In this study, daily fine particulate matters (PM2.5) were sampled between 22 February 2011 and 2012 in Bolu Abant ?zzet Baysal University Campus. 277 PM2.5 samples collected by using a stacked filter unit. Fifty-one elements (Li, Be, Na, K, Mg, Al, P, S, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ge, As, Se, Rb, Sr, Y, Mo, Cd, Sn, Sb, Cs, La, Ce, Pr, Nd, Eu, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf,...

Sm-Nd isochrone, drawn for rock-forming and sulfide minerals from the Ozernoe ore occurrence, indicates albitite age of 1,759 ± 11 Ma. It shows synchronous formation mineralization, fully corresponds to earlier defined rutile in (1,757 7 Ma U-Pb, n = 3, MSWD 0.2), Rb-Sr isochrone 1,754 39 biotite, apatite, albite, WR. Recently published Re-Os ages molybdenite 1,872 23 chalcopyrite 1,891 230 ind...

Investigations have been undertaken to provide constraints on the nature of geochemically active processes in the mantle and their effects on mantle evolution and magma generation. Three types of approaches have been implemented: (1) To study isotopic systematics and trace element abundances in young, mantle-derived volcanic rocks, which, because of their tectonic setting, had little or no chan...

a r t i c l e i n f o Keywords: 146 Sm– 142 Nd systematics eucrites early planetary differentiation isotope distribution through solar system Short-lived 146 Sm– 142 Nd and long-lived 147 Sm– 143 Nd chronometers have been measured in three cumulate eucrites (Binda, Moore County and Moama). The two major mineral phases (plagioclase and pyroxene) present in these achondrites are characterized by ...

Mississippi Valley-type (MVT) ore deposits arc epigenetic carbonate-hosted Pb-Zn deposits that contain galena, sphalerite, fluorite, bar&e, dolomite, calcite, and quartz. Although they are thought to form from basinal brines, their exact origins are still unclear, partly because of the scarcity of reliable geochronological data. Rb-Sr dating of sphalerites has recently been shown to be a promis...