Millrock and Vale Exploration Canada Inc. Working at Galiuro Copper-Gold Project, Arizona
Millrock Resources Inc. announce the Company has successfully collaborated with its Galiuro project partner, Vale Exploration Canada Inc., an affiliate of Vale Inco Limited, each a wholly-owned subsidiary of Companhia Vale do Rio Doce, to complete a March 2009 geological mapping program. An airborne geophysical survey is set to take place in April 2009. These exploration programs are being carried out on the Galiuro property to obtain information required for an initial drilling campaign on the property, which is located in southeastern Arizona.
Field work for the mapping program occurred from March 4 to March 19, 2009 and was based out of Mammoth and Klondyke, Arizona. The exploration team consisted of two crews working from opposite sides of the large property to accomplish the goals of the program. Millrock is the exploration operator with VEC staff seconded to the project. The work was efficiently carried out using handheld computers with internal GPS receivers and pre-loaded digital base maps. Preliminary mapping results highlights include:
– Estimated thickness of post-mineral Tertiary volcanics of less than 250 meters – Existence of porphyry-style alteration in pre-mineral rocks on the property – Presence of porphyry copper alteration on both sides of volcanic cover
– Epithermal copper occurrences cluster near major structures, and may be related to porphyry copper mineralization at depth
Millrock and VEC have chosen to fly an airborne Z-Axis Tipper Electromagnetic (ZTEM) and magnetic survey of the Galiuro property. ZTEM was selected for its ability to achieve unparalleled resolution and depth of investigation beneath volcanic cover. The system is well suited to imaging buried porphyry deposits and magnetics will aid in geological interpretation. The airborne ZTEM and magnetic survey has been contracted to Geotech Ltd. of Aurora, Ontario, Canada and is on-track to occur during April 2009.
The target at the Galiuro project is a giant, high-grade porphyry copper-gold-molybdenum deposit that can be mined by open pit or block caving mining methods. The project is situated 80 kilometers southeast of the Resolution deposit, which is currently being explored by Rio Tinto, and is reported to contain an Inferred Resource of 1.34 billion tonnes containing 1.51% copper and 0.04% molybdenum. The Galiuro claim block is situated on the San Manuel-Copper Creek porphyry copper trend. The Copper Creek mine is situated just to the west of the claim block and a very large, intense alteration zone occurs to the east. The claims are largely underlain by Tertiary-aged post mineralization volcanic rocks. Magnetic data suggests that intrusive complexes occur beneath the volcanic cover. Epithermal copper mineralization occurs along deep seated structures within the volcanic rocks on the property, and may have been related to older Laramide-aged porphyry mineralization at depth.
The Galiuro property is 16 kilometers east of Mammoth, Arizona and 80 kilometers northeast of Tucson. Topography is steep and rugged at elevations ranging from 4200 to 5500 feet. Paved highway 77 passes 18 kilometers west of the claim block and access to the edge of the claim block is provided by four wheel drive access.
