Article
Chemistry, Multidisciplinary
Zhe J. Zhang, Nicole Xike Nie, Ruslan A. Mendybaev, Ming-Chang Liu, Justin Jingya Hu, Timo Hopp, Esen E. Alp, Barbara Lavina, Emma S. Bullock, Kevin D. McKeegan, Nicolas Dauphas
Summary: Moderately volatile elements such as Na, K, and Rb are depleted differently in planetary bodies, and can be used as tracers to unravel the history of MVE depletion. Experimental studies at high temperatures have shown that diffusion plays a key role in governing the evaporation of K and Rb, leading to isotopic fractionation. Results suggest that the depletion of Na, Rb, and K in planetary bodies can be explained by evaporation from small, differentiated planetesimals under specific conditions.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Edward D. Young, Catherine A. Macris, Haolan Tang, Arielle A. Hogan, Quinn R. Shollenberger
Summary: This study utilizes new experiments and a theoretical analysis to demonstrate that the isotopic fractionation associated with laser-heating aerodynamic levitation experiments is primarily controlled by the velocity of flowing gas. The research successfully explains the new Fe and Mg isotope data by treating the gas as a low-viscosity fluid and considering high Reynolds numbers and minimal drag. Furthermore, a relationship between the ratio of headwind velocity to thermal velocity and saturation is established. The findings suggest that in environments where molten rock encounters gas with appreciable headwinds, the degree of isotope fractionation during evaporation serves as both a velocimeter and a barometer.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Hao Yan, Wolfgang Dreybrodt, Huiming Bao, Yongbo Peng, Yu Wei, Song Ma, Bing Mo, Hailong Sun, Zaihua Liu
Summary: The carbon isotope composition of calcite can vary significantly from that of the solution, leading to uncertainties in interpreting paleoclimate implications. Differences in hydrodynamics can result in distinct elemental compositions in abiogenic calcites, demonstrating the role of diffusion boundary layer thickness in governing carbon isotope variations.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Environmental Sciences
Sheng-Nan Zhang, Yi Gu, Zhen-Li Zhu, Sheng-Hong Hu, Peter M. Kopittke, Fang-Jie Zhao, Peng Wang
Summary: The analysis of Cd isotope ratios in soil, rice grain, and human urine samples from two Cd-contaminated regions in southern China revealed a preferential enrichment of heavy Cd isotopes from soil to rice grain and from grain to urine. The fractionation of Cd isotopes in the soil-rice-human continuum is likely due to processes such as partitioning between the soil solid phase and soil solution, as well as preferential enrichment by metal transporters in humans.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Physics, Applied
Qinglin Wang, Haiwa Zhang, Susu Duan, Peifang Li, Tianji Ou, Dandan Sang, Guozhao Zhang, Hui Jiao, Xin Zhang, Ying Shi, Yinwei Li, Cailong Liu
Summary: This study investigated the evolution of carrier transport properties of SrH2 under pressure-induced structural phase transition, revealing a significant decrease in resistance by about four orders of magnitude after the phase transition. The research provides valuable insights into the structure-conduction relationship and the role of grain boundaries in the transport process.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
B. Bian, S. Taheriniya, G. Mohan Muralikrishna, A. Godha, S. K. Makineni, S. Sankaran, B. B. Straumal, Y. Du, G. Wilde, S. V. Divinski
Summary: Kinetic and structural changes induced by Bi alloying in dilute Ni-Bi alloys were investigated, focusing on grain boundary phase transitions. The grain boundary diffusion of Ni in the Ni-Bi alloys was measured across single and two-phase regions of the bulk phase diagram. The results showed that the Ni grain boundary diffusion rates were dependent on the Bi concentration and were influenced by Bi segregation and multi-layer Bi segregation along the grain boundaries. The presence of a liquid layer of Bi at the grain boundaries resulted in the highest Ni diffusivity. Additionally, structural transitions between different grain boundary phases were found to have a significant impact on the grain boundary diffusion rates.
