strontium isotope marine
Stable strontium isotope fractionation in marine and ...
Stable strontium isotope fractionation in marine and terrestrial environments Abstract: The work reported in this thesis applies a new isotope tracer, stable strontium isotopes (δ 88/86 Sr), to address questions concerning changes in global climate that occur in response to continental weathering processes, and to constrain the modern marine geochemical Sr cycle.Get Price
Strontium isotope stratigraphy and paleomagnetic age ...
· Strontium isotope stratigraphy and paleomagnetic age constraints on the evolution history of coral reef islands, northern South China Sea ... School of Marine Sciences, Guangxi University, Nanning, Guangxi 530004, China. Search for other works by this author on: GSW. Google Scholar . Kefu Yu; Kefu Yu † 1. Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi ...Get Price
Constraining the Marine Sr Budget from Natural Strontium ...
Constraining the Marine Sr Budget from Natural Strontium Isotope Fractionation ... Here we present Strontium (Sr) isotope values which, unlike traditional radiogenic 87Sr/86Sr measurements, are not normalized to a fixed 88Sr/86Sr ratio of (defined as δ88/86Sr=0 relative to NIST SRM 987). Instead isotope fractionation induced during massspectrometry measurement is corrected for using ...Get Price
Dating marine sediments by strontium isotope stratigraphy
Dating marine sediments by strontium isotope stratigraphy John W. Farrell*, Steven C. Clemens, and L. Peter Gromet, Department of Geological Sciences, Brown University *now at Joint Oceanographic Institutions Plot of 87Sr/86Sr vs. age at Site 758. Line segments connect mean values of individual analyses from each sample. Upper and lower confidence intervals (±19 x 106) on the fifthorder ...Get Price
Isotope analysis is the identifiion of isotopic signature, the abundance of certain stable isotopes and chemical elements within organic and inorganic compounds. Isotopic analysis can be used to understand the flow of energy through a food web, to reconstruct past environmental and climatic conditions, to investigate human and animal diets in the past, for food authentifiion, and a ...Get Price
Using ocean models to predict spatial and temporal ...
May 09, 2017 · Stable hydrogen, oxygen, and strontium isotope ratios show relatively little spatial variation in seawater (Wassenaar 2008), but by contrast carbon (δ 13 C) and nitrogen (δ 15 N) isotope ratios show substantial spatiotemporal variations (, Rau et al. 1989, Francois et al. 1993, Goericke and Fry 1994, Jennings and Warr 2003, Barnes et al ...Get Price
Strontium stable isotope behaviour in foraminiferal ...
Strontium stable isotope behaviour in foraminiferal calcite and the retrieval of marine records. In: American Geophysical Union, Fall Meeting 2009, Dec 2009. Abstract. The strontium (88Sr/86Sr) stable isotope composition of seawater preserved in sedimentary foraminifera potentially provides key information on variations in the composition of material delivered by continental weathering and on ...Get Price
Strontium Isotopic Variations of Neoproterozoic Seawater ...
Strontium Isotopic Variations of Neoproterozoic Seawater: Impliions for Crustal Evolution The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Asmerom, Yemane, Stein B. Jacobsen, Andrew H. Knoll, Nicholas J. Butterfield, and Keene Swett. 1991. Strontium isotopic variations of Neoproterozoic seawater ...Get Price
Strontium Isotope Stratigraphy: LOWESS Version 3: Best Fit ...
An improved and updated version of the statistical LOWESS fit to the marine 87 Sr/ 86 Sr record and a revised look‐up table (V3:10/99; available from [email protected]) based upon it enables straightforward conversion of 87 Sr/ 86 Sr to numerical age, and vice versa, for use in strontium isotope stratigraphy (SIS). The table includes 95% confidence intervals on predictions of numerical age ...Get Price
Hess, J et al. (1986): Strontium isotope ratios of pore ...
