The rocks composing the Tombstone district range from pre-Cambrian to Quaternary in age. The oldest rock in the district is a fine-grained, greenish-grey schist, evidently pre-Cambrian and correlated with the Pinal schist of Bisbee. Granitic and porphyritic rocks that have been tentatively aged as pre-Cambrian intrude the Pinal schist.
The Bolsa quartzite lies over the pre-Cambrian, and locally is about 450 feet thick. This is succeeded by about 700 feet of the Cambrian Abrigo limestone. Overlying the Abrigo is 350 feet of the Devonian Martin limestone, followed by the Mississippian Escabrosa limestone of about 500 feet thickness.
The Escabrosa limestone is not easily distinguishable from the overlying Naco Limestone of Pennsylvanian and Permian age. Up to 3000 feet of Naco limestone is known. The Naco limestone, intruded by dikes and sills of quartz latite porphyry, possibly erupted prior to deposition of the Mesozoic sedimentary units.
Overlying the Naco is the Bisbee group, consisting of conglomerate, sandstone, quartzite, shale and limestone. Fossils in these beds indicate a Mesozoic age. The thickness of the Bisbee group is unknown. Following the deposition of sediments, the Schieffelin granite and the Uncle Sam porphyry were emplaced. Last emplaced were the porphyritic andesite dikes, which occupy the NE trending shear zone structures.
Geological Report Summary *
It is the opinion of this author that the Company property located in the West Tombstone Mining District, Tombstone, Arizona could host ore bodies equal in value to the Bisbee copper mines ($19.2 billion) and the Tombstone Silver District ($847.8 million) combined.
The total reported production, in current prices, of the Bisbee district was: $19,223,418,000.00 with 3.8 million tons of copper at $16,264,000,000.00, 154,900 tons of lead at $188,978,000.00, 189,000 tons of zinc at $374,220,000.00, 2.6 million ounces of gold at $1,453,400,000.00 and 100.3 million ounces of silver at $942,820,000.00.
The reported production for the Tombstone District was $847,790,000.00 with 260 thousand ounces of gold ($145,080,000.00) 32.5 million ounces of silver ($305,500,000.00) 651 million pounds of lead ($390,600,000.00), 2.5 million pounds of copper ($5,600,000.00) and 1 million pounds of zinc ($1,010,000.00).
The results of this preliminary study indicate the potential value of the property to be substantial. Present prices, past production, known ore reserves left in place in mines due to the economic exigencies of the silver markets and engineering problems, all contribute to making the west Tombstone District an exceptional target.
The property examination and historical analyses indicate the western district has been overlooked due to undue focus on the Tombstone District to the east. Additionally, the lack of methodical, efficient exploration and mining operations carried out by previous operators in the Western District has lent a decrepit air to the western district.
The occurrence of platinum and gold values, in addition to silver and base metals, render parts of the property amenable to both open pit mining and to conventional subsurface methods of vein mining.
Less than 100 hundred acres of the property has been explored during the activities covered in this report. Observations of the mineralization, structural geology and hydrothermal alteration present on the Company property would suggest impressive discoveries to be made.
Jimmy L. Nyrehn
* Note: Report completed Feb.1, 2006. At today’s metal prices the revised total would be over $25 Billion