Mathematics – Logic
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49..503s&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 49, Feb. 1985, p. 503-518.
Mathematics
Logic
24
Carbonates, Geochronology, Marine Chemistry, Neodymium Isotopes, Phosphates, Samarium Isotopes, Atom Concentration, Sea Water, Strontium Isotopes
Scientific paper
The possibility of establishing a record of variations in the isotopic composition of Nd in seawater over geologic time is explored. To construct such a record, a phase must be identified which incorporated Nd with the same isotopic composition as seawater at the time of its formation, preserves that composition, and which is relatively common in sediments. To evaluate the suitability of carbonates and phosphates, the Rb, Sr, Sm, and Nd concentrations and the Nd and Sr isotopic composition of a variety of modern and ancient marine calcite, aragonite, and apatite samples have been measured and the results are presented and discussed.
Shaw Henry F.
Wasserburg Gerald J.
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