Calendar Events

Date / PlaceTimeEvent Title
Wed Sep 24, 2014
Place: Tory 3-36
12:00
El Soldado is a giant (476 Mt @ 1.1 % Cu, Ag) copper deposit in the Chilean Andes. However, it is not a porphyry copper, but a strata-bound “manto” deposit hosted by Cretaceous marine sedimentary and volcanic rocks. Its genesis has been considered syngenetic, or epigenetic , related to alkaline magmatism or to batholith intrusion; it has even been grouped with IOCG deposits. However, our comprehensive research suggests that the deposit developed by replacement of diagenetic pyrite which formed by bio-degradation of liquid petroleum within a fault controlled reservoir. Hot, chloride- and copper-rich, basinal fluids replaced pyrite and bitumen ca. 20 my later than regional folding and burial metamorphism, and (geochronology indicates) before the intrusion of the Cretaceous batholith.
Fri Sep 26, 2014
Place: Tory 3-36
12:00
The rovers Spirit and Opportunity touched down on Mars in January 2004 and have been conducting extensive observations with the Athena science payload. Together the two rovers have traversed more than 45 km. Spirit, located on the floor of Gusev crater, investigated basaltic plains, as well as older materials in the Columbia Hills. The rocks of the Columbia Hills are granular in nature and have undergone significant alteration by water. They appear to be largely a mixture of altered impact ejecta and explosive volcanic materials. Spirit has discovered silica-rich deposits that may have formed in a hot spring or volcanic fumarole environment, as well as massive carbonate-rich rocks. Opportunity has carried out the first outcrop-scale investigation of ancient sedimentary rocks on Mars. The rocks are sandstones formed by wind and water erosion and re-deposition of “dirty evaporite” materials rich in sulfate salts. While liquid water was present below and occasionally at the surface, the ancient environmental conditions recorded are dominantly arid, acidic and oxidizing, and would have posed significant challenges to life. In the past three years, Opportunity has investigated the rim of Endeavour Crater. Basaltic breccias produced by the impact form the rim deposits, with stratigraphy similar to that observed at similar-sized craters on Earth. Highly localized Zn enrichments suggest hydrothermal alteration of rim deposits. Gypsum-rich veins precipitated from low-temperature aqueous fluids cut sedimentary rocks adjacent to the crater rim. The most ancient rocks of the crater rim have undergone substantial alteration by circum-neutral pH fluids, creating localized zones along fractures that are rich in Al-phyllosilicates. The environment these materials represent would have been more favorable for life than seen elsewhere at Meridiani.
Fri Oct 03, 2014
Place: Tory 3-36
12:00
Fri Oct 10, 2014
Place: Tory 3-36
12:00
Fri Oct 17, 2014
Place: Tory 3-36
12:00
Fri Oct 24, 2014
Place: Tory 3-36
12:00
Fri Oct 31, 2014
Place: Tory 3-36
12:00
Mon Nov 03, 2014
Place: Tory 3-36
12:00
Fri Nov 07, 2014
Place: Tory 3-36
12:00
Fri Nov 14, 2014
Place: Tory 3-36
12:00