文献类型：期刊文献

英文题名：Seawater temperatures during the early to middle Ediacaran: Phosphate oxygen isotope records

作者：Fan, Haifeng Chen, Zhigang Zhang, Fang Zhu, Chuanwei Du, Shengjiang Zhang, Yuxu Wen, Hanjie Khan, Danish Algeo, Thomas J.

第一作者：Fan, Haifeng

通信作者：Fan, HF[1]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang 550081, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China;[4]Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Peoples R China;[5]Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China;[6]Univ Cincinnati, Dept Geosci, Cincinnati, OH 42221 USA;[7]China Univ Geosci, State Key Labs Biogeol & Environm Geol & Geol Proc, Wuhan 430074, Peoples R China;[8]Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploitat, Chengdu 610059, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang 550081, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang 550081, Peoples R China.

年份：2025

卷号：678

外文期刊名：CHEMICAL GEOLOGY

收录：;EI(收录号：20250517802298);Scopus(收录号：2-s2.0-85216553468);WOS:【SCI-EXPANDED(收录号:WOS:001421712300001)】；

基金：This research was funded by the NSFC (92062221, 42121003, 42073016) , Guizhou Provincial Science and Technology Subsidies (GZ2020SIG, GZ2021SIG) , Project of Guizhou Basic Research Plan-2025 (Natural Science) , and Start-up Fund for High-level Talents of Guizhou Institute of Technology (2023GCC048) . We also thank Dr. Xinqiang Wang for providing five samples from the Wuhe section.

语种：英文

外文关键词：Multicellular; Eukaryotes; Doushantuo Formation; South China; Lantian Biota; Weng'an Biota

摘要：Early multicellular eukaryotes are hypothesized to have first evolved in deep-water (i.e., subphotic) environments with a narrow temperature range and low oxygen levels (pO(2)). However, seawater paleotemperature estimates for the Ediacaran Period remain poorly known. To address this issue, we measured the oxygen isotopic compositions of phosphate (delta O-18(P)) in fine-grained marine siliciclastic sedimentary rocks from two slope sections of the Doushantuo Formation (similar to 635-551 Ma) in the Nanhua Basin, South China. The bulk delta O-18(P) values (similar to 19-26 parts per thousand) found in early-middle Ediacaran phosphatic marine shales represent the oldest known records of modern seawater-like delta O-18(P) values. These values are inferred to record original seawater signatures and suggest that subtropical surface temperatures had a modern-like range of 15-30 degrees C. Based on these estimates, we propose that the extreme greenhouse conditions of the earliest Ediacaran following the Marinoan Ice Age were of quite short duration (