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Application of Clumped Isotope Thermometry to burial diagenetic and low temperature hydrothermal systems.

English title Application of Clumped Isotope Thermometry to burial diagenetic and low temperature hydrothermal systems.
Applicant Bernasconi Stefano
Number 143485
Funding scheme Project funding
Research institution Geologisches Institut ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Geochemistry
Start/End 01.02.2013 - 31.03.2015
Approved amount 230'999.00
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All Disciplines (2)

Discipline
Geochemistry
Geology

Keywords (8)

Burial Diagenesis; clumped isotopes; dolomite; carbonate precipitation; oxygen isotopes; mass spectrometry; stable isotope geochemistry; calcite

Lay Summary (German)

Lead
Die Geochemie der „clumped isotopes“ in Karbonaten befasst sich mit der Bestimmung der Häufigkeit der CO2-Moleküle die aus den Isotopen 13C und je einem 16O und 18O bestehen. Gemäss vorgängigen Studien ist ihre Häufigkheit temperaturabhängig. Anders als bei der herkömmlichen Temperaturbestimmungsmethoden mittels d18O, ist der Einfluss der Isotopenzusammensetzung des Umgebungsfluides auf die „clumped isotopes“ vernachlässigbar.
Lay summary

Ziel und Inhalt

Es gibt diverse Studien über die Bildung von „clumped isotopes“ bei Temperaturen von unter 70°C, ein genaues “Thermometer” fehlt jedoch noch. 
Diese Studie will zusätzliche experimentelle Daten generieren damit eine solide Basis für die Kalibration des Thermometers geschaffen werden kann, indem die Häufigkeit der schweren CO2-Moleküle bei kontrollierten Ausfällungstemperaturen von 25°C bis 200°C systematisch untersucht wird. 

Die Kalibration wird in 2 Feldstudien getestet. Sowohl das hydrothermale Dolomitsystem von Pozalagua in Cantabrien (Nordspanien) und das „burial dolomitization system“ der Nisku-Formation in Zentralalberta (Kanada) erlauben durch ihre Aufschlussgeometrie und der Ausfällungssequenz der Minerale eine äusserst präzise Beprobung und sollen so die nötigen Ergebnisse liefern.


Wissenschaftlicher Kontext

Mit Hilfe der experimentellen Kalibration der „clumped isotopes“ Fraktionierung bei hohen Temperaturen und den vorgeschlagenen Feldstudien sollen offene Fragen zur Bildung von Dolomit beantwortet werden. Ebenso kann diese Methode wichtige Informationen zur Rekonstruktion der thermischen Bildungsgeschichte von Sedimenten liefern, welche eine wichtiger Schritt zum Verständnis der sedimentären Beckenbildung und der Entstehung von Erdöl bilden.


Direct link to Lay Summary Last update: 28.11.2012

Responsible applicant and co-applicants

Employees

Publications

Publication
CONSTRAINING TEMPERATURES OF FORMATION AND COMPOSITION OF DOLOMITIZING FLUIDS IN THE UPPER DEVONIAN NISKU FORMATION (ALBERTA, CANADA) WITH CLUMPED ISOTOPES
Millan M. Isabel, Machel Hans G., Bernasconi S.M. (2016), CONSTRAINING TEMPERATURES OF FORMATION AND COMPOSITION OF DOLOMITIZING FLUIDS IN THE UPPER DEVONIAN NISKU FORMATION (ALBERTA, CANADA) WITH CLUMPED ISOTOPES, in Journal of Sedimentary Research, 86, 107-112.
Siderite acid fractionation factors for sealed and open vessel digestions at 70 °C and 100 °C
Fernandez A., van Dijk J., Müller I.A., Bernasconi S.M. (2016), Siderite acid fractionation factors for sealed and open vessel digestions at 70 °C and 100 °C, in Chemical Geology, 444, 180-186.
Long-term performance of the Kiel carbonate device with a new correction scheme for clumped isotope measurements
Meckler Anna Nele, Ziegler Martin, Millán M. I., Breitenbach Sebastian F M, Bernasconi Stefano M. (2014), Long-term performance of the Kiel carbonate device with a new correction scheme for clumped isotope measurements, in Rapid Communications in Mass Spectrometry, 28(15), 1705-1715.
Temperature dependence of oxygen- and clumped isotope fractionation in carbonates: A study of travertines and tufas in the 6-95°C temperature range
Kele Sándor, Kele Sándor, Breitenbach Sebastian F M, Breitenbach Sebastian F M, Capezzuoli Enrico, Meckler A. Nele, Ziegler Martin, Millan Isabel M., Kluge Tobias, Kluge Tobias, Deák József, Hanselmann Kurt, John Cédric M., Yan Hao, Liu Zaihua, Bernasconi Stefano M., Temperature dependence of oxygen- and clumped isotope fractionation in carbonates: A study of travertines and tufas in the 6-95°C temperature range, in Geochimica et Cosmochimica Acta.

