Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/cp-2017-133
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
01 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Climate of the Past (CP).
Palaeoclimate evolution across the Cretaceous–Palaeogene boundary in the Nanxiong Basin (SE China) recorded by red strata and its correlation with marine records
Mingming Ma1,2, Xiuming Liu1,2,3, and Wenyan Wang1,2 1Institute of Geography, Fujian Normal University, Fuzhou, 350007, China
2Key Laboratory for Subtropical Mountain Ecology (Funded by the Ministry of Science and Technology and Fujian Province), College of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
3Department of Environment and Geography, Macquarie University, NSW 2109, Australia
Abstract. The climate during the Cretaceous Period represented one of the greenhouse states of Earth's history. Significant transformation of climate patterns and a mass extinction event characterised by the disappearance of dinosaurs occurred across Cretaceous–Palaeogene boundary. However, most records of this interval are derived from marine sediments. The continuous and well-exposed red strata of the Nanxiong Basin (SE China) provide ideal material to develop continental records. Considerable research into stratigraphic, palaeontological, chronologic, palaeoclimatic, and tectonic aspects has been carried out for the Datang Profile, which is a type section of a non-marine Cretaceous–Palaeogene stratigraphic division in China. For this study, we reviewed previous work and found that: 1) the existing chronological framework of the Datang Profile is flawed; 2) precise palaeoclimatic reconstruction is lacking because of the limitations of sampling resolution (e.g. carbonate samples) and/or the lack of efficient proxies; and 3) comparisons of climate changes between marine and continental records are lacking. To resolve these problems, detailed field observations and sampling, as well as environmental magnetic and rare earth element (REE) measurements, were carried out. The results show that: 1) more accurate ages of the Datang Profile range from 72 Ma to 62.8 Ma, based on a combination of the most recently published radiometric, palaeontological and palaeomagnetic ages; 2) there is considerable evidence of palaeosol generation, which indicates that the red strata formed in a long-term hot, oxidizing environment that lacked of underwater condition; 3) haematite was the dominant magnetic mineral in the red strata, and the variation trend of magnetic susceptibility was consistent with the oxygen isotope records from deep-sea sediments, which indicates that the pedogenic intensity was controlled by global climate; and 4) the palaeoclimate changes from 72 Ma to 62.8 Ma in the Nanxiong Basin were consistent with global patterns, and can be divided into three stages: a relatively hot and wet stage during 72–71.5 Ma, a cool and arid stage during 71.5–66 Ma, and a relatively hot and wet stage again during 66–62.8 Ma with a notable drying and cooling event at 64.7–63.4 Ma. Moreover, there are several sub-fluctuations during each stage. This work provides basic information for further palaeoclimate reconstruction with higher resolution and longer time scales for the Cretaceous to Palaeocene in the Nanxiong Basin, and may even help to test ocean–land climate interactions in the future.

Citation: Ma, M., Liu, X., and Wang, W.: Palaeoclimate evolution across the Cretaceous–Palaeogene boundary in the Nanxiong Basin (SE China) recorded by red strata and its correlation with marine records, Clim. Past Discuss., https://doi.org/10.5194/cp-2017-133, in review, 2017.
Mingming Ma et al.
Mingming Ma et al.
Mingming Ma et al.

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Short summary
Significant climate changes and biotic turnovers had occurred across the Cretaceous-Paleogene boundary (KTB) interval. It is of great significance to carry out the research of paleoclimate evolution across KTB in terrestrial Basin because we lack many KTB records in this part of the world. Here we provid a new terrestrial record from Nanxiong Basin (SE China) and compare with marine records to provide reliable terrestrial records for future investigation of ocean–land climate interaction.
Significant climate changes and biotic turnovers had occurred across the Cretaceous-Paleogene...
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