TIDMTYM
RNS Number : 9500I
Tertiary Minerals PLC
18 August 2021
18 August 2021
Tertiary Minerals plc ("Tertiary" or "the Company")
Exploration Update - Brunton Pass Copper Project, Nevada,
USA
Tertiary Minerals plc is pleased to provide the following
exploration update on its 100% owned Brunton Pass Copper Project in
Nevada, USA:
Highlights:
Ø Rock samples from northern half of claim block contain up to
6.84% copper and 1.75 grammes/tonne (g/t) gold in separate
samples.
Ø Project wide soil sampling, drone magnetic and photogrammetric
surveys completed:
Ø Multiple copper soil anomalies defined associated with
extensive skarn and hornfels alteration.
Ø Mercury soil anomalies and rock samples suggest additional
potential for epithermal gold and silver.
Ø Interpretation of drone aeromagnetic data provides structural
framework for mineralisation.
Ø Follow-up trenching programme planned.
Commenting today, Executive Chairman Patrick Cheetham said:
"Our systematic exploration at Brunton Pass has highlighted
multiple zones of copper-skarn mineralisation with a possible
overprint of mercury mineralisation which may represent the high
levels of an epithermal system prospective for gold and silver.
This is shaping up as a priority target and we look forward to
reporting further exploration results from this exciting prospect
alongside the follow up trenching underway at our Pyramid
Gold-Silver Project in Nevada and the recently optioned copper
projects in Zambia."
Thematic Plan
A thematic plan illustrating the information contained in this
news release will be available on the Brunton Pass Project page of
the Company's website www.tertiaryminerals.com
See below for detailed project summary.
For more information please contact:
Tertiary Minerals plc:
Patrick Cheetham, Executive
Chairman +44 (0) 1625 838 679
----------------------
SP Angel Corporate Finance LLP
Nominated Adviser and Broker
Richard Morrison +44 (0) 203 470 0470
----------------------
Caroline Rowe
----------------------
Peterhouse Capital Limited
Joint Broker
Lucy Williams + 44 (0) 207 469 0930
-----------------------
Duncan Vasey
----------------------
Market Abuse Regulation (MAR) Disclosure
The information contained within this announcement is deemed by
the Company to constitute inside information as stipulated under
the Market Abuse Regulations (EU) No. 596/2014 which forms part of
UK domestic law by virtue of the European Union (Withdrawal) Act
2018 ('MAR'). Upon the publication of this announcement via
Regulatory Information Service ('RIS'), this inside information is
now considered to be in the public domain.
Brunton Pass Copper Project
The Company's acquisition of the Brunton Pass Project was
announced earlier this year, on 18 January 2021, after sampling of
prospector small-scale surface workings, possibly originally dug
for turquoise, revealed high copper values in the southern half of
the claim block.
Since then, rock sampling and reconnaissance mapping has been
extended into the northern part of the claim block where there are
similar workings with shows of copper oxide minerals and where a
small of amount of mercury was historically produced at the
Antelope Mine.
A high-resolution drone-based aeromagnetic-photogrammetric
survey and soil sampling have also been carried out across the
whole project area.
Nine rock chip samples were taken as grab samples from different
small prospecting pits and submitted for gold fire assay and
multi-element analysis. Highlights include grab samples
BR-014 which returned 6.84% copper and BR-016, which contained
1.75 g/t gold and 2.37% copper. Anomalous silver was also detected
with an average of 14.65 g/t silver across all samples
collected.
The drone and photogrammetric surveys were flown using 50 metre
line spacing and 61 line-kilometres of data was collected. The
photogrammetric survey provides aerial imagery to assist geological
interpretation as well as an environmental baseline for future
surface disturbance.
The magnetic data was processed by Magnetic Vector Inversion
Modelling to produce a 3D magnetic model of the survey area. A
structural and geological interpretation of the magnetic data was
also conducted to define structures that could be potential
pathways for mineralisation and a framework for further
exploration.
Copper and mercury mineralisation at Brunton Pass is closely
associated with hornfels and skarn alteration of limestone and
associated sediments that form a northwest-southeast oriented, 1km
x 0.75km, "window" within younger Tertiary-age volcanic rocks. The
magnetic inversion model suggests that the sediments may be
underlain at shallow depth by a large intrusive body that could be
the source of the alteration and mineralisation. Evidence for this
underlying body is found in surface outcrops of quartz monzonite
and diorite dykes. The limestone window forms a magnetic low within
Tertiary volcanics and appears to be in fault contact with the
volcanics.
A total of 485 soil samples were collected at 50m spacing on
lines 100m apart over the main sedimentary window and on a 100m by
100m offset grid over the remainder of the project area. The
samples were submitted to Paragon Geochemical Laboratories, Reno
for multi-element analysis. Several copper-in-soil anomalies(2)
with individual grades of up to 953ppm copper are present within
the project area. The largest of these anomalies has dimensions of
340m x 310m and they are mainly coincident with areas of rock
samples containing percent-level copper values.
Two large mercury-in-soil anomalies(2) were also defined with
values up to 52 ppm mercury with the largest of these extending
over an area approximately 500m x 500m. This anomaly encircles the
copper soil anomalies in the northern part of the project area and
at its western part it is coincident with a deep magnetic low,
possibly reflecting magnetite destructive mineral alteration.
The Company considers that an episode of intrusion related skarn
copper mineralisation at Brunton Pass has been overprinted by a
later episode of mercury mineralisation which may represent the
high levels of an epithermal system prospective for gold and
silver.
The Company now intends to conduct a preliminary trenching
programme across the main copper anomaly and carry out further
investigation of the potential for gold and silver
mineralisation.
Notes:
1. Soil samples were submitted to Paragon Geochemical
Laboratories, Reno. Samples were screened to -80 mesh and analysed
by method FSAU-25, a 51-element aqua regia digest with ICP-MS
finish. Rock chip samples were analysed by ALS, Reno and analysed
by method ME-MS61, a 48-element 4-acid digest with ICP-MS finish.
Over-range analysis was via Cu-OG62, a 4-acid digest with ICP-AES
finish, and Au-ICP21, a 30g fire assay with ICP-AES finish.
Internal QA/QC samples were inserted by the analytical laboratories
and reviewed by the Company prior to release.
2. Anomalous soil samples are defined in this case by the 90(th)
percentile values of the soil value population, being 55 parts per
million copper and 740 parts per billion mercury.
3. The information in this release has been compiled and
reviewed by Mr. Patrick Cheetham (MIMMM, MAusIMM) who is a
qualified person for the purposes of the AIM Note for Mining and
Oil & Gas Companies. Mr. Cheetham is a Member of the Institute
of Materials, Minerals & Mining and also a member of the
Australasian Institute of Mining & Metallurgy.
4. The news release may contain certain statements and
expressions of belief, expectation or opinion which are forward
looking statements, and which relate, inter alia, to the Company's
proposed strategy, plans and objectives or to the expectations or
intentions of the Company's directors. Such forward-looking
statements involve known and unknown risks, uncertainties, and
other important factors beyond the control of the Company that
could cause the actual performance or achievements of the Company
to be materially different from such forward-looking statements.
Accordingly, you should not rely on any forward-looking statements
and save as required by the AIM Rules for Companies or by law, the
Company does not accept any obligation to disseminate any updates
or revisions to such forward-looking statements.
Note to Editors:
Tertiary Minerals plc (ticker symbol 'TYM') is an AIM-traded
mineral exploration and development company building a
multi-commodity project portfolio.
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