Eruption forecasting is a major goal in volcanology. Logically, but unfortunately, forecasting hazards related to non-magmatic unrest is too often overshadowed by eruption forecasting, although many volcanoes often pass through states of non-eruptive and non-magmatic unrest for various and prolonged periods of time. Volcanic hazards related to non-magmatic unrest can be highly violent and/or de...

The iron isotopic fractionation factor between magnetite and fayalite was measured at high temperature in a piston–cylinder apparatus. For the first time, the three-isotope method [Matsuhisa, J., Goldsmith, J. R., and Clayton, R. N., 1978. Mechanisms of hydrothermal crystallisation of quartz at 250 °C and 15 kbar. Geochim. Cosmochim. Acta 42, 173–182.] has been used to determine equilibrium fra...

OPTIMASBA: A Microsoft Excel workbook to optimise the mass-balance modelling applied to magmatic differentiation processes and subsolidus overprints Marı́a Teresa Cabero , Santiago Mecoleta , Francisco Javier López-Moro c,n a Department of Statistics, University of Salamanca, Plaza de Los Caı́dos, s/n. 37008 Salamanca, Spain b Atalaya 3, 31 C, 37193 Salamanca, Spain c Department of Geology, Unive...

Volcanic activity at convergent plate margins is localized along lineaments of active volcanoes that focus rising magma generated within the mantle below. In many arcs worldwide, particularly continental arcs, the volcanic front migrates away from the interface of subduction (the trench) over millions of years, reflecting coevolving surface forcing, tectonics, crustal magma transport, and mantl...

the study area is located about 3 km southwest of the hormoz island in the hormozgan province, in the persian gulf. the main rock units in the region consist of a highly altered acidic pluton cratophyre, which is responsible for apatite formation, diabasic dike, marl and altered basalt. apatite is the only phosphate mineral in the hormoz island, which has accumulated ree in its crystal structur...

Abstract Alkaline magmatic systems formed in intraplate settings have a low Au endowment, contrasting with the high fertility of alkaline arc and rift settings, which host numerous Au-rich porphyries Cu-Au Au-Ag epithermal deposits. Among other factors, system is determined by concentration ore-forming magma, strongly controlled amount chemistry sulfides that fractionated during magma different...