A New .Mexican 8peci.il from Socorro, dated the UJth, days: “Great excitement has l**jn occasioned on account of a rich strike being made in the Iron Mask mine, in the Magdalena district. A face of three feet of copper glance, assaying 2,000 ounces of silver to the ton, hue be*n struck In the face of the main drift The extent of thcorc body is not known, hut it must lie immense. Pro|H?rty in the district that one week ago wna of no value whatever is now held at the most fabulous prices.