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In petroleum exploration, it is vital to be able to interpret and date key occurrences within petroleum systems – including petroleum generation and alteration (post-generation). For example, identifying and dating the occurrence of certain authigenic minerals (e.g. carbonate cements) can provide information on when and where oil is likely to accumulate to aid in targeting exploration.
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The details of animal origin and migratory routes through terrestrial and aquatic systems can be traced through the analysis of various stable isotopes including strontium, neodymium, carbon and oxygen.
Lead isotopes (Pb) are known to be a very toxic non-essential element, with origins within the earth’s crust. Through anthropogenic activities, lead becomes altered and released into the atmosphere, where it acts as a trace aerosol pollutant.
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https://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.png00isobarhttps://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.pngisobar2022-04-05 22:20:062022-04-06 14:39:54Isobar Science Exhibits at SAA 2022
A study researchering the dynamics of carbonate stratigraphy and vulnerability of sea life to climate change used a combination of radiocarbon and U-Th dating of corals and cemented sediments to date an incipient submarine landslide
https://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.png00isobarhttps://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.pngisobar2022-02-25 09:09:172022-02-25 17:47:24A highlight on tsunami research: Professor Sam Purkis
Volcanic eruptions are significant geological events with far reaching implications. The analysis of isotopes in various sample types can provide information on the timing and magnitude of past volcanic eruptions.
Boron isotopes are predominately made up of two naturally occurring stable isotopes – 10B and 11B. In the biosphere, boron represents a trace element integrated into organisms, allowing one to reconstruct variability in δ11B over time.
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Strontium ratios have varied in the world’s oceans through time as a result of fluctuations in strontium type and availability, often resulting from weathering of continental materials as well as volcanic activity at the mid-oceanic ridge. Such variations are recorded in oceanic sediment as a result of the precipitation of minerals from seawater, which has been used as a basis for the 87Sr/86Sr marine curve.
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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/2022/03/isobar-logo-300x108.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.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/2022/03/isobar-logo-300x108.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.pngHaley Gershon2021-10-20 17:25:042022-03-29 02:29:21How 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/2022/03/isobar-logo-300x108.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.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/2022/03/isobar-logo-300x108.png00Haley Gershonhttps://isobarscience.com/wp-content/uploads/2022/03/isobar-logo-300x108.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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.