Semi-automatic chemical separation system for Sr and Nd isotope analyses

rb-sr and nd-sr isotope geochemistry and petrogenesis of the misho mountains mafic dikes (nw iran)

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...

Isotope Effects, Isotope Separation and Isotope Fractionation

THE AGE OF TISSINT: Sm-Nd & Rb-Sr ISOTOPE SYSTEMATICS OF A MARTIAN METEORITE FALL

Introduction: The recently acquired meteorite Tissint is the first recognized fall of a depleted shergottite. Other such shergottites were found in the hot deserts (e.g., NWA 1195, Dhofar 019, DAG 476) or in the Antarctic cold desert (e.g., QUE 94201, Y980459) and, in many cases, have disturbed isotopic systematics due to terrestrial contamination [1-4]. Tissint represents the freshest sample o...

Potential uses of stable isotope ratios of Sr, Nd, and Pb in geological materials for environmental studies

The ratios of stable isotopes of certain elements in rocks and minerals have strong regional characteristics that are reflected in atmospheric components, in water, and in the living organisms that form Earth's surface environment as well as in agricultural and fishery products. Geologically derived stable isotope ratios can be used as a tracer for the source of many kinds of substances, with c...

An automatic system for kinetic clinical analyses

deleted, the remainder packed down, and new data entered at 4 sec intervals. This process of checking the AA between 'Time Zero' and the tenth data point, and then doubling the time base, can provide reading intervals of 2, 4, 8, 16, 32 and 64 sec on any cuvette. Calculation of the AA value and checking that it exceeds the predetermined minimum occurs when a signal is being acquired on the foll...