Review
Geosciences, Multidisciplinary
Tiantian Wang, Jahandar Ramezani, Chuan Yang, Jianghai Yang, Qiong Wu, Zhihui Zhang, Dawei Lv, Chengshan Wang
Summary: Sedimentary rocks are important repositories of Earth history, and the U-Pb radioisotopic system is a precise and accurate method for measuring absolute time. However, its application to the stratigraphic record relies on the presence of relatively pure volcanic ash deposits. Innovations in U-Pb ID-TIMS geochronology have improved precision and reproducibility, but have also revealed complexities in the U-Pb systematics of minerals.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
M. A. Rogov, I. V. Panchenko, L. E. Augland, V. B. Ershova, V. Yu. Yashunsky
Summary: This study provides the first reliable geochronological data from the West Siberia sedimentary basin to determine the age of the Tithonian/Berriasian (T/B) boundary. The dating of zircon grains derived from a tuff bed shows ages between 141.83 and 141.11 Ma, suggesting a re-consideration of the currently accepted age of the T/B boundary.
Article
Geochemistry & Geophysics
Xiao-Xiao Ling, Qiu-Li Li, Magdalena H. Huyskens, Yu Liu, Qing-Zhu Yin, Guo-Qiang Tang, Jiao Li, Hua-Feng Zhang, Sergey G. Skublov, Aleksey E. Melnik, Xian-Hua Li
Summary: Titanite is a uranium-bearing mineral that is useful for dating geological events. This study investigates the matrix effect in SIMS U-Pb dating of titanite and develops a calibration protocol to improve the accuracy of the method, resulting in a more accurate thermal history of the samples.
Article
Geosciences, Multidisciplinary
Yu-Ting Zhong, Zhen-Yu Luo, Roland Mundil, Xun Wei, Hai-Quan Liu, Bin He, Xiao-Long Huang, Wei Tian, Yi-Gang Xu
Summary: This study presents precise age determinations of volcanic activities in the Tarim large igneous province (LIP) in northwestern China, indicating a relatively long duration of eruption in two formations, consistent with a plume incubation model for the Tarim LIP.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geology
Ray K. Renaut, Ryan T. Tucker, M. Ryan King, James L. Crowley, Ethan G. Hyland, Lindsay E. Zanno
Summary: This study utilizes a blended analysis of LA-ICP-MS, CA-TIMS, and d13C isotopic data to identify two regionally significant ash-fall marker beds (TT1 and TT4) southeast of the Wasatch Plateau, which are associated with the Cenomanian-Turonian boundary and the Greenhorn Cycle transgression in the WIS. The depositional ages of TT1 and TT4 are determined to be 94.616 Ma +/- 0.027 and 94.010 Ma +/- 0.017, respectively. These dates have important implications for chronostratigraphic correlation and global events during the Greenhorn Cycle.
CRETACEOUS RESEARCH
(2023)
Article
Multidisciplinary Sciences
Jahandar Ramezani, Tegan L. Beveridge, Raymond R. Rogers, David A. Eberth, Eric M. Roberts
Summary: This study presents a high-resolution chronostratigraphic framework for the Upper Cretaceous terrestrial strata of North America's Western Interior Basin, revealing significant age overlap between key fossil-bearing formations. The results support a connection between paleoecology and fossil diversities, helping to overcome chronostratigraphic ambiguities and test proposed models of latitudinal provinciality of dinosaur taxa during the Campanian.
SCIENTIFIC REPORTS
(2022)
Article
Biotechnology & Applied Microbiology
Yu-Han Yuan, Ling-Xiao Liu, Liang Wang, Gui-Zhi Dong, Yun-Guo Liu
Summary: The rhizosphere soil bacterial community of Rosa rugosa Fenghua, Rosa rugosa cv. Plena and Rosa rugosa Zizhi showed changes in different seasons, mainly composed of Proteobacteria, Acidobacteria, Bacteroidetes, and Actinobacteria.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
A. Sedky, Amna Salah
Summary: A comparative study of La-substituted Ca on (Bi, Pb):2212 and (Bi, Pb):2223 superconductors was conducted, revealing that the 2212 series showed better performance in terms of superconducting volume fraction, hardness and critical fields and currents, while the 2223 series exhibited better performance in terms of orthorhombic distortion, crystallite diameter, doping distance, and plastic deformation.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Computer Science, Information Systems
Tanatorn Faijaroenmongkol, Kanoksri Sarinnapakorn, Peerapon Vateekul
Summary: This research focuses on sub-seasonal to seasonal precipitation forecasting. A deep learning model called Attention U-Net is used, with enhancements such as a multi-scale residual block and a customized loss function. The results show that the proposed model outperforms traditional approaches and the traditional Attention U-Net model in bias correction and forecasting accuracy.
