The investigation of heterogeneous magma systems enhances the understanding differentiation and transfer processes in active volcanoes, thus constraining dynamics driving eruptions related hazard. Magma heterogeneity is generally preserved coeval juvenile products explosive eruptions, as it occurs Upper Pumice sequence, emplaced by last sub-Plinian eruption at Nisyros volcano (Greece). deposit ...

Stable Pb isotopes, Pb elemental concentrations, and, for some samples, Nd and Sr isotopes and concentrations have been analyzed on soils and on stream and estuarine sediments to evaluate the provenance of major inputs of Pb to the O'ahu, Hawai'i, environment. Core samples from the Ala Wai Canal, a major estuary draining urban Honolulu, preserve a historical record of anthropogenic lead input t...

The South Armenian Block (SAB) belongs to the Lesser Caucasus, and it is located where Central Tethyan belt bends from an EW orientation in Turkey NW-oriented Iranian tectonic zones. Magmatism these belts result of convergence, collision post-collision evolution Arabian plate with Eurasian margin. An exhaustive study including whole-rock major, trace element, radiogenic isotope (Sr, Nd, Pb) dat...

The isotope ratios of Sr are useful tracers for studying parent material sources, weathering processes, and biogeochemical cycling. Mineralogical and geochemical investigations of two lateritic weathering covers, in an area close to the Tropic of Cancer (Guangxi Province, southern China), were undertaken to study the regional weathering processes and Sr isotopic sources. We found that weatherin...

Introduction: The nakhlites/chassignites and the shergottites represent two differing suites of basaltic martian meteorites. The shergottites have ages ≤ 0.6 Ga and a large range of initial Sr/Sr and e(Nd) ratios. Conversely, the nakhlites and chassignites cluster at 1.3-1.4 Ga and have a limited range of initial Sr/Sr and e(Nd) [1]. More importantly, the shergottites have e(W) < 1, whereas the...

The neodymium (Nd) isotopic composition of seawater has been used extensively to reconstruct ocean circulation on a variety of time scales. However, dissolved neodymium concentrations and isotopes do not always behave conservatively, and quantitative deconvolution of this non-conservative component can be used to detect trace metal inputs and isotopic exchange at ocean-sediment interfaces. In o...

s and/or oral presentations presented at American College of Rheumatology (ACR) 2010, 2011 and 2012: 1. Pickens SR, Volin MV, Mandelin II AM, Shahrara S. Local expression of IL-27 ameliorate collagen induced arthritis. Arthritis Rheum 714: S298, 2010. Oral presentation 2. Pickens SR, Volin MV, Pope RM, Mandelin II AM, Shahrara S. Characterization of CCR7 and its ligands CCL19 and CCL21 in rheum...