Cypress Development Completes First Step in Chloride Leaching Study for Clayton Valley Lithium Project in Nevada
December 16 2020 - 7:00AM
Cypress Development Corp. (
TSX-V:
CYP) (
OTCQB:
CYDVF) (
Frankfurt:
C1Z1) (“Cypress” or “the Company”) is pleased to
report the first stage in the scoping level study into the
extraction of lithium using chloride-based leaching is completed.
This work consisted of preparation and acid leaching of a large
sample from the Company’s Clayton Valley Lithium Project and was
accomplished at Continental Metallurgical Services Inc. (CMS) in
Butte, Montana. Samples of the leach solution and the initial and
final solids were shipped for assay. The remaining steps of testing
will focus on the treatment of the leach solutions and are expected
to be completed by month end.
Sample Selection GCH-08
For the testing, sample material was obtained
from Cypress drill hole GCH-08. As reported in April 3, 2019 news
release, GCH-08 encountered lithium mineralization from 3 m to 112
m depth (109 meters) averaging 1127 ppm Li. The drill hole is in
the area of proposed initial mining as described in the Company’s
May 19, 2020 Prefeasibility Study (PFS) where overburden is
negligible. (see map). Samples were transported from storage at ALS
in Reno to Butte Montana. A bulk sample was prepared from 1 kg
splits taken from (33) 3 m intervals for total 33 kg sample. (see
photo, sample bags).
Location of Drill Hole GCH-08 used as
Sample Material:20201215_cvlp_gch_08.jpg (1154×1500)
(cypressdevelopmentcorp.com)
Sample Bags Shipped to Continental
Metallurgical Services
(CMS):https://cypressdevelopmentcorp.com/site/assets/files/3947/20201215_cvlp_dhsb.jpg
Large Sample Leach
At CMS, the 33 kg bulk sample was prepared and
mixed into a slurry with heated sodium chloride brine solution.
Additional salt was added to simulate levels expected in a chloride
system. Once the slurry was mixed and at temperature, hydrochloric
acid was added to achieve target conditions and the slurry was
leached for four hours. Samples of the slurry were taken at regular
intervals throughout the leaching.
Leach Setup for Claystone from Clayton
Valley Project:20201215_cvlp_cls.jpg (675×900)
(cypressdevelopmentcorp.com)
Leach Solution (PLS) Samples from Clayton
Valley Project:20201215_cvlp_ls.jpg
(675×900) (cypressdevelopmentcorp.com)
Upon addition of acid, vigorous frothing was
observed. The filtered leachate was yellow versus the lime green
seen with the sulfuric acid leach. Notable in test was the slurry
separated into solid and liquids portion in the span of several
hours, to the extent leach solution was decanted from the mixing
tank with no filtration which could be an advantage over sulfuric
acid leach.
Filtering of Leach Solution from Clayton
Valley Project:20201215_cvlp_clt.jpg (675×900)
(cypressdevelopmentcorp.com)
Remaining Work
Purification of the leach solution will be
examined by pH adjustments. This work has been conducted on bench
scale test with 200 g and 400 g samples. Of interest in the results
will be the deportment of impurities including rare earth elements,
which in bench testing appeared to have higher extraction rates
than observed in sulfuric acid leaching.
Leach slurry samples were shipped to Pocock in
Salt Lake for testing on solid-liquid separation. These results
will be important in determining if changes in the filtration and
tailings handling portions of the plant design will be
warranted.
Further bench scale tests on feed material will
be conducted to determine if lithium grades in solution can be
increased by the subsequent leaching of fresh feed material (i.e.
preg loading).
Implications on Pilot
Program
All test work for the scoping study is expected
to be completed by month end and the study is on track for
completion in January 2021. All major elements of the leaching and
filtration portions of the pilot plant are expected to remain
unchanged. If the chloride leaching is successful and is indicated
to be economically justified, steps within the lithium
concentration and recovery process will require additional
equipment in the pilot program to evaluate.
Qualified Person:
Todd Fayram, MMSA-QP, is the qualified person as
defined by National Instrument 43-101 and has approved the
technical information in this release.
About Cypress Development
Corp.:
Cypress Development Corp. is a publicly traded
exploration company focused on developing the Company’s 100%-owned
Clayton Valley Lithium Project in Nevada. Exploration and
development by Cypress discovered a world-class resource of
lithium-bearing claystone adjacent to the Albemarle Silver Peak
mine, North America's only lithium brine operation. The size of the
resource makes the Clayton Valley Project a premier source that has
the potential to impact the supply of lithium for the fast-growing
global energy storage battery market.
Clayton Valley Lithium Project, Nevada
Claims Map:cyp_cypress_-_albemarle_properties_map.jpg
(1060×706) (cypressdevelopmentcorp.com)
Cypress Development Corp. has approximately 98.7
million shares issued and outstanding.
To find out more about Cypress Development Corp.
(TSX-V: CYP), visit our website at
www.cypressdevelopmentcorp.com.
CYPRESS DEVELOPMENT CORP.
“Dr. Bill Willoughby”
WILLIAM WILLOUGHBY, PhD.,
PEChief Executive Officer
For further information contact myself or:Don MyersCypress
Development Corp.Director, Corporate CommunicationsTelephone:
604-639-3851Toll Free: 800-567-8181Facsimile: 604-687-3119Email:
info@cypressdevelopmentcorp.com
NEITHER THE TSX VENTURE EXCHANGE NOR ITS
REGULATION SERVICES PROVIDER ACCEPTS RESPONSIBILITY FOR THE
ADEQUACY OR ACCURACY OF THE CONTENT OF THIS NEWS RELEASE.
This release includes certain statements that
may be deemed to be "forward-looking statements". All statements in
this release, other than statements of historical facts, that
address events or developments that management of the Company
expects, are forward-looking statements. Although management
believes the expectations expressed in such forward-looking
statements are based on reasonable assumptions, such statements are
not guarantees of future performance, and actual results or
developments may differ materially from those in the
forward-looking statements. The Company undertakes no obligation to
update these forward-looking statements if management's beliefs,
estimates or opinions, or other factors, should change. Factors
that could cause actual results to differ materially from those in
forward-looking statements, include market prices, exploration and
development successes, continued availability of capital and
financing, and general economic, market or business conditions.
Please see the public filings of the Company at www.sedar.com for
further information.
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