The oldest sediment most recently recovered from the Arctic Ocean is a biosiliceous ooze nearly devoid of nonbiogenic particles and exhibiting small-scale color changes. Color variations are due to changes in iron and manganese content. These elements are probably of local hydrothermal origin, and the Mn precipitation may be bacteria-mediated. An iron silicate phase seems to form at the expense...

The Mt Weld lanthanide deposit in central Western Australia is considered to be one of the largest high grade deposits known in the world, first reported as a carbonate and phosphate rich ultramafic silicate intrusion that contained a resource of the Lanthanide series [1]. It has been dated between 1.6 – 2.0 billion years, where the formation of a carbonate layer in the cooling melt created a p...

The focus of the article is on characterization low-grade Chilisai phosphorites through a comprehensive analysis their physicochemical properties. structure this deposit was studied using modern instrumental methods, including chemical and energy-dispersive analysis, IR-Fourier spectroscopy, X-ray diffraction mineralogical analysis. According to results material composition nodular determined, ...

A new technique was accepted to fill the porosity of Al coating applied by arc thermal spray process to enhance corrosion resistance performance in artificial ocean water. The porosity is the inherent property of arc thermal spray coating process. In this study, applied coating was treated with different concentrations of ammonium phosphate mono basic (NH4H2PO4: AP) solution thereafter dried at...

The chemistry of tributyl phosphate on Fe3O4 was studied in ultrahigh vacuum using temperature-programmed desorption (TPD) and Auger spectroscopy. A portion of the tributyl phosphate desorbs intact with an activation energy of 120 kJ/mol. The remainder decomposes either by PAO bond scission to deposit surface butoxy species or appears to dehydrogenate desorbing C2 or C3 compounds and depositing...

Informal lending and savings institutions exist around the world, and often include regular door-to-door deposit collection of cash. Some banks have adopted similar services in order to expand access to banking services in areas that lack physical branches. Using a randomized control trial, we investigate determinants of participation in a deposit collection service and evaluate the impact of o...

Apatite-bearing ore occurrence Muostalaah and phosphate deposit Birikeen are magnesiocarbonatite complexes of the Seligdar type, located within Nimnyrskaya submeridional metallogenic domain in Aldan-Stanovoy shield South Yakutia, Russia. This study presents geochemical characteristics carbonatites adjacent apatite-bearing silicate rocks apatite occurrence. Comparison these with other world was ...

we have studied the relation between bank deposit rates and house prices in iran. for that, we have run some var models, using the following variables: real deposit rates (including 1 and 5 years deposit rates), money supply (including the high powered money and the liquidity), gdp, housing services index, and number of licenses for new houses. our results show that a reduction in the deposit r...