The spherical particles of iron were generated by iron fusion processes at high temperature (anthropic sources); while other kinds of iron metal particles can be linked: to a crustal origin, those enriched by typical terrigenous elements as Si, Al, K, and to an anthropogenic origin, as abrasion of metallic materials or in general to traffic related sources.
The data suggest that the dominant sources of lithium to the lakes are the dissolution of aeolian dust of crustal origin on the glacial surface, marine aerosols, dissolution of salts and chemical weathering in the stream channels, and ancient seawater.
The potency for inducing the release of proinflammatory mediators may be related in part to the content of PM elements of crustal origin, but the mechanisms for the variable potency for stimulating ROS production remain unclear and likely involve factors in addition to elemental constituents.
Instead, the data lie on a line that extends from a point consistent with a hybrid of atmospheric xenon and xenon of crustal origin.
Constituents derived from combustion of fossil fuel (including diesel), as well as those of crustal origin, were associated with some of the greatest risks.
High pressure rocks, including carpholite-bearing meta-sediments, garnet-blue-schists and eclogites of continental crustal origin are exposed in north-eastern Oman, structurally beneath the ophiolite (Lippard 1983).
It is shown that expansion of the ionospheric plasma along the magnetic field lines of crustal origin can produce bulges in the plasma density.
It also has been suggested that particles of crustal origin are associated with markers of inflammation and acute toxicity in bioassays (Steerenberg et al. 2006).
The constituents that appear to generate most of the risk are derived from combustion of fossil fuel (including diesel) and biomass, as well as from PM of crustal origin.
Magnetometer measurements on the Pioneer Venus Orbiter (PVO) have shown that Venus is a non-magnetic planet and similar measurements on the Mars Global Surveyor (MGS) have demonstrated that, except for some very localized magnetic fields of crustal origin, Mars intrinsic magnetic field is rather weak.