Collaboration

Group / person Country
Types of collaboration
Dr. Miguel-Anguel Lopez-Horgue/University of the Basque country, Bilbao, Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Hans Machel/University of Alberta Canada (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Liane Benning/University of Leeds Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Goldschmidt Conference 2014 Talk given at a conference Calibration of the clumped isotope thermometer on natural travertine carbonates in the 5-95 C temperature range 09.06.2014 Sacramento, United States of America Bernasconi Stefano;
GOldschmidt Conference, Florence Italy Talk given at a conference Late Cretaceous sub-tropical pacific ocean clumped isotope palaeothermometry 26.08.2013 Florence, Italy Bernasconi Stefano;
Goldschmidt 2013 Conference Talk given at a conference A new calibration of the carbonate clumped isotope thermometer baed on synthetic calcites 25.08.2013 Florence, Italy Bernasconi Stefano;


Associated projects

Number Title Start Funding scheme
160377 Glacial-interglacial temperature changes based on clumped isotopes in foraminifera from the Mediterranean Sea. 01.01.2015 International short research visits
115934 Multidisciplinary study of continental/ocean climate dynamics using high-resolution records from the eastern mediterranean (MOCCHA) 01.04.2008 Project funding (special)
154501 4th International Workshop on Clumped Isotopes 01.08.2014 Scientific Conferences
134987 Multidisciplinary study Of Continental/ocean Climate dynamics using High-resolution records from the eastern mediterraneAn (MOCCHA): Part 2 01.04.2011 Project funding
169849 Improving the reconstruction of deep-time paleoclimate and diagenetic history of sedimentary basins with carbonate clumped isotopes. 01.01.2017 Project funding
160046 Clumped Isotope Thermometry in burial diagenetic systems - part 2: new constraints on the kinetics of 13C-18O bond reordering from contact metamorphic aureoles of magmatic intrusions 01.04.2015 Project funding
160046 Clumped Isotope Thermometry in burial diagenetic systems - part 2: new constraints on the kinetics of 13C-18O bond reordering from contact metamorphic aureoles of magmatic intrusions 01.04.2015 Project funding

Abstract

Summary of research planCarbonate clumped isotope thermometry is based on the measurement of the excess abundance of 13C-18O bonds in carbonates above a theoretical random distribution, which has been shown to be temperature-dependent (Ghosh et al., 2006a). Unlike the conventional carbonate-water isotopic thermometers (Urey, 1947) this novel method allows to reconstruct the precipitation temperature of carbonate minerals independently of d18O of the fluids in which the mineral grew. In addition, in combination with the oxygen isotope composition of the carbonate, it is possible to reconstruct the d18O of these fluids. This thermometer has been calibrated for various synthetic and natural biogenic and abiogenic minerals at temperatures below ~70ºC, but important uncertainties in the calibration still remain. A theoretical calibration between high temperatures carbonates and the abundance of 13C-18O bonds in carbonates has been proposed by Guo et al. (2009), and confirmed by Bonifacie et al. (2011) and Bristow et al. (2011). But no detailed calibration has been published to date and there is a necessity of additional experimental data to provide a more robust calibration for further applications at higher temperatures. So far, clumped isotope thermometry has been mainly used in paleoclimate studies, but it has a great and still almost unexplored potential to solve long-standing questions in burial diagenetic and low-temperature (25 to 250°C) hydrothermal studies.The goals of this project are:1) To provide a calibration of the clumped isotope thermometer with natural and synthetic carbonates precipitated at under well-defined conditions at temperatures between 25 and 200°C.2) To assess the potential and limitations of the method in two case studies: a) the hydrothermal dolomite system of Pozalagua in Cantabria, northern Spain, and b) the burial dolomitization system of the Nisku formation in central Alberta, Canada. These systems were chosen because the outcrop geometry and the sequences of mineral precipitations allow a very precise sampling of subsequent generation of carbonate generations. Moreover, there is the large amount existing additional data in terms of regional geology, burial history, and geochemical and petrographic studies that will allow a robust evaluation of the potential and limitations of clumped isotopes in high-temperature diagenetic systems.With the experimental calibration of clumped isotope fractionation at high temperatures and the proposed case studies we will be able to answer outstanding questions in the formation processes of dolomite systems such as timing and the origin of the dolomitizing fluids. Besides, we will demonstrate the potential and limitation of this method to reconstruct the thermal history of sedimentary rocks, an important step of understanding the history of sedimentary basins and the generation of petroleum.
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