Water: Dating & Isotopic Analyses
Water’s continuous movement and flow of water across landscapes contribute
to and provide important clues into the intricacies of biogeochemical cycles
at various spatial and temporal scales.
About Daryll Orat
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Entries by Daryll Orat
Limestone: Dating & Isotopic Analyses
May 31, 2024 in Boron Isotopes, Geology, Strontium Chronology, Strontium Chronology /by Daryll OratLimestone is a granular sedimentary rock predominantly composed of
calcium carbonate (CaCO3), which commonly forms along shallow ocean
water beds from fossilized shells and exoskeletons of marine organisms.
Gypsum: Isotopes & Dating
December 17, 2023 in Archaeology, Archaeology, Archaeology, Archaeology, Archaeology, Archaeology, U-Th Dating /by Daryll OratGypsum is a relatively soft and common mineral made up of hydrous
calcium sulfate (CaSO4-2H2O). Whilst pure gypsum crystals are transparent
(often with a pearly or vitreous luster), they can appear opaque and colored
due to the inclusion of other materials (e.g. sand).
Strontium dating of foraminifera, shells & corals
November 22, 2023 in Company Updates, Petroleum, Strontium Chronology /by Daryll OratStrontium dating (as enabled by the 87Sr/86Sr ratio of marine carbonates) can be used to date various marine samples based on the premise that the mixing of oceanic strontium occurs relatively rapidly through time compared to the residence time of oceanic strontium.
Provenancing Dust in Ice Core records using Isotopes
September 18, 2023 in Paleontology / Paleoclimatology, Paleontology / Paleoclimatology, Paleontology / Paleoclimatology, Paleontology / Paleoclimatology, Paleontology / Paleoclimatology, Paleontology / Paleoclimatology, Paleontology / Paleoclimatology /by Daryll OratIce core records are an important foundational archive for paleoclimatology. Through them scientists have reconstructed high resolution atmospheric CO2 and temperature records covering hundreds of thousands of years.
Isotopic Analysis of Pottery & Food Residues
August 28, 2023 in Lead Isotopes /by Daryll OratArchaeological pottery samples can be provenanced through the analysis of the origin of its component clay and temper.
Quality Considerations for Bone Samples
July 24, 2023 in /by Daryll OratBones and teeth are relatively common within the archaeological and paleontological record due to the tendency for high preservation after burial.
NEW Strontium Chronology Service Available
June 6, 2023 in Archaeology, Paleontology / Paleoclimatology, Sr Isotopes, Sr Isotopes, Sr Isotopes, Sr Isotopes, Sr Isotopes /by Daryll OratIsobar Science is now offering a Strontium Chronology Service for dating marine carbonate samples. Strontium Isotope Ratios (87Sr/86Sr) within the ocean have varied through time, creating a predictable seawater curve that can be used for dating calibration.
Best Practices When Selecting Bone Samples
May 9, 2023 in U-Th Dating, U-Th Dating, U-Th Dating, U-Th Dating /by Daryll OratBones and teeth can be used for a variety of different isotopic analyses, including Oxygen, Strontium, Lead, Neodymium, Carbon, Nitrogen and dating (radiocarbon and in some cases Uranium-Thorium). There are important requirements for bone samples to ensure they produce accurate results.
Identifying Origin and Trade of Textiles using Strontium Isotopes
April 14, 2023 in Sr Isotopes /by Daryll OratArchaeological textiles can provide important evidence of social traditions and status, the economics of textile exchange, and evolving weaving technologies.