scholarly journals Biostratigraphy of Baghamshah Formation based on calcareous nannofossils in the Southwest Tabas, Iran

2021 ◽  
Vol 24 (3) ◽  
pp. 165-178
Author(s):  
Azadeh Bordbar ◽  
Fatemeh Hadavi ◽  
Abbas Ghaderi ◽  
Marziyeh Notghi Moghaddam
Keyword(s):  
Central Iran ◽  
Calcareous Nannofossils ◽  
The West ◽  
Lithostratigraphic Unit ◽  
Lut Block ◽  
Sedimentary Cycle ◽  
Taxonomic Studies

The Tabas Block is part of the Central Iran microcontinent, located between the Lut Block in the East and the Yazd Block in the West. The Baghamshah Formation is the second lithostratigraphic unit from the sedimentary cycle of the Magu Group and the Baghamshah Subgroup in the Jurassic of Tabas Block. This formation is conformably underlaid with the grey pisoidal limestones of the Parvadeh Formation and overlaid with the Pectinid limestones of the Kamar-e-Mehdi Formation (Esfandiar Subgroup). In this research, the biostratigraphy of the Baghamshah Formation in the Rizu and Kamar-e-Mehdi sections, based on calcareous nannofossils, is examined. The thickness of the Baghamshah Formation in the Rizu section is 270 m (mostly including marl and green shales with intercalation of limestones and calcareous sandstones), and in the Kamar-e- Mehdi section is 236 m (composed of gypsiferous marly shales, marl, marly shales and alternation of marl-shale with limestones and calcareous sandstones). According to the taxonomic studies in the Rizu section, 52 species belong to 24 genera, and in the Kamar-e-Mehdi section, 45 species belong to 23 genera of calcareous nannofossils. Based on index calcareous nannofossils, the CC1, CC2, CC3, and CC4 biozones established by Sissinghh in both sections were determined. It is mentioned that CC5 biozone only occur in Kamar-e-Mehdi section. According to the identified biozones, the suggested age of the Baghamshah Formation is early Berriasian–early Hauterivian in the Rizu section, and early Berriasian–late Hauterivian in the Kamar-e-Mehdi section. Keywords: biostratigraphy, Baghamshah, calcareous nannofossils,Tabas, Iran.

scholarly journals Tectonic setting and geochronology of the Cadomian (Ediacaran-Cambrian) magmatism in Central Iran, Kuh-e-Sarhangi region (NW Lut Block)

2015 ◽  
Vol 102 ◽  
pp. 24-44 ◽  
Author(s):  
Federico Rossetti ◽  
Reza Nozaem ◽  
Federico Lucci ◽  
Gianluca Vignaroli ◽  
Axel Gerdes ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Central Iran ◽  
Lut Block

Mapping Quaternary faults in the west of Kavir Plain, north-central Iran, from satellite imageries

2010 ◽  
Vol 31 (19) ◽  
pp. 5111-5125 ◽  
Author(s):  
A. Babaahmadi ◽  
A. Yassaghi ◽  
A. Naeimi ◽  
GH. R. Dini ◽  
S. Taghipour
Keyword(s):  
Central Iran ◽  
The West ◽  
North Central

scholarly journals Petrology and Geochemistry of the Eocene Volcanic Rocks in the West of Sechangi, Lut Block

2019 ◽  
Vol 5 (1) ◽  
pp. 19-54
Author(s):  
Morteza Khalatbari Jafari ◽  
Zinat Kilani Jafari Sani ◽  
Jafar Omrani ◽  
◽  
◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
The West ◽  
Lut Block ◽  
Petrology And Geochemistry

scholarly journals Direct correlation of Tithonian/Berriasian boundary calpionellid and calcareous nannofossil events in the frame of magnetostratigraphy: new results from the West Balkan Mts, Bulgaria, and review of existing data

2017 ◽  
Vol 46 (2) ◽  
pp. 47-56
Author(s):  
Iskra Lakova ◽  
Jacek Grabowski ◽  
Kristalina Stoykova ◽  
Silviya Petrova ◽  
Daniela Reháková ◽  
...  
Keyword(s):  
Magnetic Polarity ◽  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
The West ◽  
Large Interval ◽  
History Museum ◽  
Specific Behaviour ◽  
Calcareous Nannofossil Biostratigraphy ◽  
Lower Berriasian ◽  
Events Data

