Lithium Exploration Group Announces Mineral Brine Estimate
Lithium Exploration Group Announces Maiden Resource Estimate for Valleyview Mineral Brine Project in Alberta
SCOTTSDALE, Ariz., March 22, 2012 /PRNewswire/ -- Lithium Exploration Group Inc. (OTCBB: LEXG) is pleased to announce a maiden resource estimate for its Valleyview lithium (Li), potassium (K), boron (B), bromine (Br), magnesium (Mg), calcium (Ca) and sodium (Na) brine project (the "Valleyview Project") centered around and in the vicinity of the town of Valleyview in west-central Alberta, Canada.
LEXG's Valleyview Property comprises 29 Industrial and Metallic Mineral Permits that form a single contiguous land package totaling approximately 514,000 acres, of which, LEXG retains 100% mineral rights to the Property. The Property covers a large portion of the Sturgeon Lake and Sturgeon Lake South oilfields, from which petroleum products are produced from dolomitized reefal carbonates of the Leduc Formation. Spatially associated with the oil/gas pools at depths of 3,300 to 4,000 m, the Leduc aquifer comprises Li-K-B-Br-Mg-Ca enriched sodium-chloride brines that are pumped to the surface as waste co-products by continuing oil and gas production.
The Company commissioned APEX Geoscience Ltd. to conduct the resource estimate in accordance with National Instrument 43-101 standards for the Leduc aquifer system on a portion of the Valleyview Property (the "Resource Estimate"). The Resource Estimate focused only on the eastern and southeastern portion of LEXG permits that overlay the Sturgeon Lake oilfield. Consequently, the area of study and Resource Estimate spans approximately 227,000 acres, or 44% of the total LEXG Valleyview Property permit holdings (the "Sub-Property").
The Resource Estimate is based on: 1) a compilation and review of formation water and stratigraphic data from publicly available petroleum well databases; 2) the geochemical results of LEXG's 2011 formation water sampling program where 47 wells were sampled (47 samples) within an 82 square kilometre area providing a general sample well density of 0.5 wells per square kilometre; and, 3) a hydrogeological study by Hydrogeological Consultants Ltd. to quantify the total in-place brine underlying LEXG's Property and to investigate what influences hydraulic parameters such as transmissivity (permeability x aquifer thickness) and storativity (the volume of water expelled per unit surface area as a result of a change in head) might have on resource extraction.
A total in-place formation water volume of 5.7 billion cubic metres was calculated for the Leduc Formation aquifer system underlying LEXG's Valleyview Sub-Property. By multiplying the total in-place formation water volumes by the average grades from LEXG's 2011 sampling program, the total in-place Resource Estimates comprise 384,750 tonnes of Li, 26.5 million tonnes of K, 649,800 tonnes of B, 2.3 million tonnes of Br, 134.5 million tonnes of Ca, 16.5 million tonnes of Mg, and 355.6 million tonnes of Na (Table 1). These values represent 100% recovery of the elements from the formation water and do not reflect process recoverability, which are subject to ongoing metallurgical studies. The resource estimate is inferred, in accordance with CIM standards where quantity and grade can be estimated on the basis of geological evidence and limited sampling, and geological grade continuity is reasonably assumed, but not verified. In addition, the estimate is based on limited information and sampling gathered through appropriate techniques.
Table 1. Total inferred in-place resource estimate for selected minerals within the Leduc Formation (Woodbend Group) aquifer system of Lithium Exploration Group Inc.'s Valleyview Property. The inferred resource estimate is based on a total in-place formation water volume of 5.7 billion cubic metres.
Sodium 3 (NaCl) 4
Average elemental grade (mg/L) 1
Total in-place resource and equivalent end product (tonnes) 2
1 Average grades are taken from LEXG's 2011 sampling program (n=47). 1 mg/L = 1 ppm.
2 Tonne = metric tonne = 1,000 kg (2,204.6 lbs); Ton = short ton = 907.2 kg (2,000 lbs).
Numbers may not add due to rounding.
