Article
Engineering, Marine
Pavel Mikhailik, Irina Vishnevskaya, Liang Yi, Natalia Soloshenko, Vadim Pellinen
Summary: This study investigates the isotopic compositions of neodymium and strontium in mineral fractions of the hydrogenous ferromanganese crusts in the northernmost Pacific. The analysis reveals the relationship between the isotopic ratios and the sources of detrital matter. Additionally, the study finds differences in the neodymium isotopic compositions between the manganese and ferrous fractions.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Analytical
Sourav Das, Brent Miller, Joseph Prospero, Shankararaman Chellam
Summary: This article presents a new chemical separation protocol for isotopic analysis of low mass aliquots of airborne particulate matter. The protocol achieves successful separation and accurate quantification of several reference materials and real-world samples. The method is optimized to isolate individual anthropogenic and natural aerosol sources in complex atmospheric environments. In addition, the method is used to measure isotopic ratios and elemental abundances in different urban PM sources, demonstrating the superiority of isotopic markers over elemental tracers.
Article
Geochemistry & Geophysics
Tim Jesper Suhrhoff, Joerg Rickli, Marcus Christl, Elena G. Vologina, Viet Pham, Moustafa Belhadj, Eugene V. Sklyarov, Catherine Jeandel, Derek Vance
Summary: This study provides a detailed analysis of weathering fluxes at Lake Baikal and evaluates the potential of lake records for understanding denudation and weathering processes. The results show that the denudation rates at Lake Baikal are significantly lower than the global average, while the chemical weathering rates are comparable to global values. The variation in denudation rates between the north and south of the catchment may be attributed to the stabilizing effect of permafrost soils. The study also reveals significant differences in trace element concentrations between the lake and inflowing rivers, suggesting the role of pH-induced changes and the formation of authigenic Fe-Mn (oxyhydr)oxide phases in trace element removal. The isotopic composition of strontium is uniform within the lake, indicating rapid mixing, while neodymium and beryllium show isotopic variability between the basins.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Yi Yang, James A. Bendle, Richard D. Pancost, Yan Yan, Xiaoyan Ruan, Bridget Warren, Xiaoxia Lu, Xuejie Li, Yongjian Yao, Xianyu Huang, Huan Yang, Shucheng Xie
Summary: Recent studies have found abnormally high chlorophyll-a concentrations and primary productivity in the oligotrophic central South China Sea during wintertime, possibly due to inputs from higher latitude soils in northern China. The winter monsoon may transport aeolian dust to fertilize phytoplankton bloom in the central SCS.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Jin-Feng Sun, Jin-Hui Yang, Ji-Heng Zhang, Yue-Heng Yang, Yu-Sheng Zhu
Summary: Apatite geochemical and Sr-Nd isotopic compositions are powerful tools for studying the source and evolution of magma, providing evidence for the origin of granitoids. The distinct occurrences, geochemical features, and isotopic compositions of apatite grains in Early Cretaceous granite from northeastern China suggest different origins and processes.
Article
Geochemistry & Geophysics
Zhi-Kun Su, Xin-Fu Zhao, Christina Yan Wang, Zhi-Min Zhu, Wen-Lei Song, Carl Spandler
Summary: This study provides robust evidence for the survival of whole-rock Sm-Nd isotopes in the presence of multistage hydrothermal alteration. The Lala Fe-Cu-REE deposit in southwestern China is host to a variety of REE-rich minerals that underwent extensive metasomatic alteration. The results show that despite resetting of major REE minerals, the whole-rock Sm-Nd isotopic system remained closed.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geosciences, Multidisciplinary
Xi Zeng, Xiaochun Li, Hongrui Fan, Tingguang Lan, Jun Lan, Jianhui Su, Peng Zhang, Kuifeng Yang, Xinfu Zhao
Summary: This paper investigates the Sr-Nd-O isotopic study on the Weishan REE-rich syenite-(carbonatite) complex in Northern China, revealing that the rock was sourced from the asthenosphere and highlighting the importance of lithosphere-asthenosphere interaction in the formation of the complex.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Hyo Min Lee, Seung-Gu Lee, Hyeoncheol Kim, Jong Ik Lee, Mi Jung Lee
Summary: The Pirrit Hills granite in West Antarctica demonstrates distinct geochemical features and isotopic ratios indicating magmatic differentiation processes, formed by the remelting of Mesoproterozoic mantle-derived crustal materials.
