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阿普特期大陆断陷盆地对全球 OAE1a 的响应：中国东北红庙子盆地。

Response of a continental fault basin to the global OAE1a during the Aptian: Hongmiaozi Basin, Northeast China.

机构信息

College of Earth Sciences, Jilin University, Changchun, 130012, China.

Key Laboratory for Evolution of Past Life and Environment in Northeast Asia (Jilin University), Ministry of Education, Changchun, 130012, Jilin, China.

出版信息

Sci Rep. 2021 Mar 31;11(1):7229. doi: 10.1038/s41598-021-86733-x.

DOI:10.1038/s41598-021-86733-x
PMID:33790377
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8012632/
Abstract

This paper presents new research on a lacustrine anoxic event (LAE). These data include stable carbon isotope (δC), pyrite sulfur isotope (δS), trace element and biomarker ratios from the Hongmiaozi Basin (North China) and unravel the response of continental lakes under the influence of early Aptian extreme climate conditions. According to the stratigraphic chronology (122-118 Ma) and carbon isotope correlations, terrestrial sediment was influenced by the early Aptian Oceanic Anoxic Event (OAE1a). The results show that the Xiahuapidianzi Group experienced a significant warming process under negative excursions in carbon isotopes due to the influence of increased carbon dioxide partial pressure (pCO). The climate varied from warm and humid to hot and arid (high Sr/Cu, low Rb/Sr, calcareous mudstone), the evaporation and salinity increased (high Sr/Ba and B/Ga), and land input sources decreased (low Zr, Ti and Th). Moreover, high total organic carbon (TOC) content was source from bacteria, algae (n-alkanes), and euxinic depositional environments (Pr/Ph, Cu/Zn and U V Mo). In the stage of continuous carbon isotopes positive excursion, organic matter accumulated rapidly. A paleolake environment model has provided a better understanding of current global climate issues under global warming caused by increased carbon dioxide concentrations.

摘要

本文提出了一项关于湖泊缺氧事件（LAE）的新研究。这些数据包括来自中国北方红庙子盆地的稳定碳同位素（δC）、黄铁矿硫同位素（δS）、微量元素和生物标志物比值，揭示了在早白垩世极端气候条件下大陆湖泊的响应。根据地层年代学（122-118 Ma）和碳同位素相关性，陆地沉积物受到早白垩世海洋缺氧事件（OAE1a）的影响。研究结果表明，由于二氧化碳分压（pCO）增加的影响，下桦皮店子组在碳同位素负偏移期间经历了显著的变暖过程。气候从温暖潮湿变为炎热干旱（高 Sr/Cu，低 Rb/Sr，钙质泥岩），蒸发和盐度增加（高 Sr/Ba 和 B/Ga），陆地输入源减少（低 Zr、Ti 和 Th）。此外，高总有机碳（TOC）含量来自细菌、藻类（正烷烃）和缺氧沉积环境（Pr/Ph、Cu/Zn 和 U V Mo）。在连续碳同位素正偏移阶段，有机质迅速积累。古湖泊环境模型为因二氧化碳浓度增加而导致的全球变暖下当前全球气候问题提供了更好的理解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/8148194ee67b/41598_2021_86733_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/fa62258f95ed/41598_2021_86733_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/94e4b7795361/41598_2021_86733_Fig2_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/748f5b889882/41598_2021_86733_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/99554dde2c07/41598_2021_86733_Fig5_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/105244d592b7/41598_2021_86733_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/8148194ee67b/41598_2021_86733_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/fa62258f95ed/41598_2021_86733_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/94e4b7795361/41598_2021_86733_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/e0c675d3e48e/41598_2021_86733_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/748f5b889882/41598_2021_86733_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/99554dde2c07/41598_2021_86733_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/2f9272532286/41598_2021_86733_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/fd30f525e89a/41598_2021_86733_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/d822ddfe9eb4/41598_2021_86733_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/105244d592b7/41598_2021_86733_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c478/8012632/8148194ee67b/41598_2021_86733_Fig10_HTML.jpg

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