Reducing Uncertainties in Carbonate Clumped Isotope Analysis Through Consistent Carbonate-Based Standardization
نویسندگان
چکیده
منابع مشابه
Temperatures of Aqueous Alteration on Cm Chondrite Parent Bodies Based on Carbonate ‘clumped-isotope’ Thermometry
Introduction: Aqueous alteration of primitive meteorites was among the earliest differentiation processes in the solar system [1], and a better understanding of it would help constrain and test models of the thermal and chemical evolution of planetesimals. One of the challenges is to establish the temperatures of alteration. Petrographic analysis of CM matrices [2] suggest their temperatures of...
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RATIONALE The measurement of multiply substituted isotopologues of CO2 derived from carbonate has allowed the reconstruction of paleotemperatures from a single phase (CaCO3 ), circumventing uncertainty inherent in other isotopic paleothermometers. Traditional analytical techniques require relatively large amounts of carbonate (3-8 mg per replicate), which limits the applicability of the clumped...
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[1] The elevation history of Earth’s surface is key to understanding the geodynamic processes responsible for the rise of plateaus. We investigate the timing of Colorado Plateau uplift by estimating depositional temperatures of Tertiary lake sediments that blanket the plateau interior and adjacent lowlands using carbonate clumped isotope paleothermometry (a measure of the temperature‐dependent ...
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Much of what we know about the history of Earth’s climate derives from the chemistry of carbonate minerals in the sedimentary record. The oxygen isotopic compositions (dO) of calcitic marine fossils and cements have been widely used as a proxy for past seawater temperatures, but application of this proxy to deep geologic time is complicated by diagenetic alteration and uncertainties in the dO o...
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Here we calibrate the carbonate clumped isotope thermometer in modern deep-sea corals. We examined 11 specimens of three species of deep-sea corals and one species of a surface coral spanning a total range in growth temperature of 2–25 C. External standard errors for individual measurements ranged from 0.005& to 0.011& (average: 0.0074&) which corresponds to 1–2 C. External standard errors for ...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2018
ISSN: 1525-2027
DOI: 10.1029/2017gc007385