Article
Geosciences, Multidisciplinary
Zhiheng Du, Jiao Yang, Lei Wang, Ninglian Wang, Anders Svensson, Zhen Zhang, Xiangyu Ma, Yaping Liu, Shimeng Wang, Jianzhong Xu, Cunde Xiao
Summary: The radiogenic isotope compositions of strontium and neodymium on the Earth's surface can help trace dust sources and sinks. A database of Sr-Nd isotopic compositions from extremely cold or arid terrestrial environments was compiled to study the spatial variabilities in eolian dust sources in key cryospheric regions. This dataset provides detailed information on the sources and transport pathways of dust in snow, ice, rivers, and oceans at or near the three poles.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Geochemistry & Geophysics
Irina Nedosekova, Nikolay Vladykin, Oksana Udoratina, Boris Belyatsky
Summary: The Ilmeno-Vishnevogorsk (IVC), Buldym, and Chetlassky carbonatite complexes in the folded regions of the Urals and Timan exhibit distinct geochemical signatures and ore specializations, suggesting varying mantle sources enriched in different components. The ore specialization of these complexes may be influenced by both crustal evolution and the heterogeneity of their mantle sources.
Article
Engineering, Environmental
Ting Wei, Janice Brahney, Zhiwen Dong, Shichang Kang, Chunlei Zong, Junming Guo, Ling Yang, Xiang Qin
Summary: The isotopic compositions of Hf-Nd-Sr in TP soils show unique spatial signatures controlled by four geographic isotope regions. TP is an important dust source to eastern TP glaciers, the Chinese Loess Plateau, South China Sea, Japan, and Greenland. This study provides clear isotopic evidence that TP is a major aeolian contributor in the Northern Hemisphere with important implications for the global aeolian cycle.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
E. Bruand, C. Storey, M. Fowler, B. Dhuime, R. Doucelance
Summary: It is well-established that lanthanide rare earth elements (REEs) have the potential to record the nature and source characteristics of their host magmas, in both whole-rock and their minerals. This study focused on the multi-isotope analysis of titanite, zircon and apatite from high Ba-Sr granitoids in Northwest Scotland, revealing compatible isotopic systems and providing insight into the overall, mineral, and rock isotopic characteristics of the region. The study demonstrates that magmatic titanite and apatite, in addition to zircons, can provide detailed petrogenetic records, and suggests that integrated multi-mineral approaches have the potential to maximize constraints from in-situ mineral isotope geochemistry.
Article
Geochemistry & Geophysics
Qingshang Shi, Yongsheng He, Zhidan Zhao, Dong Liu, Nigel Harris, Di-Cheng Zhu
Summary: The study presents Fe isotopic data of Himalayan leucogranites to investigate their petrogenesis, suggesting that they are likely formed from partial melting of the crust rather than high degree of fractional crystallization. The elevated Fe isotopic values in most leucogranites compared to the supposed source rocks indicate possible Fe isotope fractionation during crustal anatexis. This study provides insights into the conditions of crustal anatexis and the thermal and tectonic evolution of the Himalayan orogen.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Environmental
Sourav Das, Brent V. Miller, Joseph M. Prospero, Cassandra J. Gaston, Haley M. Royer, Edmund Blades, Peter Sealy, Shankararaman Chellam
Summary: Tracking Saharan-Sahelian dust using radiogenic isotopes has been found effective in differentiating and quantifying sources even in complex urban atmospheres, providing a promising avenue for source apportionment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Xiao-Chun Li, Daniel E. Harlov, Mei-Fu Zhou, Hao Hu
Summary: A series of fluid/apatite reaction experiments were conducted to understand the effect of fluid-induced alteration on the Sm-Nd isotope system in apatite. The experimental results showed that fluid chemistry is the main factor controlling the response of the Sm-Nd isotopic system to fluid-induced alteration. When the fluids are rich in ligands that can facilitate REE mobilization and fractionation, the Sm-147/Nd-144 ratio of apatite can be highly modified, indicating the importance of evaluating the fluid-rock history and chemistry before using apatite Sm-Nd isotopes as geological indicators.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Limnology
Catarina Guerreiro, Karl-Heinz Baumann, Geert-Jan A. Brummer, Andre Valente, Gerhard Fischer, Patrizia Ziveri, Vanda Brotas, Jan-Berend W. Stuut
