Studying the quantity and origin of CO2 emitted by back-arc mud volcanoes is critical to correctly model fluid-dynamical, thermodynamical, and geochemical processes that drive their activity and to constrain their role in the global geochemical carbon cycle. We measured CO2 fluxes of the Bledug Kuwu mud volcano on the Kendeng Fold and thrust belt in the back arc of Central Java, Indonesia, usin...

The Upper Jurassic Mantos Blancos copper deposit (500 Mt at 1.0% Cu), located in the Coastal Range of northern Chile, displays two superimposed hydrothermal events. An older phyllic alteration probably related to felsic magmatic–hydrothermal brecciation at ∼155 Ma, and younger (141–142 Ma) potassic, propylitic, and sodic alterations, coeval with dioritic and granodioritic stocks and sills, and ...

The McMurdo Dry Valleys magmatic system, Antarctica, provides a world-class example of pervasive lateral magma flow on a continental scale. The lowermost intrusion (Basement Sill) offers detailed sections through the now frozen particle microstructure of a congested magma slurry. We simulated the flow regime in two and three dimensions using numerical models built on a finite-element mesh deriv...

The Precambrian rocks in western Ethiopia consist of highand low-grade terranes intruded by granitoids with a wide compositional spectrum. The formation ages of these granitoid rocks are, so far, poorly understood. Single-grain zircon Pb/Pb evaporation and conventional U/Pb dating conducted on four granitoids places time constraints on their emplacement and tectonothermal events. Three granitoi...

Analysis of internal structures of the Brooks Range ophiolite at the three largest and well-exposed klippen reveals a NE-SW structural grain that may parallel the original axis of magmatism of a slow spreading marginal ocean basin. Sub-parallel directions of lattice·fabrics in olivine of mantle peridotite and shape fabrics in pyroxene and plagioclase of layered gabbro indicate that asthenospher...

A Comparison of Theoretical Inferences for Magmatic Supply on Mars S. Baloga Relative Ages of Martian Volcanoes N. G. Barlow Martian Mantle Primary Melts C M. Bertka, Z R. Holloway, and V. Pan Magmatic Sulfides on Mars R. G. Bums Constraints on Eruption Rates and Cooling of Three Lava Flows at Alba Z Crisp Hadriaca Patera: Evidence for Pyroclastic Volcanism in the Hellas Region of Mars D.A. Cro...

Title of Document: The Multiple Sulfur Isotopic Composition of Iron Meteorites: Implications for Nebular Evolution. Michael Ariel Antonelli, Master of Science, 2013. Directed By: Professor James Farquhar, Department of Geology and Earth System Sciences Interdisciplinary Center, University of MarylandCollege Park Multiple sulfur isotopic measurements of troilite from 61 different iron meteorites...