铁锰结壳中深海锌同位素组成的新生代记录

IF 1.9 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY American Journal of Science Pub Date : 2023-11-16 DOI:10.2475/001c.89628

Mingyu Zhao, Noah Planavsky, Xiangli Wang, Yiyue Zhang, J. Hein

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引用次数: 0

摘要

深海（>1000 米）的锌（Zn）同位素组成（δ66Zn）可以让我们深入了解碳循环、生物泵和热液活动。然而，我们对深海锌同位素时空演变的了解并不全面。在此，我们展示了太平洋铁锰壳的δ66Zn新值，并以此重建了新生代深海δ66Zn的演变。我们的结果表明，在整个新生代，太平洋深海的δ66Zn值稳定在约0.5‰。我们的结果限制了新生代有机锌埋藏的变化范围。然而，考虑到全球质量平衡的不确定性和分析误差，有机锌埋藏量仍有可能出现约20%的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A Cenozoic Record of Deep Oceanic Zn Isotopic Composition in Ferromanganese Crusts

The zinc (Zn) isotopic composition (δ66Zn) of the deep ocean (>1000 m) can provide insights into the carbon cycle, the biological pump, and hydrothermal activity. However, we have an incomplete view of the temporal and spatial evolution of deep-ocean Zn isotopes. Here, we present new δ66Zn values of Fe-Mn crusts from the Pacific Ocean, which we used to reconstruct the evolution of deep-ocean δ66Zn for the Cenozoic. Our results suggest that the δ66Zn values remain stable in the deep Pacific Ocean at around ~ 0.5‰ through the Cenozoic. Our results limit the extent of change in organic zinc burial through the Cenozoic. However, given uncertainties in the global mass balance and analytical error, variations of roughly 20% in organic zinc burial are still possible.

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来源期刊

American Journal of Science 地学-地球科学综合

CiteScore

5.80

自引率

3.40%

发文量

审稿时长

>12 weeks

期刊介绍： The American Journal of Science (AJS), founded in 1818 by Benjamin Silliman, is the oldest scientific journal in the United States that has been published continuously. The Journal is devoted to geology and related sciences and publishes articles from around the world presenting results of major research from all earth sciences. Readers are primarily earth scientists in academia and government institutions.