MICROFACIES AND DEPOSITIONAL ENVIRONMENT OF THE QOM FORMATION IN THE NATANZ AREA (KUH-E CHARKHEH)

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SEYRAFIAN A.; TORABI H.; SHOJAEI MOHAMMAD

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Paper Information

Journal: RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE" Year:2006 | Volume:23 | Issue:1 Page(s): 135-148

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Title

MICROFACIES AND DEPOSITIONAL ENVIRONMENT OF THE QOM FORMATION IN THE NATANZ AREA (KUH-E CHARKHEH)

Author(s)

SEYRAFIAN A. | TORABI H. | SHOJAEI MOHAMMAD | Issue Writer Certificate

Keywords

MICROFACIESQ3

QOM FORMATIONQ3

OLIGO-MIOCENEQ3

Abstract

The outcrops of the QOM FORMATION in the southeast of Natanz with 472 meters thickness compris interbedding of thick to thin bedded limestone, marl, calcareous sandstone and sandstone. It overlies the Eocene volcanic rocks with erosional contact of nonconformity and covers by alluvial deposits. Based on the occurrence of benthic foraminifera: Lepidocyclina (Eulepidina) elephantina, Lepidocyclina (Nephrolepidina) tournoueri, Austrotrillina howchini, Operculina complanata, Neo-rotalia viennoti and Amphistegina lesson, the Chattian-Aquitanian age is determined.10 MICROFACIES due to field work and microscopic analysis related to 4 depositional environments (open marine, bar, lagoon and tidal flat) were determined as follows: A- open marine MICROFACIES; la- lepidocyclinidae, coralinacea wackestone-packstone, Ib- numulitidae, lepidocyclinidae, coralinacea wackestone-packstone and 2- numulitidae, lepidocyclinidae packstone. B- bioclastic bar MICROFACIES; 3a- bioclastic grainstone, 3b- bioclastic packstone-graintone, 4- rotalidae, lepidocyclinidae grainstone and 5- rotalidae, amphisteginidae corallinacea packstone-grainstone. C- lagoon (restricted sea) MICROFACIES; 6a- bioclastic, miliolid packstone with quartz, 6b- bioclastic miliolid wackestone-packstone with quartz, 7- bioclastic, corallinacea wackestone-packstone and 8- alveolinidae, miliolidae corallinacea floatstone. D- tidal flat MICROFACIES; 9- bioclastic packstone- grainstonewithquartz, 10- volcanic arenite.This study reflects cyclic sedimentation due to sea level fluctuations. The sharp lithological change in 365 meters thickness, where lepidocyclinidae and nummulitidae MICROFACIES overlap by mainly quartz packstone-grainstone could reflect fast regression of the sea and suggest a sudden fall in sea level for deposition of the upper part of the QOM FORMATION.

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APA: Copy

SEYRAFIAN, A., TORABI, H., & SHOJAEI, MOHAMMAD. (2006). MICROFACIES AND DEPOSITIONAL ENVIRONMENT OF THE QOM FORMATION IN THE NATANZ AREA (KUH-E CHARKHEH). RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", 23(1), 135-148. SID. https://sid.ir/paper/404750/en

Vancouver: Copy

SEYRAFIAN A., TORABI H., SHOJAEI MOHAMMAD. MICROFACIES AND DEPOSITIONAL ENVIRONMENT OF THE QOM FORMATION IN THE NATANZ AREA (KUH-E CHARKHEH). RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE"[Internet]. 2006;23(1):135-148. Available from: https://sid.ir/paper/404750/en

IEEE: Copy

A. SEYRAFIAN, H. TORABI, and MOHAMMAD SHOJAEI, “MICROFACIES AND DEPOSITIONAL ENVIRONMENT OF THE QOM FORMATION IN THE NATANZ AREA (KUH-E CHARKHEH),” RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", vol. 23, no. 1, pp. 135–148, 2006, [Online]. Available: https://sid.ir/paper/404750/en

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