Esperanza Resources – Cerro Jumil, Morelos state, central Mexico – January 2013
Neil Adshead visited the Cerro Jumil gold-silver development project in Morelos state, central Mexico, in early January 2013. The project is close to the city of Cuernavaca and 2 km from the pre-Columbian, UNESCO World Heritage site of Xochicalco(http://en.wikipedia.org/wiki/Xochicalco).
Esperanza Resources’ 100% owned precious metal-rich skarn deposit was formed when a felsic igneous intrusion pushed upwards into, and cooked, a thick sequence of limestone. The carbonate-rich host rock was transformed by the heat and hydrothermal solutions that emanated from the igneous rock as it cooled. Limestone adjacent to the intrusion was first altered by hot solutions to a blanket of various calc-silicate minerals, with more distal limestone baked to marble. Subsequently, as the intrusion cooled further, the solutions altered select portion of the earlier calc-silicate mineral assemblages, depositing concentrations of gold and lesser silver in an ‘onion skin’ type arrangement in the domed sequence of altered limestone above the intrusion. Hematite-dusted jasperoid is commonly associated with the precious metal mineralization.
The foregoing discussions are a result of site visits and are not to be construed as a recommendation, an endorsement or as investment advice. Sprott Asset Management USA, entities that it controls, family, friends, employees, associates, and others may hold positions in these securities, may recommend them to clients, and may sell the same at any time.