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![]() Round Up Core Shack Presentation Click here to view (PDF, 1.01 Mb)
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![]() Livengood Webslides Click here to view (PDF, 284 kb) | ![]() Resource Highlights Previous drilling totaling of 48 drill holes has produced a resource of 181 Million Tonnes @ 0.54 g/t for 3.269 Million Contained Ounces of Gold (NI 43-101). ITH's 2008 drilling results released to date indicate significant expansion of this resource. Higher grades and thicker sections intersected this year include:
ITH plans NI 43-101 update for Livengood at this seasons end. Exploration Plan and Budget for 2008 The highly encouraging results from this work to date triggered a major expansion by ITH of the planned Livengood 2008 work program. Currently ITH is focused on doubling the overall resource, converting a large portion of the inferred resources to indicated and measured and gathering the data needed to complete a preliminary economic scoping study by the middle of 2009. The 2008 Resource Definition Drill Program began in May and is expected to continue into December. ITH will utilize 2 RC drill rigs and 1 core rig operating 24 hours per day seven days per week to grid drill the Core Target area which covers an area approximately 2 km by 800 m, at nominal 75 m spacing. This program will test both the volcanic hosted and higher-grade sediment hosted targets within the main structural corridor. Third party studies are underway to forward these expansion goals and include a gold characterization study currently underway to better understand the gold occurrences and dissemination, an archeological study and an environmental base line study is part of ITH's proactive environmental stewardship plan. The Company budgets a total of $7.5 million to complete this program to increase the Company's value. Project Summary The Livengood project contains a large, bulk-tonnage target that is related to 90 million year old monzonitic intrusions, similar in age to those that host the Fort Knox deposit. This bulk-mineable deposit lies in a logistically favorable area due to its proximity to Fairbanks and location along the Elliot Highway. ITH is taking the Livengood Project to the resource definition stage and released a Canadian National Instrument compliant resource report in February 2008. Location Livengood is located approximately 120 km northwest of Fairbanks, Alaska in the Tolovana Mining District within the Tintina Gold Belt. The primary target lies in the center of the historic Livengood Placer District which has produced in excess of 500,000 ounces of gold since 1914. The property can be accessed year-round by the all weather paved Elliot Highway and secondary roads. The property has the benefit of being along the industrial route used to service Prudhoe Bay's oil and gas fields and is within eye shot of the Alyeska Oil Pipeline, a very auspicious location. Ownership The property consists of 4,375 hectares (44 km2) of a Lease with the State of Alaska, Leases with individuals for State and Federal claims and a Lease with individuals for private lands. International Tower Hill Mines Ltd ("ITH") controls 100% of the property package which is subject to sliding scale royalty, land payments and work commitments. Environmental and Cultural Concerns The State of Alaska and Bureau of Land Management both provide transparent permitting processes which promote responsible modern exploration and mining techniques in Alaska. ITH is committed to the environment and community of Alaska and commissioned an archeological study and an environmental base line study of the property as part of the Company's proactive stewardship plan. Property Background The Livengood Property has been prospected, explored and placer mined by several companies and private individuals since the 1970s with 19 holes drilled prior to AngloGold Ashanti (U.S.A.) Exploration Inc. acquisition in 2003; which marked the first application of modern exploration techniques in the area. AngloGold drilled 12 RC and core holes defining and confirming the broad large-tonnage gold system. Studies conducted by the State of Alaska Division of Geological and Geophysical Surveys in 2004 defined the source area for the placer gold in the Livengood District as the target for the large bulk-tonnage system subsequently under deeper investigation by ITH. ITH acquired Livengood from AngloGold in August of 2006, aggressively drilled the gold anomalies and in return discovered a significant ore body. ITH drilled 7 core holes in 2006 and 15 core holes in 2007 to produce the first resource estimation on the property of NI 43-101 Compliant 3.1 million ounces of contained gold and defined the Core Target area (Figure 1) within the original gold in soil anomaly. ITH's 2008 Resource Definition drilling program calls for step out and infill drilling of the Core Target area (Figure 1).
click to enlarge Figure 1 Livengood project area with the surface gold anomaly shown with respect to the Core Target area currently under resource expansion drilling by the Company.
click to enlarge Figure 2 Livengood's core zone will be drilled on nominal 75 m centers as part of the 140,000 m 2008 Resource Definition Program. This drilling targets the primary structural zone of the deposit identified to date. Resource Definition Summary In 2007 ITH delivered a NI 43-101 inferred resource of 188 Mt of material are present at an average grade of 0.54 g/t gold and 0.30 g/t silver for a total of 3.269 M oz of gold and 1.789 M oz of silver. Mineralization has not been closed off in any direction; there is expansion potential with just 20 percent of the Core Target area tested so far. This is a significant, new resource and the focus of ITH's 2008 Alaska program and budget.
Table 1 Livengood Global Inferred Resource*
Mineral resources which are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental, permitting, legal, marketing, or other relevant issues.
Preliminary gold characterization results indicate very high, rapid cyanide extractions for the oxide and weakly oxidized ores (averaging 96.7%). The results of cyanide extraction tests carried out on selected samples are outlined in. Samples were selected to represent variations in the grade, degree of oxidation and alteration style. The results show that the gold is readily recovered from the oxidized and partially oxidized ore types with lower recoveries from un-oxidized ores. ITH has ordered further testing to determine the heap leach potential for the Livengood ore as well as additional testing of the un-oxidized ore to determine the optimum and most cost effective extraction method.
Table 2
Preliminary Cyanide Extraction Results*
Mineralization and Deposit Type Local mineralization consists of gold in multiple stages of quartz veins associated with variable amounts of pyrite, arsenopyrite, stibnite, and minor to trace amounts of other sulfides (Figure 3). Vein and disseminated mineralization are spatially and possibly genetically associated with dikes and sills of monzonite, diorite, and syenite composition and are hosted by sediments and volcanoclastic units. These host rocks consist of three, thrust-bound assemblages that include Devonian sediments and volcanics, Cambrian mafic rocks, and basement Paleozoic to Proterozoic sediments and volcanics. This entire sequence was intruded by a series of ~90 million year old dikes and sills (Fort Knox/Tintina Gold Belt age).
click to enlarge Figure 3 Quartz-stibnite-arsenopyrite vein in albite altered crystal lithic tuff. This sample is from hole MK-08-18 at 134m depth. Mineralization at Livengood is both stratigraphically and structurally controlled (Figure 4) and associated with a series of NW trending faults. Mineralization has been found in three styles; stratiform volcanic-hosted, stratiform sediment-hosted and intrusion-hosted. Gold occurs as native gold in association with pyrite, albitic alteration and quartz veining. Within the stratiform bodies higher grade zones (+1g/t Au) are developed along structural feeder zones. Geologically, the sediment-hosted mineralization displays strong similarities to the world-class gold deposits of Nevada.
click to enlarge Figure 4 Cross section with simplified geology displayed at the PDAC 2008 Core Shack. Note that the Au ppm values, to the right of the hole trace, are greater when mineralized dikes (left of hole trace in red) coincide with the main volcanic unit. More figures can be seen by viewing the PDAC 2008 Presentation link on the ITH website.
Table 3
Summary of all Livengood Drill Holes in Core Target Area (as of July 23, 2008)*
Table 4
2008 Significant Drill Intercepts with in the Core Target Area as of July 23, 2008.
click to enlarge Figure 5 Livengood drill hole plan map of the Core Target area as of July 23, 2008. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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