Article
Geosciences, Multidisciplinary
Xi Chen, Ying Zhou, Graham A. Shields
Summary: The secular trend of seawater strontium isotope ratio provides important information about changes in ocean composition and global tectonic events. This study compiled and evaluated strontium isotope ratio data of Precambrian marine sedimentary rocks and generated an improved seawater Sr-87/Sr-86 curve. The results indicate an earlier deviation of seawater Sr-87/Sr-86 from the mantle, as well as stronger oscillations and better correspondence with supercontinent cycles than previously shown.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
T. Kani, K. Misawa, N. Morikawa, K. Kazahaya, F. Kusuhara, S. Yoneda, Y. Terakado
Summary: In the southwest Japan forearc, deep-seated brines known as Arima-type saline water likely originate from upwelling slab-fluids along major faults. These saline waters have light and radiogenic strontium isotope compositions, indicating their primary characteristic of slab-fluids without crustal influence. The signature of forearc depth slab-fluids in the Arima-type brines differs from the slab-fluids at subarc depth estimated from arc lavas, suggesting a larger contribution of subducted sediments and strontium isotope fractionation during fluids generation at shallower depth.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Xiaodong He, Peiyue Li, Hua Shi, Yuanxiang Xiao, Yanan Guo, Hanghang Zhao
Summary: In this study, the sources of strontium and its isotopic composition in hydraulic fracturing flowback fluid were identified, and it was determined that 87Sr/86Sr can be used as a sensitive indicator for groundwater pollution. A modeling approach was used to assess the sensitivity of 87Sr/86Sr in indicating contamination, and it was found that even a small amount (0.89%) of fracturing flowback fluid can be identified using this method.
Review
Geosciences, Multidisciplinary
Emily Holt, Jane A. Evans, Richard Madgwick
Summary: Using bioavailable strontium to trace the origin of biological materials has become increasingly common over the past four decades, with methodological challenges in producing and interpreting isoscapes. Current research suggests that modern plant materials provide the best approximation of bioavailable strontium and can be combined with other archives for more accurate results. Machine learning approaches show promise for producing more accurate and wide-ranging isoscapes in the future.
EARTH-SCIENCE REVIEWS
(2021)
Article
Ecology
Andrew Sillen
Summary: The stable isotope ratio Sr-87/Sr-86 is valuable for tracking the movement and life-histories of humans and animals in history and prehistory. Over the past thirty years, it has evolved from a niche approach to a standard part of archaeological and paleobiological research. Its interdisciplinary nature serves as both a strength and a hindrance to further development.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Geochemistry & Geophysics
Jiuyuan Wang, Andrew D. Jacobson, Bradley B. Sageman, Matthew T. Hurtgen
Summary: Several studies have used stable calcium and strontium isotopes in marine carbonate rocks to investigate ancient carbon cycle dynamics and seawater geochemistry. However, these proxies have rarely been used together. The δ44/40Ca- δ88/86Sr multi-proxy can distinguish between different processes affecting the isotope compositions and provides additional constraints on mixing. This multi-proxy was applied to two Marinoan cap carbonate sequences from Namibia, revealing primary environmental signals deriving from seawater-glacial meltwater mixing and kinetic isotope effects.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Chao-Feng Li, Xuan-Ce Wang, Zhu-Yin Chu, Peng Peng
Summary: Thermal ionization mass spectrometry (TIMS) is the standard method for obtaining precise Sr-87/Sr-86 isotopic ratios. However, our developed hydrofluoric acid coprecipitation method offers a low-cost, rapid, simple, and high-throughput alternative for analyzing red wine samples, effectively eliminating isobaric interference and matrix element inhibition.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Applied
Felix Bacher, Agnese Aguzzoni, Samira Chizzali, Emanuela Pignotti, Hannes Puntscher, Pietro Zignale, Giulio Voto, Massimo Tagliavini, Werner Tirler, Peter Robatscher
Summary: The study explores the possibility of discriminating between cereal samples from South Tyrol and neighboring regions using 87Sr/86Sr ratios. Soil and grain samples were collected from around 100 fields, and a high correlation between the ratios in cereal grains and soil samples was found. Cereal samples from South Tyrol exhibited relatively high 87Sr/86Sr values, distinguishing them from other regions and global cereal production areas.