Article
Engineering, Environmental
Zhimeng Su, Zelan Deng, Yazhi Wang, Chen Ji, Fuchun Li, Guoguo Yang, Lingjie Huang
Summary: This study investigated the effect of Sr/Ca ratio on microbially-induced carbonate precipitation and found that a higher Sr/Ca ratio promoted Sr incorporation into minerals. The removal of Sr2+ was positively correlated with mass of CO32- in the mineral. Chemical induction experiments showed that Sr2+ removal was positively correlated with the distribution coefficient of Sr. These findings have reference value for understanding the formation mechanism of carbonate minerals and Sr bioremediation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Geological
Yasutaka Watanabe, Shingo Yokoyama
Summary: This study evaluated the shear characteristics of compacted Ca-bentonite immersed in various solutions, and investigated the mineral composition, mean layer charge, leachable cations, and microstructure. The results showed significant dissolution and precipitation of minerals at high pH levels. The amount of leachable cations increased, and gel-like products composed of Ca and Si were observed. The maximum deviator stress of the specimens increased and decreased as a result of dissolution and precipitation.
SOILS AND FOUNDATIONS
(2022)
Article
Environmental Sciences
Chenchen Qu, Shanshan Yang, Monika Mortimer, Ming Zhang, Jinzhao Chen, Yichao Wu, Wenli Chen, Peng Cai, Qiaoyun Huang
Summary: Bacteria and their secreted EPS have the ability to immobilize heavy metals, and this study reveals the functional diversity and adsorption mechanisms of Pb onto bacteria and EPS in detail. The partitioning of Pb to functional groups differs between bacterial strains, EPS fractions, and Pb concentrations, and the adsorption occurs through a universal entropy increase and inner-sphere complexation mechanism.
ENVIRONMENTAL POLLUTION
(2022)
Article
Microbiology
Jinlong Wang, Chunjuan Wang, Xuefeng Wu, Jinwei Zhang, Guiyun Zhao, Yu Hou, Haiming Sun
Summary: This study investigated the impact of changes in precipitation volume and dry intervals on bacterial co-occurrence networks in grassland ecosystems. The results showed that alterations in precipitation and dry intervals did not significantly affect bacterial diversity, but had a significant effect on the co-occurrence network structure. Prolonged dry intervals were found to reduce the robustness of bacterial networks, and the complexity and stability of the network were primarily influenced by soil water content, phosphorus, and aboveground biomass.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Kai Zhang, Cheng Wang, Da-Wei Wang, Mei-Xuan Li, Yin-Long Ma, Zhen-Ming Hua, Lin-Yang Zhang, Jun Li, Hui-Yuan Wang
Summary: The underlying mechanism of solute redistribution during heat treatment in affecting corrosion behavior of Mg-1.19Al-0.28Ca-0.44Mn (wt%) alloy was systematically clarified. The supersaturated Al and Ca solutes in matrix effectively alleviate the driving force of micro-galvanic corrosion caused by Al-Mn phases, based on positive shift of matrix potential and film densification. After aging treatment, monoatomic-layer G.P. zones realize higher strength and better corrosion resistance of alloy as compared to nanosized Al2Ca, due to higher number density and less solute consumption in matrix.
Article
Geology
Deru Xu, Deshui Yu, Zhilin Wang, Bo Li, Guoxiang Chi, Yueqiang Zhou, Shaohao Zou, Teng Deng, Shengwei Zhang, Xuena Wang
Summary: This study used K-feldspar 40Ar/39Ar dating and zircon U-Pb dating, along with geochemical analysis, to determine the age and nature of Late Jurassic to Early Cretaceous magmatism and related mineralization in the Jiangnan Orogen. The results show that the composite pluton in the region was formed in multiple stages and was responsible for two mineralization events in northeastern Hunan Province.
