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Minisini, Daniel (2017): Chronostratigraphic framework and depositional environments in the organic rich Eagle Ford Group. PANGAEA, https://doi.org/10.1594/PANGAEA.878564, Supplement to: Minisini, Daniel; Eldrett, James S; Bergman, Steven; Forkner, Rob (2018): Chronostratigraphic framework and depositional environments in the organic‐rich, mudstone‐dominated Eagle Ford Group, Texas, USA. Sedimentology, 65(5), 1520-1557, https://doi.org/10.1111/sed.12437

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Abstract:
Since the beginning of the century, several authors have hypothesized and documented the presence of bottom currents during the deposition of mudstones, including mudstones rich in organic matter, challenging the assumption that persistent low-energy conditions are necessary prerequisites for deposition of such sediments. More processes responsible for transport and deposition of mudstones means also more processes acting contemporaneously in different parts of a basin. Without a precise and robust chronostratigraphic framework, however, it is not possible to characterize these differences. The new data reported here provide a profoundly different understanding of the controls on sedimentation in distal continental shelf platforms. To enhance the understanding of the different coeval environments of deposition coexisting in a muddy system, the Upper Cretaceous Eagle Ford Group, deposited on the Comanche carbonate platform, has been investigated by integrating sedimentology, mineralogy, geochemistry and palaeoecology and creating age models in different physiographic sectors using biostratigraphy and geochronology. Data from two cores and 41 outcrops were analyzed with a telescopic approach, from grain scale to basin-scale. Nine temporal stages over a ca 8 Myr interval (ca 98 to 90 Ma) were defined in an area that spans 75,000 km**2. Finally, the different environments of deposition recorded within each of the nine stages were interpreted. The construction of the chronostratigraphic framework also allowed: measuring the duration of a basin-wide gradational increase of energy in the water column (ca 1 Myr) and a hiatus confined into the shallower water sector (ca 2 Myr); determining the mean eruption frequency of volcanoes (ca 9 kyr); and the time of inundation of the Western Interior Seaway (97.5 to 97.1 Ma). The context, the outcrops-cores-logs correlations, the large dataset (Supplemental Information), the high-precision and well-calibrated constraints represent an unprecedented contribution for future regional facies models of organic-rich units and for improvements of key aspects in the Industry of Unconventional resources.
Coverage:
Median Latitude: 29.462676 * Median Longitude: -101.161067 * South-bound Latitude: 29.230930 * West-bound Longitude: -103.011870 * North-bound Latitude: 30.259800 * East-bound Longitude: -97.757350
Size:
13 datasets

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Datasets listed in this publication series

  1. Minisini, D (2017): (Fig. 1-21) Chronostratigraphy of the organic-rich Eagle Ford Group. https://doi.org/10.1594/PANGAEA.878560
  2. Minisini, D (2017): (Table S1) Sampling positions. https://doi.org/10.1594/PANGAEA.878561
  3. Minisini, D (2017): (Table S2) Chronostratigraphic marker of the organic-rich Eagle Ford Group. https://doi.org/10.1594/PANGAEA.878862
  4. Minisini, D (2017): (Table S3) 25 chronostratographic markers of the organic-rich Eagle Ford Group. https://doi.org/10.1594/PANGAEA.878864
  5. Minisini, D (2017): (Table S4) Bulk mineralogy of organic-rich Eagle Ford Group, Shell_Iona-1. https://doi.org/10.1594/PANGAEA.878865
  6. Minisini, D (2017): (Table S5) Bulk mineralogy of organic-rich Eagle Ford Group, Schell_BB2. https://doi.org/10.1594/PANGAEA.878867
  7. Minisini, D (2017): (Table S6) Bentonites of organic-rich Eagle Ford Group, Shell_Iona-1. https://doi.org/10.1594/PANGAEA.878871
  8. Minisini, D (2017): (Table S7) Zircon ages of organic-rich Eagle Ford Group, Shell_DR-13. https://doi.org/10.1594/PANGAEA.878873
  9. Minisini, D (2017): (Table S19) Geochemistry of organic-rich Eagle Ford Group, Shell_Innes-1. https://doi.org/10.1594/PANGAEA.883352
  10. Minisini, D (2017): (Table S19) Geochemistry of organic-rich Eagle Ford Group, Shell_Iona-1. https://doi.org/10.1594/PANGAEA.883353
  11. Minisini, D (2017): (Table S19) Total clay content of organic-rich Eagle Ford Group, Shell_Iona-1. https://doi.org/10.1594/PANGAEA.883355
  12. Minisini, D (2017): (Table for Figure S21) Isotopic ratios of organic-rich Eagle Ford Group, Schell_BB2. https://doi.org/10.1594/PANGAEA.884556
  13. Minisini, D (2017): (Table for Figure S21) TOC and CaCO3 content of organic-rich Eagle Ford Group, Schell_BB2. https://doi.org/10.1594/PANGAEA.884555