The evolution of the strontium isotopic ratio in seawater offers a means to evaluate longterm changes in the global strontium isotope mass balance. Results show that the marine strontium isotope composition can be used for correlating and dating wellpreserved authigenic marine sediments throughout much of the Cenozoic to a precision of +/ 1 million years. The strontium87 to strontium .Get Price
Stable isotope stratigraphy
The strontium isotope technique is especially useful in highlatitude and shallowwater marine sections of middle to late Tertiary age where biostratigraphic zones have relatively long durations and diagnostic calcareous taxa are often absent or difficult to identify. Figure 4 shows 87 Sr/ 86 Sr age estimates based on isotopic analysis of ...Get Price
Carbon, oxygen and strontium isotope composition of ...
The bulkrock stable isotopes of the micritic basinal facies gradually change from normal marine (δ13C ~ +2‰, δ18O ~ –2‰ VPDB) to lower values (δ13C ~ 0‰, δ18O ~ –6‰) in a ~ 40 m thick interval including Plattenkalk and suggest ageing of the bottom waters. The surrounding reefs are isotopically nearly invariant (δ13C ~ +2‰, δ18O ~ –2‰ VPDB). An isotope anomaly (δ13C of ...Get Price
(PDF) Strontium Isotope Stratigraphy
Strontium isotope stratigraphy (SIS) can be used to estimate the duration of stratigraphic gaps (Miller et al., 1988), estimate the duration of biozones (McArthur et al., 1993, 2000, 2004) and ...Get Price
Frontiers | Stable Strontium Isotopic Compositions of ...
· The Sr isotopic composition of rivers and groundwaters in the Bengal Plain is a major contributor to the global oceanic Sr inventory. The stable strontium isotope ratios (δ88Sr) provide a new tool to identify chemical weathering reactions in terrestrial water. In this study, we investigated the spatiotemporal variations of δ88Sr in samples of river water, bedload sediment, and groundwater ...Get Price
Stratigraphic correlation of Pleistocene California ...
May 01, 1990 · Conference: Stratigraphic correlation of Pleistocene California borderland marine carbonate using strontium isotopesGet Price
Precambrian marine carbonate isotope database: Version ...
·  We present a compilation of strontium, carbon, and oxygen isotope compositions of roughly 10,000 marine carbonate rocks of Archean ‐ Ordovician age (3800 Ma – 450 Ma). The Precambrian Marine Carbonate Isotope Database (PMCID) has been compiled from 152 published and 3 unpublished articles and books of the past 40 years.Get Price
Hydrological Changes in Restricted Basins: Insights From ...
· A similar increase to normal marine strontium isotope ratios is not observed in the Dacian Basin at the MiocenePliocene boundary (Figure 8). Instead, 87 Sr/ 86 Sr records a drop across this transition, suggesting that marine waters had not entered the Dacian Basin. This observation is in agreement with paleontological proxies indiing no marine influence at this time in the Dacian Basin .Get Price
Report: Ocean Ventilation in the Ordovician: Potential ...
Report: Ocean Ventilation in the Ordovician: Potential Impact on Marine Strontium Isotope Compositions (61st Annual Report on Research Under Sponsorship of The American Chemical Society Petroleum Research Fund): 61st Annual Report on Research Under Sponsorship of The American Chemical Society Petroleum Research FundGet Price
EarlyMiddle Permian strontium isotope stratigraphy of ...
Mar 18, 2021 · 10Sep2020 . Dear Mr. Li, It is a pleasure to accept your manuscript entitled "EarlyMiddle Permian strontiumisotope stratigraphy of marine carbonates from the northern marginal areas of South China: controlling factors and impliions" in its .Get Price
Strontium Isotope Stratigraphy: LOWESS Version 3: Best Fit ...
Strontium Isotope Stratigraphy: LOWESS Version 3: Best Fit to the Marine Sr‐Isotope Curve for 0–509 Ma and Accompanying Look‐up Table for Deriving Numerical Age. J. M. McArthur, R. J. Howarth, and ; T. R. Bailey; J. M. McArthur. Geological Sciences, University College London, Gower Street, London WC1E 6BT, United Kingdom (e‐mail: [email protected]) Search for more articles by this ...Get Price
Strontiumisotope evidence for marine or fresh water ...
Sep 12, 1970 · 1. Nature. 1970 Sep 12;227(5263):1159. Strontiumisotope evidence for marine or fresh water origin of fossil dipnoans and arthrodires. Dasch EJ, Campbell KS.Get Price
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