Abstract Alkalic basalts from continental regions have been widely used to fingerprint chemically and lithologically distinct components in the mantle. However, superimposed on mantle source effects are of intra-crustal magma differentiation, which may be underestimated when exclusively considering fractional crystallization (FC) melt-rich chambers. Here we present extensive mineralogical geoch...

Abstract Incineration is one of the key technologies in disposal municipal waste, which produces solid waste incineration (MSWI) residues with high valuable metal contents. The recycling strategy for MSWI typically focused on recovery scrap metals yielding processed (PIR) as main byproduct. However, PIR still contains metals, particularly gold, cannot be extracted by conventional methods. Here,...

Silver nanoparticles were prepared by microwave irradiation of silver nitrate solution with carboxymethyl chitosan as reducing agent and a stabilizer. The optical properties, morphology and structure were characterized using UV–Visible spectrophotometer, transmission electron microscope (TEM) and X-ray diffraction (XRD). Appearance of surface plasmon band at 413 nm indicated the formation of si...

Ol Doinyo Lengai (ODL, Tanzania, East African Rift) is the only known volcano currently erupting carbonatite on Earth with 30 yr. cycles alternating between quiescent effusion and explosive, compositionally-zoned silicate eruptions. We performed isothermal crystallization thermal gradient experiments involving ODL nephelinite, Na 2 CO 3 H O to understand magmatic differentiation in this system ...

Rea, D.K. and Scheidegger, K.F., 1979. Eastern Pacific spreading rate fluctuation and its relation to Pacific area volcanic episodes. J. Volcanol. Geotherm. Res., 5: 135--148. Sea-floor spreading rates from four locations along the Nazca-Pacific plate boundary and one along the Juan de Fuca-Pacific plate boundary show variations over the past 2.4 m.y., with decreasing rates prior to the Jaramil...

Developing durable Si-based photoelectrochemical hydrogen evolution reaction in alkaline media is attracting attention device-level water splitting, but still faces a trade-off between the alkalic corrosion resistance and light transmission for Si photocathodes. Herein, synergetic strategy proposed to employ an anti-reflective Co-P film cocatalyst modulated via self-assembly of protective-layer...