Article
Environmental Sciences
Netramani Sagar, Aleksey Sadekov, Peter Scott, Talia Jenner, Ashiwin Vadiveloo, Navid R. Moheimani, Malcolm McCulloch
Summary: This study explores the use of Amphisorus hemprichii as a biogeochemical archive for monitoring lead pollution in coastal waters. Through laboratory experiments, it was found that the lead concentration in cultured foraminifera tests is proportional to seawater lead concentration, providing a method for quantitatively monitoring anthropogenic lead pollution in coastal waters.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Shai Oron, Aleksey Sadekov, Timor Katz, Beverly Goodman-Tchernov
Summary: Geochemical analysis of recent benthic foraminifera shells can serve as a powerful monitoring tool of bioavailable contaminants in seawater. The study also highlights the need for heavy metal monitoring near marine aquaculture facilities, and suggests that long-term effects extend spatially and temporally far beyond the original point source. Observations of variations in micro-distribution of elements within the shells are relevant for studies conducting single chamber analyses.
MARINE POLLUTION BULLETIN
(2021)
Article
Geosciences, Multidisciplinary
Werner E. Piller, Gerald Auer, Hugo Graber, Martin Gross
Summary: This study explores the Middle Miocene transgression over Mesozoic basement in Bad Deutsch-Altenburg area of Lower Austria, focusing on sediment composition, biostratigraphy, and paleoenvironment to reconstruct the paleotopography and sediment distribution.
SWISS JOURNAL OF GEOSCIENCES
(2022)
Article
Geology
Alin Oprisa, George Ples, Lorand Silye, Ioan I. Bucur, Emanoil Sasaran, Cristian Mircescu
Summary: The study conducted comprehensive analyses on a lowermost Cretaceous carbonate succession, revealing valuable information about benthic foraminiferal assemblages and microfacies. The results contribute to a better understanding of Neotethyan biostratigraphy and depositional paleoenvironments in the Getic Carbonate Platform through multivariate statistical approaches.
CRETACEOUS RESEARCH
(2021)
Article
Multidisciplinary Sciences
Anwar Qadir, Khurram Shahzad, Mehran Khan, Waqar Ahmad
Summary: This study examines the controls on porosity and permeability development of the Middle Eocene Pirkoh Member in the Eastern Tethys. Petrographic studies reveal three microfacies and diagenetic events including cementation, compaction, dolomitization, fracture filling, and neomorphism. The subsurface core indicates a low to high porosity range of 6% to 27.47% and a low to fair permeability range of 0.03 mD to 7.73 mD, closely related to microfacies and diagenetic modifications.
KUWAIT JOURNAL OF SCIENCE
(2023)
Article
Marine & Freshwater Biology
Gaby E. Carpenter, Vianney Denis, Tung-Yung Fan, Steve S. Doo
Summary: This study investigated the response of Calcarina gaudichaudii, an LBF from the Penghu Islands, Taiwan, to heat stress under laboratory conditions, revealing the complex interactions of thermal history, acclimatization temperature, and heat stress on the physiological status of the organism. Results highlight the plastic responses of the algal microbiome and emphasize the importance of considering thermal history in understanding how ecosystem processes are altered on modern coral reefs.
Article
Geology
Felix Schlagintweit, Blanka Cvetko Tesovic, Maja Martinus, Igor Vlahovic
Summary: Four new species of larger benthic foraminifera are described from lower-middle Campanian inner-platform carbonates of the island of Brac, Croatia. The new taxa provide further evidence for the pronounced Campanian diversification within the Late Cretaceous Global Maturation Cycle of larger benthic foraminifera in the inner platform facies of the Mediterranean Adriatic Carbonate Platform.
CRETACEOUS RESEARCH
(2023)
Article
Paleontology
Malcolm B. Hart, Jodie K. Fisher, Christopher W. Smart, Rebecca Speers, Deborah Wall-Palmer
Summary: This study analyzed benthic foraminifera in shallow waters near Montserrat, using core samples from four sites. The findings show that the deposition of volcanic ash has affected the process of seafloor recolonization, with different colonization patterns and species diversity observed in different locations.
Article
Geosciences, Multidisciplinary
Hagar Hauzer, David Evans, Wolfgang Mueller, Yair Rosenthal, Jonathan Erez
Summary: Experimental results show that the ratio of sodium to calcium in foraminifera shells changes slightly with salinity, but this change is small compared to variations in seawater calcium concentrations. Therefore, Na/Ca-shell may not be a suitable proxy for paleo-salinity.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geology
Liu ShiYu, Liu YuPing, Ye Lin, Wang DaPeng
Summary: The Dulong Sn-Zn polymetallic deposit in southeastern Yunnan Province is a super-large deposit with high production of tin and zinc along with various by-products. Studies indicate a genetic relationship between the deposit's mineralization and the Late Yanshanian magmatic activity, but the exhalative sedimentary origin of the deposit is still debated. LA-ICPMS analysis of pyrite in the deposit shows significant differences in trace element compositions among different types.