3 Mineral resource.
4 Equivalent end product resource. Conversion factors: Li x 5.323 = Li2CO3, K x 1.2046 = K2O,
B x 3.2202 = B2O3, Ca x 1.3992 = CaO, Mg x 1.6582 = MgO, Na x 2.542 = NaCl
Note 1: Values represent 100% recovery of the minerals from the formation water and do not
reflect process recoverability, which are subject to ongoing metallurgical studies.
Note 2: Mineral resources which are not mineral reserves do not have demonstrated economic
viability. The estimate of mineral resources may be materially affected by geology,
environment, permitting, legal, title, taxation, socio-political, marketing or other relevant
Note 3: The quality and grade of reported inferred resource in this estimation are uncertain in
nature and there has been insufficient exploration to define these inferred resources as
an indicated or measured mineral resource, and it is uncertain if further exploration will
result in upgrading them to an indicated or measured resource category.
Of the total in-place formation water volume (5.7 billion cubic metres), hydrogeological characterization of the Leduc reservoir on LEXG's Sub-Property indicates that at an effective transmissivity of 1.0 m²/day and corresponding storativity of 6.0 x 10-5, an inferred Recoverable brine volume of approximately 176 million cubic metres (or 3.1% of the total in-place brine) could theoretically be pumped from the Leduc aquifer system to 200 m of the available drawdown within LEXG's Sub-Property over the next 20 years. A transmissivity of 1.0 m2/day is considered to be the most realistic interpretation from the available data, however, transmissivity can also be bracketed by minimum and maximum transmissivity values such that the expected Recoverable brine over 20 years ranges from 71.8 million cubic metres (1.3% of the total in-place brine) to 258.5 million cubic metres (4.6% of the total in-place brine). Recovery of minerals, assuming 100% recovery, from the 1.3%, 3.1% and 4.6% Recoverable brine volumes is presented in Table 2. The Recoverable values are subject to change because the values can be influenced by a number of factors including changes to the transmissivity by advanced pressure tests, mineral recovery methodology, regulatory extraction policies and the reinjection of treated formation water back into the reservoir, which would limit the hydraulic depression caused by pumping such that a considerably greater volume of brine could be recovered.
Table 2. Hypothetical mineral and end product resources that could be expected to be recovered over 20 years based on a range of calculated effective transmissivities (permeability x aquifer thickness) as determined from publicly available data. The table illustrates the sensitivity of the recoverable resource with changes in the applied yield quotient.
Recoverable resource and recoverable end product (tonnes)
Inferred recoverable volume of brine using an applied 20 year yield
Lithium 2 (Li2CO3) 3
Potassium 2 (K2O) 3
Boron 2 (B2O3) 3
Bromine 2 (Br2) 3
Calcium 2 (CaO) 3
Magnesium 2 (MgO) 3
Sodium 2 (NaCl) 3
71.8 million m3 of brine, or 1.3% of the total in-place volume 1
176.0 million m3 of brine, or 3.1% of the total in-place volume 1
258.5 million m3 of brine, or 4.6% of the total in-place volume 1
1 The total in-place volume of formation water is 5.7 billion m3
2 Recoverable mineral resource
3 Recoverable end product calculated using the following standard conversion rates as determined by the chemical composition of the final
product, and are independent of price and extraction processes: Na x 2.542 = NaCl, K x 1.2046 = K2O, Ca x 1.3992 = CaO,
Mg x 1.6582 = MgO, B x 3.2202 = B2O3, Li x 5.323 = Li2CO3.
4 Based on using 50 of 52 drill stem tests from 41 wells; two tests yielded unreliable values; represents the minimum transmissivity value
5 Based on regional formation water modelling, resulting in a reasonable correlation between calculated fluid levels and pressure survey levels
reported in 1994 and 1997; considered to be the most realistic interpretation from the available data
6 Based on 99 core analysis; represents the maximum transmissivity value
Note 1: Recoverable tonnages values represent 100% recovery of the mineral from the formation water and do not reflect process recoverability,
which is subject to ongoing studies.
