Results 1 to 10 of about 644,725 (312)

Seawater strontium isotopes, oceanic anoxic events, and seafloor hydrothermal activity in the Jurassic and Cretaceous

open access: yesAmerican Journal of Science, 2001
There were three negative seawater strontium-isotope excursions (shifts to lower 87 Sr/ 86 Sr values) during the Jurassic and Cretaceous that were of relatively short duration (5-13 my) and showed a relatively quick recovery to pre-excursion 87 Sr/ 86 Sr
C. E. Jones, H. Jenkyns
semanticscholar   +1 more source

Determination of strontium isotope ratios in plant samples by wet ashing digestion

open access: yesResults in Earth Sciences
Strontium isotope provenance analysis has been widely applied across multiple disciplines, including archaeology, food science, and forensics. The establishment of bioavailable ⁸⁷Sr/⁸⁶Sr maps, known as isoscapes, which rely on a substantial number of ...
Wenyan Cheng   +3 more
doaj   +1 more source

Role of stable isotope analyses in reconstructing past life-histories and the provenancing human skeletal remains: a review

open access: yesAnthropological Review, 2017
This article reviews the present scenario of use of stable isotopes (mainly δ13C, δ15N, δ18O, 87Sr) to trace past life behaviours like breast feeding and weaning practices, the geographic origin, migration history, paleodiet and subsistence patterns of ...
Sehrawat Jagmahender Singh   +1 more
doaj   +1 more source

Source of Lake Vostok Cations Constrained with Strontium Isotopes

open access: yesFrontiers in Earth Science, 2016
Lake Vostok is the largest sub-glacial lake in Antarctica. The primary source of our current knowledge regarding the geochemistry and biology of the lake comes from the analysis of refrozen lake water associated with ice core drilling. Several sources of
William Berry Lyons   +4 more
doaj   +1 more source

Oxygen–Carbon and Strontium Isotope Composition in Primary Carbonatites of the World: The Data Summary and Linear Trends

open access: yesРуды и металлы
A statistical regression analysis was performed of a summary of borrowed literary iso- topic data on 176 carbonatite occurrences worldwide (a total of 1829 paired δ18О-δ13С values in primary carbonatites).
Bolonin A. V.
doaj   +1 more source

Repumping and spectroscopy of laser-cooled Sr atoms using the (5s5p)3P2 - (5s4d)3D2 transition

open access: yes, 2009
We describe repumping and spectroscopy of laser-cooled strontium (Sr) atoms using the (5s5p)3P2 - (5s4d)3D2 transition. Atom number in a magneto-optical trap is enhanced by driving this transition because Sr atoms that have decayed into the (5s5p)3P2 ...
A J Traverso   +8 more
core   +1 more source

The structure and energetics of $^3$He and $^4$He nanodroplets doped with alkaline earth atoms

open access: yes, 2007
We present systematic results, based on density functional calculations, for the structure and energetics of $^3$He and $^4$He nanodroplets doped with alkaline earth atoms.
Blom, Martine N.   +7 more
core   +2 more sources

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