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Study on Saravan Fault Activities on the Basis of Earthquake and Morphotectonics Evidences

Open Journal of Geology 2016年第2期6卷 79-86页

作者： Shahram Habibi Mood Mohsen Jami javad shahraki Nazanin Sarhaddi Department of Geology College of Basic Science Zahedan Branch Islamic Azad University Zahedan Iran

Saravan Fault is the biggest fault in southeast of Iran. It is Right-Slip fault. It has been extended from northwest to southeast. It is important to evaluate tectonic activities along this fault because it is adjacent to the city and various villages. It’s found that there are various tectonic activities along this fault. In this paper, it has been studied on affecting this fault on geomorphology of the zone. Average values of some indices such as Mountain Font Sinuosity and V ratio have been studied that they are 1.76 and 0.77, respectively. It suggests that there are serious tectonic activities in the zone. There are some evidences such as Right-Slip fault along artificial river channel that indicates its youngest stage means Late Cenozoic. According to studies, Saravan Fault is more active in the middle zone than northwest and southeast ends.

关键词： Saravan Fault Earthquake Morphotectonic Geomorphologic Dextral Strike-Slip

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Facies Analysis, Depositional Environment of the Lower Permian Deposits of Chili Formation in Kalmard Block, Eastern Central Iran (Darin Section)

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Open Journal of Geology 2015年第8期5卷 539-551页

作者： javad shahraki Mohammad javad Javdan Seyed Mahmood Pahlavan Hashemi Mohsen Jami Mahdiyeh Nastooh Seyed Mohammad Kalvandi Department of Geology Zahedan Branch Islamic Azad University Zahedan Iran

Early Permian deposits in north of Kalmard region recognize with formal group of Khan;they have various features in the different place. This group includes four different formations from lower to the upper part: Chili, Sartakht and Hermez. These formations consist of carbonate rocks. Chili Formation has 104 m, thickness in Darin section and consists of limestone with intermediates of shale and marland sandstone. Lower boundary of this formation is disconformable with Gachal formation. The upper boundary is separated by unconformity from the upper part Sartakht formation according to the lithological characters and microscopic studies, cause identifications of beach, intertidal, open and semi-restricted lagoon, shoals and bar and open marine sub-environ- ments for the Chili Formation. Vertical changes of microfacies and depth changes curve show much more thickness of shoals and bar microfacies, and little thickness of open and semi-re- stricted lagoon and open marine microfacies. Deposits of Chili Formation in Darin section deposited in the gentle gradient Homoclinal ramp in the south of Paleotethys Ocean. Two depositional sequences have been identified in this formation, based on recognized Fusulinid, show age of Sakmarian, which has adaptation with Lower Absaroka III.

关键词： Kalmard Area Chili Formation Depositional Environment Darinsection Paleotethys Sartakht Gachal

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Facies Analysis, Sedimentary Environment and Sequence Stratigraphy of the Carboniferous Deposits of Gachal Formation, Eastern Central Iran (Rahdar Section)

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Open Journal of Geology 2015年第9期5卷 623-636页

作者： Mohammad javad Javdan Mohammad Nabi Gorgij javad shahraki Seyed Mahmood Pahlavan Hashemi Seyed Mohsen Kalvandi Seyed Mohammad Kalvandi Eshagh Bandani Department of Geology Ferdowsi University Mashhad Iran Department of Geology Siatan and Baluchestan University Zahedan Iran Department of Geology Zahedan Branch Islamic Azad University Zahedan Iran

Early carboniferous deposits of the Kalmard block, with various characteristics in different outcrops, are recognized by Gachal Formation. Generally speaking, this formation comprises of four different members (A, B, C and D), consisting of carbonate and evaporative rocks. Gachal Formation is composed chiefly of 55 meters sandstone and limestone interbedded with shale. According to the lithological and microscopic studies, Gachal Formation is deposited in beach, semi-restricted and open lagoon, shoal and open marine environments. Vertical changes of microfacies and the curve of its depth changes account for the high thickness of the facies of shoal and bar sub-environments and the low thickness of the facies of lagoon and open marine sub-environment as well. Gachal Formation rocks in Rahdar section are deposited in a low-angle?homoclinal ramp?located in southern Paleothysis Ocean. The carbonate-sandstone sequence in?Gachal Formation in Rahdar section is composed of a depositional sequence separated from each other by type 1 sequence boundaries. Deposits of this formation are separated from lower deposits by type 2 sequence boundary and from?Khan Group by unconformity. The sedimentary sequence identified in this formation points to the age of late Visean, conforming to Kaskaskia IV. The erosional boundary between Gachal and Khan Formations is relatively compatible with drop in sea level at Late Kaskaskia global scale.

关键词： Kalmard Lower Carboniferous Gachal Formation Rahdar Section Homoclinal Paleothysis Kaskaskia Khan Group

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