introduction there are some theories about the paleotethys event during the paleozoic that have been proposed by geologists (metcalfe, 2006). some scientist offered some pieces of evidence about the northern margin of gondwana (zhu et al., 2010). the paleotethys ocean and hercynian orogenic report first in iran, have been offered from the morrow and misho mountain (eftekharnejad, 1981). misho m...

West Junggar is a key area for understanding intra-oceanic plate subduction and the final closure of Ocean. Knowledge Carboniferous tectonic evolution Ocean region required framework accretionary processes in Junggar, Central Asian Orogenic Belt. A series Early volcanic intrusive rocks, namely, basaltic andesite, dacite, diorite, occur Mayile southern northwestern China. Our new LA-ICPMS zircon...

Bioavailable Sr and detrital Nd isotopes are important tools for archaeological provenance. To apply provenance, regional isotope databases baselines generally needed. For the vast Silk Road regions of Mesopotamia, Iran, Central Asia, detailed isotopic distribution patterns essential determining provenance may not become available in short term due to severe deficiency data. In present work, we...

Stable Strontium. Elemental strontium (atomic number 38) occurs naturally in the earth's mantle as a mixture of four stable isotopes, Sr, Sr, Sr, and Sr, and is present everywhere in very dilute concentrations. It is very similar to calcium in its environmental and physiological behavior. Strontium is generally found in molecular compounds with other elements. Commercially important strontium m...

Neodymium (Nd) isotopes are considered a valuable tracer of modern and past ocean circulation. However, the promise of Nd isotope as a water mass tracer is hindered because there is not an entirely self-consistent model of the marine geochemical cycle of rare earth elements (REEs, of which Nd is one). That is, the prevailing mechanisms to describe the distributions of elemental and isotopic Nd ...

Compiled data show the age progression of magmatic centers along two approximately linear profiles from NE Greece and NW Turkey to South Aegean Volcanic Arc. The reveals southwestward migration arc activity Oligocene present, perpendicular Hellenic Trench. This is in accordance with subduction zone due collision oceanic continental blocks, trench retreat, mantle flow, coeval extension. We sugge...