Northern Iran: Alborz Mountains

Stöcklin, Jovan

doi:10.1144/gsl.sp.2005.004.01.12

Cited by 110 publications

(50 citation statements)

References 3 publications

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“…The geological studies of Iran has begun since decades ago containing [13][14][15][16][17][18][19][20][21][22][23][24][25]. Iran has one of the most complex economic geology settings in the world including several metallic and nonmetallic deposits.…”

Section: Geology Settingsmentioning

confidence: 99%

Geochemical Studies for Gold in Alut Anomaly District

Agharezaei¹,

Hezarkhani²

2017

IJSEA

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Abstract:The target in this research is detecting Gold anomalies in Alut district. This area is located in western Iran. The area mostly consists of metamorphic rocks extended along geological structures. Geochemical anomaly detection for gold begins with sampling in the study area. The samples are obtained from drainages of the area thus the samples are surface soil specimens. These samples are analyzed by ICP-MS. Then statistical and non-statistical methods are applied to define anomalies in the area. Finally anomaly maps are generated.

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Section: Geology Settingsmentioning

confidence: 99%

Geochemical Studies for Gold in Alut Anomaly District

Agharezaei¹,

Hezarkhani²

2017

IJSEA

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“…Central Iran as a part of the Central-East Iran seismotectonic province is located in the south of the Alborz and forms a range-and-basin system with a lower altitude than the Alborz, with active mountain-bordering thrust and some long strike-slip faults (JICA and CEST, 2000). Central Iran has much in common with Alborz in its structure and history; thus the sedimentary record is so similar in the two regions that many rock-unit names of Paleozoic, Mesozoic and Tertiary formations can be applied in both the Alborz and a large part of Central Iran (Stocklin, 1974). In addition, both regions were folded and faulted with similar intensity by the Alpine diastrophism in Tertiary time (Stocklin, 1974;Mirzaei et al, 1998).…”

Section: Tectonic Settingmentioning

confidence: 99%

“…Central Iran has much in common with Alborz in its structure and history; thus the sedimentary record is so similar in the two regions that many rock-unit names of Paleozoic, Mesozoic and Tertiary formations can be applied in both the Alborz and a large part of Central Iran (Stocklin, 1974). In addition, both regions were folded and faulted with similar intensity by the Alpine diastrophism in Tertiary time (Stocklin, 1974;Mirzaei et al, 1998). The north part of Central Iran in the vicinity of the Alborz approximately follows the trend of the Alborz and shows strong tectonic activity with surface deformation during both historic and present time.…”

Section: Tectonic Settingmentioning

confidence: 99%

Ground-motion scenarios consistent with PSH deaggregation for Tehran, capital city of Iran

Abdi

Mirzaei

Shabani

2013

Nat. Hazards Earth Syst. Sci.

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This study presents the results of probabilistic seismic hazard (PSH) deaggregation for 5%-damped 0.2 and 1.0 s spectral accelerations, corresponding to mean return periods (MRPs) of 50, and 475 yr for Tehran city. The aim of this paper is to quantify the dominant events that have the most contribution on ground-motion exceedance from the above mentioned hazard levels. The scenario earthquakes are characterized by bins of magnitude (M), source-to-site distance (R), and epsilon (ε). The results reveal that for Tehran city, the hazard is mainly controlled by local seismicity. Generally, as the spectral acceleration period increase, the contribution of larger and more distant scenario earthquakes to the overall seismic hazard increase

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“…However, in the northern section of the Alborz, Middle Jurassic to Upper Cretaceous limestone formations become much more important and form some very high rock cliffs along the east-west directed thrust fault zones (Stöcklin 1974).…”

Section: Study Areamentioning

confidence: 99%

Relationships between environmental variables and vegetation across mountain wetland sites, N. Iran

et al. 2010

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Abstract:The mountain wetlands studied represent a unique habitat on the southern slopes of the Alborz mountain range, the second largest range in Iran. In comparison with other parts of this range the western section is ecologically and botanically unknown. Floristic and vegetation variation were assessed using diverse environmental variables along a broad altitudinal span (350 m to 3200 m a.s.l.). Using both statistical and ordination analyses floristic variation was assessed on three defined altitudinal belts which were delimited based on Alborz macro-climatic boundaries. The distribution of individual wetland plant species, of phytogeographic elements and of life-forms all differ among altitudinal belts. This result is also shown in both direct and indirect analyses of ordinations. The proportion of geophytes significantly increases with altitude and geophytes are very well represented in the upper altitudinal belt. The number of species of a narrow phytogeographical distribution (e.g. endemics) increases with altitude, soil pH and EC declined with altitude. The first axis of DCA ordination with passively projected environmental variables indicates that, organic matter and concentration of Fe 2+ are increased toward higher altitude. The second axis of ordination is related to both soil texture and slope inclination. The distribution of species in the CCA species plot is also close to the distribution of those in the DCA ordination. This study indicates that altitude and slope together with other dependent environmental variables (pH, EC, Ca 2+ and soil texture) are the main ecological factors controlling species distribution across the Western Alborz wetland sites.

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Northern Iran: Alborz Mountains

Cited by 110 publications

References 3 publications

Geochemical Studies for Gold in Alut Anomaly District

Geochemical Studies for Gold in Alut Anomaly District

Ground-motion scenarios consistent with PSH deaggregation for Tehran, capital city of Iran

Relationships between environmental variables and vegetation across mountain wetland sites, N. Iran

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