A5014889055- Geomagnetism and Paleomagnetism Studies
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Magnetic Properties of Alloys
- Geophysical and Geoelectrical Methods
- High-pressure geophysics and materials
- Magnetic and Electromagnetic Effects
- Planetary Science and Exploration
- Geochemistry and Elemental Analysis
- Astro and Planetary Science
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Geological and Geophysical Studies
- Clay minerals and soil interactions
- Paleontology and Stratigraphy of Fossils
- Food Quality and Safety Studies
- Natural product bioactivities and synthesis
- Solar and Space Plasma Dynamics
- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Metallurgy and Cultural Artifacts
- Traditional Chinese Medicine Analysis
- Pacific and Southeast Asian Studies
- Ancient Mediterranean Archaeology and History
- Maritime and Coastal Archaeology
Chinese Academy of Sciences
2014-2025
University of Chinese Academy of Sciences
2023-2025
Institute of Geology and Geophysics
2014-2025
Institute of Geology and Geophysics
2020-2024
University of California, San Diego
2016-2021
Scripps Institution of Oceanography
2016-2021
China University of Geosciences (Beijing)
2012-2015
Henan Institute of Geological Survey
2012
Capital Medical University
1996
Fujian Institute of Research on the Structure of Matter
1996
The evolution of the lunar magnetic field can reveal Moon’s interior structure, thermal history, and surface environment. mid-to-late-stage is poorly constrained, thus, existence a long-lived dynamo remains controversial. Chang’e-5 mission returned heretofore youngest mare basalts from Oceanus Procellarum uniquely positioned at midlatitude. We recovered weak paleointensities ~2 to 4 microtesla basalt clasts 2 billion years ago, attesting longevity until least midstage. This paleomagnetic...
Significance The geomagnetic field is an intriguing fundamental physical property of the Earth. Its evolution has significant implications for issues such as geodynamics, life on Earth, and archaeomagnetic dating. Here, we present 21 archaeointensity data points from China establish first reference curve eastern Asia. Our results record rarely captured extreme behaviors field, with exceptionally low intensity around ∼2200 BCE (hitherto lowest value observed Holocene) a “spike” dated at ∼1300...
Abstract Oceanic red beds, preserving primary depositional remanent magnetization, play a key role in reconstructing the Tethyan paleogeography. However, partial remagnetization caused by chemical processes could be pervasive these rocks, leading to flawed reconstructions, and thus, differentiating secondary remanences is important. In this paper, we conduct multiple X‐ray diffraction, petrographic, diffuse reflectance spectroscopy, rock magnetic analyses on Upper Cretaceous oceanic beds...
Abstract The Chang'e‐5 landing site provides an important window into the Moon's late Eratosthenian period of volcanism at ∼2 Ga. Clarifying history volcanic activity using radioisotopic dating assists investigations evolution lunar surface as well internal dynamics. Recent chronological basalts produced ages spanning ∼100 Ma, thereby inhibiting interpretation duration recorded in returned samples. We used microcomputed tomography and Back‐Scatter Electron imaging to characterize structure...
Abstract Thermal demagnetization furnaces are widely used paleomagnetic facilities for progressive removal of naturally acquired magnetic remanence or the imparting well-controlled laboratory magnetization. An ideal thermal demagnetizer should maintain “zero” field in sample chamber during treatments. However, noises, including residual fields construction material and induced caused by alternating current (AC) heating element always present, which can contaminate results at elevated...
We carried out an archaeomagnetic directional study on 38 oriented samples (bricks and baked clays) collected from four archaeological locations at three provinces in China. The ages of our samples, spanning ∼3000 BCE to ∼1300 CE, were constrained using a combination context, radiocarbon dating stratigraphic information. Rock magnetic results demonstrate that the main minerals studied are magnetite and/or hematite single domain superparamagnetic states. A total 20 new reliable...
Abstract We have carried out an archaeomagnetic study on a late Neolithic locality (Liujiazhai) in Sichuan, southwestern China. pull together various dating techniques, including radiocarbon analysis, optically stimulated luminescence dating, stratigraphic information as well archaeological and estimations, to constrain the age of studied samples. Rock magnetic results indicate thermally stable fine‐grained magnetite or titanomagnetite dominant carriers. More than half specimens (141/246)...
Significance The structure of Earth’s ancient magnetic field is constrained by paleomagnetic measurements. However, owing to data sparsity, models need be smoothed; such smoothing can obscure rapid but crucial fluctuations in the field. We have shown that historical observations equatorial aurorae provide added constraints on dynamics deep interior, suggesting possible fluctuating behavior a low-intensity geomagnetic anomaly during seventeenth and eighteenth centuries West Pacific. This an...
The geomagnetic field is one of Earth's fundamental properties with a history ~3.5 Gyr. field, generated in core window to the deep interior Earth and may have played key role evolution life on our planet. Materials surface that contain magnetic minerals can record information about which they formed. Fired archeological materials (e.g., pottery, brick, burnt clay) are favorable recorders been widely employed recover variations over periods hundreds thousands years. longevity Chinese...
Thellier-type experiments are the most widely applied approaches for determining absolute paleointensities of Earth's magnetic field. One major problem, however, is that specimens prone to thermal alteration due intensive treatment during experiments. Linear Arai plots with acceptable partial remanent magnetization (pTRM) checks have been considered as evidence absence or negligible effects and reliable indicators high-quality paleointensity estimates. However, by simulating Coe variant...
Abstract Paleomagnetic secular variation (PSV) records provide important information for the dynamic processes of Earth's geomagnetic field, and also can be used regional stratigraphic correlation. We conducted a paleomagnetic study on high sedimentation rate Holocene loess section (the Minle section) with precise 14 C age constraints in Northwest China. Rock magnetic results indicate that single domain pseudo‐single‐domain magnetites are main carriers natural remanent magnetization....
Abstract Paleointensity records are vital for understanding the Earth's evolution, but obtaining accurate paleointensity is a challenging task. The Shaw‐type method, widely‐used protocol, produces biased results occasionally despite strict selection criteria. By examining relationships between paleointensities and rock magnetic parameters from pseudo‐Tsunakawa‐Shaw experiment, we ascertain that changes in ratio of thermal to anhysteretic remanent magnetization (R) proportional bias...
Abstract Archeomagnetism focuses on exploring high‐resolution variations of the geomagnetic field over hundreds to thousands years. In this study, we carried out a comprehensive study chronology, absolute and relative paleointensity late Neolithic site in central China. Ages samples are constrained be ~3,500–3,000 BCE, period when available data sparse. We present total 64 high‐fidelity paleointensities, demonstrating varied quickly from ~55 ~90 ZAm 2 between BCE. Our results record new...
Abstract In this study, we collected samples from subaerial basaltic glassy margins the second Hawaii Scientific Drilling Project (HSDP2) core. We employed rigorous “IZZI” method during paleointensity experiment combined with stringent “CCRIT” criteria for data selection to obtain 21 robust estimates recorded by 20 lava flows. compared our new results published paleointensities interiors of flows HSDP2 and found that are systematically lower than those same The reasons discrepancy in...