... latest Oligocene (23.5–22.5 Ma) quartz monzonites and granites from the western segment of the Urumieh–Dokhtar magmatic belt in Iran, which are likely to have formed in response to the early stages of Arabia–Eurasia collision. The studied rocks have the geochemical characteristics of typical adakites...

.... There is a pegmatitic vein within the Hamadan garnet (± andalusite ± staurolite) schist adjacent to the Alvand Plutonic Complex (APC), south of Hamedan city (western Iran), in which large crystals of gem spodumene occur together with quartz, amazonite, beryl, tourmaline, and apatite. This spodumene-bearing pegmatite...

... and environmental science. The aim of the study reported here was to investigate variations in the magnetic susceptibility (χ) of soils in western Iran due to differences in lithology and to examine the relationship of χ to ferrimagnetic minerals. Eighty samples were collected from eight parent materials taken from...

...Reza Deevsalar; Ryuichi Shinjo; Kuo-Lung Wang; Yeganehfar Hadi; Iain Neill Abstract The Sanandaj–Sirjan Zone (SaSiZ) is a magmatic terrane within the Zagros Orogen, western Iran, marking the Tethyan suture zone between the Afro-Arabian Plate and the Central Iran Micro-Continent. Mafic–intermediate...

...FATEMEH NOURI; YOSHIHIRO ASAHARA; HOSSEIN AZIZI; MOTOHIRO TSUBOI Abstract The Harsin–Sahneh serpentinized peridotites are widely exposed along the Zagros suture zone in the western region of Iran and are considered to represent remnants of Neo-Tethys oceanic lithosphere at the junction...

...Gholamreza Khanlari; Mojtaba Heidari; Ali Akbar Momeni; Mohammad Ahmadi; Alireza Taleb Beydokhti Abstract The main objective of this study was to evaluate the relationship between the declining groundwater level and land subsidence and sinkhole collapse in the Hamedan central plain, western Iran...

...D. Esmaeily; S.Z. Afshooni; H. Mirnejad; N. Rashidnejad-e-Omran Abstract The Astaneh pluton, located southwest of Arak city in western Iran, consists of Middle Jurassic granitoids and is widely affected by hydrothermal alteration. Phyllic (sericitic), argillic, chloritic, and propylitic alteration...

...Dariush Esmaeily; Robert B. Trumbull; Mastaneh Haghnazar; Marc-Sebastian Krienitz; Michael Wiedenbeck Abstract The Jurassic Boroujerd Granitoid Complex in western Iran mainly consists of quartz diorite, granodiorite and monzogranite, which are intrusive into Jurassic phyllites and mica schists...

...Elham Shabani; Noorbakhsh Mirzaei Seismic hazard assessment and zoning of the Kermanshah-Sanandaj region in western Iran is conducted using probabilistic approach. Two maps have been prepared to indicate the earthquake hazard of the region in the form of iso-acceleration contour lines. They display...

... event during extensional tectonics between 55.7 and 38.5 Ma at Muteh might be the direct expression of the regional thermal and tectonic modifications and fluid input resulting from slab breakoff beneath the Sanandaj-Sirjan zone. Gold ore formation at Muteh in Western Iran is early to middle...

...VICTOR B. CHERVEN Abstract Five sedimentary basins formed along the Iranian margin of the southern Tethys Ocean during its evolution. These basins record the opening and closing of the ocean basin and the collision of what is now Arabia and Iran. The late Paleozoic–Jurassic Isfahan basin opened...

... TO THE EDITOR A STATISTICAL STUDY OF THE AMPLITUDE DISTRIBUTION OF AN EARTHQUAKE SWARM IN WESTERN IRAN BY A. A. 1SLAMI A swarm of earthquakes occurred in the small area between Mehran and Dehloran in the western b o r d e r o f l r a n (33.0 ° 4- 0.1°N, 46.2 ° + 0.1°E) beginning on M a y 29, 1972 and continuing...

...E. C. Dapples Abstract "Surficial sediments from Syria, Trans-Jordan, Iraq, and western Iran may be classified into residual deposits, sheet-wash deposits, residual deposits transported by running water and wind, evaporite deposits, playa lake deposits, and eolian deposits. Residual deposits...