FE |
Massive metapelite |
Massive metapelite with thickness ranges from 0.08 to 3.20 m, which occurs in all extension of the studied successions |
Precipitation from suspension turbidite flow and low-density turbidity currents (Lowe 1982Lowe D.R. 1982. Sediment gravity flows: II Depositional models with special reference to the deposits of high-density turbidity currents. Journal of Sedimentary Research, 52:279-297. https://doi.org/10.1306/212F7F31-2B24-11D7-8648000102C1865D
https://doi.org/10.1306/212F7F31-2B24-11...
, Mutti 1992Mutti E. 1992. Turbidite sandstones. Parma, Agip, Instituto di Geologia, Università di Parma, 275 p., Mulder et al. 2003Mulder T, Syvitski J, Migeon S, Faugères J. C, Savoye B. 2003. Marine hyperpycnal flows: Initiation, behavior and related deposits. A review. Marine and Petroleum Geology, 20(6-8):861-882. https://doi.org/10.1016/j.marpetgeo.2003.01.003
https://doi.org/10.1016/j.marpetgeo.2003...
, Zavala et al. 2011Zavala C., Arcuri M., Gamero H., Contreras C., Di Meglio M. 2011. A genetic facies tract for the analysis of sustained hyperpycnal flow deposits. In: Slatt R.M., Zavala C. (eds.), Sediment Transfer from Shelf to Deep Water: Revisiting the Delivery System. American Association of Petroleum Geologists, Studies in Geology, 61, p. 31-51. https://doi.org/10.1306/13271349St613438
https://doi.org/10.1306/13271349St613438...
, Zavala & Arcuri 2016Zavala C. & Arcuri M. 2016. Intrabasinal and extrabasinalturbidites: Origin and distinctive characteristics. Sedimentary Geology, 337:36-54.). The facies is based on the F9 of Mutti (1992Mutti E. 1992. Turbidite sandstones. Parma, Agip, Instituto di Geologia, Università di Parma, 275 p.) and Mutti et al. (2003Mutti E., Tinterri R., Benevelli G., di Biase D., Cavanna G. 2003. Deltaic, mixed and turbidite sedimentation of ancient foreland basins. Marine and Petroleum Geology, 20(6-8):733-755. https://doi.org/10.1016/j.marpetgeo.2003.09.001
https://doi.org/10.1016/j.marpetgeo.2003...
) |
FD |
Massive metasandstone |
Fine-grained metasandstone from 0.2 to 18 m mostly described in the upper portion of Cercadinho Formation sections and always associated with the FC facies |
Low-density turbidity currents (Lowe 1982Lowe D.R. 1982. Sediment gravity flows: II Depositional models with special reference to the deposits of high-density turbidity currents. Journal of Sedimentary Research, 52:279-297. https://doi.org/10.1306/212F7F31-2B24-11D7-8648000102C1865D
https://doi.org/10.1306/212F7F31-2B24-11...
). The facies is based on the F8 of Mutti et al. (2003Mutti E., Tinterri R., Benevelli G., di Biase D., Cavanna G. 2003. Deltaic, mixed and turbidite sedimentation of ancient foreland basins. Marine and Petroleum Geology, 20(6-8):733-755. https://doi.org/10.1016/j.marpetgeo.2003.09.001
https://doi.org/10.1016/j.marpetgeo.2003...
) |
FC |
Laminated metasandstone |
Medium-grained laminated metasandstone with locally massive texture. The thickness ranges from 0.5 to 3.0 m |
Low-density turbidity currents (Lowe 1982Lowe D.R. 1982. Sediment gravity flows: II Depositional models with special reference to the deposits of high-density turbidity currents. Journal of Sedimentary Research, 52:279-297. https://doi.org/10.1306/212F7F31-2B24-11D7-8648000102C1865D
https://doi.org/10.1306/212F7F31-2B24-11...
). The facies is based on the F8 of Mutti et al. (2003Mutti E., Tinterri R., Benevelli G., di Biase D., Cavanna G. 2003. Deltaic, mixed and turbidite sedimentation of ancient foreland basins. Marine and Petroleum Geology, 20(6-8):733-755. https://doi.org/10.1016/j.marpetgeo.2003.09.001
https://doi.org/10.1016/j.marpetgeo.2003...
) |
FB |
Massive metasandstone |
Poorly sorted, coarse-grained metasandstone beds with subordinate interbedded muddy-rich lenses, which are well characterized at the base of the studied strata. Their thickness range from 0.15 to 2.0 m |
High- to low-density turbidity currents (Lowe 1982Lowe D.R. 1982. Sediment gravity flows: II Depositional models with special reference to the deposits of high-density turbidity currents. Journal of Sedimentary Research, 52:279-297. https://doi.org/10.1306/212F7F31-2B24-11D7-8648000102C1865D
https://doi.org/10.1306/212F7F31-2B24-11...
, Mutti 1992Mutti E. 1992. Turbidite sandstones. Parma, Agip, Instituto di Geologia, Università di Parma, 275 p.). The facies is based on the F7 of Mutti et al. (2003Mutti E., Tinterri R., Benevelli G., di Biase D., Cavanna G. 2003. Deltaic, mixed and turbidite sedimentation of ancient foreland basins. Marine and Petroleum Geology, 20(6-8):733-755. https://doi.org/10.1016/j.marpetgeo.2003.09.001
https://doi.org/10.1016/j.marpetgeo.2003...
) |
FA |
Pebbly metasandstone |
Metasandstone bodies from 2.0 to 5.0 m with angular to sub-rounded quartz pebbles. This facies is exclusive of Sabará Group |
High-density turbidity currents (Lowe 1982Lowe D.R. 1982. Sediment gravity flows: II Depositional models with special reference to the deposits of high-density turbidity currents. Journal of Sedimentary Research, 52:279-297. https://doi.org/10.1306/212F7F31-2B24-11D7-8648000102C1865D
https://doi.org/10.1306/212F7F31-2B24-11...
, Mutti 1992Mutti E. 1992. Turbidite sandstones. Parma, Agip, Instituto di Geologia, Università di Parma, 275 p., Stow & Johansson 2000Stow D.A.V. & Johansson M. 2000. Deep-water massive sands: nature, origin and hydrocarbon implications. Marine and Petroleum Geology, 17(2):145-174. http://dx.doi.org/10.1016/S0264-8172(99)00051-3
http://dx.doi.org/10.1016/S0264-8172(99)...
, Bass 2004Bass J.H. 2004. Conditions for formation of massive turbiditic sandstones by primary depositional processes. Sedimentary Geology, 166(3-4):293-310. https://doi.org/10.1016/j.sedgeo.2004.01.011
https://doi.org/10.1016/j.sedgeo.2004.01...
) |