Article
Anthropology
V. Yulia Erban Kochergina, Martin Novak, Vojtech Erban, Marketa Stepanova
Summary: Strontium isotope ratios in trees can be a powerful tool in archaeological wood provenance studies, but the influence of meteorological factors and bedrock types needs further investigation.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2021)
Article
Environmental Sciences
Chunchao Zhang, Xiangquan Li, Zhenxing Wang, Xinwei Hou, Jianfei Ma, Ming Gao, Zhanxue Bai, Changchang Fu, Chunlei Gui, Xuefeng Zuo
Summary: In this study, multiple hydrogeochemical indices and isotopes were used to analyze the factors controlling groundwater salinization and processes in the Xin'an karst groundwater system in Shanxi, China. The region's karst groundwater system was divided into three subsystems with distinct geological characteristics. The dominant chemical type of the karst groundwater system was HCO3-Ca center dot Mg. Hydrogeochemical processes differed between subsystems, with Sr2+ content and TDS concentrations increasing along the flow direction in two subsystems, while decreasing in the third subsystem. Major ions originated from carbonate and sulfate minerals dissolution, with sulfate minerals dissolution being the main contributor to the increase in groundwater salinity. The results provide valuable insights for the management and utilization of karst groundwater resources.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Environmental Sciences
Toshihiro Yoshimura, Shigeyuki Wakaki, Nozomu Iwasaki, Tsuyoshi Ishikawa, Naohiko Ohkouchi
Summary: Stable isotope ratios of Sr (Sr-88/Sr-86) can be used as an indicator to identify terrestrial and oceanic Sr cycling and biological processes. By studying the calcite skeletons of precious corals, it was found that the δSr-88 values are temperature dependent. The δSr-88 values of the precious coral skeletons can serve as excellent recorders of ambient seawater.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Teresa D. Avila, Matthew R. Saltzman, Y. Datu Adiatma, Michael M. Joachimski, Elizabeth M. Griffith, John W. Olesik
Summary: This study suggests that increased hydrothermal weathering played a role in driving marine Sr-87/Sr-86 during the Ordovician period, accompanied by climate cooling.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Chemistry, Analytical
B. Puente-Berdasco, J. Rodriguez, D. Ballesteros, A. Painchault, C. Nehme, D. Mouralis, J. I. Gil-Ibarguchi, A. Martin-Izard, J. I. Garcia Alonso
Summary: A reliable method for measuring the Sr-87/Sr-86 ratio in carbonates without off-line strontium separation was developed and validated. The results were in agreement with expected values, making it suitable for geological studies.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Environmental Sciences
M. Glok-Galli, I. Vadillo-Perez, P. Jimenez-Gavilan, L. Ojeda, B. Urresti-Estala, D. E. Martinez
Summary: The integrated use of multi-isotopic and hydrochemical data can improve the understanding of water contamination sources and achieve improved water resource management. Isotopes can serve as tracers of pollutants and differentiate different water recharge end members. The study also identified domestic detergents as an anthropogenic source of strontium and sulphate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Yann Lucas, Francois Chabaux, Alain Clement, Bertrand Fritz, Coralie Ranchoux, Julien Ackerer, Eric Pelt, Anne-Desiree Schmitt, Peter Stille
Summary: The decrease in Sr concentrations in CS springs in the Strengbach catchment can be explained by the response of mineral weathering to pH increase. The different responses of CS springs to the increase in pH can be explained by the length of water residence time in the bedrock. The isotopic variations in CS springs can be explained by differences in transit time and saturation of water with respect to minerals.
Article
Biology
Marius N. Mueller, Frederico P. Brandini, Thomas W. Trull, Gustaaf M. Hallegraeff
Summary: The study found that environmental factors such as temperature, irradiance, carbonate chemistry, and macronutrient limitation significantly affect the coccosphere, coccolith, and cell volume of the Southern Ocean Emiliania huxleyi ecotype A. There is a strong correlation between cell and coccolith volume, indicating that coccolith volume is primarily controlled by physiological changes in cell volume. Macronutrient limitation, particularly of phosphorus and nitrogen, has the greatest influence on coccolith volume compared to other environmental drivers.
Article
Multidisciplinary Sciences
Nico Augustin, Froukje M. van der Zwan, Colin W. Devey, Bryndis Brandsdottir
Summary: Based on earthquake data, vertical gravity gradient data and high-resolution bathymetry, the research indicates that the Red Sea is a mature ocean basin where continuous seafloor spreading began along its entire length around 13 million years ago.
