Isobar Science and Beta Analytic’s webinar on sediments focuses on dating & environmental reconstructions. This complimentary webinar takes place on December 2, 2021 at 12:00 PM Eastern Time (US and Canada).
Sediments used for climate and environmental reconstructions come in many different forms (including lacustrine, marine, peat, terrestrial and aeolian deposits) and can be characterized by their grain size, shape, sedimentary facies, chemical and biological composition and accumulation/sedimentation rate.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngHaley Gershon2021-11-02 15:54:052021-11-02 19:36:14Analysing lake sediment cores: from dating to paleoclimate reconstructions
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngHaley Gershon2021-10-20 17:25:042021-10-20 17:25:05How to choose optimal samples for U-Th dating
Isobar Science and Beta Analytic’s bones webinar focuses on C-14 and U-Th methods for bone samples. Topics include optimal sample types, common issues, and how to prepare bone samples for isotopic analysis.
In geochemical research, stable and unstable isotopes are used to understand the chemistry behind natural processes. Isotopes are different forms of a single element, with differing numbers of neutrons within their nucleus, resulting in different atomic masses.
Paleoclimate archives are generally dated using two main methods: radiocarbon and uranium-thorium dating. 14C dating tends to be more accurate, however, it can only be used on samples that are less than around 50,000 years old. Whereas U-Th dating can be used for the last 500,000 years.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngHaley Gershon2021-09-28 13:01:422021-09-28 13:50:30Developing Chronologies for Reconstructing Past Climates
Stable and radioactive isotopes can be analysed in groundwater and surface water samples in order to assess the magnitude and origin of pollution, rate of pollution infiltration into the environment, and timing of water interactions with the atmosphere.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngHaley Gershon2021-09-07 15:29:112021-10-05 13:17:35Paleoclimatology Webinar: Isotopes in dating and climate-proxy relationships
The origin and movement of atmospheric dust can be estimated by analysing the geochemistry of dust collected directly from the atmosphere or from the dust layers found within ice cores or lacustrine and ocean sediment cores.
Shells, corals and other carbonates are widely used in order to assess variability in climate and environmental conditions in time. A variety of stable and radioactive isotopes can be used to date these samples and provide further information on environmental context during their lifespan.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-07-22 19:12:102021-09-28 12:37:25Shells, corals and other carbonates
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-07-12 19:25:492021-09-17 18:39:45The use of isotopic analysis on bones: dating, environmental analysis & migration
The most optimal samples for accurate U-Th dating are those that exist in closed systems, including speleothems and corals. In some cases, bones and lake sediments may also be used, but the state of your samples should be carefully considered prior to planning your analysis and interpreting U-Th dating results.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-06-21 16:07:002021-09-17 18:33:51Assumptions for U-Th Dating: Open vs. Closed Systems
View our on-demand webinar “Geochemical Fingerprinting: Application of Sr-Nd-Hf-Pb Isotope Systematics in Earth Science.” Topics include: how different processes control the distribution of elements in the earth system; measuring Sr, Nd, Hf, and Pb and reporting conventions; application of Sr-Nd-Hf-Pb systematics in studying the governing processes in the earth system; research design and sampling strategies; and what to expect from your lab when measuring Sr-Nd-Hf-Pb isotopes.
Sr, Nd, Hf and Pb are four isotopes that are inherent in many geological settings, and thus have been used to trace the evolution of metamorphic and igneous rocks, track the origin of sediments and dust, analyze weathering regimes and reconstruct past ocean circulation.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-05-19 16:24:212021-09-17 18:31:00Strontium, Neodymium, Hafnium, and Lead Isotope Systematics in Earth Science
The study of past climates (paleoclimatology) offers an opportunity to improve the predictability of future climate change. The stable isotopes of boron (δ11B) and oxygen (δ18O) are two important variables used to reconstruct climate in a variety of natural archives.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-04-13 13:25:232021-09-17 18:29:19Studying past climates using stable isotopes
Using isotopic analysis of skeletal remains and forensic evidence, one can reconstruct human profiles, analyse the environmental conditions antemortem and estimate the time of death. Other forensics-related investigations using isotope geochemistry include the analysis of trace evidence materials as well as provenancing illegal wildlife, bullets, narcotics, and other forensic evidence.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-03-31 19:22:562021-09-28 12:31:51Isotopic analysis in forensic geography
Understanding the movement of herbivores across a landscape and ecological dynamics through time is important for current conservation and ecosystem management, while providing valuable insights into evolution and adaptation. Documented historical evidence in the relationship between organisms and their surrounding vegetation is generally limited and thus isotopic analysis of fossils can provide valuable insights into this important area of research.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-03-16 18:15:232021-09-17 18:11:34Tracing the diet of herbivores and omnivores through isotopic analysis
The analysis of the uranium-thorium (U-Th) decay chain can be used to date a variety of calcium carbonate (CaCO3) bearing samples, including cave deposits (e.g. speleothems), calcium carbonate rock, corals, shells and (in some cases) bones. This method can be used to date samples existing from present day until 500,000 calendar years before present.
https://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.png00isobarhttps://isobarscience.com/wp-content/uploads/2019/12/logoisobar-20-300x113.pngisobar2021-02-15 15:19:302021-09-17 15:52:21U-Th Dating vs Radiocarbon Dating
The EGU General Assembly 2020 has moved online. EGU2020: Sharing Geoscience Online is free and open to anyone, no registration required. So, come hear Isobar Science research & development scientist Dr. Arash Sharifi present evidence from Iranian stalagmites that early human mobility in SW Asia was driven by regional climate change events.
Isobar Science is a subsidiary of radiocarbon dating and biobased testing laboratory Beta Analytic. Isobar Science provides high-quality stable isotope analysis with timely data for the following services: Sr isotopes, U-Th dating, Pb isotopes, B isotopes, Sr-Nd-Hf isotopic ratios.