Cypress Begins Drill Program at Dean Lithium Claystone Project in Clayton Valley, Nevada; Completes Water Solubility Study
(Thomson Reuters ONE) -
VANCOUVER, British Columbia, Feb. 14, 2017 (GLOBE NEWSWIRE) -- Cypress
Development Corp. (TSX-V:CYP) (OTCBB:CYDVF) (Frankfurt:C1Z1) ("Cypress" or the
"Company") is pleased to announce it has commenced mobilization of a drilling
program to explore for depth extensions of outcropping lithium mineralization
in uplifted basin evaporite bearing mudstone and claystone at its 2,700 acre
"Dean" Project located in the central Clayton Valley of Nevada.
Cypress Clayton Valley Lithium Project, Nevada location map:
http://www.cypressdevelopmentcorp.com/i/maps/CYP-Clayton-topo-satalite-small.jpg
The Company's Dean Project is located to the immediate east of lithium brine
wells belonging to the Albemarle Silver Peak Mine with Cypress' Glory Project
located to the immediate south and Advantage Lithium's/Nevada Sunrise's project
located to the immediate north.
Extensive sampling by Cypress at the Dean Project has identified strong lithium
mineralization up to 3,700 ppm lithium (1.98% lithium carbonate equivalent) in a
highly soluble uplifted lakebed mudstone and claystone in the 2 square kilometer
Frontera Verde Zone that averages 1,500 ppm lithium (0.80% lithium carbonate
equivalent) at surface.
Outcropping lithium-rich mudstones at Dean Project:
http://www.cypressdevelopmentcorp.com/i/photos/DEAN-
CYP_Clayton_Valley_Lithium_Mineralized_Claystone.jpg
The U.S. Bureau of Land Management has approved 12 exploration drill hole
locations into the Dean Frontera Verde Zone. Cypress plans to drill the 12
vertical holes using NQ diamond drill core methods of approximately 2 inch
diameter core. Morningstar Drilling of Three Forks, Montana will complete the
drilling. Drilling is expected to begin on or about February 15, 2017.
In addition to planning and starting the Dean drill program, Cypress has been
closely analyzing the chemistry of the known mineralized rocks by conducting a
detailed study comparing Cypress' original assays (total extraction four-acid
assays) to the results of selective leach extraction deionized water assays.
Deionized water is water of neutral pH and is basically identical to rain water
or distilled water.
The finding of the study can be summarized as extremely encouraging for the
planning of future more advanced lithium extraction investigations. The results
of this latest study are presented below.
Analysis of Deionized Water Leach Assay Results from Dean Lithium Project
Summary:
A total of fifty surface samples from the Dean property have been analyzed by
ALS Chemex's lab in Reno, Nevada using method ME-MS03. This method involves
using deionized water as the leach agent for extraction of easily soluble
minerals and other element ions that are present in the prepared rock sample
pulps.
The purpose of this work was an initial evaluation of extraction of lithium and
other elements from the samples using water only. The important questions to
answer in this study were the solubility of lithium in water and also the
solubility of other associated evaporite elements such as sodium, potassium,
magnesium and calcium.
Data, Methodology and Results:
The core data for this study were assay results from two fundamentally different
assay procedures. The methods are;
1. ME-ICP61 method known as a four acid assay as it uses a mixture of acids to
completely dissolve the sample in a highly corrosive solution of acids. The
resulting solution is then analyzed for the amounts of individual elements
present, here expressed as percent (%). This assay method produces a
complete accounting of the make-up of the rock being assayed, nothing is
left behind. This is known as complete digestion.
2. ME-MS03 method which uses only deionized water as the leaching solution.
Assay results from this method will be entirely dependent of the solubility,
in water, of the minerals or ion complexes that occur in the sample. This
method will not extract elements from many minerals including silicates,
sulfides, carbonates etc.
The results of this study are formed by comparing the assays from these two very
different methods for the elements of importance in the Clayton Valley; lithium
(Li), magnesium (Mg), calcium (Ca), potassium (K) and sodium (Na).
An ideal outcome of a water leach assay would be a large percentage extraction
of lithium along with a low percentage extraction of other evaporite elements,
especially magnesium and calcium, versus the assays of these elements in the
four acid method.