ACTA PETROLOGICA SINICA
(2021)
Article
Oceanography
C. Fontanier, B. Deflandre, S. Rigaud, B. Mamo, N. Dubosq, B. Lamarque, D. Langlet, S. Schmidt, P. Lebleu, D. Poirier, M. A. Cordier, A. Gremare
Summary: Live (Rose Bengal stained) shelf foraminiferal faunas along the West-Gironde Mud Patch (WGMP) in the Bay of Biscay, NE Atlantic were studied to understand the ecological patterns controlled by complex environmental conditions.
CONTINENTAL SHELF RESEARCH
(2022)
Article
Paleontology
M. Caratelli, F. Archuby
Summary: A morphogroup analysis of the foraminiferal assemblages from the Agua de la Mula Member of the Agrio Formation in Argentina revealed six associations based on benthic foraminiferal morphogroups. These associations were evaluated in relation to geographic localities, ammonite biozones, sedimentary facies, and depositional sequences. The distribution of morphogroups was found to be influenced by sedimentation rates and food availability, showing differences between proximal and distal sectors.
MARINE MICROPALEONTOLOGY
(2023)
Article
Paleontology
Katharina Billups, Patricia Pinheiro Beck Eichler, Christina Ravelo, Luzia Liniane do Nascimento, Helenice Vital, Moab Praxedes Gomes
Summary: Our study examines the stable isotopic composition of benthic foraminifera species from the Acu Reef, finding that their variability is not associated with site location, sampling season, or water depth. The correlation between delta C-13 and delta O-18 values suggests different calcification pathways between symbiont-bearing and symbiont-barren species. These findings have implications for using benthic foraminifera as paleoenvironmental tracers.
JOURNAL OF FORAMINIFERAL RESEARCH
(2022)
Article
Geography, Physical
Marcia Caruso Bicego, Felipe Rodrigues Santos, Poliana Carvalho de Aandrade Furlan, Rafael Andre Lourenco, Satie Taniguchi, Silvia Helena de Mello E. Sousa, Renata Hanae Nagai, Ana Beatriz Leite Cavalcante, Rubens Cesar Lopes Figueira, Ilana Klein Coaracy Wainer, Michel Michaelovitch de Mahiques
Summary: A combination of sedimentological, molecular, and microfossil proxies was used to study paleoclimatic and paleoceanographic variations along the last 6300 years in the southwestern Atlantic Ocean. The analysis showed the influence of the La Plata River plume on the southwestern Atlantic shelf, with variations in marine productivity, lipid biomarkers, and sea-surface temperature pointing to three distinct phases within the core. The study revealed dry climatic conditions, transition periods, and modern establishment of the La Plata River plume influence on the core site.
Article
Ecology
Ana M. Chara-Serna, Andrew Casper
Summary: Recent evidence shows that in physically-dominated ecosystems like large rivers, zooplankton can form spatially structured assemblages and play functionally important roles, with various factors influencing their distribution patterns in a complex manner. In the Illinois River, zooplankton communities are influenced by a combination of biological, chemical, and hydraulic factors, with invasive species impacting density and taxonomic richness. This highlights the complexity of zooplankton distribution in large river systems and the need for long-term monitoring programs.
FRESHWATER BIOLOGY
(2021)
Article
Archaeology
Qiong Li, Alessia Nava, Linda M. Reynard, Matthew Thirlwall, Luca Bondioli, Wolfgang Mueller
Summary: Dental enamel provides valuable information about an individual's early life, and isotopic and trace element ratios have been used to study dietary and weaning histories. This study analyzed the enamel of three Italian infants from the early twentieth century, and found that both Ca-isotopes and trace element ratios can provide insights into breastfeeding and formula feeding patterns. However, Ca-isotope data alone are not sufficient to distinguish between breastfed or formula-fed infants.
