Community software for challenging isotope analysis: First applications of ‘Easotope’ to clumped isotopes

2016 ◽  
Vol 30 (21) ◽  
pp. 2285-2300 ◽  
Author(s):  
Cédric M. John ◽  
Devon Bowen
Keyword(s):  
Isotope Analysis ◽  
Clumped Isotopes ◽  
Community Software

Clumped Isotope Paleothermometry: Principles, Applications, and Challenges

2012 ◽  
Vol 18 ◽  
pp. 101-114 ◽  
Author(s):  
Hagit P. Affek
Keyword(s):  
Isotope Composition ◽  
Isotope Analysis ◽  
Atomic Scale ◽  
Clumped Isotopes ◽  
Temperature Dependent ◽  
Deep Time ◽  
Diagenetic Alteration ◽  
Carbonate Formation ◽  
Rare Isotopes ◽  
Clumped Isotope

Clumped isotopes geochemistry measures the thermodynamic preference of two heavy, rare, isotopes to bind with each other. This preference is temperature dependent, and is more pronounced at low temperatures. Carbonate clumped isotope values are independent of the carbonate δ13C and δ18O, making them independent of the carbon or oxygen composition of the solution from which the carbonate precipitated. At equilibrium, it is therefore a direct proxy for the temperature in which the carbonate mineral formed. In most cases, carbonate clumped isotopes record the temperature of carbonate formation, irrespective of the mineral form (calcite, aragonite, or bioapatite) or the organism making it. The carbonate formation temperatures obtained from carbonate clumped isotope analysis can be used in conjunction with the δ18O of the same carbonate, to constrain the oxygen isotope composition of the water from which the carbonate has precipitated. There are, however, cases of deviation from thermodynamic equilibrium, where both clumped and oxygen isotopes are offset from the expected values. Such carbonates must be characterized and calibrated separately. For deep-time applications, special care must be paid to the preservation of the original signal, in particular with respect to diagenetic alteration associated with atomic scale diffusion that may be undetectable by common tests for diagenesis.

Development of an In-Situ Mass Spectrometer for Stable Isotope Analysis

2003 ◽  
Author(s):  
R. T. Short ◽  
Gottfried P. Kibelka ◽  
Robert H. Byrne ◽  
David Hollander
Keyword(s):  
Stable Isotope ◽  
Mass Spectrometer ◽  
Stable Isotope Analysis ◽  
Isotope Analysis

ORGANIC MATTER ISOTOPE ANALYSIS OF ROSIER CREEK, A TRIBUTARY TO THE POTOMAC RIVER, VA

2016 ◽  
Author(s):  
Justin T. Hensley ◽  
◽  
J. Bradford Hubeny ◽  
Neil E. Tibert ◽  
John W. King
Keyword(s):  
Organic Matter ◽  
Isotope Analysis ◽  
Potomac River

SOURCES OF CARBONATE PRECIPITATION IN MONO LAKE SEDIMENTS: δ18O AND CARBONATE CLUMPED ISOTOPES AS LAKE LEVEL PROXIES

2017 ◽  
Author(s):  
Miquela Ingalls ◽  
◽  
Sophie Westacott ◽  
Makayla Betts ◽  
Jana Meixnerova ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Lake Level ◽  
Mono Lake ◽  
Carbonate Precipitation ◽  
Clumped Isotopes

LATE HOLOCENE HYDROCLIMATE RECONSTRUCTION FROM LAKE CHICHOJ, GUATEMALA USING STABLE ISOTOPE ANALYSIS OF SEDIMENTS

2017 ◽  
Author(s):  
Peter Mortensen ◽  
◽  
Nathan D. Stansell ◽  
Byron A. Steinman ◽  
Gilles Y. Brocard ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Late Holocene ◽  
Isotope Analysis
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