NATURE COMMUNICATIONS
(2021)
Article
Geochemistry & Geophysics
F. Schmid, M. Cremanns, N. Augustin, D. Lange, F. Petersen, H. Kopp
Summary: The researchers located 697 micro-earthquakes at the southern Fonualei Rift and Spreading Center and found that most epicenters concentrated along the central region of the axial valley, with a majority of events associated with a 138-hour lasting earthquake swarm. The tectonic structure of the ridge axis in the S-FRSC resembles a series of left-stepping en echelon segments expressed at the seafloor by numerous volcanic ridges.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Multidisciplinary Sciences
Bruce L. A. Charlier, Francois L. H. Tissot, Hauke Vollstaedt, Nicolas Dauphas, Colin J. N. Wilson, Ren T. Marquez
Summary: Experimental results on CAIs from the Allende meteorite suggest that extreme Sr-84 anomalies may be caused by the presence of a presolar carrier enriched in the p-nuclide Sr-84. This discovery reinstates the chronological significance of differences in initial Sr-87/Sr-86 ratios between CAIs and volatile-depleted inner solar system materials.
Article
Environmental Sciences
Klaus Wallmann, Yonss S. Jose, Mark J. Hopwood, Christopher J. Somes, Andrew W. Dale, Florian Scholz, Eric P. Achterberg, Andreas Oschlies
Summary: A new model is used to simulate the nutrient cycling in the Peruvian oxygen minimum zone. The model shows that dissolved iron is the limiting nutrient for primary production and is released from sediments. Simulations indicate that the productivity of the OMZ will increase due to enhanced iron release. However, further phytoplankton growth will be limited by the loss of reactive nitrogen.
Article
Geochemistry & Geophysics
Filip Scheiner, Lukas Ackerman, Katarina Holcova, Jan Rejsek, Hauke Vollstaedt, Jana Durisova, Vaclav Santolik
Summary: The Nd-143/Nd-144 isotopic composition of foraminifera is a useful proxy for tracing specific water masses in paleoceanographic studies, but its applicability is limited by the amount of material needed for analysis. In this study, we analyzed foraminiferal samples weighing only 300-500 μg and showed that even very low Nd loads can yield precise results. We also found significant naturally induced Nd isotopic variability among different foraminiferal species.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Limnology
Marina T. Botana, Adriano B. Chaves-Filho, Alex Inague, Arthur Z. Guth, Flavia Saldanha-Correa, Marius N. Muller, Paulo Y. G. Sumida, Sayuri Miyamoto, Matthias Y. Kellermann, Raymond C. Valentine, Marcos Y. Yoshinaga
Summary: Coral decline caused by ocean warming is a global issue. This study used an untargeted lipidomic approach to examine the changes in lipidome and pigments of coral symbionts after a heat shock. The results showed that heat sensitive symbionts displayed changes in lipidome and pigments, while heat tolerant symbionts maintained stable membrane lipids. These findings provide a baseline for further research on lipid biomarkers linked to thermal stress.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Geochemistry & Geophysics
Neil C. Mitchell, Karina Hernandez, Jonas Preine, Marco Ligi, Nico Augustin, Ay Izzeldin, Christian Huebscher
Summary: Rayleigh-Taylor models predict that diapirs should develop with characteristic spacings, but our study on the deep-water Miocene evaporites in the Red Sea shows that the diapirism does not have a uniform scale. The topography of the S-reflection indicates stochastic behavior with a range of around 3 km. The Rayleigh-Taylor model does not explain the deformation in the Red Sea evaporites. The findings provide insights into the vertical and length scales of early-stage salt giants.
