The spreading of the East Vietnam Sea (EVS, also known as Bien Dong, or South China Sea), leading to occurrence syn-spreading (33-16 Ma) and post-spreading (< 16 present) volcanism. Syn-spreading magma making up thick layers tholeiitic basalt with a geochemical composition close refractory depleted mid-ocean ridge (MORB) is mainly distributed inside EVS basin. widely basin extended SE China,...

Oxyhydroxides like δ-(Al,Fe)OOH may stabilize “water” in Mid-Ocean Ridge Basalt (MORB) subducted into the Earth's lower mantle. The single-crystal elasticity of has not been experimentally constrained, hampering an accurate evaluation seismic detectability this high-pressure solid solution, and presence “water,” deep Earth. Here, we report first experimental results δ-(Al0.97Fe0.03)OOH measured...

Introduction: At least three major geochemical reservoirs have been identified in the crust-mantle system of Mars, including the primitive mantle, an ancient highly depleted mantle, best sampled by the most LREE-depleted basaltic shergottites, and an ancient enriched crust [e.g., Refs. 1-4]. Some workers, evaluating both isotopic and geochemical data, have suggested additional reservoirs, for e...

This study presents Ba isotope compositions of ocean island basalts (OIB) from the Azores Archipelago to investigate origin enriched components within their mantle sources. These samples have large variations in radiogenic Sr-Nd-Pb-Hf compositions, indicating that they tap highly heterogeneous They display two types characteristics. Samples Faial, Pico, São Jorge, and Miguel Islands exhibit hom...

1. Sichel LS, Greenko J, Heffernan R, Weiss D. Field investigations of emergency department syndromic surveillance signals, New York City. Presentation at the 2003 National Syndromic Surveillance Conference [cited 2004 Jan]. Available from: http://www.syndromic.org/pdf/con2LS-8b.pdf 2. Sosin DM. Syndromic surveillance: the case for skillful investment. Biosecur Bioterror. 2003;1:247–53. 3. Cent...

Clinopyroxene megacrysts occurring in Cenozoic mafic alkaline volcanic rocks from the northern margin of Bohemian Massif (SW Poland, SE Germany) could be subdivided by colour and Mg# (Mg/(Mg + Fe tot )) three groups. Megacryst with highest = 90.0–91.5 (“high Mg#”, HMg#) is transparent strongly Light Rare Earth Element (LREE) depleted contains abundant orthopyroxene lamellae. The clinopyroxene “...

The Kermanshah ophiolite complex is a part of the Mediterranean–Zagros–Oman Tethyan ophiolites, located in the structural–tectonic zone of western Iran in the northern part of the Zagros main thrust. Doleritic sheeted dykes are well exposed within the ophiolite in the south of Sahneh. These dykes contain high MgO, Na2O, low TiO2 (2O5, and K2O contents, and high FeOt/MgO and LILE/HFSE ratios. Th...

Understanding the subduction and recycling of continental crust is crucial for reconstructing long-term evolutionary history Earth's mantle crust. The Himalaya-Tibet orogen arguably world's best natural laboratory investigating these processes. Cenozoic post-collisional ultrapotassic volcanic rocks are common in Lhasa block southern Tibet they can provide important clues to crust-mantle interac...

the upper cretaceous ganj complex, a part of the jazmurian ophiolitic belt, is located on the western boundary of jazmurian depression and separated from kahnuj ophiolitic complex by north-south trending jiroft fault. the complex consists of lava flows, pillow lavas, acidic plutonic and sedimentary rocks which are intruded by northwest-southeast trending dykes. it does not resemble a classical ...