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Strontium isotope analysis
ALS Scandinavia offers lead isotope ratio of 87 Sr and 86 Sr Analysis of strontium isotope ratios is useful in a variety of fields including: Provenance studies; Geology; Geochronology; Forensics; The analysis of strontium (Sr) isotopes can be carried out by two techniques, ICP-SFMS (high resolution ICP-MS) and MC-ICP-SFMS (multicollector ICP-SFMS)...
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Stable Isotope Analysis in Archaeology
Various stable isotope ratios in combination, sometimes including the isotopes of heavy elements like strontium and lead, have been used to determine whether the residents of ancient cities were immigrants or were born locally; to trace the origins of poached ivory and rhino horn to break up smuggling rings; and to determine the agricultural ....
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Strontium (Sr)
The radioactive isotope Strontium-90, with a half-life of 29 years, is a product of nuclear fission and a high-energy beta emitter , The ratio of carbon isotopes in three common species of tuna has changed substantially since 2000, suggesting major shifts are taking place in phytoplankton populations that form the base of the ocean's food ....
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Isotopes of strontium
52 rows· The alkaline earth metal strontium (38 Sr) has four stable, naturally occurring isotopes: 84 Sr (056%), 86 Sr (986%), 87 Sr (70%) and 88 Sr (8258%) Its standard atomic weight is 8762(1) Only 87 Sr is radiogenic; it is produced by decay from the radioactive alkali metal 87 Rb, which has a half-life of 488 × 10 10 years (ie more than three times longer than the current age of the ....
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SAGE Reference
Talbot, M & Alves, T (2014) Strontium (sr) isotope ratio In J Matthews (Ed), Encyclopedia of environmental change (pp 1056-1057) Thousand Oaks,, CA: SAGE ....
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Isotopes of strontium
The ratio 87 Sr/ 86 Sr is the parameter typically reported in geologic investigations; ratios in minerals and rocks have values ranging from about 07 to greater than 40 Because strontium has an electron configuration similar to that of calcium , it readily substitutes for Ca in minerals...
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(PDF) Strontium Isotope Stratigraphy
Sr isotopic composition of ocean and sea water is often studied by measuring the 87 Sr/ 86 Sr ratio in bottom sediment columns or in mollusk shells taken on sea shores (Banner, 2004; McArthur et ....
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Strontium isotopes
Strontium isotopes 87Sr/86Sr Iron-organic carbon aggregates River suspended matter Riparian zone Ultrafiltration Spring flood abstract The Kalix River shows distinct temporal variations in the Sr-isotope ratio in filtered water (0726e0732) During base flow in winter the 87Sr/86Sr ratio is on average 0730 When discharge increases and peaks...
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Written in Bone
Doug Price rests after chasing snails at the Maya city of Calakmul Snail shells help establish an area's strontium baseline (Courtesy Douglas Price) Most rocks carry a small amount of the element strontium (Sr) All elements have different forms, or isotopes, and the ratio of 87strontium and 86strontium isotopes varies according to local geology...
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(PDF) Strontium isotope stratigraphy
San Diego Formation using strontium isotope stratigraphy (McArthur et al, 2001; McArthur et al, 2012) of mollusk shells, thus enabling these faunas to be used to understand the effects of ....
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Environmental isotopes
Strontium-86 and strontium-87 are both stable isotopes of strontium, but strontium-87 is radiogenic, coming from the decay of rubidium-87 The ratio of these two isotopes depends on the concentration of rubidium-87 initially and the age of the sample, assuming that the background concentration of strontium-87 is known...
