The Average Igneous Rock

A deformed alkaline igneous rock – carbonatite complex from the 3 Western Sierras Pampeanas

Fracture toughness measurements on igneous rocks using a high-pressure, high-temperature rock fracture mechanics cell

A sound knowledge of mechanical properties of rocks at high temperatures and pressures is essential for modelling volcanological problems such as fracture of lava flows and dike emplacement. In particular, fracture toughness is a scale invariant material property of a rock that describes its resistance to tensile failure. A new fracture mechanics apparatus has been constructed enabling fracture...

Magnesium isotopic composition of igneous rock standards measured by MC-ICP-MS

Keyword: Mg isotopes Igneous rock standards MC-ICP-MS To provide inter-lab comparison for high-precision Mg isotope analysis, Mg isotope compositions (expressed as δMg relative to DSM-3) for commercially accessible peridotite, basalt, andesite, and granite geostandards have been measured by multi-collector inductively coupled mass-spectrometry (Nu-Plasma) using sample-standard bracketing method...

Continental igneous rock composition: A major control of past global chemical weathering

The composition of igneous rocks in the continental crust has changed throughout Earth's history. However, the impact of these compositional variations on chemical weathering, and by extension on seawater and atmosphere evolution, is largely unknown. We use the strontium isotope ratio in seawater [(87Sr/86Sr)seawater] as a proxy for chemical weathering, and we test the sensitivity of (87Sr/86Sr...

Microorganisms and Their Influence on Radionuclide Migration in Igneous Rock Environments

A microbe is an organism that has all it needs for a complete life cycle in one single cell. Many microbial species may under appropriate circumstances form multi-cellular structures, sometimes with morphological and metabolic differentiations between the different cells making up a bio-structure. Growth by cell division is the most common way of microbe propagation. The microbes outnumber mult...