Article
Chemistry, Multidisciplinary
Hsiang-Hou Tseng, Hung-Che Liu, Min-Hsun Yu, Jia-Juen Ong, Dinh-Phuc Tran, Chih Chen
Summary: Copper joints have replaced solder interconnects in integrated circuits due to their great electrical properties and lower-temperature processing. To isolate Cu from oxidizing during bonding processes, a (111)-oriented nanotwinned Ag (NT-Ag) thin layer was electroless-deposited on a (111)-oriented NT-Cu film. The microstructures of the Ag films were then analyzed, showing that columnar NT-Ag grains epitaxially grew along the columnar NT-Cu grains. Additionally, the bonding strength of the Cu-Ag joints was found to be higher than that of the Ag-Ag joints, possibly due to the greater diffusion rate of Ag atoms in Cu than the self-diffusion of Ag.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Geochemistry & Geophysics
S. Klemme, F. Genske, P. A. Sossi, J. Berndt, C. J. Renggli, A. Stracke
Summary: The new experimental results reveal fractionation of Cr isotopes during degassing of silicate melts. Lighter isotope Cr-52 is enriched in the gas phase and residual melt becomes enriched in the heavier Cr-53 isotope. This study provides important clues for understanding the recording of chromium isotope loss by evaporation in terrestrial magmas.
Article
Materials Science, Multidisciplinary
S. Starikov, A. Abbass, R. Drautz, M. Mrovec
Summary: This study investigates temperature-induced disordering transitions of grain boundaries in body-centered cubic metals using classical atomistic simulations. The study reveals that gradual heating leads to continuous disordering of the grain boundary structure, accompanied by two complexion transitions, analogous to transitions described by the Berezinskii-Kosterlitz-Thouless-Halperin-Nelson-Young theory.
Article
Materials Science, Multidisciplinary
I. Chesser, R. K. Koju, A. Vellore, Y. Mishin
Summary: Atomistic computer simulations are used to investigate the atomic structure, thermal stability, and diffusion processes at the Al-Si interphase boundaries in composite materials. It is found that some stable orientation relationships observed in epitaxy experiments also exist at these interfaces. An interface-induced recrystallization mechanism can transform non-equilibrium interfaces into more stable states. Diffusion of Al and Si atoms in stable Al-Si interfaces is slower compared to diffusion in Al grain boundaries but can be accelerated in the presence of interface disconnections. A qualitative explanation for the sluggish interphase boundary diffusion is proposed, involving correlated atomic rearrangements in the form of strings and rings of collectively moving atoms.
Article
Chemistry, Physical
Masoud Ghasemi, Boyu Guo, Kasra Darabi, Tonghui Wang, Kai Wang, Chiung-Wei Huang, Benjamin M. Lefler, Laine Taussig, Mihirsinh Chauhan, Garrett Baucom, Taesoo Kim, Enrique D. Gomez, Joanna M. Atkin, Shashank Priya, Aram Amassian
Summary: This study reveals a multiscale diffusion mechanism of vacancy-mediated halide diffusion in metal halide perovskites, showing an inverse relationship between grain boundary diffusion and volume diffusion. Stable metal halide perovskites have larger grain boundary diffusivities and smaller volume diffusivities, reducing hysteresis.
Article
Chemistry, Multidisciplinary
R. K. Koju, Y. Mishin
Summary: The research reveals that grain boundaries significantly affect solute diffusion, with the formation of grain boundary clusters enhancing solute drag. A 1.5% Ag alloy reduces grain boundary free energy while decreasing grain boundary mobility coefficients.
Article
Geochemistry & Geophysics
Zhuoying Zhang, Jinlong Ma, Zhibing Wang, Le Zhang, Xinyue He, Guanhong Zhu, Ti Zeng, Gangjian Wei
Summary: This study presents significant variations in delta Rb-87 in both bulk samples and individual mineral species from a granite weathering profile in South China, as well as in nearby stream water. The data demonstrates the complex dynamics of Rb isotope fractionation during geological processes, with a crucial role played by the adsorption and desorption of clay minerals.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Liujie Yang, Xingyu Feng, Jiayu Xie, Hongchen Qian, Xianchao Hao, Wenjun Kuang
Summary: The grain boundary corrosion behavior of Ni15Cr alloy in 650°C/1bar CO2 gas was investigated. It was found that the oxidation behavior of coherent twin boundary is similar to that of grain matrix, while the incoherent twin boundary is prone to preferential intergranular oxidation. Low angle GB is also susceptible to intergranular oxidation, although it can induce GB migration and result in a protective scale. In contrast, random high angle GB is immune to intergranular oxidation.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Masahiro Shimizu, Kenzo Sato, Kento Nakashima, Tomohiro Kiyosawa, Jun Matsuoka, Yasuhiko Shimotsuma, Kiyotaka Miura
Summary: By using a laser-induced local heating experiment and temperature analysis, the composition-dependent sign inversion of the Soret coefficient of SiO2 in binary silicate melts was observed, and the dominant factors determining the migration direction of SiO2 were identified, which is significant for understanding the Soret effect in oxide melts.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Shui-Jiong Wang, Wenzhong Wang, Jian-Ming Zhu, Zhongqing Wu, Jingao Liu, Guilin Han, Fang-Zhen Teng, Shichun Huang, Hongjie Wu, Yujian Wang, Guangliang Wu, Weihan Li
Summary: During Earth's late-stage accretion, impactors delivered most of the volatiles, with nickel serving as an important tracer. Research has found that the BSE has a lighter nickel isotopic composition compared to chondrites, suggesting that this sub-chondritic signature was established during the Moon-forming giant impact.
