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Deciphering oblique shortening of central Alborz in Iran using geodetic data
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2004 (English)In: Earth and Planetary Science Letters, ISSN 0012-821X, Vol. 223, no 1-2, 177-185 p.Article in journal (Refereed) Published
Abstract [en]

The Alborz is a narrow (100 km) and elevated (3000 m) mountain belt which accommodates the differential motion between the Sanandaj–Sirjan zone in central Iran and the South Caspian basin. GPS measurements of 12 geodetic sites in Central Alborz between 2000 and 2002 allow to constrain the motion of the belt with respect to western Eurasia. One site velocity on the Caspian shoreline suggests that the South Caspian basin moves northwest at a rate of 6±2 mm/year with respect to western Eurasia. North–South shortening across the Alborz occurs at 5±2 mm/year. To the South, deformation seems to extend beyond the piedmont area, probably due to active thrusting on the Pishva fault. We also observe a left-lateral shear of the overall belt at a rate of 4±2 mm/year, consistent with the geological motion observed along E–W active strike-slip faults inside the belt (e.g., the Mosha fault).

Place, publisher, year, edition, pages
Elsevier, 2004. Vol. 223, no 1-2, 177-185 p.
Keyword [en]
Alborz, oblique collision, GPS, fault motion, seismic hazard
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-70422OAI: oai:DiVA.org:uu-70422DiVA: diva2:98333
Available from: 2005-04-22 Created: 2005-04-22 Last updated: 2013-09-10Bibliographically approved

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Nilforoushan, F

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