The results of the fifty deionized water leach assays show exactly that, strong
extraction of lithium with very low extraction of magnesium and calcium. The
water and soluble element "synthetic brine" produced for assay from the samples
has very similar chemistry to that of reported chemistry of production brines
from the Clayton Valley and to brines reported by Pure Energy Minerals within
their northern resource area.
This similarity of the "synthetic brine" from the Cypress deionized water leach
assay (ALS Chemex method ME-MS03) compared to production and resource brines in
the Clayton Valley is most clearly seen in the ratios of lithium vs. other
evaporite elements in solution. These ratios are the standard reporting
structure for the evaluation of the chemical quality of brines worldwide. In
particular, relatively high amounts of lithium in comparison to the amount of
magnesium and calcium in solution that are critical parameters in evaluating the
suitability of a brine for processing using both traditional and new-era lithium
production processes.
For Cypress, the comparison of the lithium to calcium, sodium, potassium and
magnesium ratios for our deionized water leach brine, or synthetic brine, to the
same ratios for both production brines and brines included in lithium resource
estimates within the Clayton Valley is of critical importance in providing a
first order estimation of the suitability of these synthetic brines for lithium
extraction processing using either the traditional evaporation and precipitation
process similar to Albemarle's Silver Peak Mine or for possible processing in
one of the new processes being developed by Pure Energy Minerals.
Cypress used public data that exists for a number of samples of these production
and resource brines for this study. These data came from Pure Energy's July
28, 2015 NI 43-101 Technical Report on its Clayton Valley South lithium project
and from subsequent news releases by Pure Energy Minerals. The inclusion of
chemical data on Albemarle's production brines was possible by examining public
data on these brines which are reported as part of Albemarle's annual reporting
requirements to the Nevada Department of Environmental Protection and to the
State of Nevada Water Resources.
The key results of the Cypress solubility study are presented below beginning
with a side by side comparison of assays (in percentage) of the important
elements in the rock samples as reported by ALS Chemex for the two different
assay methods. The pairs of numbers for each method represent the average for
the fifty samples in the study:
Water Solubility of Lithium from Surface Rock Samples Comparison of Assays from
Four Acid Digestion and Distilled Water Methods:
Lithium Magnesium Calcium Potassium Sodium
ME- ME- ME- ME- ME- ME- ME- ME- ME- ME-
ICP61 MS03 ICP61 MS03 ICP61 MS03 ICP61 MS03 ICP61 MS03
Li Li Mg Mg Ca Ca K K Na Na
0.12 % 0.05 % 2.12 % 0.14 % 4.87 % 0.11 % 4.54 % 0.29 % 3.59 % 2.90 %
The results from the table above show that the deionized water leach assay
method would result in a water solution containing an average of 0.05% Li,
0.14% Mg, 0.11% Ca, 0.29% K, and 2.9% Na. These results are compared to other
basin brine chemistries below in this study. The values are straight assay
values for the elements as found in the deionized water solution used in the
assay procedure.
The study looked at the solubility of each of the important elements in a
fashion which compares the complete extraction of each element in the four acid
method versus the partial extract using only deionized water.
As the chart below clearly shows, two elements, lithium and sodium, show strong
solubility into water versus a four acid solution while the remainder of the
elements show remarkably low solubility in water versus a four acid solution.
The difference is significant and the result is that a water solution is
created which contains approximately 42% of the lithium and 81% of the sodium of
the original rock but contains only trace amounts of the undesirable elements
magnesium, calcium and potassium, all of which are less than 1%.
Solubility in Deionized Water vs. 4 Acid Digestion:
Element % Solubility
Lithium 42.00 %
Magnesium 0.07 %
Calcium 0.02 %
Potassium 0.06 %
Sodium 81.10 %
The table below compares the solution chemistry of the Dean deionized water
"synthetic brine" produced by ALS Chemex during the ME-MS03 assays to actual
production and resource brines in the Clayton Valley. Note that the lithium
value for the water leach solution from Dean claystones is more than double that
of the Pure Energy brine and is four times that of the Albemarle production
brine.
Element Dean Claystones CV-1 ((at)700 feet) Well 392
Lithium % 0.047 0.0204 0.012
Magnesium % 0.140 0.0464 0.031
Calcium % 0.110 0.0835 0.039
Potassium % 0.290 0.3660 0.220
Sodium % 2.90 4.14 2.50
Cypress Pure Energy Albemarle
The data is significant when comparing the chemistry of the Cypress synthetic
brine with two examples of brines from the Clayton Valley. As can be seen in
the chart above, the Cypress synthetic brine is materially higher in lithium
than the resource brine of Pure Energy Minerals or the production brine of
Albemarle's Silver Peak Mine.
