A5010219293- Cryospheric studies and observations
- Geological and Geochemical Analysis
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- High-pressure geophysics and materials
- Planetary Science and Exploration
- earthquake and tectonic studies
- Winter Sports Injuries and Performance
- Geochemistry and Geologic Mapping
- Metallurgical Processes and Thermodynamics
- Landslides and related hazards
- nanoparticles nucleation surface interactions
- Astro and Planetary Science
- Geotechnical and Geomechanical Engineering
- Rock Mechanics and Modeling
- Freezing and Crystallization Processes
- Geological Modeling and Analysis
- Hydrocarbon exploration and reservoir analysis
- Geophysical and Geoelectrical Methods
- Metal and Thin Film Mechanics
- Spacecraft and Cryogenic Technologies
- Icing and De-icing Technologies
- Paleontology and Stratigraphy of Fossils
- Advanced Algorithms and Applications
- Advanced Sensor and Control Systems
Institute of Geology and Geophysics
2018-2025
Chinese Academy of Sciences
2017-2025
Center for High Pressure Science & Technology Advanced Research
2024
University of Chinese Academy of Sciences
2017-2024
Beijing University of Technology
2018-2024
Center for High Pressure Science and Technology Advanced Research
2024
University of Pennsylvania
2015-2021
Southwest Hospital
2017-2021
Army Medical University
2017-2021
Chongqing University
2021
Abstract To investigate the mechanism that produces crystallographic preferred orientations (CPO) characteristic of sheared partially molten rocks mantle composition, we analyzed microstructures samples olivine plus 7% basaltic melt deformed in torsion to shear strains as large 13.3. Electron backscattered diffraction (EBSD) observations reveal a CPO characterized by weak a‐c girdle plane develops 4. This CPO, which exhibits slightly stronger alignment [001] than [100] axes direction,...
A paper-based assay for rapid and reliable blood grouping uses dye-based color changes as a visual readout to identify distinct components.
Abstract. Synthetic polycrystalline ice was sheared at temperatures of −5, −20 and −30 ∘C, to different shear strains, up γ=2.6, equivalent a maximum stretch 2.94 (final line length is times the original length). Cryo-electron backscatter diffraction (EBSD) analysis shows that basal intracrystalline slip planes become preferentially oriented parallel plane in all experiments, with primary cluster crystal c axes (the axis perpendicular plane) plane. In except two highest-strain experiments...
Abstract. In order to better understand ice deformation mechanisms, we document the microstructural evolution of with increasing strain. We include data from experiments at relatively low temperatures (−20 and −30 ∘C), where axial strain has never before been documented. Polycrystalline pure water was deformed under a constant displacement rate (strain ∼1.0×10-5 s−1) progressively higher strains (∼ 3 %, 5 8 12 % 20 %) −10, −20 ∘C. Microstructural were generated cryogenic electron...
Abstract. Microstructures provide key insights into understanding the mechanical behavior of ice. Crystallographic preferred orientation (CPO) develops during plastic deformation as ice deforms dominantly by dislocation glide on basal plane, modified and often intensified dynamic recrystallization. CPO patterns in fine-grained have been relatively well characterized understood experiments nature, whereas “warm” (T>-10∘C), coarse-grained, natural remain enigmatic. Previous microstructural...
Abstract The creep behavior of ice is believed to be dominated by dislocation at high stresses ( 1 MPa) and homologous temperatures 0.9). Dislocation often described the Glen law, , with a canonical value 3, independent grain size. Laboratory studies deformation elevated pressures, however, suggest that characterized 4. Here, we deformed samples initial sizes 0.23 0.63 mm, 263 K confining pressures 10 or 20 MPa. experiments yield 3.6 using peak obtained strain 0.02, reveal marked dependence...
The development of the western regions in China has followed same simple irreversible line --- "resources obtaining-processing and production waste emission" for a long time, while due to local resources shortage eco-environment capacity, circular economy turns be inevitable. Through investigations researches, reasonable thinking, systematic analysis, connotation is clearly explored, weakness have been analyzed as well, thus suggestions raised from following major 5 aspects: establishment...
Significance Although plate tectonics has seen broad acceptance for Earth, the manner in which lithospheric plates are coupled to Earth’s deeper interior is still heavily debated. In particular, recent seismological observations suggest a sharp, flat base of lithosphere, whereas thermal models gradational boundary that deepens with age. Based on laboratory experiments, we most appropriate and seismic studies detecting features frozen into lithosphere after melting at midocean ridges....
Context. Olivine responds to space weathering in the fastest and most profound way, which results significant spectral alteration effects (SWSAEs) on airless silicate bodies. Although Mg-rich olivine (Fa 10 ) has been subjected extensive studies, SWSAEs of Fe-rich (Fa# > 20) or Fa-dominant ⩾ 50) are still poorly understood. Aims. We aim systematically characterize associated alterations surface Phobos Moon. Methods . conducted nanosecond pulsed laser irradiation experiments a set...
