ELASTIC DIURNAL MOVEMENTS OF MASSES OF TERTIARY SALT EXTRUDED IN NORTH CENTRAL IRAN

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SAFAEI H.

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Journal Paper

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Journal: Journal of Sciences, Islamic Republic of Iran Year:2001 | Volume:12 | Issue:3 Page(s): 241-250

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Information Journal Paper

Title

ELASTIC DIURNAL MOVEMENTS OF MASSES OF TERTIARY SALT EXTRUDED IN NORTH CENTRAL IRAN

Author(s)

SAFAEI H. | Issue Writer Certificate

Keywords

MARKER MOVEMENTS; THERMAL STRAINS; TIDAL FORCES; EXTRUSIVE SALT; CENTRAL IRANQ4

Abstract

Metal markers were installed along three traverses onto two masses of late Eocene – early Oligocene salt extruded along 2 major faults near Garmsar in Central Iran. Each marker consisted of a 30×30×1 cm steel plate with its four corners securely anchored into the salt by steel bars 50 cm long. An accurate survey method measured the horizontal and vertical distances of particular markers relative to fixed baselines at time intervals between 15 to 60 min. during particular days in 1997. Surface shade temperature was measured at the baseline at the same time intervals. The main results are: 1– Markers moved irregularly between a few centimeters and 7 m each day but their return each evening close to where they began each morning indicates that diurnal strains in the salt were essentially elastic. 2– Horizontal and vertical movements of markers were strongly related to each other and to their distances and heights relative to the baseline. 3– Translating markers movements to salt strains found horizontal strains to relate with their distance from the baseline whereas vertical strains are close to constant regardless of the thickness of salt beneath them. 4– Salt movements measured over hours can be modeled as thermal expansions induced by temperature rise close to those measured. Salt movements measured over longer intervals are modeled by thermal expansions due to temperature rises much smaller than measured. 5– On some days when tidal forces opposed temperature changes, irregular marker movements matched smooth changes in tidal forces at least as well as changes in surface temperature. It is therefore suggested that lunar and solar gravitation affects the movements of extruded salt masses.

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APA: Copy

SAFAEI, H.. (2001). ELASTIC DIURNAL MOVEMENTS OF MASSES OF TERTIARY SALT EXTRUDED IN NORTH CENTRAL IRAN. JOURNAL OF SCIENCES ISLAMIC REPUBLIC OF IRAN, 12(3), 241-250. SID. https://sid.ir/paper/372283/en

Vancouver: Copy

SAFAEI H.. ELASTIC DIURNAL MOVEMENTS OF MASSES OF TERTIARY SALT EXTRUDED IN NORTH CENTRAL IRAN. JOURNAL OF SCIENCES ISLAMIC REPUBLIC OF IRAN[Internet]. 2001;12(3):241-250. Available from: https://sid.ir/paper/372283/en

IEEE: Copy

H. SAFAEI, “ELASTIC DIURNAL MOVEMENTS OF MASSES OF TERTIARY SALT EXTRUDED IN NORTH CENTRAL IRAN,” JOURNAL OF SCIENCES ISLAMIC REPUBLIC OF IRAN, vol. 12, no. 3, pp. 241–250, 2001, [Online]. Available: https://sid.ir/paper/372283/en

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