Understanding magma transport in sheet intrusions is crucial to interpreting volcanic unrest. Studies of dyke emplacement and geometry focus predominantly on low-viscosity, mafic dykes. Here, we present an in-depth study two high-viscosity dykes (106 Pa·s) the Chachahuén volcano, Argentina, Great Dyke Sosa Dyke. To quantify geometries, flow indicators, viscosity, combine photogrammetry, microst...

Beneath the fusion-encrusted surfaces of the most primitive stony meteorites lies not homogeneous rock, but a profusion of millimeter-sized igneous spheres. These chondrules, and their centimeter-sized counterparts, the calcium-aluminum-rich inclusions, comprise more than half of the volume fraction of chondritic meteorites. They are the oldest creations of the solar system. Their chemical comp...

s CD. BODINIER, J.-L., MENZIES, M. A., SHIMIZU, N., FREY, F. A. & MCPHERSON, E. 2004. Silicate, hydrous and carbonate metasomatism at Lherz, France: contemporaneous derivatives of silicate melt–harzburgite reaction. Journal of Petrology, 45, 299–320. BONADIMAN, C., BECCALUVA, L., COLTORTI, M. & SIENA, F. 2005. Kimberlite-like Metasomatism and ‘garnet signature’ in spinel-peridotite xenoliths fr...

Martian meteorite ALH84001 (ALH) is the oldest known igneous rock from Mars and has been used to constrain its early history. Lutetium-hafnium (Lu-Hf) isotope data for ALH indicate an igneous age of 4.091 +/- 0.030 billion years, nearly coeval with an interval of heavy bombardment and cessation of the martian core dynamo and magnetic field. The calculated Lu/Hf and Sm/Nd (samarium/neodymium) ra...

The basic aspects of redox geochemistry are reviewed to provide a useful compendium the connection between aqueous-hydrothermal and igneous realms Earth. description system is intimately coupled knowledge acid-base properties solvent in which exchanges take place. For magmas, then silicate melts, approaches reporting state were so far cantered around sole concept oxygen fugacity, f O 2 . Master...

Prediction of stable mineral equilibria in the Earth's lithosphere is critical to unravel tectonomagmatic history exposed geological sections. While recent advances geodynamic modeling allow us explore dynamics magmatic transfer solid mediums, there date no available thermodynamic package that can easily be linked and efficiently accounted for computation phase equilibrium systems. Moreover, no...