In-situ stable Mg isotope analysis of olivine, the most common mineral in igneous and metamorphic rocks, provides critical insights into their formation timescales. However, accurate correction significant matrix effects is hampered by lack olivine reference materials with forsterite (Fo) content below 80. More importantly, current techniques using secondary ion mass spectrometry (SIMS) or laser ablation-multi collector-ICP-MS (LA-MC-ICP-MS) are insufficient to decipher geological processes...
Abstract. Plastic deformation of polycrystalline hexagonal ice (ice Ih) induces crystallographic preferred orientations (CPOs), which give rise to anisotropy in the viscosity ice, thereby exerting a strong influence on flow glaciers and sheets. The development CPOs is governed by relative importance two pivotal recrystallization mechanisms: subgrain lattice rotation strain-induced grain boundary migration (GBM). To examine impact strain these mechanisms, synthetic (doped with ∼ 1 vol. %...
The processes of partial melting and subsequent melt transport are fundamental to Earth's differentiation, from the separation core mantle magma generation, evolution, segregation ascent within crustal domains. Active volcanoes have as their source partially molten areas upper crust. possibility a ascend depends on its connectivity, where percentage, dihedral angle between solid, well recrystallisation processes, play role (Llorens et al., 2016). deformation is primarily governed by...
Abstract Fluorine (F) and chlorine (Cl) are important volatiles in olivine its high-pressure polymorphs, which would significantly affect phase transition, melting temperature, physical property of the mantle. F Cl concentrations can be detected by electron probe microanalysis (EPMA). However, analytical accuracy precision impeded severe peak overlaps, low intensities traditional crystals, secondary fluorescence effects. In this study, we constructed an optimized method with high to analyze...
Abstract Ice in both terrestrial and planetary settings often contains rock particles. Here we present an experimental investigation of the influence intergranular particles on rheological behavior ice. Experiments were performed samples fabricated from 10‐μm ice powders +1‐μm graphite or 0.8‐μm alumina subjected to elevated confining pressures. A critical particle fraction, ∼6%, was observed, below which behave like pure deform by grain boundary sliding (GBS) dislocation creep, above GBS...
Accurate and rapid blood typing plays a vital role in variety of biomedical forensic scenarios, but recognizing weak agglutination remains challenging. Herein, we demonstrated flipping identification with prompt error-discrimination (FLIPPED) platform for automatic group readouts. Bromocresol green dye was exploited as characteristic chromatography indicator the differentiation plasma from whole by presenting teal color against brown color. After integrating these changes into quick-response...
We propose to develop a wide-field and ultra-high-precision photometric survey mission, temporarily named "Earth 2.0 (ET)". This mission is designed measure, for the first time, occurrence rate orbital distributions of Earth-sized planets. ET consists seven 30cm telescopes, be launched Earth-Sun's L2 point. Six these are transit telescopes with field view 500 square degrees. Staring in direction that encompasses original Kepler four continuous years, this monitoring will return tens...
Significance Partially molten regions of Earth link mantle convection with surface volcanism. We present laboratory experiments and theory that are at the heart understanding connection between these interior processes. The proposes presence melt fundamentally changes style deformation, making it anisotropic leading-order, testable consequences. results in agreement theoretical predictions. These novel a foundational level profoundly surprising. Together they make case creep rheology...
Abstract Strain weakening leads to the formation of high‐strain shear zones and strongly influences terrestrial ice discharge. In glacial flow models, strain is assumed arise from alignment weak basal planes—the development a crystallographic preferred orientation, CPO—during flow. However, in experiments, also coincides with grain size reduction, which has been invoked as mechanism other minerals. To interrogate relative contributions CPO reduction toward weakening, we deformed initially...
Abstract Stress‐driven melt segregation may have important geochemical and geophysical effects but remains a poorly understood process. Few constraints exist on the permeability distribution of in deformed partially molten rocks. Here, we characterize 3D network resulting an experimentally rock containing several melt‐rich bands based X‐ray microtomography data set. Melt fractions range from 0.08 to 0.28 ∼20‐μm‐thick bands, 0.02 0.07 intervening ∼30‐μm‐thick regions. We simulated flow...
Abstract. Plastic deformation of polycrystalline ice 1 h induces crystallographic preferred orientations (CPOs), which give rise to anisotropy in the viscosity ice, thereby exerting a strong influence on flow glaciers and sheets. The development CPOs is governed by two pivotal mechanisms: recrystallization dominated subgrain/lattice rotation strain-induced grain boundary migration (GBM). To examine impact strain transition dominant mechanism, synthetic (doped with ∼1 vol.% graphite) was...