Testing Late Bronze Age mobility in southern Sweden …
Modern mobility studies of prehistoric individuals using strontium isotopes are dependent on the establishment of relevant bioavailable strontium isotope baselines. Strontium is a trace element, …Web
اقرأ أكثرStrontium Isotopes | SpringerLink
Rb-Sr systematics are based on the radioactive decay of the isotope 87 Rb (that today accounts for ~27% of all rubidium) to 87 Sr (~9% of all strontium) by beta decay with a half-life of approximately 49 billion years, corresponding to a Rb decay constant (λ 87 Rb) of 1.394 × 10-11 /a (Nebel et al., 2011b).A prime application of the decay scheme is …Web
اقرأ أكثرStrontium isotope analyses of archaeological cremated remains – …
Strontium isotope analyses have been carried out for several decades on tooth enamel of both animal and human remains from archaeological, ecological, and forensic contexts to shed light on the possible place of origin of particular individuals. ... 15: Szigetszentmiklós-Ürgehegy: Hungary: Central Hungary: Szigetszentmiklós: 16: Herstal ...Web
اقرأ أكثرPHYSICAL REVIEW RESEARCH1, 033113 (2019)
Strontium has four stable isotopes: three bosons (88Sr, 86Sr, and 84Sr) and one fermion (87Sr). Mixing between the singlet and triplet fine-structure manifolds leads to narrow-linewidth optical transitions, and these transitions have found use in both strontium and other alkaline-earth-(like)-atom ex-periments [10,11]. In particular for ...Web
اقرأ أكثرStrontium Isotope Stratigraphy
The lowermost 15% of the specimen is bleached from alteration, but patches of well-preserved calcite are still present toward the top of the specimen. (C) The sample is wholly altered and of no value to geochemistry. ... Strontium isotopes in biogenic phosphates from a Neogene marine formation: implications for palaeoseawater studies. …Web
اقرأ أكثرUSGS -- Isotope Tracers -- Resources
Periodic Table--Strontium. The alkali earth metal strontium has four stable, naturally occurring isotopes: 84 Sr (0.56%), 86 Sr (9.86%), 81 Sr (7.0%) and 88 Sr (82.58%). Only 87 Sr is radiogenic; it is produced by decay from the radioactive alkali metal 87 Rb, which has a half-life of 48,800,000 years. Thus, there are two sources of 87 Sr in any material: …Web
اقرأ أكثرFrontiers | Using the geographic detector model to identify factors
Strontium isotope ratios (87Sr/86Sr) are a widely applied tool in provenance applications in archaeology, paleoecology, forensics, and food science. Bedrock Sr is naturally and anthropogenically transferred to other reservoirs on the Earth's surface through interactions with the hydrosphere, atmosphere, and biosphere. We attempt to reassess …Web
اقرأ أكثرStrontium isotope analysis on cremated human …
The strontium isotope ratios for modern plants clearly distinguish the Ordovician and Silurian lithologies of west Wales (0.7095–0.7120) from the Cretaceous chalk of Wessex (0.7074–0.7090 ...Web
اقرأ أكثرStrontium and lead isotopes as environmental tracers in a
Strontium isotopes can be considered as tools to detect the influence of area sources external to the environmental system. ... P.O. Box 15.001, Porto Alegre, 91501-970, Brazil. Tiago De Vargas & Ari Roisenberg. Public Water and Wastewater Service of Caxias Do Sul, Nestor Mareira Street, nº 719, Neighborhood Lourdes, Caxias Do Sul, RS, 95052 ...Web
اقرأ أكثرStrontium Isotope Stratigraphy
Statistics for strontium isotope stratigraphy: a robust LOWESS fit to the marine strontium isotope curve for the period 0 to 206 Ma, with look-up table for the …Web
اقرأ أكثرStrontium isotope fractionation of planktic foraminifera and …
We have investigated the strontium isotope fractionation (Δ 88/ 86 Sr carb–aq) between inorganic calcite and aqueous Sr 2+ ions by precipitation experiments at a constant temperature of 25 °C and precipitation rates (R) ranging from 10 2.3 to 10 4.2 μmol/m 2 /h. Strontium isotope ratios were measured using the 87 Sr– 84 Sr double …Web
اقرأ أكثرFrontiers | 87Sr/86Sr in Archeological and Paleobiological …
Department of Anthropology, Rutgers University, New Brunswick, NJ, United States; The stable isotope ratio 87 Sr/ 86 Sr has been shown to have extraordinary potential for documenting the movement and life-histories of humans and other animals, both in history and prehistory. Thirty years of expanding applications has taken the …Web
اقرأ أكثرA 35-million-year record of seawater stable Sr isotopes
Here, we present a stable strontium (Sr) isotope record derived from pelagic marine barite. Our δ 88/86 Sr record exhibits a complex pattern, first declining between 35 and 15 million years ago (Ma), then increasing from 15 to 5 Ma, before declining again from ~5 Ma to the present. Numerical modeling reveals that the associated …Web
اقرأ أكثرA strontium isoscape for the Conchucos region of …
Strontium isotope (87Sr/86Sr) analysis of human skeletal remains is an important method in archaeology to examine past human mobility and landscape use. 87Sr/86Sr signatures of a given location are …Web
اقرأ أكثرFull article: A veritable confusion: use and abuse of isotope …
The dataset: Late Neolithic henge complexes of Wessex. Our original paper presents the isotope composition of teeth and jaws from 131 pig remains excavated at Mount Pleasant (Dorset), Durrington Walls, Marden and West Kennet Palisade Enclosures at Avebury (Wiltshire), examining strontium (87 Sr/ 86 Sr), oxygen (δ 18 O), sulphur (δ …Web
اقرأ أكثرSTRONTIUM ISOTOPES AND THE CHEMISTRY OF BONES …
