The Isotopic Composition of Magnesium in Terrestrial Samples

Isotopic Analyses of Barium in Meteorites and in Terrestrial Samples

Isotopic compos•tien and concentration of barium in six stone meteorites and the silicate inclusions of two iron meteorites and three terrestrial samples were measured by use of a 'double spike' isotopic dilution technique in order to correct for laboratory fractionation. Any differences between the abundances of the isotopes in meteoritic and terrestrial Ba were found to be less than 0.1% for ...

The Absolute Isotopic Composition and Atomic Weight of Terrestrial Nickel

Twenty-nine samples of high-purity nickel metals, reagent salts and minerals, collected from worldwide sources, have been examined by high-precision isotope ratio mass spectrometry for their nickel isotopic composition. These materials were compared directly with SRM 986, certified isotopie standard for nickel, using identical measurement techniques and the same instrumentation. This survey sho...

Magnesium isotopic composition of the Earth and chondrites

To constrain further the Mg isotopic composition of the Earth and chondrites, and investigate the behavior of Mg isotopes during planetary formation and magmatic processes, we report high-precision (±0.06& on dMg and ±0.07& on dMg, 2SD) analyses of Mg isotopes for (1) 47 mid-ocean ridge basalts covering global major ridge segments and spanning a broad range in latitudes, geochemical and radioge...

Fe isotopic composition of Martian meteorites and some terrestrial analogues

Fe Isotopic Composition of Martian Meteorites & Some Terrestrial Analogues

M. Anand ([email protected]), S.S. Russell, R. Blackhurst, M.M. Grady Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK Department of Mineralogy, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK Department of Earth Science and Engineering, Imperial College, London, SW7 2AZ, UK Planetary Science & Space Research Institute, The Open Universi...