23:21:35 EDT Tue 30 Apr 2024
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Nevada Sunrise Metals Corp
Symbol NEV
Shares Issued 99,834,376
Close 2023-06-05 C$ 0.125
Market Cap C$ 12,479,297
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Nevada Sunrise's Gemini met tests recover up to 90.2%Li

2023-06-05 10:43 ET - News Release

Mr. Warren Stanyer reports

NEVADA SUNRISE ACHIEVES 90.2% LITHIUM RECOVERY IN METALLURGICAL TESTING, GEMINI LITHIUM PROJECT, NEVADA

Nevada Sunrise Metals Corp. has released the results of metallurgical testing carried out on lithium mineralization from its 100-per-cent-owned Gemini lithium project located in the Lida Valley basin in Esmeralda county, Nevada. A novel method of small-scale column testing achieved a 90.2-per-cent lithium extraction rate under the direction of Willem Duyvesteyn, of Extractive Metallurgy Consultancy LLC, based in Reno, Nev. Mr. Duyvesteyn utilized the facilities of McClelland Laboratories Inc. in Sparks, Nev., for the metallurgical tests.

Highlights of Gemini metallurgical testing:

  • Preliminary leaching testwork was designed to focus on obtaining a lithium leach extraction of more than 80 per cent. Early tests included a standard sulphuric acid leach, the releach of residues, a hot acid beaker leach of low and high-grade mineralization, and a gypsum/lime roast water leach;
  • Following the use of various extraction methods an acid-bake step was implemented using concentrated sulphuric acid on moist lithium-in-sediment mineralization with average lithium values of approximately 1,100 parts per million (ppm) lithium;
  • A one-metre-tall column was loaded with Gemini clay mineralization and an open-circuit system employed a two-step leaching system, which achieved a 90.2-per-cent lithium extraction over a 25-day period.

The 90.2-per-cent lithium extraction rate achieved from the Gemini mineralization compares favourably with the average lithium extraction of 84 per cent reported by Lithium Americas at its Thacker Pass lithium project (source: Feasibility study, National Instrument 43-101 technical report for the Thacker Pass project, Humboldt county, Nevada, United States, by D. Roth et al., dated Nov. 2, 2022). As follow-up to the successful outcome of this small-scale column testing, Mr. Duyvesteyn has designed a larger-scale test involving 50 kilograms of Gemini clay mineralization, which began in late May, 2023. The larger test will employ selected higher-grade mineralization averaging approximately 2,000 ppm lithium.

Mr. Duyvesteyn and McClelland are carrying out further studies to assess the production of high-purity lithium carbonate from the column leach solutions. Both conventional precipitation methods and a modified direct lithium extraction (DLE) technique, utilizing proprietary lithium absorbents, are under consideration.

Testing carried out by McClelland on lithium-in-water samples collected from the 2022 to 2023 drilling at Gemini has revealed that the presence of suspended, submicron-sized clay particles carrying lithium are not amenable to a DLE extraction process. Nevada Sunrise will continue to collect and analyze water samples from future drilling programs to evaluate potential for a DLE process on the groundwater encountered at Gemini.

About the 2022 to 2023 Gemini drilling program

In March and April, 2022, Nevada Sunrise drilled two RC (reverse circulation) boreholes for a total of 2,020 feet (615.85 metres) in its maiden drilling program at Gemini. The drill sites were located within a defined gravity low that hosts conductive layers detected by historical ground electromagnetic surveys. The results from the first two holes at Gemini represented a new discovery of lithium mineralization in the western Lida Valley, which was not historically drill tested for lithium (see Nevada Sunrise news release dated May 18, 2022). In July, 2022, Nevada Sunrise received a permit for an expanded drilling area from the Bureau of Land Management (BLM), good until July, 2024, and began phase 2 drilling at Gemini in October, 2022. Three additional boreholes were completed from October, 2022, to April, 2023, with each intersecting lithium mineralization (see Nevada Sunrise news release dated May 24, 2023).

Nevada Sunrise believes that the southern and western parts of the Gemini basin are highly prospective for additional lithium mineralization, and that further drilling could eventually define a large lithium resource. The company is in discussions with a Vancouver, B.C.-based engineering firm to commission a National Instrument 43-101-compliant resource estimate and a preliminary economic assessment (PEA) of the lithium-bearing zones at Gemini.

About Gemini

Gemini consists of 582 unpatented placer and lode claims located in the western Lida Valley, Esmeralda county, approximately six miles (10 kilometres) east of the town of Lida, Nev. The Lida Valley is a flat, arid basin with a similar geological setting to the better-known Clayton Valley basin, where Albemarle Corp. operates the Silver Peak lithium brine mine, which has operated continuously since 1966.

Gemini is situated adjacent to the Gold Point solar energy zone, a BLM land reserve set aside for solar and wind power generation projects until 2033. Exploration at Gemini is complemented by the company's 80.09 acre-foot-per-year water right, a prerequisite for the exploration and development of lithium brine projects in Nevada.

Sampling and analytical quality assurance/quality control and statement of qualified person

Sediment sample collection and analysis

Sediment samples described in this new release are a composite of material collected from the rotary splitter in the RC drilling rig, which produces a continuous, representative three-to-five-kilogram sample for each sample interval. Samples were submitted to American Assay and ALS Global USA in Reno, Nev., and were analyzed utilizing a multielement ICP-AES (inductively coupled plasma atomic emission spectroscopy) method. Specifically, the analytical method involves aqua regia digestion of the sample followed by the inductively coupled plasma (ICP) technique to ionize the sample, and atomic emission spectrometry (AES) to determine elemental concentrations. Duplicates, field blanks and certified reference standards were inserted at regular intervals in the sample stream to ensure accuracy of the analytical method.

The scientific and technical information contained in this news release has been reviewed and approved by Mr. Duyvesteyn, MSc, who is a qualified person for Nevada Sunrise as defined in National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

About Nevada Sunrise Metals Corp.

Nevada Sunrise is a junior mineral exploration company with a strong technical team based in Vancouver, B.C., Canada, that holds interests in gold, copper, cobalt and lithium exploration projects located in the state of Nevada, United States.

Nevada Sunrise owns 100-per-cent interests in the Gemini, Jackson Wash and Badlands lithium projects, with no applicable royalties, all of which are located in the Lida Valley in Esmeralda county, Nevada.

The company owns Nevada water right permit No. 86863, also located in the Lida Valley basin, near Lida, Nev.

The company's key gold asset is a 20.01-per-cent interest in a joint venture at the Kinsley Mountain gold project near Wendover, Nev., with CopAur Minerals Inc. Kinsley Mountain is a Carlin-style gold project hosting a National Instrument 43-101-compliant gold resource consisting of 418,000 indicated ounces of gold grading 2.63 grams per tonne (g/t) Au (gold) (4.95 million tonnes), and 117,000 inferred ounces of gold averaging 1.51 g/t Au (2.44 million tonnes), at cut-off grades ranging from 0.2 g/t to two g/t Au.

Nevada Sunrise has the right to earn a 100-per-cent interest in the Coronado VMS (volcanogenic massive sulphide) project, located approximately 48 kilometres (30 miles) southeast of Winnemucca, Nev. The company owns a 15-per-cent interest in the historic Lovelock cobalt mine and the Treasure Box copper properties, each located approximately 150 kilometres (100 miles) east of Reno, Nev., with Global Energy Metals Corp. currently holding an 85-per-cent participating interest. A transaction is in progress for Global Energy to own a 100-per-cent interest, scheduled to close on or before June 30, 2023.

We seek Safe Harbor.

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