One such substitution is strontium, which may replace calcium in trace quantities in bone and tooth enamel and dentin. The isotopes of strontium reflect ingested environmental strontium isotopes where an organism was living at the time the tissue formed. This principle is used to explore migration and residence in past human groups.Web
اقرأ أكثرAdvances in global bioavailable strontium isoscapes
Section snippets Strontium isotopes geochemistry. Strontium is a divalent alkaline earth trace element with four naturally occurring isotopes: 84 Sr (~0.56%), 86 Sr (~9.87%), 87 Sr (~7.04%) and 88 Sr (~82.53%). 84 Sr, 86 Sr, 87 Sr and 88 Sr are all stable isotopes (i.e., do not radioactively decay). Unlike the other Sr isotopes, 87 Sr is the …Web
اقرأ أكثرStrontium Isotope Characteristics (δ
The strontium isotopic data of the Arima saline water (87 Sr/ 86 Sr = 0.70853–0.70879; Kusuda et al., ... The strontium contents of the saline water (15.4–37.7 μg g −1) are more than two orders of magnitude higher than that of the Tansansen spring water (0.147 μg g −1).Web
اقرأ أكثرStrontium isotope analyses of archaeological cremated remains – …
Strontium isotope analyses have been carried out for several decades on tooth enamel of both animal and human remains from archaeological, ecological, and forensic contexts to shed light on the possible place of origin of particular individuals. ... 15: Szigetszentmiklós-Ürgehegy: Hungary: Central Hungary: Szigetszentmiklós [12] 16: …Web
اقرأ أكثرOn the road again—a review of pretreatment methods for the
Strontium has four naturally occurring isotopes: 84 Sr, 86 Sr, 87 Sr, and 88 Sr (Brown and Brown 2011; Pollard et al. 2017).The amounts of 84 Sr, 86 Sr, and 88 Sr in bedrock are constant and stable but 87 Sr is radiogenic and its amount is dependent on the 87 Rb content in the rock and how much of it has decayed into 87 Sr (Brown and Brown …Web
اقرأ أكثرIsotope-shift spectroscopy of the 1S0 → 3P1 and 1S0 → 3P0 …
The total illumination duration used for spectroscopy was set to between 1 and 15 ms, corresponding to multiple stroboscopic pulses, ... Spectroscopy of the 1 S 0 → 3 P 0 transition for each strontium isotope. The normalized atom number is shown as a function of the laser detuning. The solid line is a Gaussian fit to the data.Web
اقرأ أكثرStrontium Isotope
15.3.6.3.22 Strontium isotopes As shown earlier, the strontium isotope system ( 87 Sr/ 86 Sr) is a well-established tool in geochronology. In this method, the 88 …Web
اقرأ أكثرIt's Elemental
Strontium-90, a radioactive isotope of strontium, is a common product of nuclear explosions. It has a half-life of about 28.8 years and decays into yttrium-90 through beta decay. Strontium-90 is especially deadly since it has a relatively long half-life, is strongly radioactive and is absorbed by the body, where it accumulates in the skeletal ...Web
اقرأ أكثرSource of strontium in archaeological mobility studies
The strontium isotope composition of human tissues is widely used in archaeological mobility studies. However, little attention is paid to the relative con ... This can be seen as a strong correlation between skeletal strontium isotope composition, and δ 13 C and δ 15 N values reflecting the level of use of marine/freshwater resources. These ...Web
اقرأ أكثرGeochemical behavior of stable strontium isotopes during …
Much attention has been paid to Sr isotopes. Strontium (Sr), the most abundant trace element in rocks, soil, water, and organisms, is an alkaline earth metal with an atomic number of 38. ... Chao et al. (2015) calculated that 10 to 15% of 86 Sr precipitated into secondary carbonate minerals can result in 0.05‰ fractionation between river ...Web
اقرأ أكثرUSGS -- Isotope Tracers -- Resources
Periodic Table--Strontium The alkali earth metal strontium has four stable, naturally occurring isotopes: 84 Sr (0.56%), 86 Sr (9.86%), 81 Sr (7.0%) and 88 Sr (82.58%). …Web
اقرأ أكثرStrontium and oxygen isotope evidence for the origin and
The oxygen isotope data, coupled with the strontium results, provide new geographic resolution and indicate that the majority of the animals come from southern and western areas of Britain. ... This range has been defined for terrestrial grazing cattle as δ 13 C apatiteVPDB between − 15 and − 9‰ for pre-industrial British animals (Gan et ...Web
اقرأ أكثرPHYSICAL REVIEW RESEARCH1, 033113 (2019)
Strontium has four stable isotopes: three bosons (88Sr, 86Sr, and 84Sr) and one fermion (87Sr). Mixing between the singlet and triplet fine-structure manifolds leads to narrow …Web
اقرأ أكثرAssessing the mobility of Bronze Age societies in East-Central
A series of oxygen isotope analyses (conducted for all but one individuals studied with strontium isotopes) indicates that δ18O ratios measured in phosphate are in agreement with the predicted modern oxygen isotope precipitation values, and that this method is useful in detecting travels over larger distances. ... (δ 15 N) isotopic values for ...Web
اقرأ أكثرStrontium isotope evidence for the repeated formation of …
Strontium has four stable isotopes (84 Sr, 86 Sr, 87 Sr, and 88 Sr) with distinct nucleosynthetic origins. All 84 Sr is produced by the processes that generate p -nuclides ( Rauscher et al., 2013 ), while 86 Sr, 87 Sr, and 88 Sr are mainly produced by the s -process with a small (∼13%) contribution of the r -process to 88 Sr ( Sneden et al ...Web
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