1887

Abstract

Summary

We present and test here the first tandem application of two new geochemical tools, Δ47 and U-Pb, in the case of carbonate rocks of the Paris Basin. Δ47 (the carbonate clumped isotopes thermometer) allows the determination the absolute temperature and oxygen isotope composition of the fluid at the time of precipitation. U-Pb analyses by LA-SF-ICPMS allow to date carbonate crystallization directly on thin sections. In tandem these two proxies allow to access the thermo-chronological evolution of carbonate rocks and to calibrate their paragenetic sequences both in time and temperature.

Here, we validate this thermo-chronological approach using the paragenetic sequence of a well constrained carbonate reservoir unit, that host four singular and successive generations of carbonate cements formed throughout the diagenetic history in the Paris Basin.

Each cement generation has been separately characterized by both Δ47 thermometry and U/Pb dating. The obtained Δ47 temperatures compare well with the more conventional fluid inclusions micro thermometry and the thermal history deduced from both Δ47 temperature and U-Pb ages agrees with the modeled thermal history reconstructed from backstripping approach and calibrated with vitrinite reflectance data.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201602335
2016-10-03
2021-06-13
Loading full text...

Full text loading...

References

  1. Eiler, J. M.
    (2007). “Clumped-isotope” geochemistry-The study of naturally-occurring, multiply-substituted isotopologues. Earth and Planetary Science Letters, 262(3–4), 309–327. http://doi.org/10.1016/j.epsl.2007.08.020
    [Google Scholar]
  2. Friedman, I., and O’Neil, J. R.
    (1977). Data of Data of Geochemistry Sixth Edition. Geological Survey Professional Paper, 440-KK, 1–117.
    [Google Scholar]
  3. Horita, J.
    (2014). Oxygen and carbon isotope fractionation in the system dolomite–water–CO2 to elevated temperatures. Geochimica et Cosmochimica Acta, 129, 111–124. http://doi.org/10.1016/j.gca.2013.12.027
    [Google Scholar]
  4. Li, Q., Parrish, R. R., Horstwood, M. S., and McArthur, J. M.
    (2014). U–Pb dating of cements in Mesozoic ammonites. Chemical Geology, 376, 76–83. http://doi.org/10.1016/j.chemgeo.2014.03.020
    [Google Scholar]
  5. Rasbury, E. T., and Cole, J. M.
    (2009). Directly dating geologic events: U-Pb dating of carbonates. Reviews of Geophysics, 47(3), 1–27. http://doi.org/10.1029/2007RG000246
    [Google Scholar]
  6. Smith, P. E., Farquhar, R. M., and Hancock, R. G.
    (1991). Direct radiometric age determination of carbonate diagenesis using U-Pb in secondary calcite. Earth and Planetary Science Letters, 105(4), 474–491. http://doi.org/darobfita
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201602335
Loading
/content/papers/10.3997/2214-4609.201602335
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error