Article
Multidisciplinary Sciences
Arthur Briaud, Clement Ganino, Agnes Fienga, Anthony Memin, Nicolas Rambaux
Summary: Seismological models from Apollo missions revealed the Moon's inner structure, indicating a decrease in seismic wave velocities at the core-mantle boundary. However, the resolution of these records is not sufficient to determine the existence of a solid inner core and the impact of lunar mantle overturn.
Article
Geochemistry & Geophysics
Leif Tokle, Greg Hirth, Yan Liang, Paul Raterron, Nick Dygert
Summary: The viscosity of ilmenite is influenced by pressure and Mg-content, with ilmenite40 showing larger stress exponent and activation volume than ilmenite100. Ilmenite100 has significantly lower viscosity compared to dry olivine under conditions representative of the early ilmenite-bearing cumulate. Lunar mantle overturn may be dominated by longer wavelength downwellings in a dry lunar mantle, and by shorter wavelength downwellings in a wet lunar mantle during initial overturn.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Geochemistry & Geophysics
Martijn Klaver, Tu-Han Luu, Jamie Lewis, Maximiliaan N. Jansen, Mahesh Anand, Johannes Schwieters, Tim Elliott
Summary: The Ca isotope compositions of mare basalts provide insight into the lunar mantle's heterogeneous nature. Modelling indicates that the dominantly harzburgitic cumulates of the lunar interior should be isotopically heavier than Earth's mantle. Addition of late-stage clinopyroxenite cumulates is required to produce a suitable source that can generate low-Ti basalt compositions.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Max W. Schmidt, Giuliano Kraettli
Summary: This study experimentally simulates the fractional crystallization of a global lunar magma ocean and explores the resulting mineral cumulate layers, temperature distribution, and nature of the original lunar crust. The findings suggest that the original lunar crust was thicker than currently observed, indicating that post-magma ocean convection removed denser crust layers. This process led to remelting of downslumped crust in the deep lunar mantle, generating a second generation of magmatism and providing insights into the formation of lunar samples.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Geochemistry & Geophysics
Kat Shepherd, Olivier Namur, Michael J. Toplis, Jean-Luc Devidal, Bernard Charlier
Summary: Experimental investigations were conducted on the partitioning of trace elements between ilmenite, magnetite, clinopyroxene, and melt in synthetic ferrobasaltic compositions under varying oxygen fugacity and melt composition conditions. The partitioning behavior of different elements was found to be influenced by factors such as melt polymerization, lattice strain, and TiO2 content in the melt. Additionally, a strong correlation between vanadium partitioning and oxygen fugacity was observed, leading to the proposal of vanadium partitioning as an oxybarometer for estimating oxygen fugacity in ferrobasaltic layered intrusions like the Skaergaard intrusion.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Stephen M. Elardo, Daniel F. Astudillo Manosalva, Anne Peslier
Summary: The presence of feldspathic lithologies in lunar meteorites has expanded our knowledge of the lunar crust. However, their origins and relationships to other major crustal lithologies are not fully understood. This study used phase equilibrium modeling to investigate the origins and petrologic connections of lunar crustal lithologies. The results suggest that the compositions of the Mg- and alkali-suites are consistent with partial melting of hybridized sources, while fractional crystallization of KREEP-free Mg-suite melts can produce the characteristics of feldspathic meteoritic lithologies. Overall, the origins of magnesian anorthosites, anorthositic troctolites, and granulites in lunar meteorites remain ambiguous.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Engineering, Aerospace
Yulong Feng, Tailang Dong, Depeng Ren, Jianshan Wang, Yuhong Cui
Summary: This paper proposes an improved calculation method to simulate lunar dust transport during removal by electric curtain-traveling waves in the lunar environment. The research shows that the final dust removal rate is positively correlated with frequency, and negatively related to the surface energy between particles and the film but positively related to applied voltage and particle charge.
