Introduction: Howardite-eucrite-diogenite (HED) meteorites belong to the largest group of achondrites and originate from protoplanet 4 Vesta. The surface of Vesta has been extensively affected by impacts which brecciated and mixed eucrite and diogenite material to produce a regolith and formed large basins in the south pole region [1]. Shock features preserved in meteorites due to high-velocity...

We use the results of elevated pressure melting experiments to constrain the role of melt/mantle reaction in the formation of tholeiitic magma from Kilauea volcano, Hawaii. Trace element abundance data is commonly interpreted as evidence that Kilauea tholeiite is produced by partial melting of garnet lherzolite. We experimentally determine the liquidus relations of a tightly constrained estimat...

Three new types of fluxgate magnetometers are presented in this paper, able to monitor the three components of the ambient field, all of them based on the principle of rotational excitation field. The first type is based on YttriumIron Garnet (YIG) single crystal film, magnetized with rotational field on its plane, where the 2 nd , 4 th and 6 th harmonics offer the three components of the ambie...

The elasticity of high-pressure mantle phases may be characterized by crystal chemically similar compounds. Analogue compounds available as single crystals yield the most reliable elastic constant data. The single-crystal elastic constants of pleonaste and hercynite spinel, rutile-structure germanium dioxide, and spessartite-almandine garnet are studied, in most cases as a function of pressure ...

Complexes of the oxa-thia macrocycles [18]aneO4S2, [15]aneO3S2 and the oxa-selena macrocycle [18]aneO4Se2 (L) of types [MCl2(L)]FeCl4 (M = Sc or Y) were prepared from [ScCl3(thf)3] or [YCl2(THF)5][YCl4(THF)2] and the ligand in anhydrous MeCN, using FeCl3 as a chloride abstractor. The [MI2(L)]I, [LaI3(L)] and [LuI2(L)]I have been prepared from the ligands and the appropriate anhydrous metal trii...

Mineral Compositions in Xenoliths from Malaita The report by Collerson et al. (1) of transition zone and lower mantle phases in mantle-derived material from alnöite pipes on Malaita, Solomon Islands, is highly significant in view of the rarity of such natural assemblages. Malaita is part of the obducted southern margin of the Ontong Java Plateau, an area of overthickened oceanic crust (2–7) tha...

Mobile computers and personal digital assistants are now widely affordable and are powerful enough to run paradigm shifting mobile applications and support programming environments like Java. We are investigating the support services and software infrastructure that is needed for the next generation of mobile users and applications that will use such devices. As well as email, messaging and web...

The elastic properties of candidate mantle phases are used to test the viability of olivine-rich (pyrolitic) and CaO + Al,O,-rich (eclogitic) assemblages for the mantle. High temperature adiabats for each phase of interest are constructed and compared to mantle seismic pro. perties. Both pyrolitic and eclogitic assemblages satisfy the seismic properties between 200 and 400 km. Between 400 and 6...

Venous malformations are slow-flow vascular malformations present at birth, although they occasionally do not become clinically evident until several years later. They manifest clinically as soft, nonpulsatile masses of blue or violaceous color that compress easily on palpation. Their presence within the mouth is not uncommon and can be associated with bleeding, ulceration, pain, difficulty swa...

Early Cretaceous alkaline picrites and high-magnesium basalts from the North China craton provide evidence for recycling of continental lithosphere by density foundering. Both the picrites and basalts contain xenocrystic olivines with high Fo92-93 and low CaO (<0.10%), consistent with the lavas’ derivation from, or interaction with Archean mantle lithosphere. Most importantly, both the picritic...