strontium isotopes science


Strontium Isotopes on Water | Isobar Science

Strontium Isotopic Ratios of Water. Strontium isotopic ratios (87Sr/86Sr) can be used to detect and trace groundwater sources and interactions with local geology influenced by the flow path and rate of water underground. Sr isotopes can identify the mixing between different water bodies changes in watershed histories specify nutrient pathways determine groundwater determination and pinpoint the sources of salinity within freshwater systems.

Isotopes of strontium - Wikipedia

The alkaline earth metal strontium (38 Sr) has four stable naturally occurring isotopes: 84 Sr (0.56%) 86 Sr (9.86%) 87 Sr (7.0%) and 88 Sr (82.58%). Its standard atomic weight is 87.62(1). Only 87 Sr is radiogenic ; it is produced by decay from the radioactive alkali metal 87 Rb which has a half-life of 4.88 × 10 10 years (i.e. more than three times longer than the current age of the universe).

Facts About Strontium | Live Science

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Strontium Isotope Analysis « Center for Applied Isotope ...

Strontium isotopic ratios are widely used as tracers in geological processes and as indicators of provenance in an archaeological context. A significant fraction of the Earth’s 87 Sr is not primordial but is produced by the decay of 87 Rb. Geochemically Strontium follows Calcium while Rubidium follows Potassium; thus the geological variability of Sr isotope ratios in rocks is a function of both their age and chemical composition particularly their Ca/K ratios.

Strontium Isotope - an overview | ScienceDirect Topics

Strontium has four stable isotopes (84 Sr 86 Sr 87 Sr and 88 Sr) formed during the stellar synthesis. 87 Sr is the only stable isotope of Sr that is radiogenic (the radioactive decay of 87 Rb into the radiogenic isotope 87 Sr leads to an increase in the natural relative abundance of the last).

Sr-Nd Isotopes for Weathering Studies | Isobar Science

Figure 1. Strontium isotopes (87 Sr/ 86 Sr δ 88/86 Sr) measured in marine barite (BaSO 4) used to estimate the origin and deposition rate of weathered rock in the ocean.In this research Paytan et al. (2021) revealed how oceanic strontium sources and sinks changed over the past 35 million years.

A 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...

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strontium isotopes science