
|
|
|
|
|
|
>>>>>>> |
% Mass Rejected |
57.0 |
% |
|
|
|
|
% Gold Rejected |
6.0 |
% |
|
|
|
|
|
|
|
|
|
|
% Mass Accepted |
37.0 |
% |
|
|
|
>>>>>>> |
% Gold Accepted |
82.0 |
% |
+6 -18mm |
24.4 |
% |
|
|
|
|
|
|
>>>>>>> |
% Mass Rejected |
63.0 |
% |
|
|
|
|
% Gold Rejected |
18.0 |
% |
|
|
|
Awaiting Assay Results |
|
|
|
>>>>>>> |
|
|
+0 -6mm |
28.6 |
% |
|
|
|
|
|
>>>>>>> |
Awaiting Assay Results |
|
|
|
|
|
|
“These very encouraging results utilizing TOMRA
mechanical, sensor based sorters lend further support to the
effectiveness of mechanical sorting technology to substantially
upgrade and/or process Novo’s nuggety gold deposit styles”,
commented Rob Humphryson, CEO and a director of Novo. “Field trials
with larger bulk samples under production conditions are needed to
validate these highly encouraging, indicative laboratory test
results. TOMRA, Steinert and third-party providers have suitable
mechanical sorting units available for hire, and plans are well
underway to deploy a mechanical sorter into the field this season.
We are fortunate to have two world class mechanical sorter
providers vying for our business, each with substantial technical
support available and commitments to ongoing research and
development. Irrespective of which unit is first deployed into the
field, we intend to maintain positive working relationships with
both major providers to ensure we leverage the inevitable
operational improvements resulting from their demonstrated
commitment to ongoing research and development in the field of
direct gold sorting”.
Description of Test Work
Beatons Creek A total of
approximately 5.6 tonnes of costean-sourced material collected
during the bulk sampling program conducted at Beatons Creek in 2018
(see the Company’s new releases dated December 13, 2018 -
https://www.novoresources.com/news-media/news/display/index.php?content_id=334
– and January 29, 2020 -
https://www.novoresources.com/news-media/news/display/index.php?content_id=378)
was crushed and screened at Bureau Veritas’ laboratories in Perth,
Western Australia. Sample material was then screened to +0.0/-6.0
mm, +6.0/-18.0 mm and +18.0/-50.0 mm, the same size fractions used
during Egina test work (see the Company’s new release dated
December 17, 2019 -
https://www.novoresources.com/news-media/news/display/index.php?content_id=371).
Half of this material, approximately 2.8 tonnes, was delivered to
TOMRA’s mechanical sorting test facility in Castle Hill, New South
Wales for test work. Sub-samples of the latter were forwarded to
Germany for testing in February 2020, which was further screened
into +0/-2mm and +2mm/-6mm size fractions to better test the
effects of mechanical sorting at very small size fractions.
Utilizing small hand-sorted batches of Beatons Creek material,
TOMRA personnel configured suitable scanning methodologies to
determine which scanning mode is most efficient at identifying gold
particles, with XRT favoured for testing purposes.
EginaA total of approximately
5.4 tonnes of bulk sample material, sourced late 2018 from an area
adjacent to Novo’s first Egina bulk sample (please see the
Company’s new release dated December 13, 2018 -
https://www.novoresources.com/news-media/news/display/index.php?content_id=334)
was screened at Bureau Veritas’ laboratories in Perth, Western
Australia into 3 size fractions : +0.0/-6.0 mm, +6.0/-18.0 mm and
+18.0/-50.0 mm. Owing to the non-destructive nature of
Minanalytical’s ChrysosTM PhotonAssay technique, the Steinert test
samples were able to be recombined in totality and forwarded to
TOMRA’s Sydney facility, with a small sub-sample of the fines
fraction forwarded to TOMRA’s laboratory in Wedel, Germany. Each
size fraction was ‘seeded’ with nuggets to enable a demonstration
of gold recovery effectiveness. Gold nuggets were recovered by
sifting through the accepts concentrates and identifying the gold
by naked eye. Assessment of the recovery of very small gold
particles of less than one mm must be made by analytic means as
these grains are too small to separate from concentrates by naked
eye (see Figure 2 depicting TOMRA personnel hand picking 120
nuggets from 35.5g of concentrate). Minanalytical’s ChrysosTM
PhotonAssay technique will be used to analyze samples at which
point Novo can comment further about the ultimate recovery rate of
gold.
Dr. Quinton Hennigh, P. Geo., the Company’s
president, chairman, and a director, and a qualified person as
defined by National Instrument 43-101, has approved the technical
contents of this news release.
About Novo Resources Corp.
Novo’s focus is to explore and develop gold
projects in the Pilbara region of Western Australia, and Novo has
built up a significant land package covering approximately 13,000
sq km with varying ownership interests. For more information,
please contact Leo Karabelas at (416) 543-3120 or
e-mail leo@novoresources.com
On Behalf of the Board of Directors,
Novo Resources Corp.
“Quinton Hennigh”Quinton Hennigh President and
Chairman
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 news release.
Forward-looking information
Some statements in this news release contain forward-looking
information (within the meaning of Canadian securities legislation)
including, without limitation, statements as to planned testing
activities. These statements address future events and conditions
and, as such, involve known and unknown risks, uncertainties and
other factors which may cause the actual results, performance or
achievements to be materially different from any future results,
performance or achievements expressed or implied by the statements.
Such factors include, without limitation, customary risks of the
mineral resource industry as well as the performance of services by
third parties.
PDFs accompanying this announcement are available
at:
http://ml.globenewswire.com/Resource/Download/cce3b029-f9be-4383-bfe0-4051f7d0d520
http://ml.globenewswire.com/Resource/Download/4b697b0e-70b7-408c-bed0-36e2cf728c35
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