ORE GEOLOGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Alberto Curcio, Aurore Van de Walle, Aida Serrano, Sandra Preveral, Christine Pechoux, David Pignol, Nicolas Menguy, Christopher T. Lefevre, Ana Espinosa, Claire Wilhelm
Article
Chemistry, Multidisciplinary
Megane Muschi, Anusha Lalitha, Saad Sene, Damien Aureau, Mathieu Fregnaux, Imene Esteve, Lucie Rivier, Naseem Ramsahye, Sabine Devautour-Vinot, Clemence Sicard, Nicolas Menguy, Christian Serre, Guillaume Maurin, Nathalie Steunou
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Physical
Widad Ajili, Guillaume P. Laurent, Nicolas Menguy, Axel Gansmuller, Sylvain Huchette, Stephanie Auzoux-Bordenave, Nadine Nassif, Thierry Azais
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Environmental Sciences
Jinhua Li, Nicolas Menguy, Andrew P. Roberts, Lin Gu, Eric Leroy, Julie Bourgon, Xin'an Yang, Xiang Zhao, Peiyu Liu, Hitesh G. Changela, Yongxin Pan
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2020)
Article
Microbiology
Peiyu Liu, Yan Liu, Xiang Zhao, Andrew P. Roberts, Heng Zhang, Yue Zheng, Fuxian Wang, Lushan Wang, Nicolas Menguy, Yongxin Pan, Jinhua Li
Summary: A large-scale analysis of modern magnetotactic cocci revealed 19 novel species, which cluster into an independent branch within Alphaproteobacteria MTB. Statistical analysis showed species-specific biomineralization of magnetosomal magnetite morphologies, indicating strict control by MTB cells.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Ecology
Caroline L. Monteil, Karim Benzerara, Nicolas Menguy, Cecile C. Bidaud, Emmanuel Michot-Achdjian, Romain Bolzoni, Francois P. Mathon, Margot Coutaud, Beatrice Alonso, Camille Garau, Didier Jezequel, Eric Viollier, Nicolas Ginet, Magali Floriani, Sufal Swaraj, Martin Sachse, Vincent Busigny, Elodie Duprat, Francois Guyot, Christopher T. Lefevre
Summary: Bacteria can synthesize a variety of non-biological precipitates with different chemical compositions and structures within cells, including magnetic particles and calcium carbonate granules. Research has shown that the amorphous calcium carbonate granules formed by these bacteria are contained within membrane-delimited vesicles. Analysis of a new genus of Alphaproteobacteria revealed atypical structure of the magnetosome gene cluster, and the bacteria consume energy to maintain an environment suitable for calcium carbonate granule formation.
Article
Multidisciplinary Sciences
Pierre Lefebvre, Alkiviadis Gourgiotis, Arnaud Mangeret, Pierre Sabatier, Pierre Le Pape, Olivier Diez, Pascale Louvat, Nicolas Menguy, Pauline Merrot, Camille Baya, Mathilde Zebracki, Pascale Blanchart, Emmanuel Malet, Didier Jezequel, Jean-Louis Reyss, John R. Bargar, Jerome Gaillardet, Charlotte Cazala, Guillaume Morin
Summary: The study investigates the evolution of uranium speciation in naturally highly uranium-enriched sediments over a period of 3,300 years. It reveals that mononuclear U(IV) species associated with organic matter transformed into polymeric U(IV)-silica species, which then partially converted to a nanocrystalline coffinite-like phase in less than 700 years. The incomplete transformation observed suggests implications for the long-term management of uranium-contaminated sediments and uranium-bearing wastes in silica-rich subsurface environments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Jinhua Li, Nicolas Menguy, Eric Leroy, Andrew P. Roberts, Peiyu Liu, Yongxin Pan
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Microbiology
Vincent Busigny, Francois P. Mathon, Didier Jezequel, Cecile C. Bidaud, Eric Viollier, Gerard Bardoux, Jean-Jacques Bourrand, Karim Benzerara, Elodie Duprat, Nicolas Menguy, Caroline L. Monteil, Christopher T. Lefevre
Summary: Studying magnetotactic bacteria in Lake Pavin, utilizing various sampling methods, understanding their ecological niche, and efficiently collecting large volumes of water samples using an online pumping system. This research provides a foundation for further multidisciplinary investigations of magnetotactic bacteria populations in Lake Pavin and elsewhere, as well as chemical and isotopic analyses of their magnetosomes.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Review
Chemistry, Physical
Ali Saad, Subharanjan Biswas, Effrosyni Gkaniatsou, Clemence Sicard, Eddy Dumas, Nicolas Menguy, Nathalie Steunou
Summary: MOFs have shown great potential in various applications due to their high and tunable porosity as well as chemical diversity. However, research on certain forms of MOF nanocrystals is limited. Controlling the crystal size, morphology, and porosity is a major challenge for practical applications, but different synthetic strategies offer potential solutions to this issue.