NATURE COMMUNICATIONS
(2021)
Article
Geochemistry & Geophysics
Frederic Moynier, Yan Hu, Kun Wang, Ye Zhao, Yvan Gerard, Zhengbin Deng, Julien Moureau, Weiqiang Li, Justin I. Simon, Fang-Zhen Teng
Summary: The Nu SapphireTM MC-ICP-MS is a high-precision instrument for measuring potassium isotopes, effectively addressing major isobaric interferences and providing high potassium sensitivity. The precision and accuracy of potassium isotopic data are influenced by several parameters, including total potassium concentration, matching of potassium intensities between sample and standard, and the presence of matrix elements.
Article
Geochemistry & Geophysics
Yan Hu, Fang-Zhen Teng, Catherine Chauvel
Summary: This study used stable potassium isotopes to track the crustal signatures in lavas from Martinique Island in the Lesser Antilles arc. The results show that the variations in K isotopes in these lavas are related to chemical parameters and radiogenic isotope ratios, indicating modification of mantle sources by input of subducted sediments. Most lavas have <1% to 5% of subducted sediments added to their mantle sources, with some samples showing divergence likely caused by the addition of K-bearing fluids from slab dehydration.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Feng Wang, Kai-Chen Xing, Wen-Liang Xu, Fang-Zhen Teng, Yi-Gang Xu, De-Bin Yang
Summary: The Khanka Massif in late Paleozoic is considered as an ideal site to trace fossil ridge-subduction, with different types of Permian igneous rocks showing evidence of subduction setting. The isotope compositions of the rocks support the hypothesis of abnormal high-heat conditions caused by ridge subduction and resultant slab window.
Article
Geochemistry & Geophysics
Yan Hu, Fang-Zhen Teng, Rosalind T. Helz, Catherine Chauvel
Summary: Stable potassium isotopes are being used as tracers for terrestrial recycling and planetary processes. This study investigated K isotope fractionation during the differentiation and solidification of the Kilauea Iki lava lake in Hawaii, and found no analytically resolvable fractionation, indicating a lack of K-rich minerals in the crystallizing assemblage. The results suggest an average delta K-41 of -0.42 +/- 0.08 parts per thousand for the pristine mantle and of -0.42 +/- 0.07 parts per thousand for the BSE.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Yang Sun, Fang-Zhen Teng, Kwan-Nang Pang, Ji-Feng Ying, Scott Kuehner
Summary: The study investigates the origin of EMI reservoir by analyzing the isotopic compositions of lamproites from Leucite Hills, Wyoming, USA, finding that at least two metasomatic events occurred in their mantle sources. The early metasomatic event led to the formation of EMI Sr-Nd-Pb isotopic signatures, while the recent carbonate metasomatism produced the light Mg isotopic signature and diluted the EMI Sr-Nd-Pb isotopic signatures. This study suggests that a combination of Mg and Sr-Nd-Pb isotopes could be an effective tool in deciphering multiple-stage metasomatic events in mantle sources.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geochemistry & Geophysics
Ze-Zhou Wang, Fang-Zhen Teng, Vincent Busigny, Sheng-Ao Liu
Summary: The study demonstrates that potassium isotopic signatures in subducting sediments, inherited from their protoliths, can be preserved to depths of at least 90 km along a cold geotherm gradient, indicating the potential for producing potassium isotope heterogeneity in the source regions of mantle-derived lavas.
AMERICAN MINERALOGIST
(2022)
Article
Geosciences, Multidisciplinary
Yongsheng He, Ai-Ying Sun, Yin -Chu Zhang, Ru-Yi Yang, Shan Ke, Yang Wang, Fang-Zhen Teng
Summary: A new procedure for high precision and high accuracy Mg isotope analysis has been developed using a critical mixture double spike technique and multiple-collector inductively coupled plasma mass spectrometry. The accuracy is ensured by correcting errors arising from improper preparation of the double spike solutions and correcting mass bias offset based on Monte Carlo calculations. Doping experiments show that the method is robust to non-spectrum matrix effects.
