Collaborative Research: Calibration of Raman Spectroscopy for Calcite Saturation State in Marine Biogenic Calcification
合作研究:海洋生物钙化中方解石饱和状态的拉曼光谱校准
基本信息
- 批准号:2323221
- 负责人:
- 金额:$ 36.85万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2023
- 资助国家:美国
- 起止时间:2023-09-01 至 2026-08-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Much of the anthropogenic CO2 released into the atmosphere has been absorbed by the ocean, which acts as a buffer against global warming and rapid climate change. But this makes seawater more acidic and corrosive to CaCO3 minerals (known as ocean acidification: OA), which is expected to harm marine organisms that build skeletons or shells from CaCO3 (marine calcifiers). Marine calcifiers typically grow their CaCO3 hard parts in a micro-scale “calcifying fluid (CF)” by modifying its chemistry from seawater to elevate the degrees of CaCO3 saturation (Ω). This process potentially enables calcifiers to cope with OA, at least to some extent. This research aims to establish the use of Raman Spectroscopy (RS) to constrain Ω of CF. Compared to other methods, this approach will be simple, rapid, and non-destructive to organisms and CaCO3 samples. This work will be a cornerstone for an important methodology that can advance knowledge on calcification mechanisms and resilience of marine calcifiers against OA. Rapid precipitation of CaCO3 at higher Ω levels leads to greater structural disorder in the mineral lattice due to increased defects and kinetically-driven uptake of minor/trace elements (e.g., Mg). Thus, the degree of lattice disorder determined from the positional shift in and width of Raman peaks should be a function of Ω. This concept has been validated for aragonites and RS has been extensively used to constrain Ω of CF in aragonitic calcifiers. But in calcites, Mg inclusion by substitution of Ca also contributes to structural disorder significantly. This necessitates a correction for Mg-driven lattice disorder for effective use of RS on calcitic organisms, which is currently lacking. This research will produce an extensive set of abiogenic calcite samples that vary significantly in Mg contents and solution Ω for precipitation based on laboratory experiments using artificial seawater. These samples will disentangle the overlapping effect of Mg inclusion and Ω on calcite structural disorder. This investigation will for the first time generate Raman calibrations for Mg contents and Ω that are applicable to marine biogenic calcites. This project is jointly funded by the Geobiology and Low-Temperature Geochemistry Program (GG), the Established Program to Stimulate Competitive Research (EPSCoR), and the Marine Geology and Geochemistry Program (MGG).This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
