气候变化领域集成服务门户(CCPortal): Cyclostratigraphy of the Lower Triassic Kangan Formation in the Salman gas field; eastern Persian Gulf; Iran

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DOI	10.1016/j.palaeo.2020.110045
	Cyclostratigraphy of the Lower Triassic Kangan Formation in the Salman gas field; eastern Persian Gulf; Iran
	Falahatkhah O.; Kadkhodaie A.; Ciabeghodsi A.A.; Li M.
发表日期	2021
ISSN	0031-0182
卷号	561
英文摘要	Cyclostratigraphy plays a pivotal role in detecting and reporting Milankovitch cycles in sedimentary successions which allows for creating an independent astronomical time scale and estimates of sediment accumulation rates. In this study, cyclostratigraphic analysis of petrophysical logs from Lower Triassic Kangan Formation was performed in two wells of the Salman gas field, eastern part of the Persian Gulf, Iran. The results of power spectral analysis in the two studied wells reveal the main spectral peaks at wavelengths of long-eccentricity, short-eccentricity, obliquity, and precession cycles. Based on the orbital tuning using the long-eccentricity cycles, a floating astronomical time scale was established, according to which the depositional duration of Kangan Formation was estimated to be 1.6 ± 0.1 Myr. As well as, the duration of the Induan Stage of the Early Triassic Epoch in this study is estimated to be at least 1.6 Myr. Also, by integrating cyclostratigraphic analysis, results of the statistical methods of sedimentation rate evaluation, i.e., evolutionary correlation coefficient (COCO), it was estimated that the sedimentation rates of Kangan Formation in the two studied wells of Salman gas field increased from ~8 cm/kyr in the bottom to about 12–18 cm/kyr in the upper part, which were linked with the delayed life recovery in Early Triassic. We also observed an enhanced sedimentary noise (ESN) interval in eCOCO maps of the K1 member (upper part of Kangan Formation) at two studied wells, which were linked with the global sea-level fall in the late Griesbachian substage of the Early Triassic. The results of this study show that cyclostratigraphy has made an effective contribution towards analyzing sea-level change and estimating sediment accumulation rates and depositional duration of the Kangan Formation. © 2020 Elsevier B.V.
英文关键词	Astrochronology; Early Triassic; Middle East; Milankovitch cycles; Petrophysical well logs; Sediment accumulation rate
语种	英语
scopus关键词	cyclostratigraphy; eccentricity; gas field; sedimentation rate; Triassic; Arabian Sea; Indian Ocean; Iran; Persian Gulf
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150266
作者单位	Department of Geology, Faculty of Sciences, Urmia University, Urmia, Iran; Earth Sciences Department, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran; Department of Geosciences, Pennsylvania State University, University ParkPA 16802, United States; School of Earth and Space Sciences, Peking UniversityBeijing 100871, China
推荐引用方式 GB/T 7714	Falahatkhah O.,Kadkhodaie A.,Ciabeghodsi A.A.,et al. Cyclostratigraphy of the Lower Triassic Kangan Formation in the Salman gas field; eastern Persian Gulf; Iran[J],2021,561.
APA	Falahatkhah O.,Kadkhodaie A.,Ciabeghodsi A.A.,&Li M..(2021).Cyclostratigraphy of the Lower Triassic Kangan Formation in the Salman gas field; eastern Persian Gulf; Iran.Palaeogeography, Palaeoclimatology, Palaeoecology,561.
MLA	Falahatkhah O.,et al."Cyclostratigraphy of the Lower Triassic Kangan Formation in the Salman gas field; eastern Persian Gulf; Iran".Palaeogeography, Palaeoclimatology, Palaeoecology 561(2021).