Mont Chemin Project
Gold-silver mineralization at Mont Chemin occurs in pyrite-bearing quartz veins typically within deformed and sheared quartz feldspar porphyry intrusive bodies. Sampling from the Goilly quartz vein in 2007 returned up to 60.8 g Au/t and pits and outcrop at nearby Tête des Éconduits gave 8.2 and 127.6 g Au/t.
An initial trenching program at the Goilly vein in 2010 resulted in five channel samples returning from 12.05 g Au/t across a true width of 0.90 m to 40.7 g Au/t across 0.55 m, with an average of about 22.5 g Au/t across 0.58 m. Samples were locally enriched in silver (up to 387 ppm), copper (up to 2,520 ppm), lead (up to >10,000 ppm), and zinc (up to 1,855 ppm). Sulphide content appears sufficient for a geophysical response and a pilot VLF-EM survey was run at the end of the 2010 field season, with further geophysics to be considered for 2011 to test for similar zones elsewhere across the property.
Gold appears to have been discovered for the first time in 1989 on the Mont Chemin property, however, iron mining and reduction works date back to the 5th to 7th centuries. Lead-silver-fluorite-(zinc) veins a few hundred meters from the Goilly vein were exploited in the late 18th century and into the mid-19thcentury with some work done again in the 1970s.
Deposition of the gold mineralization has been dated at 9.9 ± 1.0 Ma, making it one of the last Alpine metamorphic events in the north-eastern Mont Blanc massif, post-dating the lead-silver veins. 21 Notwithstanding the younger age, gold mineralization at Mont Chemin is believed to be analogous to mesothermal greenstone belt gold mineralization of Archean age in the Superior Province of Ontario and Québec, Canada, or of Proterozoic-age mineralization in the Arabian Shield.
Location, Description and Access
The Mont Chemin gold-silver Property is 100% owned by Aurania, through a wholly-owned subsidiary, AuroVallis Sarl. The Property consists of a single 31-km2 Permit located about 25 km southwest of Sion, which is about 160 km east of Geneva along the Rhône River valley.
The elevation on the Property varies from 566 m to 1,807 m above sea level (“ASL”). Approximately 20% of the Permit area is above tree line and the remainder is forest with a small amount of grazing land.
In 2006, prior to the acquisition of AuroVallis by Urania, and prior to supervision by Aurania geologists, 114 selective grab and chip samples were collected. Gold content varied between <0.01 and 72.76 ppm. The higher gold values were predominantly from known mineral areas such as the La Goilly, Scheelite and Vouillanioz pits, although there was a northeast-trending series of elevated gold values (up to 26.88 ppm Au) over 250 m in quartz vein samples to the north of the Goilly Vein. In late 2007, a pilot soil sampling program was completed over a small area covering the La Goilly, the Scheelite Pits, and the fluorite-barite-lead-zinc-silver vein system at La Crettaz. Anomalous gold, tungsten, lead and zinc generally reflect known areas of mineralization – including the Goilly Vein. Gold values (up to 105 ppb) suggested that the gold mineralization may be more extensive than presently known. Although the Goilly vein and other occurrences were detected by the survey, Urania feels that poor soil development on the Property is not conducive to reliable results. In 2010, geological mapping and prospecting identified additional prospective porphyry. Detailed mapping has been able to identify smaller tongues of porphyry adjacent to the larger body in the vicinity of the Goilly vein. In July 2010, the Goilly vein was trenched using a backhoe, exposing 8 m of strike length and about 5 m down-dip. The vein strikes at 060° and dips at 35° to the southeast. Five channel samples returned from 12.05 g Au/t across a true width of 0.90 m to 40.7 g Au/t across 0.55 m, with an average of about 22.5 g Au/t across 0.58 m. Samples were locally enriched in silver (up to 387 ppm), copper (up to 2,520 ppm), lead (up to >10,000 ppm), and zinc (up to 1,855 ppm).
The sulphide content observed within the Goilly vein during trenching appears sufficient for a geophysics response. Late in the 2010 field season a grid was set up and a pilot VLF-EM survey was conducted over the Goilly area. The station transmitting the required signal was very weak and results are being analysed. Additional geophysics is planned for 2011.
Proposed Programs and Budgets
The proposed Phase 1 program in 2011 includes an initial 1,000 meter diamond drilling program seven to eight holes to test the down dip extension of the Goilly vein, under the Scheelite and Vouillanioz pits, and along the finger of porphyry where the Goilly vein and other gold showings have been identified. Additional proposed work consists of induced polarization surveying over an area of 300 m x 750 m around the Goilly vein, as well as further prospecting, mapping, and rock sampling over the prospective granite porphyry with the objective of identifying additional gold-silver mineralized quartz veins. Additional trenching will be done on specific targets where feasible. The estimated Phase 1 budget is C$670,000.
Aurania has proposed a Phase 2 program contingent on the results of Phase 1. The work would consist of 1,000 m of diamond drilling to further test along strike and down dip on the Goilly vein and any other targets identified by geophysical surveys, mapping and sampling in Phase 1. The Phase 2 budget is estimated at C$600,000.
Download the NI 43-101 technical report for Aurania’s Mont Chemin project in Switzerland.