SOLID EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Wenjun Li, Mengmeng Cui, Qiqi Pan, Jing Wang, Bingyu Gao, Shanke Liu, Meng Yuan, Benxun Su, Ye Zhao, Fang-Zhen Teng, Guilin Han
Summary: This study presents high-precision analyses of stable potassium (K) isotope ratio using advanced technology. The accuracy of the analyses is confirmed by measuring well-characterized geostandards. The findings suggest that stable K isotopes can be used as an indicator of ancient seawater composition and have various geological applications.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Heng-Ci Tian, Fang-Zhen Teng, Xin-Yang Chen, Zi-Xiao Guo, Xiao-Tong Peng, Wei Yang, Yi-Lin Xiao
Summary: Elemental exchange during seafloor alteration has significant effects on the chemical compositions of seawater and oceanic crust, as well as global elemental cycling. This study investigates Li and K isotopic compositions in an altered pillow basalt from Mariana Trench, revealing large isotopic variations on a centimeter scale and providing evidence for multi-mode chemical exchange in oceanic basalts. This research enhances our understanding of seafloor alteration processes.
Article
Geochemistry & Geophysics
Kai -Chen Xing, Feng Wang, Fang-Zhen Teng, Wen-Liang Xu, Ming Li, Yue-Wu Sun, De-Bin Yang
Summary: The Triassic-Jurassic boundary is a crucial period for studying chemical weathering intensity and climatic change. In this study, Mg-Zn-Cu isotopic data from a terrestrial sedimentary section in the southern margin of the Junggar Basin in high latitude Asia are analyzed, revealing a reduced sedimentary environment and increasingly intensive chemical weathering across the boundary, responding to a warmer and more humid paleoclimate. This regional climatic change in high latitude areas can be linked to known global climate change during this period, providing new insights into the global pattern of climate change at the Triassic-Jurassic boundary.
Article
Geochemistry & Geophysics
Wenshuai Li, Xiao-Ming Liu, Yan Hu, Fang-Zhen Teng, Oliver A. Chadwick
Summary: The controls on potassium (K) isotope fractionation during chemical weathering are evaluated using two regolith profiles developed over -350 kyr on the humid and arid sides of Kohala Mountain, Hawai'i. The findings suggest that potassium enrichment and loss occur in both regolith profiles, with the humid profile showing significant potassium enrichment in shallow horizons and loss in deeper horizons. The presence of K-bearing mineral aerosols in the humid regolith may explain the apparent contradiction between enrichment and loss. Climate, weathering, plant cycling, and the addition of marine and mineral aerosols all contribute to the potassium isotope composition in Hawaiian regoliths.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Hangshan Lei, Zhidan Zhao, Qian Ma, Fang-Zhen Teng, Shuangquan Zhang, Brian Cousens, Dong Liu, Di-Cheng Zhu, Qing Wang, Zhuang Miao, Yiyun Yang, Jingkai Wu
Summary: Paleogene potassium-rich volcanic rocks (PVRs) in the southeastern Tibetan Plateau are studied to understand their petrogenesis and geodynamic mechanism. The PVRs are found to originate from enriched lithospheric mantle, possibly replenished by a hybrid carbonate-silicic sediment. The formation of these volcanic rocks is closely associated with the delamination of the thickened lithosphere and asthenosphere upwelling.
Article
Geochemistry & Geophysics
Richard M. Kettler, Yongsheng He, Shan Ke, Fang-Zhen Teng, David B. Loope
Summary: The discovery of spherical accumulations of iron oxide mineralization on Mars has led to renewed interest in similar accumulations on Earth. This study focuses on the rinded iron oxide concretions found in the Navajo Sandstone and evaluates four different models for their formation. The authors measured the iron isotope values of different iron-bearing minerals and combined their data with published measurements to assess each model. The results suggest a complex process involving the transport and oxidation of iron in a closed system.
Meeting Abstract
Geochemistry & Geophysics
N. X. Nie, X. -Y. Chen, T. Hopp, J. Y. Hu, Z. J. Zhang, F. -Z. Teng, A. Shahar, N. Dauphas
METEORITICS & PLANETARY SCIENCE
(2021)
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.