Editorial Material
Environmental Sciences
Brett W. W. Molony, Alex T. T. Ford, Ana M. M. Sequeira, Angel Borja, Anna Milena Zivian, Carol Robinson, Christian Lonborg, Elva G. G. Escobar-Briones, Emanuele Di Lorenzo, Jesper H. H. Andersen, Marius N. N. Mueller, Michelle J. J. Devlin, Pierre Failler, Sebastian Villasante, Simone Libralato, Tomaso Fortibuoni
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Carlos Yure B. Oliveira, Jessika L. Abreu, Elizabeth P. Santos, Angelo P. Matos, Giustino Tribuzi, Cicero Diogo L. Oliveira, Bruno O. Veras, Railson S. Bezerra, Marius N. Muller, Alfredo O. Galvez
Summary: This study investigated the effects of irradiance mediated by light-emitting diodes on growth performance, carotenoid and fatty acid profiles, and antioxidant activity of the endosymbiotic dinoflagellate Durusdinium glynnii. The results showed that D. glynnii is well adapted to low-light conditions but can also tolerate high light intensities. The accumulation of peridinin, a light-harvesting carotenoid, in D. glynnii occurred during high-light exposure. The study contributes to understanding the photoprotective role of peridinin in endosymbiont dinoflagellates and highlights the antioxidant activity of peridinin-rich extracts.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Biology
Konstantina Agiadi, Frederic Quillevere, Rafal Nawrot, Theo Sommeville, Marta Coll, Efterpi Koskeridou, Jan Fietzke, Martin Zuschin
Summary: Mesopelagic fishes play crucial roles in marine food webs, are a vast but largely untapped food resource, and contribute significantly to the biological carbon pump. However, their future under climate change scenarios remains uncertain.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Geochemistry & Geophysics
Jan Fietzke, Eleni Anagnostou
Summary: Laser ablation multi-collector-inductively coupled plasma-mass spectrometry (LA-MC-ICP-MS) is a valuable tool for in situ measurement of boron isotope composition in geological samples, but it faces significant analytical challenges. This study focuses on the underlying processes causing inaccuracies in this technique, including the contribution of Ca and Ar ions to spectral baselines and the impact of plasma conditions on analytical biases. Experimental data and a release and diffusion model (RDM) suggest that a nearly complete release of boron from aerosol samples is necessary for consistently accurate measurement results without corrections.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Article
Environmental Sciences
Carlos Yure B. Oliveira, Barbara de Cassia S. Brandao, Luiz Gustavo de S. Jannuzzi, Deyvid Willame S. Oliveira, Gilvan Takeshi Yogui, Marius N. Mueller, Alfredo O. Galvez
Summary: This study explores how endosymbiotic dinoflagellates are affected by concentration and source of nitrogen. The results show that high nitrogen concentrations promote dinoflagellate growth, while the uptake of urea can alleviate the impact of thermal stress on the dinoflagellates, thus mitigating coral bleaching events.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Multidisciplinary Sciences
Jan Fietzke, Marlene Wall
Summary: Coral calcification is a complex process influenced by environmental conditions. The chemical composition of coral skeletons provides insights into the control exerted by the organism and the environment. This study found that there are differences in calcification control at different stages of skeleton formation in the cold-water coral Lophelia pertusa.
Correction
Multidisciplinary Sciences
Mario Lebrato, Dieter Garbe-Schonberg, Marius N. Muller, Sonia Blanco-Ameijeiras, Richard A. Feely, Laura Lorenzoni, Juan -Carlos Molinero, Karen Bremer, Daniel O. B. Jones, Debora Iglesias-Rodriguez, Dana Greeley, Miles D. Lamare, Aurelien Paulmier, Michelle Graco, Joan Cartes, Joana Barcelos e Ramos, Ana de Lara, Ricardo Sanchez-Leal, Paz Jimenez, Flavio E. Paparazzo, Susan E. Hartman, Ulrike Westernstroer, Marie Kuter, Roberto Benavides, Armindo F. da Silva, Steven Bell, Chris Payne, Solveig Olafsdottir, Kelly Robinson, Liisa M. Jantunen, Alexander Korablev, Richard J. Webster, Elizabeth M. Jones, Olivier Gilg, Pascal Bailly du Bois, Jacek Beldowski, Carin Ashjian, Nejib D. Yahia, Benjamin Twining, Xue-Gang Chen, Li-Chun Tseng, Jiang-Shiou Hwang, Hans-Uwe Dahms, Andreas Oschlies
Summary: The study found that seawater Sr:Ca values were systematically low due to normalization to IAPSO composition and the largest contribution to expanded uncertainty came from the uncertainty of the IAPSO reference composition. Additional factors should be considered to improve the accuracy of the data.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Xinze Lu, Geoffrey J. Gilleaudeau, Brian Kendall
Summary: The Late Ordovician mass extinction is the first major extinction event in the Phanerozoic, but the reasons for the decline in global biodiversity before the extinction are not well understood.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
Article
Geochemistry & Geophysics
Junyao Kang, Daniel D. Gregory, Benjamin Gill, Shiqiang Huang, Changxin Lai, Zhaoshan Chang, Huan Cui, Ivan Belousov, Shuhai Xiao
Summary: Sedimentary pyrite is an important geological archive, but it can be altered by diagenetic and hydrothermal processes. This study successfully trained machine learning algorithms to distinguish pyrite origins using trace element data. The approach was validated and applied to identify the origins of pyrite in two sedimentary successions in South China.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
