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Filtering by: Creator Meyer, Bruno Advisor Dilles, John H.

What lies Beneath? Origin and Transition from the Shallow Epithermal Au-Ag Lithocap to Deeper Porphyry Cu Environment: Insights from the Magmatic Hydrothermal Deposits at Yerington, Nevada, and Summitville, Colorado

Creator:

Sepp, Michael D.

Abstract:

Near-surface advanced argillic hydrothermal alteration zones, also referred to as lithocaps, are characterized by quartz, alunite, clays (pyrophyllite and kaolinite group minerals), and minor F-bearing aluminosilicates (i.e., topaz, zunyite, diaspore, and APS) that form where water-, SO2-, and HF-rich gas condenses into shallow groundwater, acidifies, and reacts with rocks. The...

Resource Type:

Dissertation

Full Text:

Lipske, Scott Halley, Chris Hecker, Frank van Ruitenbeek, Bruno Portela, Cari Deyell-Wurst, Erin Looby
Geology of the Cretaceous Lascano-East intrusive complex : magmatic evolution and mineralization potential of the Merin Basin, Uruguay

Creator:

Cernuschi Rodilosso, Federico

Abstract:

The Cretaceous Merín aborted-rift basin of eastern Uruguay is composed of sub-alkaline Paraná-Etendeka province basaltic flows and shallow intrusives (~133 to 131 Ma), rhyolitic ignimbrites (~130 to 128 Ma) and associated mildly alkaline to alkaline intrusions and volcanic rocks (~128 to 127 Ma). Four intrusive complexes from 20 to >30...

Resource Type:

Masters Thesis

Full Text:

to my old friend Bruno Conti for introducing me to Lascano, taking me to the field and telling me