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Viscosity estimates of salt in the Hormuz and Namakdan salt diapirs, Persian Gulf

Soumyajit Mukherjee, Christopher J. Talbot and Hemin A. Koyi
Viscosity estimates of salt in the Hormuz and Namakdan salt diapirs, Persian Gulf
Geological Magazine (July 2010) 147 (4): 497-507


The parabolic surface profiles of the Hormuz and Namakdan salt diapirs in the Persian Gulf suggest that they have been extruding with Newtonian viscous rheologies for the last 10 (super 4) years. We derive velocity profiles for these diapirs, neglecting gravitational spreading and erosion/dissolution while assuming incompressible Newtonian rheology of the salt. Fitting known rates of extrusion at specific points in its elliptical cross-section, the dynamic viscosity of the salt of the Hormuz diapir is found to range between 10 (super 18) and 10 (super 21) Pa s. Approximating its sub-circular cross-section to a perfect circle, the range of viscosity of the salt of the Namakdan diapir is obtained as 10 (super 17) -10 (super 21) Pa s. These calculated viscosities fall within the range for naturally flowing salts elsewhere and for other salt diapirs but are broader than those for salts with Newtonian rheology deforming at room temperatures. The salts of the Hormuz and Namakdan diapirs are expected to exhibit a broader range of grain size, which matches the limited existing data.

ISSN: 0016-7568
EISSN: 1469-5081
Coden: GEMGA4
Serial Title: Geological Magazine
Serial Volume: 147
Serial Issue: 4
Title: Viscosity estimates of salt in the Hormuz and Namakdan salt diapirs, Persian Gulf
Affiliation: Indian Institute of Technology Bombay, Department of Earth Sciences, Powai, India
Pages: 497-507
Published: 201007
Text Language: English
Publisher: Cambridge University Press, London, United Kingdom
References: 71
Accession Number: 2010-057983
Categories: Structural geologySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendices
Illustration Description: illus. incl. 3 tables, sketch map
N26°30'00" - N27°10'00", E55°15'00" - E56°30'00"
Secondary Affiliation: Uppsala University, SWE, Sweden
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Cambridge University Press. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201031
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