Salt Diapirs of the Great Kavir, Central Iran

Jackson, Martin P. A.; Cornelius, R. R.; Craig, Cecilia; Gansser, A.; Stöcklin, Jovan; Talbot, Christopher J.

doi:10.1130/mem177-p1

Cited by 157 publications

(152 citation statements)

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“…For salt layers with a thickness above 2 km, thermal convection has been suggested as a feasible mechanism for the internal deformation of the salt. For example, Jackson et al (1990) used linear stability analysis to study thermal convection within the salt of the Great Kavir region. (Jackson et al, 1990;their fig.…”

Section: Sensitiviry Of Results To Variability In Constitutive Paramementioning

confidence: 99%

“…For example, Jackson et al (1990) used linear stability analysis to study thermal convection within the salt of the Great Kavir region. (Jackson et al, 1990;their fig. 2.11, since most of the results published by Urai et al (1986) to which they refer, are consistent with the creep law of Spiers et al (1990, see fig.…”

Section: Sensitiviry Of Results To Variability In Constitutive Paramementioning

confidence: 99%

“…Only rarely might the overlying sediment be expected to deform mainly by viscous creep, e.g. in the Great Kavir in cen- tral Iran (Jackson et al, 1990). In that particular region, the elastic redbeds overlying the salt show a complete lack of diapir-related faulting, probably because of significant weakening and pervasive flow caused by disseminated halite.…”

Section: Model and Governing Equationsmentioning

confidence: 99%

“…The top frame of Figure lla shows the final stage of the postdepositional evolution as in Figure 10. In the syndepositional case the diapirs start evolving with less overburden than in the postdepositional case, which results in a smaller diapir spacing (Jackson et al, 1990). The syndepositional model with the larger grain size d = 3 cm (Fig.…”

Section: Syndepositional Diapirismmentioning

confidence: 99%

“…The gradient is estimated at 30 K/km for the Great Kavir region in central Iran (Jackson et al, 1990). We have varied the gradient between 25 and 35 K/km for two-layer models with 77sediment = lo*" Pa s and varying grain size.…”

Section: Effect Of Geothermal Gradientmentioning

confidence: 99%

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Section: Sensitiviry Of Results To Variability In Constitutive Paramementioning

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Rising and falling diapirs, shifting depocenters, and flap overturning in the Cretaceous Sopeira and Sant Gervàs subbasins (Ribagorça Basin, southern Pyrenees)

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et al. 2016

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The halokinetic structure of inverted salt‐related continental margins is frequently obliterated by compressional overprinting. The Cretaceous Sopeira and Sant Gervàs subbasins of the Ribagorça Basin (south central Pyrenees) show evidence of salt‐related extensional tectonics and diapiric growth along the Iberian Margin of the Mesozoic Pyrenean rift. We present an integrated field‐based tectonic‐sedimentary study to reconstruct the evolution of the Ribagorça Basin system previous to, and in the early stages of, the Pyrenean orogeny. The ~4 km thick Albian‐Cenomanian Sopeira minibasin infill thins toward the basin borders, especially toward the eastern, N‐S trending, Llastarri salt weld. The 90° tilt to the south of the Sopeira basin bottom records the growth of the buried north dipping Sopeira listric fault from Albian to Santonian times, when it evolved as an extensional rollover associated with the Aulet salt roller. The ~3 km thick Cenomanian‐Campanian succession filling the Sant Gervàs flap displays 130° bed fanning attitude from overturned Cenomanian carbonate platform strata to upright Campanian turbidite beds. The Sant Gervàs flap development since Cenomanian times was related to the fall of a large salt pillow after the main Soperia minibasin stage. Jurassic‐Campanian diachronous subsidence is also observed in the adjacent Montiberri, Faiada, and Tamurcia depocenters. Correlation with the Pedraforca, Cotiella, and Basque‐Cantabrian Basins along the southern Pyrenees suggests that a significant segment of the Iberian side of the Pyrenean rift experienced a gravity‐driven extension from Albian to late Santonian. The Ribagorça Basin provides an excellent field analogue for presently buried salt‐related structures of extended passive margins.

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The honeycomb terrain on the Hellas basin floor, Mars: A case for salt or ice diapirism

et al. 2016

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We present quantitative plausibility studies of potential formation mechanisms for the “honeycomb” terrain on the northwestern Hellas basin floor. The honeycomb terrain is a unique landscape of ~10.5 × 5 km wide, mostly cell‐shaped depressions that are arranged in a regular, dense pattern covering ~36,000 km2. We argue against the honeycombs being (peri)glacial landforms (till rings, iceberg imprints, and thermokarst) or the result of igneous diapirism, as terrestrial analogs do not reproduce their key characteristics. Fossilized impact melt convection cells also appear to be an unsuitable interpretation, as melt solidification should not permit such structures to be retained. We present arguments in favor of salt or ice diapirism as honeycomb formation models. Honeycomb‐sized diapirs could be formed by a ~2 km thick salt layer (~72,000 km3 for the entire honeycomb terrain), which might have been derived from the highlands north of Hellas Planitia—an area of abundant chloride signatures and intense snowfall according to ancient Mars climate models. Nearby volcanic activity ~3.8 Ga ago potentially enabled recurring phases of (probably salty) meltwater runoff (as indicated by meandering channels) and might therefore have enabled evaporite deposition in the Hellas basin. Being twice as buoyant as salt, water ice would require an only ~1 km thick layer (i.e., ~36,000 km3) to form honeycomb‐sized diapirs, which would be in agreement with a likely ~2 km thick ice stability zone beneath the Hellas basin floor. However, it would remain an open question as to why we find only one such ice diapir landscape on Mars.

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Salt Diapirs of the Great Kavir, Central Iran

Cited by 157 publications

References 0 publications

The effective viscosity of rocksalt: implementation of steady-state creep laws in numerical models of salt diapirism

The effective viscosity of rocksalt: implementation of steady-state creep laws in numerical models of salt diapirism

Rising and falling diapirs, shifting depocenters, and flap overturning in the Cretaceous Sopeira and Sant Gervàs subbasins (Ribagorça Basin, southern Pyrenees)

The honeycomb terrain on the Hellas basin floor, Mars: A case for salt or ice diapirism

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