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Systematics of the Fahrej calut ostracods in the southeast of Kerman and investigation of the paleomarine environmental conditions
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Marziyeh Notghi Moghaddam    , Bita Mostafavi |
| Payame Noor University , m.n.moghaddam@gmail.com |
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Abstract: (120 Views) |
Background and Objectives: The wide desert of the Lut is located in the central part of the Iran and including various geological phenomena such as the Lut plain, the hottest part of the earth, the largest Kaluts, the widest sand dunes and the highest nebkas and etc. Fahrej Kaluts is one of the most beautiful natural phenomena that attract the attention of every viewer. So far, no paleontological studies and age determination have been performed on Kaluts and there is not any report concerning this subject. The only reported age (Holocene) was performed based on the 1: 100,000 geological map of Normashir .In this study, the Kaluts of the Fahrej located in southeast of the Kerman city were investigated for determination of ostracods systematic and paleoecological studies.
Methods: After preliminary examination and field studies, the mentioned Kaluts were selected and sampled. In order to study the ostracods of Fahrej Kaluts, 12 samples of Kaluts with a height of 180 cm, taken from a depth of approximately 30 to 50 cm and were prepared as follows. Collected samples were transferred to the laboratory in 24 hours in a container containing water and oxygenated water (10 cc of 15% oxygenated water per liter of water). The samples washed with 30 and 60 mesh sieves. Then all the ostracods in each sample were removed with a picking brush and placed on a slide to be studied under a microscope. After the study, the selected species were imaged by scanning electron microscopy (SEM).
Findings: In this study, 21 species belonging to 15 genera of ostracods were identified. Ostracod fauna of the studied Kalut in the central Iran have low to medium diversity compared to other sedimentary basins and most species have low abundance. But according to the presence and bioevents of ostracod species, the paleoecological conditions were investigated.
Conclusion: The present of index ostracods in the studied samples give us very usefull data about paleoecological conditions. The present of warm water indicators (Cytherella and Cytherelloidea) and absent of cool water indicators suggest warm surface water conditions in these area. In this investigation, based on Xestoleberis an high oxygen condition were suggested and according to the present of Cytherelloidea the studied area was deposited in shallow marine environment in relatively low latitude.
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| Keywords: Systematic Paleomarine environmental Ostracod Fahrej calut Kerman |
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Type of Study: Research/ Original/ Regular Article |
Subject:
Marine Geology
Received: 2024/06/12 | Revised: 2024/07/26 | Accepted: 2024/07/26
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