Summary: Coccolithophores play a significant role in the biological carbon pump. Different species of coccolithophores at different sites show variations in coccolith-carbonate flux, influenced by environmental factors such as nutrient availability and temperature. The study suggests that changes in productivity in response to ocean warming may affect the efficiency of the biological carbon pump.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Geography, Physical
Michelle van der Does, Marc Wengler, Frank Lamy, Alfredo Martinez-Garcia, Samuel L. Jaccard, Gerhard Kuhn, Verena Lanny, Jan-Berend W. Stuut, Gisela Winckler
Summary: Research on downcore sediment grain-size records of mineral dust in the open Southern Ocean reveals opposite trends in dust grain sizes between the South Atlantic and the South Pacific sectors, likely due to different responses to glacial conditions in their sources and changing wind and transport patterns. This suggests that further studies of wind-blown sediment properties in the Southern Ocean can provide important insights into climatic changes in the sources and variations of transport by the westerly winds.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Meteorology & Atmospheric Sciences
Michelle van der Does, Geert-Jan A. Brummer, Laura F. Korte, Jan-Berend W. Stuut
Summary: Research shows that Saharan dust from North Africa affects the climate and carbon cycle of the North Atlantic Ocean, with particles deposited on the seafloor exhibiting similar characteristics to atmospheric dust, increased wet deposition in summer and/or autumn.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Geochemistry & Geophysics
Ziyi Zhu, Ian H. Campbell, Charlotte M. Allen, Jochen J. Brocks, Bei Chen
Summary: The distribution of low-Lu and low-Lu/Dy zircons can be used to identify periods of extensive high mountain formation. Earth has two supermountains, formed during periods of high metamorphic pressure in orogenic belts. These supermountains are associated with voluminous sedimentation, enhanced erosion, and potential impacts on biotic events and atmospheric oxygen levels.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Multidisciplinary Sciences
Marie Catherine Sforna, Corentin C. Loron, Catherine F. Demoulin, Camille Francois, Yohan Cornet, Yannick J. Lara, Daniel Grolimund, Dario Ferreira Sanchez, Kadda Medjoubi, Andrea Somogyi, Ahmed Addad, Alexandre Fadel, Philippe Compere, Daniel Baudet, Jochen J. Brocks, Emmanuelle J. Javaux
Summary: This study reports a new integrative methodology using synchrotron-based X-ray fluorescence and absorption to identify chlorophyll derivatives preserved in rocks from multicellular eukaryotes dating back to approximately 1 billion years ago. This discovery provides new insights into the evolution of photosynthesis and the diversification of early ecosystems.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
Christopher W. Kinsley, Louisa Bradtmiller, David McGee, Michael Galgay, Jan-Berend Stuut, Rik Tjallingii, Gisela Winckler, Peter B. DeMenocal
Summary: Reconstructions of aeolian dust flux to West African margin sediments can be used to explore changing atmospheric circulation and hydroclimate over North Africa on millennial to orbital timescales. The study found that there was a Green Sahara period during 60-50 ka when the dust flux was similar to levels during the early Holocene African Humid Period. Additionally, during the Last Glacial Maximum, dust deposition decreased and showed little response to low-latitude insolation changes.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Environmental Sciences
Louis Peperzak, Jan-Berend Willem Stuut, Hendrik Jan van der Woerd
Summary: Filtration is an important step in water treatment to remove suspended matter. However, it also generates smaller particles that increase UV absorption and may reduce disinfection performance.
MARINE POLLUTION BULLETIN
(2022)
Article
Biology
Madison Tripp, Jasmina Wiemann, Jochen Brocks, Paul Mayer, Lorenz Schwark, Kliti Grice
Summary: Coprolites (fossilised faeces) can provide insights into extinct animal diets through the analysis of preserved biomarkers and macromolecular biosignatures. In this study, Carboniferous coprolites were found to indicate a likely carnivorous diet based on the abundance of cholesteroids and the statistical analysis of in situ Raman spectra. The exceptional preservation of biomolecular information in these coprolites was facilitated by siderite concretions.