The results needed to be viewed in relation to the other elements to more
clearly see if these three different solutions containing lithium and other
elements are truly similar. To do this, Cypress looked at ratios of lithium
with the other elements in each sample. This produced the critical metal ratios
which are used for the evaluation of the processing characteristics of brines in
terms of efficiency of lithium extraction from the mineral brines.
The metal ratios for each of the three mineral brines are presented below:
Ratio Dean Claystones CV-1 ((at)700 feet) Well 392
Mg/Li 2.98 2.27 2.58
Ca/Li 2.34 4.09 3.25
K/Li 6.17 17.94 18.33
Na/Li 61.70 202.94 208.33
Cypress Pure Energy Albemarle
Conclusions:
The ratio data above compares in an effective way the chemistries of a synthetic
brine made from surface outcropping claystones on the Cypress Dean property with
basin brines of the Clayton Valley. The ratios suggest that the synthetic brine
is chemically very similar to the two selected basin brines. This is
particularly true in the critical magnesium/lithium (Mg/Li) ratio where the
total range of values for the three solutions falls within a narrow range.
The following points are apparent and supported by the mineral solubility data:
1. It appears that a lithium bearing mineral solution that is chemically
similar to the production and resource brines of the Clayton valley can be
produced by the leaching of surface exposed evaporate stratigraphy in water.
2. Comparison of ratios with other important elements also shows the Dean
"Synthetic Brine" to compare favorably with basin production brines.
3. The data provides further strong support for the idea that the production
brines of the basin are being continuously recharged by leaching of lithium
and other elements from the uplifted and exposed former lake basin sediments
that outcrop in a wide belt along the east margin of the Clayton Valley.
4. This recharge mechanism strongly supports the importance of the outcropping
and buried claystones as a very significant lithium source rock. Our
chemistry work-up as presented here shows how rain water would extract
lithium and sodium from the uplifted, mineralized basin sediments at much
higher rates than the extraction of magnesium and calcium. This process
would neatly account for the chemistry of basin production brines versus the
chemistry of source rock claystones.
5. The potential for the existence of ground water mineral brines under and
immediately adjacent to the exposed belt of lithium rich rocks is high as
the water flow pathways for the recharge system are likely to be vertical as
well as horizontal.
Don Huston, President of Cypress Development, stated: "Assays from surface
sampling at the Dean Project have returned extremely encouraging results in the
form of widespread high lithium mineralization hosted within highly reactive and
soluble rock units. We have now completed detailed analysis of the results of
several different assay methods as a first order study of potential extraction
methods of the lithium from the host rock sequence. This study highlights the
similarity of the solutions made from dissolving the surface claystone in water
compared to production brines of the basin. The results of the study strongly
indicate that recovery of lithium from a solution from the outcropping
evaporates and water could potential be done by methods currently being used in
the Clayton Valley and by new methods under development by Pure Energy Minerals
and others."
Robert Marvin, PGeo, Exploration Manager for Cypress Development Corp., is the
qualified person as defined by National Instrument 43-101 and has approved of
the technical information in this release.
About Cypress Development Corp.:
Cypress development Corp is a publicly traded lithium and zinc exploration
company that continues to acquire and develop potentially viable mineral
projects in the State of Nevada, U.S.A.
Cypress is very active in Clayton Valley, Nevada with its team committed to
systematically exploring its properties for both a lithium-brine resource and
expanding exploration relating to the potential for a lithium resource that
exists within the large area of non-hectorite "claystones" discovered at surface
that has seen recent high lithium assays recovered from these same "claystones".
Cypress Development Corp. has approx. 33.4 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.
"Don Huston"
DONALD C. HUSTON
President
For further information contact myself or:
Don Myers
Director
Cypress Development Corp.
Telephone: 604-687-3376
Toll Free: 800-567-8181
Facsimile: 604-687-3119
Email: info(at)cypressdevelopmentcorp.com
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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.
This announcement is distributed by Nasdaq Corporate Solutions on behalf of Nasdaq Corporate Solutions clients.
The issuer of this announcement warrants that they are solely responsible for the content, accuracy and originality of the information contained therein.
Source: Cypress Development Corp via GlobeNewswire
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