Magnetostratigraphy, calpionellid and calcareous nannofossil biostratigraphy of the upper Tithonian and lower Berriasian of section Barlya in the West Balkan Mts are herein presented. The studied interval comprises the magnetozones from M21r to M17r, with a large interval of partial remagnetization. It has been directly correlated with a continuous succession of the calpionellid Chitinoidella, Praetintinnopsella, Crassicollaria and Calpionella zones, and with the nannofossil zones from NJT 15b to NK-1. The accumulated evidence in the last twenty years on the magnetostratigraphy, calpionellid and calcareous nannofossil biostratigraphy and events across the J/K boundary in the European Tethys has provoked the authors to plot the main micropalaeontological events against magnetostratigraphic column in order to assess the extent of diachronism of these events. Data from Slovakia, Poland, Italy, Austria, Hungary, France, Spain and Bulgaria has shown specific behaviour of different calpionellid and nannofossil events with respect to the column of the magnetic polarity chrons, which have been considered as ‘isochronous’ or at least less diachronous than the microfossil events. Thus, some rather consistent events have appeared, such as the first occurrences (FOs) of calpionellids Calpionella grandalpina, Crassicollaria brevis, Calpionella minuta and Remaniella ferasini, and the FOs of calcareous nannofossils Nannoconus globulus minor, Hexalithus geometricus, Nannoconus wintereri, Nannoconus steinmannii minor and Nannoconus kamptneri minor. The J/K boundary, as widely accepted, has been traced in section Barlya at the base of the Calpionella alpina Subzone.Financial support from the Synthesys Program at the National History Museum, Stockholm, is gratefully acknowledged.

The November 14 to December 25, 1979 Ghaenat earthquakes of northeast Iran and their tectonic implications

1980 ◽  
Vol 70 (5) ◽  
pp. 1751-1757
Author(s):  
A. Haghipour ◽  
M. Amidi
Keyword(s):  
Central Iran ◽  
Fault Rupture ◽  
Quaternary Deposits ◽  
Iranian Plateau ◽  
East Central ◽  
Lut Block ◽  
Shallow Earthquakes ◽  
Recent Earthquakes ◽  
Seismic Area ◽  
Northeast Iran

abstract A series of shallow earthquakes occurred in northeast Iran starting on November 14, 1979. The sequence includes two destructive earthquakes which occurred on November 14 and 27. In both cases, ground rupture developed along capable faults through the bedrock and Quaternary deposits. The November 14 earthquake was associated with a 20-km N-S trending right-lateral faulting. The November 27 earthquake accompanied a 60-km E-W trending left-lateral fault rupture. Also, during the second earthquake, the northern end of the earlier rupture continued northeastward to align with the eastern end of the second rupture. The result of the fault displacements of both earthquakes is relative subsidence with northeastward/eastward motion of the southwestern block. The earthquakes are located in the northeast corner of the Lut Block (an eastern fragment of central Iran) and included in the main structural zone of the Central Domain extended from Iran to Central Asia. The recent earthquakes are located in the highly seismic area of northeast Iran where the rate of seismicity has increased markedly in the past decade. Based on structural considerations of earthquake data, the rupture types their recent migration of locations show that a recent relative eastward motion for east-central Iran blocks resulted from northeast compressional movements and shortening of the Iranian Plateau.

Facies Analysis and Sequence Stratigraphy of the Qal'eh Dokhtar Formation (Middle-Upper Jurassic) in the West of Boshrouyeh, East Central Iran

2017 ◽  
Vol 91 (5) ◽  
pp. 1797-1819 ◽  
Author(s):  
Mahnaz SABBAGH BAJESTANI ◽  
Asadollah MAHBOUBI ◽  
Reza MOUSSAVI-HARAMI ◽  
Ihsan AL-AASM ◽  
Mehdi NADJAFI
Keyword(s):  
Sequence Stratigraphy ◽  
Facies Analysis ◽  
Upper Jurassic ◽  
Central Iran ◽  
The West ◽  
East Central

Post-Neogene right-lateral strike–slip tectonics at the north-western edge of the Lut Block (Kuh-e–Sarhangi Fault), Central Iran

2013 ◽  
Vol 589 ◽  
pp. 220-233 ◽  
Author(s):  
Reza Nozaem ◽  
Mohammad Mohajjel ◽  
Federico Rossetti ◽  
Marta Della Seta ◽  
Gianluca Vignaroli ◽  
...  
Keyword(s):  
Strike Slip ◽  
Central Iran ◽  
Lateral Strike Slip ◽  
The North ◽  
Lut Block ◽  
North Western
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