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High Microscale Variability in Raman Thermal Maturity Estimates from Shale Organic Matter - Data Release


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Jubb, A.M., Botterell, P.J., Birdwell, J.E., Burruss, R.C., Hackley, P.C., Valentine, B.J., and Hatcherian, J.J., 2018, High Microscale Variability in Raman Thermal Maturity Estimates from Shale Organic Matter - Data Release: U.S. Geological Survey data release,


Here the spatial variation in Raman estimates of thermal maturity within individual organic domains from several shale geologic reference materials originating from the Boquillas, Marcellus, Niobrara, and Woodford Formations are assessed from the respective Raman response. We show that for all four shales the thermal maturity parameters extracted from Raman spectra by iterative peak fitting can vary widely across distances of ≤5 µm within the same organic domain.


Attached Files

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T1_Representative Raman spectrum from the ShNIO sample with Lorentzian fit, fit residuals, and cubic baseline.csv 16.45 KB text/csv
T2_Position of the D1 peak center and the subsequent extracted Raman band separation as a function of wavelength.csv 2.95 KB text/csv
T3_Average Raman spectra from each shale GRM collected across a representative region of interest.csv 46.22 KB text/csv
T4_Raman band separation verus D1 over G intensity ratio across a representative region of interest for each shale GRM.csv 5.1 KB text/csv


Data were collected to characterize the heterogeneity of Raman thermal maturity estimates from shale organic matter.



  • Geology, Energy & Minerals (GEM) Science Center
  • USGS Data Release Products



Please see attached metadata record for full dataset provenance.

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doi doi:10.5066/P9D5ASO0

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