Article
Geology
I. Ashchepkov, N. V. Vladykin, H. A. Kalashnyk, N. S. Medvedev, A. Saprykin, H. Downes, O. S. Khmelnikova
Summary: The study of mantle xenocrysts from Devonian kimberlite pipes in the SE Ukrainian Shield provides insights into the mantle structure and evolution beneath the shield. The composition of garnets and minerals suggest the presence of seven distinct layers in the mantle lithosphere, each with different geochemical characteristics.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geochemistry & Geophysics
Yuan Li, Yan-Xiang Li, Zheng Xu
Summary: The study investigates Cu/Ag fractionation during partial melting of silicate mantles of Earth, Mars, and the Moon. Results show Cu/Ag ratios in basalts agree with their mantle source Cu/Ag ratios within 50% relative. The homogeneous distribution of Cu/Ag in Earth's mantle and limited Cu/Ag fractionation during slab dehydration/melting in subduction zones is observed.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Esther Schmaedicke, Thomas M. Will
Summary: Meta-basaltic eclogite occurs in three high-pressure units in the Erzgebirge, each with different peak metamorphic conditions and mineral compositions. The formation of light eclogite is interpreted as plagioclase accumulation in a MOR magma chamber. There is no visible compositional difference between well-preserved eclogite and samples with post-eclogitic overprint, suggesting that prograde dehydration reactions did not significantly modify element concentrations.
Article
Geochemistry & Geophysics
Hugh Rollinson
Summary: New geochemical data show the similarity between Neoarchaean TTGs in the middle crust of the Zimbabwe Craton and the lower crust of the Northern Marginal Zone of the Limpopo Belt. This paper aims to identify the trace element composition of the parental melts to the TTGs, define the petrological processes, and set limits on possible petrological models for crust generation.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Materials Science, Multidisciplinary
Shuai Zhao, Renbo Song, Yingchao Zhang, Weifeng Huo, Changhong Cai, Yongjin Wang
Summary: This study explores the carbide evolution behavior and mechanical property evolution mechanisms of intercritical-annealed 3Mn steel during the tempering process. The results show that appropriate tempering time can increase the elongation and tensile strength of the steel. It is observed that carbide precipitation occurs first, followed by dissolution during tempering. Abnormal degradation of mechanical properties is found at 10 minutes of tempering, while the optimal mechanical properties are achieved at 20 minutes of tempering.
MATERIALS CHARACTERIZATION
(2023)
Article
Acoustics
Xiaokun Yan, Hu Li, Feng Liu, Yang Liu
Summary: This study proposes a safety evaluation approach of tunnel based on monitoring data during construction, which models tunnel excavation and deformation to evaluate the structural safety. The effectiveness of the proposed method is demonstrated using dynamic monitoring data obtained during the construction of an actual tunnel.
SHOCK AND VIBRATION
(2021)
Article
Nutrition & Dietetics
Jiancong Huo, Hui Yao, Jiagen Li, Jinmei Wang, Soottawat Benjakul, Bin Zhang
Summary: The physicochemical and volatile flavor properties of neon flying squid (OB), jumbo squid (DG), and Argentine squid (IA) mantles were studied during 8 days of chilled storage. The results showed that the chilled conditions caused rapid increases in pH value, TVBN, and carbonyl and MDA content of the squid mantles, while MP content decreased and springiness declined. OB mantles exhibited less chemical stability compared to the other two species. Histological observations revealed that DG mantle tissues had more compact structures. Volatile flavor analysis identified several compounds that were highly abundant in the mantles, likely due to protein and lipid decomposition, oxidation, and degradation, which varied among the different squid species. These findings provide insights into the quality changes of the three squid species during chilled storage.
FRONTIERS IN NUTRITION
(2023)
Article
Materials Science, Multidisciplinary
Feiyu Zhao, Peng Chen, Baoyu Xu, Qian Yu, R. Devesh K. Misra, Guodong Wang, Hongliang Yi
Summary: A carbide-free bainitic steel with excellent mechanical properties was studied, and the transformation behavior of austenite to martensite with different morphologies during tensile straining was quantitatively characterized. It was found that different morphologies of austenite transformed at different stages of deformation, affecting the strain partitioning and contributing to the work hardening rate of the steel.