Article
Biochemistry & Molecular Biology
Ilya Bobrovskiy, Alexey Nagovitsyn, Janet M. Hope, Ekaterina Luzhnaya, Jochen J. Brocks
Summary: This article examines the gut contents of Ediacaran animals and reveals their diet strategies, as well as some physiological characteristics of these early animals.
Review
Geography, Physical
Adeyemi Adebiyi, Jasper F. Kok, Benjamin J. Murray, Claire L. Ryder, Jan-Berend W. Stuut, Ralph A. Kahn, Peter Knippertz, Paola Formenti, Natalie M. Mahowald, Carlos Perez Garcia-Pando, Martina Klose, Albert Ansmann, Bjorn H. Samset, Akinori Ito, Yves Balkanski, Claudia Di Biagio, Manolis N. Romanias, Yue Huang, Jun Meng
Summary: Mineral dust particles with a wide range of diameters, from <0.1 μm to >100 μm, have unique interactions with various aspects of the Earth system. Coarse and supercoarse dust aerosols, defined as particles with diameters of 2.5-10 μm and 10-62.5 μm, have been found to be transported farther and more abundant than previously thought. These aerosols have significant impacts on dust-radiation interactions, dust-cloud interactions, atmospheric chemistry, and biogeochemistry. Recommendations have been made to improve the representation of coarse and supercoarse dust aerosols in models and remote sensing retrievals. Accurate representation of these aerosols is critical for understanding their impacts on the Earth system.
Article
Multidisciplinary Sciences
Jochen J. Brocks, Benjamin J. Nettersheim, Pierre Adam, Philippe Schaeffer, Amber J. M. Jarrett, Nur Guneli, Tharika Liyanage, Lennart M. van Maldegem, Christian Hallmann, Janet M. M. Hope
Summary: The origin of life on Earth occurred relatively late, as evidenced by the scarcity of eukaryotic fossils and molecular fossils of eukaryotic membrane sterols in early sedimentary rocks. However, abundant protosteroids have been discovered in mid-Proterozoic age rocks, indicating the existence of a widespread and abundant 'protosterol biota' in ancient aquatic environments. This suggests the presence of ancient protosterol-producing bacteria and deep-branching stem-group eukaryotes. Modern eukaryotes emerged during the Tonian period, around 800 million years ago, marking a significant ecological turning point in Earth's history.
Editorial Material
Multidisciplinary Sciences
Jochen Brocks, Ilya Bobrovskiy
Article
Environmental Sciences
Catarina V. V. Guerreiro, Afonso Ferreira, Lluisa Cros, Jan-Berend Stuut, Alex Baker, Andreia Tracana, Catarina Pinto, Vera Veloso, Andrew P. Rees, Mario A. P. Cachao, Telmo Nunes, Vanda Brotas
Summary: This study investigates the impact of ocean warming on coccolithophore productivity and the role of oceanographic and atmospheric processes in shaping their distribution. The results show that meridional hydrological gradients are the dominant factor influencing coccolithophore communities, with higher latitudes having less diverse populations compared to subtropical gyres. Additionally, Saharan dust deposition increases nutrient input and enhances algal growth in specific regions.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Ecology
Yosuke Hoshino, Benjamin J. Nettersheim, David A. Gold, Christian Hallmann, Galina Vinnichenko, Lennart M. van Maldegem, Caleb Bishop, Jochen J. Brocks, Eric A. Gaucher
Summary: The study re-establishes the importance of 2-methylhopanes as cyanobacterial biomarkers and their role in primary production before 750 million years ago. By examining the distribution of the HpnP gene, the authors clarify the relationship between hopanoid-producing bacteria, cyanobacteria, and eukaryotic algae. This study highlights the significance of genetics in improving the interpretation of ancient ecosystems.
NATURE ECOLOGY & EVOLUTION
(2023)
Correction
Limnology
L. F. Korte, G. -J. A. Brummer, M. van der Does, Catarina V. Guerreiro, F. Mienis, C. Munday, L. Ponsoni, S. Schouten, J-B W. Stuut
LIMNOLOGY AND OCEANOGRAPHY
(2021)