- Tytuł:
- Seismic and non-seismic soft-sediment deformation structures in the Proterozoic Bhander Limestone, central India
- Autorzy:
-
Sarkar, S.
Choudhuri, A.
Banerjee, S.
Van Loon, A. J.
Bose, P. K. - Powiązania:
- https://bibliotekanauki.pl/articles/94668.pdf
- Data publikacji:
- 2014
- Wydawca:
- Uniwersytet im. Adama Mickiewicza w Poznaniu
- Tematy:
-
seismites
soft-sediment deformation structures
basin subsidence
Proterozoic
India
sejsmity
struktury deformacji
osady miękkie
proterozoik
Indie - Opis:
- Numerous soft-sediment deformation structures occur within the Proterozoic Bhander Limestone of an intracratonic sag basin in a 750 m long section along the Thomas River, near Maihar, central India. Part of these deformation structures have most probably a non-seismic origin, but other structures are interpreted as resulting from earthquake-induced shocks. These seismic structures are concentrated in a 60 cm thick interval, which is interpreted as three stacked seismites. These three seismites are traceable over the entire length of the section. They divide the sedimentary succession in a lower part (including the seismites) deposited in a hypersaline lagoon, and an upper open-marine (shelf) part. Most of the soft-sediment deformations outside the seismite interval occur in a lagoonal intraclastic and muddy facies association. The SSDS within the seismite interval show a lateral continuity. They record simultaneous fluidisation and liquefaction. The bases of each of the three composing seismite bands are defined by small-scale shear folds, probably recording an earthquake and aftershocks. The presence of the three seismite bands at the boundary between the lagoonal and the overlying open-marine oolitic facies association suggests that the seismic event also triggered basin subsidence.
- Źródło:
-
Geologos; 2014, 20, 2; 89-103
1426-8981
2080-6574 - Pojawia się w:
- Geologos
- Dostawca treści:
- Biblioteka Nauki
Artykuł