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      Multifractal characterization of the Coniacian–Santonian OAE3 in lacustrine and marine deposits based on spectral gamma ray logs

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          Abstract

          Limited to the Atlantic and its surrounding basins, the expression of the Coniacian–Santonian oceanic anoxic event (OAE3) was discovered in the non-marine Cretaceous Songliao Basin, Eastern Asia not long ago. In this study, based on spectral gamma ray logs data recorded in three basins, the self-similarity of the OAE3 was studied through the analysis of the scaling properties of thorium–potassium and thorium–uranium distributions both in marine and terrestrial environments using the multifractal detrending fluctuation analysis. The results indicate that, in both marine and terrestrial systems, the OAE3 intervals are characterized by their multifractal nature due to long-range correlation. However, the multifractal features of the studied OAE3 intervals are different in the three basins, although some common trends were observed. By comparing the degree of multifractality of the OAE3 deposits with the clay minerals and the redox conditions, it appears that the changes of the multifractal features are controlled by local changes such as clay mineralogy and redox conditions in both milieus under different sedimentation patterns. At all sites, the left side shortened spectrum of the thorium–potassium distribution suggests the presence of local fluctuations with minor amplitudes during the OAE3. Furthermore, the shortened singularity spectrum of the thorium–uranium distribution reflects the existence of small-scale fluctuations with large amplitudes at marine sites while in the non-marine Songliao Basin, the thorium–uranium distribution suggests the presence of local fluctuations with small amplitudes during the OAE3. Therefore, a more local behavior of the event is considered although the regional character is not neglected.

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                Author and article information

                Contributors
                zoucc@cugb.edu.cn
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                1 September 2020
                1 September 2020
                2020
                : 10
                : 14363
                Affiliations
                [1 ]GRID grid.419897.a, ISNI 0000 0004 0369 313X, Key Laboratory of Geo-Detection (China University of Geosciences, Beijing), Ministry of Education, ; Beijing, 100083 China
                [2 ]GRID grid.162107.3, ISNI 0000 0001 2156 409X, School of Geophysics and Information Technology, , China University of Geosciences, ; Beijing, 100083 China
                [3 ]GRID grid.162107.3, ISNI 0000 0001 2156 409X, Institute of Earth Sciences, , China University of Geosciences, ; Beijing, 100083 China
                [4 ]GRID grid.162107.3, ISNI 0000 0001 2156 409X, School of Earth Science and Resources, , China University of Geosciences, ; Beijing, 100083 China
                [5 ]GRID grid.442311.1, ISNI 0000 0004 0452 2586, Petroleum Engineering Department, Faculty of Mineral Resources Technology, , University of Mines and Technology, ; Tarkwa, Ghana
                Article
                71327
                10.1038/s41598-020-71327-w
                7462867
                32873868
                d1bec196-26f8-4690-b3ba-a28780de501e
                © The Author(s) 2020

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 19 August 2019
                : 14 August 2020
                Categories
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                Custom metadata
                © The Author(s) 2020

                Uncategorized
                climate sciences,ocean sciences,solid earth sciences
                Uncategorized
                climate sciences, ocean sciences, solid earth sciences

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