人类释放到大气中的大部分二氧化碳已经被海洋吸收,海洋起到了减缓全球变暖和快速气候变化的缓冲作用。但这使得海水变得更酸,对CaCO3矿物具有更强的腐蚀性(称为海洋酸化:OA),这预计会损害用CaCO3(海洋钙化剂)构建骨骼或外壳的海洋生物。海洋钙化剂通常在微尺度的“钙化流体(CF)”中生长CaCO3硬部分,通过改变海水中的化学成分来提高CaCO3的饱和度(Ω)。这个过程可能使钙化者至少在一定程度上应对OA。本研究旨在建立利用拉曼光谱(RS)来约束CF的Ω。与其他方法相比,该方法简单,快速,对生物体和CaCO3样品无破坏性。这项工作将成为一种重要方法的基石,该方法可以促进对钙化机制和海洋钙化剂对OA的恢复能力的了解。在较高Ω水平下CaCO3的快速沉淀会导致矿物晶格中更大的结构紊乱,这是由于缺陷增加和微量元素(如Mg)的动力学驱动吸收。因此,由拉曼峰的位置位移和宽度确定的晶格无序程度应该是Ω的函数。这一概念已在文石中得到验证,RS已被广泛用于约束文石钙化剂中CF的Ω。但在方解石中,钙取代镁包合也会导致结构紊乱。这需要对镁驱动的晶格紊乱进行校正,以便有效地利用RS对钙化生物,这是目前缺乏的。本研究将产生一套广泛的非生物成因方解石样品,这些样品在Mg含量和沉淀溶液Ω上变化显著,基于人工海水的实验室实验。这些样品将解开镁包裹体和Ω对方解石结构紊乱的重叠效应。这项研究将首次产生适用于海洋生物方解石的Mg含量和Ω的拉曼校准。该项目由地球生物学和低温地球化学计划(GG)、刺激竞争性研究的既定计划(EPSCoR)和海洋地质和地球化学计划(MGG)共同资助。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Joji Uchikawa其他文献
Changes in calcium ion concentration as the common driver for Na, K, S, and B incorporation during inorganic calcite precipitation in Mg-free artificial seawater
在无镁人造海水中无机方解石沉淀过程中,钙离子浓度的变化是钠、钾、硫和硼掺入的共同驱动因素
- DOI:
10.1016/j.gca.2025.03.022 - 发表时间:
2025-06-01 - 期刊:
- 影响因子:5.000
- 作者:
Joji Uchikawa;Szabina Karancz;Mariëtte Wolthers;Laura Pacho;Dustin T. Harper;Donald E. Penman;Lennart J. de Nooijer;Gert-Jan Reichart;Richard E. Zeebe - 通讯作者:
Richard E. Zeebe
Sulfate and phosphate oxyanions alter B/Ca and δsup11/supB in inorganic calcite at constant pH: Crystallographic controls outweigh normal kinetic effects
硫酸盐和磷酸盐含氧阴离子在恒定 pH 下改变无机方解石中的 B/Ca 和 δ11B:晶体学控制胜过正常的动力学效应
- DOI:
10.1016/j.gca.2022.12.018 - 发表时间:
2023-02-15 - 期刊:
- 影响因子:5.000
- 作者:
Joji Uchikawa;Donald E. Penman;Dustin T. Harper;Jesse R. Farmer;James C. Zachos;Noah J. Planavsky;Richard E. Zeebe - 通讯作者:
Richard E. Zeebe
Strong and persistent mineral-specific lithium isotope fractionation: no discernable kinetic isotope effects during inorganic calcite and aragonite precipitation
强烈且持久的矿物特异性锂同位素分馏:在无机方解石和文石沉淀过程中没有可察觉的动力学同位素效应
- DOI:
10.1016/j.gca.2025.03.030 - 发表时间:
2025-05-15 - 期刊:
- 影响因子:5.000
- 作者:
Corinne Hite;Joji Uchikawa;Sambuddha Misra;I.V. Satya Chanakya;Pratyusha Chanda;Richard E. Zeebe - 通讯作者:
Richard E. Zeebe
Joji Uchikawa的其他文献
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{{ truncateString('Joji Uchikawa', 18)}}的其他基金
Collaborative Research: Effects of sulfate on boron incorporation into calcite: Relevance and implications for foraminiferal boron isotope and B/Ca paleo-proxies.
合作研究:硫酸盐对硼掺入方解石的影响:有孔虫硼同位素和 B/Ca 古代理的相关性和影响。
- 批准号:
2024631 - 财政年份:2020
- 资助金额:
$ 36.85万 - 项目类别:
Standard Grant
Ground-truthing lithium paleo-proxies: Experimental study on the Li incorporation and isotope fractionation during inorganic calcite and aragonite precipitation
真实的锂古代理:无机方解石和霰石沉淀过程中锂的掺入和同位素分馏的实验研究
- 批准号:
2001927 - 财政年份:2020
- 资助金额:
$ 36.85万 - 项目类别:
Standard Grant
Assessing the effects of carboxylated amino acids and polysaccharides on the fluid-calcite element partitioning
评估羧化氨基酸和多糖对流体-方解石元素分配的影响
- 批准号:
1536743 - 财政年份:2015
- 资助金额:
$ 36.85万 - 项目类别:
Standard Grant
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