Magmas vary in composition dependent on a number of factors, in particular their plate tectonic affinity (Perfit and Davidson, 2000 ). Basaltic magmas are common along ocean ridges, hot spots, and continental plateaus. Magmas with higher silica contents (Andesite, Dacite, and Rhyolite) are common...
While they all have a number of things in common (for example, they’re hot!), not all magmas are the same, and there are different classifications used by geologists and other scientists to classify them. The different types of magma are generally determined by the chemical composition, whic...
The architecture of magma plumbing systems plays a fundamental role in volcano eruption and evolution. However, the precise configuration of crustal magma reservoirs and conduits responsible for supplying eruptions are difficult to explore across most ac
by the manner in which lava is erupted; a lava fountain has a high colour temperature (which is itself an approximation of a complex surface temperature–area distribution), whereas a lava flow of the same composition lava with a well-developed surface crust has a much lower colour temperature...
2–32 andcEe5/1–56 units has closely comparable compositional maxima and compositional range, whereas plagioclase in thebEe5/1–50 pumice have considerably more evolved composition. Arrows show the core-rim directions in the plagioclase crystals in pumices from the Ee5/1–56 and Ee5/2–32 ...
Juvenile pyroclastic composition is used to constrain the possible parental magma, its liquid line of descent and chemical zoning in the magma chamber. Magma evolution software was used to verify the hypotheses created using the field and petrological data. With regards to the nomenclature of the ...
Sampling of Surtsey eruption products was systematic, but geochemical analyses have appeared spo- radically in the literature (Fig. 2). The first report of whole-rock composition was for a single tephra erupted on Dec 1, 19645,24. The addition of two additional analyses by Steinþór...
In Harker plots for trace elements, the trends towards biotite and garnet were determined using the average composition of these phases for the element of interest. The fields for the modelled composition of EL and PL corresponds to 95% of the data obtained by stochastic calculations (point ...
evolution of the residual melts of the crystallizing lunar magma ocean and we propose a new trace element composition for the urKREEP reservoir. The new data will be useful for future thermo-chemical models in order to adequately predict the duration of the lunar magma ocean and the age of ...
The melt had a SiO 2 -poor and MgO-rich composition, which is completely different than that of dry peridotite melting experiments. Compared with the seismological lower mantle, the experimental melt is gravitationally lighter; thus, a similar melt could be observed as seismological low-velocity ...