ENVIRONMENTAL ARCHAEOLOGY
(2022)
Article
Multidisciplinary Sciences
Nina Kowalik, Robert Anczkiewicz, Jaroslaw Wilczynski, Piotr Wojtal, Wolfgang Mueller, Luca Bondioli, Alessia Nava, Mihaly Gasparik
SCIENTIFIC REPORTS
(2020)
Article
Environmental Sciences
Shai Oron, David Evans, Sigal Abramovich, Ahuva Almogi-Labin, Jonathan Erez
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2020)
Article
Geosciences, Multidisciplinary
David Evans
Summary: The mid Miocene period provides an important target for paleoclimatic study due to the presence of a large Antarctic ice sheet alongside CO2 concentrations similar to or higher than present levels. Recent developments in geochemical proxies and ice sheet modeling have allowed for the exploration of potential paradoxes in climate research. The use of robust proxies with a well-understood basis, combined with improvements in model-data comparability, has opened up new avenues for understanding Earth's past climate states.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Multidisciplinary Sciences
Nicolai Schleinkofer, Jacek Raddatz, David Evans, Axel Gerdes, Sascha Floegel, Silke Voigt, Janina Vanessa Buescher, Max Wisshak
Summary: Acesta excavata, a slow-growing bivalve from the Limidae family, shows compositional variability in elemental ratios, indicating strong vital effects and associations with seawater temperature and salinity. Additional techniques, such as clumped isotopes, are recommended to accurately determine and quantify these effects.
Article
Geosciences, Multidisciplinary
H. L. O. McClelland, I Halevy, D. A. Wolf-Gladrow, D. Evans, A. S. Bradley
Summary: This paper introduces a simple, robust, and generalizable method for quantifying uncertainty in proxy reconstructions, highlighting the primary controls on the magnitude of uncertainty. The discussion includes possible ways to reduce uncertainties and emphasizes the necessity of incorporating unexplained variance in the calibration into the reconstruction's uncertainty.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Hagar Hauzer, David Evans, Wolfgang Mueller, Yair Rosenthal, Jonathan Erez
Summary: Experimental results show that the ratio of sodium to calcium in foraminifera shells changes slightly with salinity, but this change is small compared to variations in seawater calcium concentrations. Therefore, Na/Ca-shell may not be a suitable proxy for paleo-salinity.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geochemistry & Geophysics
A. Arns, D. Evans, R. Schiebel, L. Fink, M. Mezger, E. Alig, J. Linckens, K. P. Jochum, M. U. Schmidt, A. Jantschke, G. H. Haug
Summary: Calcareous foraminiferal shells are important archives for paleoenvironmental and paleoclimatic reconstruction. This study examines the crystallographic and hierarchical structure of the test wall of different foraminifer species using microscopic and diffraction-based methods. The results suggest that the tests are made up of micrometer-scale oriented mesocrystals built from nanometer-scale entities. The study proposes a mechanistic extension to the biomineralization model, emphasizing the formation and assembly of metastable carbonate phases to the final mesocrystal via a non-classical particle attachment process, possibly facilitated by organic matter. This has implications for understanding proxy incorporation in foraminifers.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geochemistry & Geophysics
Romi Nambiar, Hagar Hauzer, William R. Gray, Michael J. Henehan, Laura Cotton, Jonathan Erez, Yair Rosenthal, Willem Renema, Wolfgang Mueller, David Evans
Summary: Seawater chemistry plays a crucial role in the incorporation of trace elements into marine calcifying organisms' shells. Variations in seawater's major ion chemistry can be used to trace past geological processes. This study examines the influence of oceanographic parameters on the incorporation of potassium into foraminiferal calcite, and explores the potential of using K/Ca ratios as indicators of past changes in seawater composition. The results show that temperature, salinity, and pH have no significant effect on K incorporation, but seawater's calcium concentration does.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
William R. Gray, David Evans, Michael Henehan, Syee Weldeab, David W. Lea, Wolfgang Mueller, Yair Rosenthal
Summary: The incorporation of sodium into the shells of foraminifera is still not well understood, and ongoing debates surround its location in the calcite crystal lattice and its potential complexation with organics. This study presents new measurements of sodium to calcium ratio (Na/Ca) in planktonic foraminifera using different analytical techniques, revealing elevated Na/Ca values measured by laser ablation ICP-MS compared to solution ICP-MS. The results suggest that Na is incorporated in at least two phases, with one primary phase within the CaCO3 mineral and one or multiple secondary phases likely contributing to the observed Na/Ca-salinity relationship.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Iris Arndt, Douglas Coenen, David Evans, Willem Renema, Wolfgang Mueller
Summary: The geochemical composition of giant clam shells can provide records of past environmental conditions, and their growth bands can serve as a proxy for daily and seasonal increments. However, visually identifying daily growth bands in fossil specimens can be challenging. In this study, the authors demonstrate that highly spatially resolved laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS) can be used to resolve daily geochemical cycles, even in areas where daily banding is not visually discernible. By quantifying varying daily growth rates, an independent internal age model can be built, which helps evaluate paleoenvironmental proxy data and investigate the timing of sub-seasonal events.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
T. Klein, G. Zulauf, D. Evans, A. Gerdes, J. Glodny, F. Heidelbach, F. Kirst, J. Linckens, W. Mueller, E. oezcan, R. Petschick, P. Xypolias
Summary: In this study, various data including kinematic, radiometric, geochemical, and PT data are used to constrain the tectonometamorphic evolution of the Tripolitza Unit (TPU). The age of the metamorphic peak and thrusting events is constrained using Rb-Sr and U-Pb dating methods. The results reveal early tectonic events and late diagenesis in the TPU, as well as anticlockwise rotation of the shortening direction. The findings have significant implications for the geodynamic evolution of the External Hellenides.
