Clumped isotope thermometry of calcite and dolomite in a contact metamorphic environment
نویسندگان
چکیده
منابع مشابه
Use of Clumped-isotope Thermometry to Constrain the Crystallization Temperature of Diagenetic Calcite
We describe an approach to estimating the crystallization temperatures of diagenetic calcites using clumped-isotope thermometry, a paleothermometer based on the C–O-bond enrichment in carbonates. Application of this thermometer to calcified gastropod shells and calcite cements in an early Eocene limestone from the Colorado Plateau reveals a record of calcite precipitation and replacement at tem...
متن کاملOxygen Isotope Fractionation between Coexisting Calcite and Dolomite.
The oxygen isotopic composition of calcite from carbonate rocks of the lower unit of the Flagstaff formation (Paleocene) exposed along the western margin of the Wasatch Plateau, Utah, is about 7 per mil lower than that of coexisting dolomite, suggesting that isotopic equilibration of these two minerals can occur at relatively low temperatures. Unlike recent isotopic evidence presented by Degens...
متن کاملInfluence of climate change and uplift on Colorado Plateau paleotemperatures from carbonate clumped isotope thermometry
[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 ...
متن کاملClumped isotope thermometry of carbonatites as an indicator of diagenetic alteration
We measure the clumped isotopic signature of carbonatites to assess the integrity of the clumped isotope paleothermometer over long timescales (10–10 years) and the susceptibility of the proxy to closed system re-equilibration of isotopes during burial diagenesis. We find pristine carbonatites that have primary oxygen isotope signatures, along with a Carrara marble standard, do not record clump...
متن کاملCarbonate clumped isotope thermometry of deep-sea corals and implications for vital effects
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 ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geochimica et Cosmochimica Acta
سال: 2017
ISSN: 0016-7037
DOI: 10.1016/j.gca.2016.10.037