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Title: Understanding the Big Hill Dome Surface Uplift: historical InSAR Study.


Abstract not provided.

; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE), Petroleum Reserves (FE-40)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Solution Mining Research Institute Fall Conference 2015 held September 27-30, 2015 in Santander, Spain.
Country of Publication:
United States

Citation Formats

Lord, Anna C. Snider, Sobolik, Steven R., Roberts, Barry L, Harry McCormack, and Hayley Larkin. Understanding the Big Hill Dome Surface Uplift: historical InSAR Study.. United States: N. p., 2015. Web.
Lord, Anna C. Snider, Sobolik, Steven R., Roberts, Barry L, Harry McCormack, & Hayley Larkin. Understanding the Big Hill Dome Surface Uplift: historical InSAR Study.. United States.
Lord, Anna C. Snider, Sobolik, Steven R., Roberts, Barry L, Harry McCormack, and Hayley Larkin. 2015. "Understanding the Big Hill Dome Surface Uplift: historical InSAR Study.". United States. doi:.
title = {Understanding the Big Hill Dome Surface Uplift: historical InSAR Study.},
author = {Lord, Anna C. Snider and Sobolik, Steven R. and Roberts, Barry L and Harry McCormack and Hayley Larkin},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2015,
month = 9

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  • In recent years, there has been increased interest in balancing and restoring cross sections of deformed strata above mobilized salt. Doing this correctly requires a thorough understanding of the movement of the salt as well as the deformation styles of strata to be restored. The effects of the style of salt movement on the appearance of the cross section can be illustrated by the use of idealized geometric models. In the case of cross sections drawn perpendicular to a highly elongate salt dome (salt wall), a two-dimensional model is adequate; however, for cross sections drawn through the crest of amore » hemispherical dome, a three-dimensional model is needed. Mathematical relationships between salt dome uplift and withdrawal basin subsidence, and between the cross-sectional areas of the salt dome and the withdrawal basin, differ between the two cases. For the highly elongate dome, the dome and basin areas are equal and basin subsidence ranges from 15% to 50% of the dome uplift, depending on the height of the dome. For the hemispherical dome, the basin area in cross section is only 10% to 33% of the dome area, due to motion of the salt into the plane of the cross-section from outside. In addition, the basin subsidence for a hemispherical dome ranges from 2% to 17% of the dome uplift, depending on the height of the dome. The sensitivity of area relationships in cross section to the style of salt movement occurring during the formation of a dome can lead to large errors in estimates of the amount of salt lost to extrusion or dissolution if the style of salt movement is estimated incorrectly. In addition, the equations can also be applied to basins of clastic sediment developed over thick beds of salt, and may explain the common observation that restored cross sections of these basins often contain more salt than the present-day cross section.« less
  • Evidence of former deep burial of Ordovician to Devonian strata of the Ozark dome and northern Appalachians has been obtained from petrographic and geochemical studies of carbonates and coal-bearing rocks. In diagenetic minerals of the carbonate rocks, fluid inclusion homogenization temperatures and delta/sup 18/O values indicate paleotemperatures of 100 to 200/sup 0/C. The geothermometers used also include vitrinite reflectance, level of organic metamorphism (LOM), Staplin kerogen alteration index, and conodont alteration index (CAI). Maximum depths of burial were calculated from the estimated paleotemperatures assuming a geothermal gradient of about 25/sup 0/C/km. Strata of the Silurian of the northern Appalachian basinmore » and of the Ordovician of the Ozark dome are interpreted to have reached maximum burial depths of 5 and 4.3 km, respectively; Devonian strata in the Catskill Mountains of New York had former burial depths of about 6.5 km; Lower Ordovician carbonate sequences of the northern Appalachian basin were buried to more than 7 km; Middle Ordovician strata from the same basin had paleodepths of approximately 5 km, and Devonian strata, 4.5 to 5 km. If these strata were formerly buried much more deeply than previously thought, then unexpectedly large amounts of uplift and erosion, ranging from 4.3 to 7 km, must also have occurred to bring these strata to the present land surface. The occurrence of such large-scale vertical movements of the crust and lithosphere needs to be recognized in paleogeographic reconstructions.« less
  • According to previous interpretations the Acadian Hill fold (Thompson, Ph.D. thesis 1950) is a major, 20 km long, north-plunging synformal digitation containing inverted Middle Proterozoic gneiss and cover rocks along the western flank of the Chester dome. It constitutes the principal evidence for inversion of rocks in the nappe model of the Chester dome. Reexamination of the southern closure reveals that it does not close in a north plunging synform but the contact between cover rock and Middle Proterozoic gneiss dips southwest and west in a series of well-exposed minor folds. Steeply plunging folds in the cover rocks are themore » result of Acadian refolding of the earlier steeply dipping Taconian schistosity, that passes through vertical on the nose of the fold. The hingelines of the Acadian folds are highly irregular, but commonly plunge at 60 to 90 degrees within the subvertical and west dipping Acadian axial surfaces. Rather than supporting northerly dips and subhorizontal axial surfaces, plunges of hingelines of interference folds and of intersection lineations indicate folding of steeply-dipping schistosity and contacts. The data therefore do not support the existence of subhorizontal recumbent folds prior to development of the Butternut Hill fold. Projections showing the Butternut Hill fold as a downward closing synformal S shaped'' digitation of Middle Proterozoic core gneisses and cover rocks are not supported by the data presented here, as it is Z shaped in profile and upward closing. In the present interpretation, the Butternut Hill fold is a simple antiformal structure, possibly developed on a pre-existing (Taconian) reclined fold, that originally plunged steeply southeast in the regional (Taconian) schistosity. These observations suggest that a reevaluation of the Acadian nappe model for the Chester and Athens domes is necessary.« less