GEOLOGICAL MAGAZINE
(2023)
Article
Ecology
Nicolai Schleinkofer, David Evans, Max Wisshak, Janina Vanessa Buscher, Jens Fiebig, Andre Freiwald, Sven Harter, Horst R. Marschall, Silke Voigt, Jacek Raddatz
Summary: The geochemical signature of Hyrrokkin sarcophaga depends on the host organism it infests, with different hosts leading to different geological signals. Therefore, using its geochemical information to accurately reflect paleoenvironmental conditions requires consideration of its host information.
Article
Chemistry, Analytical
David Evans, Axel Gerdes, Douglas Coenen, Horst R. Marschall, Wolfgang Mueller
Summary: The study showcases a precise and accurate method for measuring boron isotopic composition in natural samples, offering valuable information about formation environments and crystallization mechanisms. Building multi-standard calibration lines to correct for interferences facilitates accurate and precise spatially-resolved delta B-11 measurements across a variety of sample matrices.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Multidisciplinary Sciences
Alessiaa Nava, Federico Lugl, Matteo Romandini, Federica Badino, David Evans, Angela H. Helbling, Gregorio Oxilia, Simona Arrighi, Eugenio Bortolini, Davide Delpiano, Rossella Duches, Carla Figus, Alessandra Livraghi, Giulia Marciani, Sara Silvestrini, Anna Cipriani, Tommaso Giovanardi, Roberta Pini, Claudio Tuniz, Federico Bernardini, Irene Dori, Alfredo Coppa, Emanuela Cristiani, Christopher Dean, Luca Bondioli, Marco Peresani, Wolfgang Mueller, Stefano Benazzi
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Chemistry, Analytical
Michelle Buoso, Beatrice Campanella, Massimo Onor, Emanuela Pitzalis, Alessandro D'Ulivo
Summary: The use of BH intermediates as derivatization reagents significantly improves the tolerance to interference from transition metal ions in the generation of SbH3 and BiH3, and shows high tolerance in a wide range of acidity. The method has been successfully applied to the determination of Sb and Bi in complex samples, providing further understanding of the chemical behavior of borohydrides.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
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, Analytical
Ivan B. Krstic, Bratislav M. Obradovic, Milorad M. Kuraica
Summary: This paper presents the spatio-temporal dynamics of a Grimm-type microsecond pulsed glow discharge (mu PGD) in argon at 6 mbar. The occurrence of a high current peak during the discharge ignition is analyzed and the importance of displacement current is emphasized. The development of electron excitation temperature for argon atoms and ions at various distances from the cathode is measured. The spatio-temporal evolution of selected spectral lines of argon and copper atoms and ions is analyzed during different phases of the discharge. The results suggest that the behavior of spectral line emissions differs between the pre-peak and afterglow periods, with different lines reaching maximum intensity during these phases. The appearance time and decay time of the afterpeak are shorter for ions than for atoms. These findings are explained in terms of three-body recombination processes and ion mobilities.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Qiuyun Wang, Anmin Chen, Xun Gao
Summary: In this paper, the combination of Tesla coil discharge (TCD) and laser-induced breakdown spectroscopy (LIBS) was used to enhance the emission of Al atomic lines and AlO molecular bands. The optimized distance between the TCD tip and the sample surface was found to be 5 mm, and the optimal laser energy was 25.1 mJ. Furthermore, TCD-SELIBS showed lower limits of detection (LoDs) for Cr and Pb elements compared to surface enhanced LIBS (SELIBS). The combination of TCD and LIBS is a promising technology for high-sensitivity analysis of heavy metals in water, with the advantages of simplicity, low cost, ease of operation, industrialization, and commercialization.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Yanwen Tang, Tingguang Lan, Jianfeng Gao, Zhongjie Bai, Xiaowen Huang, Junjie Han, Na Liu
Summary: Titanium is an important metal widely used in various industries. Ilmenite minerals are the main source of titanium metal and can be found in igneous and metamorphic rocks as well as different types of deposits. To accurately determine U-Pb ages of ilmenite, a new calibration method and appropriate reference materials are urgently needed. Laser ablation sector field inductively coupled plasma mass spectrometry has been used to minimize matrix effects and zircon 91500 has been identified as a suitable reference material for measuring the Pb/U ratio in ilmenite. The direct calibration method using zircon 91500 as an external standard has been found to be effective for in situ U-Pb dating of ilmenite samples under different ablation settings.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)