TARON DRILLHOLE ASSAYS (1)
SILVER -- ZINC -- THALLIUM
1. Weighted Average
2. M = metres
3. ppb = parts per billion
4. ppm = parts per million = gram
5. Casing to 8 metres
6. Casing to 21 metres
7. True thickness unknown
DETAILS OF THE DRILL PROGRAM
Please refer to the Cascadero Copper news release of November 9th 2009 for a complete description of the drill program. That news release announced the discovery of cesium and rubidium values in the same drill holes that are the subject of this release. The silver, zinc and thallium values occur, along with cesium and rubidium values, in all seven drill holes. If, as expected, the zinc and silver values are recoverable by leaching, the by-product amount could be an important credit to the mining and processing costs. Zinc and silver values increase to the south and to the east. All holes established down dip continuity of mineralization and all holes ended in mineralization. Mineralization variably outcrops and is present in trenches over an area of 800 metres east west by 1,600 metres north south and open in all directions.
MINERALOGY AND METALLURGY
Initial mineralogy is underway by Micron Geological Ltd, North Vancouver to be followed by metallurgy tests.
THE PRINCIPAL THALLIUM COMPOUNDS AND PRICES (1)
Element - Compound
Grams Tl/kg in Formula
Thallium US$/gram (2)
Thallium Oxide ~99.5%
Thallium Bromide 99.9%
Thallium Nitrate 99.9%
Thallium Formate 99.9%
The reader should be aware that the prices quoted in Table Two are industry standard for the quoted volumes. The market price for most industrial minerals is driven by volume and it is industry practice that the larger the sale unit the lower the price per kilogram. Base and precious metal is commodity priced with actively traded markets. Zinc is currently US$1.00 per pound, which is equivalent to ~454 ppm (grams) and one troy ounce of silver is US$18.50, which is equivalent to 31.1 ppm (grams) or ~US$0.59 per gram.
Thallium is a heavy rare metal with a crustal abundance is 0.7 ppm and a specific gravity of 11.58 g/cm3. According to a recent publication by the USGS and other sources, the demand for thallium and its compounds is experiencing rapid growth. Its price has tripled in the last four years. The price for thallium metal remained high in 2008 as the supply worldwide continued to be relatively tight. The average price for high-purity granules and rod was 7% higher in 2008 versus 2007. The growth markets are in electronic and a variety of technology applications. Primary markets are still relatively small but are diverse and research continues to expand the applications of this unique metal.
There are two known thallium dominant hard rock deposits. Both are located in China. The geological setting, resource and grade estimates of the Chinese deposits are not published. Globally, various thallium minerals occur in trace amounts in carbonates, clays, soils, and granites in association with potassium minerals but thallium is not considered to be commercially recoverable in these forms. The major source of commercial thallium is the trace amounts found in copper, lead, zinc, and other sulfide ores. In the western world, thallium is recovered as a byproduct from the flue dust and residues generated during concentrate roasting and smelting primarily from zinc ores. Zinc concentrate can contain up to 40 ppm thallium.
APPLICATIONS - MARKETS - RESEARCH
Thallium is primarily used for its electrical conductivity as thallium sulfide (Tl2S), which changes with exposure to infrared light. This ability, a diodic property, makes the compound useful in photocells. Thallium bromide-iodide crystals have been used as infrared optical materials. Thallium has been used, with sulfur or selenium and arsenic, to produce low-melting glasses which become fluid between 125 and 150 C. These glasses have properties at room temperatures similar to ordinary glasses and are said to be durable and insoluble in water. Thallium oxide has been used to produce glasses with a high index of refraction, and is also used in the manufacture of photo cells. Thallium is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target and rod and compounds as sub-micron and nanopowder.
A broad range of commercial applications would become available if thallium-barium-calcium-copper oxide high-temperature superconductor materials (HTS) used in filters for wireless communications could be fabricated on a large-scale into wires having a certain degree of flexibility and strength. Currently, HTS materials are relatively brittle metal-oxide ceramics. There are now more than 50 known HTS materials, but only a few (non-thallium) have been used successfully to form long-length wires.
In medical applications, dipyridamole-thallium imaging continued to be a useful pre-operative procedure for assessing long-term cardiac risks in patients with coronary artery disease or diabetes who are undergoing peripheral vascular surgery. Further uses of radioactive thallium in clinical diagnostic applications include cardiovascular and ontological imaging. Some other thallium applications are: as an activator (sodium iodide crystal doped with thallium) in gamma radiation detection equipment (scintillometer); thallium in lenses, prisms and windows for infrared detection and transmission equipment; thallium-arsenic-selenium crystal filters for light diffraction in acousto-optical measuring devices; as an alloying component with mercury for low-temperature measurements; a catalyst for organic compound synthesis; and, a component in high-density liquids for sink-float separation of minerals depending on requirements of toxicity.
Research and development activities of both basic and applied nature, which could expand the usage of thallium, were conducted during 2008. Research discovered a new thermoelectric material that has the potential to make automobiles more efficient by converting heat wasted through engine exhaust into electricity. It is estimated that nearly 60% of the energy produced by an internal combustion engine is lost through waste heat that escapes in engine exhaust. The new material, thallium-doped lead telluride, is more than twice as effective at converting heat energy into electrical energy than is the leading thermoelectric material (sodium-doped lead telluride), which is currently used commercially. The thallium thermoelectric material also has potential for large volume uses in power generation and heat pumps.
Other research activities included the development of HTS materials for such applications as magnetic resonance imaging, storage of magnetic energy, and magnetic propulsion. In addition, thallium sulfide thin films of several different compositions were formed on both glass and polyethylene plastic. The photoconductive properties of these thin films may find use in solar batteries, solar panels and other devices. Thallium is highly sensitive to infrared radiation and this property is receiving considerable research attention.
The western world market value of thallium and its compounds is estimated at ~US$50 million per year with a ~10% annual growth rate. Usage, market size and other thallium data for China are not available.
World resources of thallium contained in zinc resources are estimated at ~17 million kilograms or ~17,000 tonnes. Large zinc reserves containing trace to low ppm values of thallium are present in Canada, Europe, and the USA. Additional 630 million kilograms of thallium is in world coal resources. The thallium content of these resources is low and the economic recovery of thallium from the majority of these resources is doubtful prior to concentration and smelting.
The Company believes that thallium is an important electronic metal with a bright future. The management of the Company feels very fortunate to have discovered a thallium deposit that has potential to develop a large and valuable resource.
QUALIFIED PERSON AND ASSAY INFORMATION
The Taron exploration program was supervised and directed by Dr. Tom Richards PhD., P.Geo who is the qualified person for the Company's Argentine exploration programs. Salta personnel conducted all logging and sampling of the drill core. Samples were first taken to the Company's office in the city of Salta then packaged and shipped by Salta personnel for preparation to ACME Analytical Laboratories in Santiago, Chile for sample preparation and then flown to ACME Analytical in Vancouver for assay.
Taron is located in northwestern Argentina and is 100% owned by Salta Exploraciones SA, which is 50% owned by Cascadero Copper.
Cascadero Copper Corp