We present new Sr-Nd-Hf isotopic data on mid-ocean ridge basalts from two segments (OH-1, OH-3) between the Oceanographer and Hayes fracture zones at Mid-Atlantic Ridge 33–35°N to constrain nature origin of upper mantle heterogeneity beneath Ridge. Together with major trace elements (Niu et al., 2001), illustrate that sources these lavas comprise three components, i.e., a depleted high radiogen...

Trieloff et al. (1) provided neon isotope data to argue that mantle neon originates as a trapped component in meteorites rather than having a pristine solar composition. That finding, if true, has important consequences for understanding the mechanism of volatile input into the mantle, because it rules out models involving direct incorporation of solar gases. The main argument that Trieloff et ...

‎darafsheh and assari in [normal edge-transitive cayley graphs on non-abelian groups of order 4p‎, ‎where $p$ is a prime number‎, ‎sci‎. ‎china math‎., ‎56 (1) (2013) 213-219.] classified the connected normal edge transitive and‎ ‎$frac{1}{2}-$arc-transitive cayley graph of groups of order $4p$‎. ‎in this paper we continue this work by classifying the‎ ‎connected cayley graph of groups of order...

Abstract Basalts and basaltic rocks are the most abundant igneous on earth their petrologic geochemical studies have formed our knowledge base thermal structure composition of mantle with which we developed workable models chemical differentiation earth. All this would not been possible without innovative painstaking experimental petrology peridotite melting, magma generation evolution largely ...

background: due to difficulty of obtaining a 24h urine (especially in children), a random urine calcium sample is recommended to detect of hypercalciuria. however, recent studies have shown that the urinary calcium/creatinine ratio varies with age and geographic areas. so, the aim of this study was determining the normal value of urinary calcium to creatinine ratio in healthy adolescent’s child...