MATERIALS CHARACTERIZATION
(2021)
Article
Geochemistry & Geophysics
Yan Liang, Boda Liu
EARTH AND PLANETARY SCIENCE LETTERS
(2018)
Article
Geochemistry & Geophysics
Haoyuan Li, Nan Zhang, Yan Liang, Bingcheng Wu, Nicholas J. Dygert, Jinshui Huang, E. M. Parmentier
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2019)
Article
Geochemistry & Geophysics
Alexandra Yang Yang, Chunguang Wang, Yan Liang, C. Johan Lissenberg
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2019)
Article
Geochemistry & Geophysics
Chunguang Wang, Mauro Lo Cascio, Yan Liang, Wenliang Xu
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Geochemistry & Geophysics
Veronique Le Roux, Yan Liang
Article
Geochemistry & Geophysics
Boda Liu, Yan Liang
EARTH AND PLANETARY SCIENCE LETTERS
(2019)
Article
Geochemistry & Geophysics
Boda Liu, Yan Liang
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Geochemistry & Geophysics
Yan Liang
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Geochemistry & Geophysics
Leif Tokle, Greg Hirth, Yan Liang, Paul Raterron, Nick Dygert
Summary: The viscosity of ilmenite is influenced by pressure and Mg-content, with ilmenite40 showing larger stress exponent and activation volume than ilmenite100. Ilmenite100 has significantly lower viscosity compared to dry olivine under conditions representative of the early ilmenite-bearing cumulate. Lunar mantle overturn may be dominated by longer wavelength downwellings in a dry lunar mantle, and by shorter wavelength downwellings in a wet lunar mantle during initial overturn.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Geochemistry & Geophysics
Chunguang Wang, Yan Liang, Wenliang Xu
Summary: Amphibole-bearing rock sequences are formed through crystallization of partially reacted melts during cooling in experiments where basaltic andesite and basalt with 4 wt% water are juxtaposed against lherzolite at high temperature and pressure conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Yan Liang, Zejia Ji, Boda Liu
Summary: This study investigated the REE abundance in clinopyroxene and orthopyroxene in residual spinel peridotites to understand mantle processes. It concluded that deducing melting parameters from bulk peridotite samples is more reliable than from clinopyroxene alone, and highlighted the different susceptibility of HREE in clinopyroxene and LREE in orthopyroxene to subsolidus redistribution.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geochemistry & Geophysics
D. J. Cherniak, Y. Liang
Summary: This study characterizes the chemical diffusion of Ca in natural enstatite and explores its sensitivity to crystallographic orientation, oxygen fugacity, silica activity, and Ca concentration. The results show that Ca diffusion in enstatite is relatively insensitive to these factors, and the diffusion is slower than that of some other cations but faster than others. The obtained diffusion parameters are used to develop a model for the Ca-inopx thermometer and estimate the cooling rates of peridotites and pyroxenites.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Yan Liang
Summary: Mixing in basalts is widely used to explain variations in radiogenic isotope ratios and highly incompatible trace elements. This study presents a new mixing model that considers the size, spatial location, and melting history of enriched and depleted mantle parcels. The results show that the compositions of pooled melt do not follow a single mixing curve, but instead define a mixing loop. Understanding these mixing processes is important for studying the chemical variations in mantle-derived melts.
JOURNAL OF PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Kei Shimizu, Yan Liang, Chenguang Sun, Colin R. M. Jackson, Alberto E. Saal
AMERICAN MINERALOGIST
(2017)
Article
Geochemistry & Geophysics
Nick Dygert, Peter B. Kelemen, Yan Liang
EARTH AND PLANETARY SCIENCE LETTERS
(2017)
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)