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. 2023 Aug 12;13:13128. doi: 10.1038/s41598-023-40334-y

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© The Author(s) 2023

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/.

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Stable isotope and trace element distribution patterns of sample rocks in the Second Member, Qixia Formation and Wulong section. (a) Cross-plot of V/Cr and Ni/Co values. (b) Cross-plot of δ¹³C_VPDB and δ¹⁸O_VPDB values. Palaeoredox conditions range of trace element values from Bryn and Manning⁴⁸. Typical isotopic values of dolomite formed under low temperatures and high temperatures from Allan⁵².