Magmas erupted at mid-ocean ridges (MORB) result from decompression melting of upwelling mantle. However, the mechanism of melt transport from the source region to the surface is poorly understood. It is debated whether melt is transported through melt-filled conduits or cracks on short time scales ( 10 yrs), or whether there is a significant component of slow, equilibrium porous flow on much l...

1. Maeda A, Bateman BT, Clancy CR, Creanga AA, Leffert LR: Opioid abuse and dependence during pregnancy: Temporal trends and obstetrical outcomes. Anesthesiology 2014; 121:1158–65 2. Centers for Disease Control and Prevention (CDC): Vital signs: Overdoses of prescription opioid pain relievers and other drugs among women—United States, 1999–2010. MMWR Morb Mortal Wkly Rep 2013; 62:537–42 3. Cent...

The Zhob ophiolite is divided into Ali Khanzai, Omzha, and Naweoba blocks. geology comprises various lithological units including basalt–chert hyaloclastite mudstone units. consist of thick lava pelagic sediments. On the basis petrology geochemistry, lavas unit can be tholeiitic basalt, trachybasalt, basaltic andesite dacite, that more alkaline foidite, picrobasalt, tephrite-basanite. rocks hav...

Boninites are unusual island arc volcanic rocks with high MgO (>9%), high Si0 2 (>55%) contents, and exceptionally low TiO 2 (<0.4%) contents. High MgO contents, MgO/(MgO + EFeO), Ni, Cr and Co contents indicate that boninites have equilibrated with mantle peridotite. Experimental petrologic studies and high Cr/(Cr + Al) in spinels in boninites suggest that they have separated from extremely re...

Abstract Mantle-derived volcanic rocks from the Subbetic hyperextended basin in SE Spain provide new insights into composition and mechanical behavior of mantle during continental rifting. The present study describes a sequential restored cross-section along with geochemical characteristics basaltic interbedded within Mesozoic succession basin. Sedimentary stacking patterns minibasins above mob...

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I apply array processing techniques to study the slowness and coda of P/Pdiff for 1,371 shallow earthquakes (< 200 km) that occurred in Asia, South America, Tonga-Fiji, and Indonesia, and were recorded by the medium-aperture array, YKA, in Canada. The slowness analysis shows lateral variations in Earth structure at the base of the mantle across the north Pacific. I observe an Ultra-Low Velocity...