CHEMISTRY OF MATERIALS
(2021)
Article
Environmental Sciences
Jinhua Li, Peiyu Liu, Alima Tamaxia, Heng Zhang, Yan Liu, Jian Wang, Nicolas Menguy, Xiang Zhao, Andrew P. Roberts, Yongxin Pan
Summary: Magnetotactic bacteria (MTB) are prokaryotes that primarily inhabit the oxic-anoxic transition zone in aquatic environments, synthesizing magnetic nanocrystals and intracellular inclusions. The new magnetotactic spirillum strain WYHS-1 produces nearly isotropic magnetite crystals and contains various submicron inclusions, suggesting a role in biogeochemical elemental cycling and biomineral distribution in sediments.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Geochemistry & Geophysics
Pauline Merrot, Farid Juillot, Pierre Le Pape, Pierre Lefebvre, Jessica Brest, Isabelle Kieffer, Nicolas Menguy, Eric Viollier, Jean-Michel Fernandez, Benjamin Moreton, Olivier Radakovitch, Guillaume Morin
Summary: Ferralsols upon ultramafic rocks are rich in Cr and represent a major source of Cr for coastal sediments downstream. The speciation of Cr and Mn in tropical sedimentary settings downstream of these soils was investigated, showing Cr mainly exists as Cr(III) in chromite and clay minerals, while Mn is found in clay minerals and Mn-carbonates. Despite the potential hazard, the sediments appear to favor Cr sequestration as the less mobile and less toxic Cr(III) form.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Multidisciplinary Sciences
Jinhua Li, Peiyu Liu, Nicolas Menguy, Xingliang Zhang, Jian Wang, Karim Benzerara, Lianjun Feng, Lei Sun, Yue Zheng, Fanqi Meng, Lin Gu, Eric Leroy, Jialong Hao, Xuelei Chu, Yongxin Pan
Summary: Biosilicification, the process of forming biological structures composed of silica, is widely distributed among eukaryotes and plays a significant role in global biogeochemical cycles. Recent discoveries of silica transporter genes and silicon accumulation in bacteria suggest that prokaryotes, particularly in ancient times, may also have played a previously unrecognized role in the Si cycle. This study reports the identification of a magnetotactic bacterium that forms intracellular, amorphous silica globules, revealing intracellularly controlled silicification within prokaryotes and its potential influence on the biogeochemical Si cycle during early Earth history.
Article
Materials Science, Multidisciplinary
Giulia Franceschin, Thomas Gaudisson, Sonia Perez Quiros, Nader Yaacoub, Jean-Marc Greneche, Nicolas Menguy, Silvana Mercone, Frederic Mazaleyrat, Souad Ammar
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Thomas Gaudisson, Surender K. Sharma, Rahamane Mohamed, B. Sitamtze Youmbi, Nicolas Menguy, Florent Calvayrac, Mahamadou Seydou, Souad Ammar-Merah
Summary: Monodispersed CoO crystals about 5 nm in size were prepared by forced hydrolysis of cobalt(ii) acetate in diethyleneglycol (DEG). The adsorption of solvent molecules causes in situ oriented aggregation resulting in the precipitation of submicrometer-sized polycrystals.
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)