Note 2: Figures may not sum due to rounding. Significant figures do not indicate added level of precision.
Note 3: Mineral resources which are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources
may be materially affected by geology, environment, permitting, legal, title, taxation, socio-political, marketing or other relevant issues.
Note 4: The quality and grade of reported inferred resource in this estimation are uncertain in nature and there has been insufficient exploration to
define these inferred resources as an indicated or measured mineral resource, and it is uncertain if further exploration will result in
upgrading them to an indicated or measured resource category.
"We are excited to have this maiden resource finalized. With this milestone complete we can move to the next steps of bringing this resource to a preliminary economic assessment, which will begin immediately," commented CEO Alex Walsh . "We are proving that the production of lithium and other valuable minerals from oil field brine in Alberta is inevitable and we are in a strong position to be first to market."
The independent brine resource estimated by APEX Geoscience Ltd. is consistent with the standards set out in Canadian Securities Administrators' National Instrument 43-101 and the Company is treating the inferred brine resource estimate as a National Instrument 43-101 resource estimate. The Company has published a report consistent with the format of a National Instrument 43-101 Technical Report, which will incorporate the brine resource estimate, on its website at www.lithiumexplorationgroup.com. Mineral resources that are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by geology, environment, permitting, legal, title, taxation, socio-political, marketing or other relevant issues.
The resource model and brine resource estimate was completed and/or supervised by Mr. Michael B. Dufresne , M.Sc., P.Geol., President of APEX Geoscience Ltd. of Edmonton, Alberta, who is an 'Independent Qualified Person' as defined in the instrument and who has reviewed and approved of the contents of this news release.
Lithium Exploration Group is a US based exploration and development company focused on the acquisition and development potential of lithium brines and other precious metals that demonstrate high probability for near-term production. Currently the company is focused on its Western Canada and South America properties. Lithium Exploration Group is a fully reporting company traded on the OTCBB under the symbol LEXG. Website: www.lithiumexplorationgroup.com. Lithium Exploration Group is also now on Facebook, LinkedIn and Twitter @LEXG_OTCBB.
Safe Harbor Statement
This news release contains "forward-looking statements," as that term is defined in Section 27A of the United States Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Statements in this press release that are not purely historical are forward-looking statements and include any statements regarding beliefs, plans, expectations or intentions regarding the future, including but not limited to the completion, testing, transportation, and final installation of the unit, the acquisition of additional capital, and the completion of any resource estimates or a feasibility study.
Cautionary Note to US Investors – The United States Securities and Exchange Commission permits US mining companies, in their filings with the SEC, to disclose only those mineral deposits that a company can economically and legally extract or produce. We use certain terms in this release, such as "measured", "indicated", and "inferred resources", which the SEC guidelines strictly prohibit US registered companies from including in their filings with the SEC. US Investors are urged to consider closely the disclosure in our Form S-1 or Form 10-K which may be secured at http://www.sec.gov/edgar.shtml.
Actual results could differ from those projected in any forward-looking statements due to numerous factors. Such factors include, among others, the inherent uncertainties associated with mineral exploration and difficulties associated with obtaining financing on acceptable terms. We are not in control of lithium prices and these could vary to make development uneconomic. These forward-looking statements are made as of the date of this news release, and we assume no obligation to update the forward-looking statements, or to update the reasons why actual results could differ from those projected in the forward-looking statements. Although we believe that the beliefs, plans, expectations and intentions contained in this press release are reasonable, there can be no assurance that such beliefs, plans, expectations or intentions will prove to be accurate. Investors should consult all of the information set forth herein and should also refer to the risk factors disclosure outlined in our most recent annual report for our last fiscal year, our quarterly reports, and other periodic reports filed from time-to-time with the Securities and Exchange Commission.
SOURCE Lithium Exploration Group
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