A5054889888- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Geomagnetism and Paleomagnetism Studies
- Seismic Imaging and Inversion Techniques
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies
- Geological formations and processes
- Pleistocene-Era Hominins and Archaeology
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Geophysical and Geoelectrical Methods
- Geological and Geochemical Analysis
- Cryospheric studies and observations
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Geological and Geophysical Studies Worldwide
- earthquake and tectonic studies
- Astro and Planetary Science
- Winter Sports Injuries and Performance
- Aeolian processes and effects
- Evolution and Paleontology Studies
- Archaeological and Geological Studies
- Oceanographic and Atmospheric Processes
- Archaeology and ancient environmental studies
- Scientific Research and Discoveries
National Oceanography Centre
2015-2025
University of Southampton
2016-2025
China Academy of Launch Vehicle Technology
2024
Hue University
2024
Xinjiang Normal University
2024
Oregon State University
2013-2017
University of Florida
2008-2011
Northern Arizona University
2009
When five Matuyama‐Brunhes (M‐B) boundary records from the North Atlantic are placed on isotope age models, produced by correlation of δ 18 O record directly or indirectly to an ice volume model, M‐B lies consistently at young end marine stage 19 with a mean for midpoint reversal 773.1 ka (standard deviation = 0.4 kyr), ∼7 kyr younger than presently accepted astrochronological this polarity (780–781 ka). Two recently proposed revisions 40 Ar/ 39 Ar Fish Canyon sanidine (FCs) standard 28.201...
Sediments cored along the southwestern Iberian margin during Integrated Ocean Drilling Program Expedition 339 provide constraints on Mediterranean Outflow Water (MOW) circulation patterns from Pliocene epoch to present day. After Strait of Gibraltar opened (5.33 million years ago), a limited volume MOW entered Atlantic. Depositional hiatuses indicate erosion by bottom currents related higher volumes circulating into North Atlantic, beginning in late Pliocene. The coincide with regional...
We produced a composite depth scale and chronology for Site U1385 on the SW Iberian Margin. Using log(Ca/Ti) measured by core scanning XRF at 1-cm resolution in all holes, section was constructed to 166.5 meter (mcd) that corrects stretching squeezing each core. Oxygen isotopes of benthic foraminifera were correlated stacked δ18O reference signal (LR04) produce an oxygen isotope stratigraphy age model. Variations sediment color contain very strong precession signals U1385, amplitude...
The Quaternary hemipelagic sediments of the Japan Sea are characterized by centimeter- to decimeter-scale alternation dark and light clay silty clay, which bio-siliceous and/or bio-calcareous a various degree. Each layers considered as deposited synchronously throughout deeper (> 500 m) part sea. However, attempts for correlation age estimation individual limited upper few tens meters. In addition, exact timing depositional onset these its synchronicity sea have not been explored previously,...
With the development of pass‐through cryogenic magnetometers and u channel sampling method, large volumes paleomagnetic data can be accumulated within a short time period. It is often critical to visualize process these in “real time” as measurements proceed, so that measurement plan dictated accordingly. We introduce new MATLAB™ software (UPmag) designed for easy rapid analysis natural remanent magnetization (NRM) laboratory‐induced samples or core sections. UPmag comprises three graphic...
The long‐term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. rates aspartic acid (Asp) and glutamic (Glu) common taxon, Neogloboquadrina pachyderma, were calibrated last 150 ka 14 C ages emerging Quaternary chronostratigraphy Ocean sediments. An analysis errors indicates realistic age uncertainties about ±12% Asp ±17% Glu. Fifty individual tests are sufficient to analyze multiple...
Arctic deep‐sea sediments often record intervals of negative inclination natural remanence that are tens centimeters thick, implying magnetic excursions with durations thousand years far exceed excursion estimated elsewhere, and the lack tight age control usually provides excessive freedom in labeling excursions. Fortuitous variations sedimentation rate have been invoked to explain “amplified” Alternating field demagnetization remanent magnetization (NRM) sediment cores 08JPC, 10JPC, 11JPC,...
Paleomagnetic analysis and radiocarbon dating of an expanded Holocene deep‐sea sediment sequence recovered by Integrated Ocean Drilling Program (IODP) Expedition 303 from Labrador Sea Site U1305 (Lat.: 57°28.5 N, Long.: 48°31.8 W, water depth 3459 m) provides insights into mechanisms that drive both paleomagnetic secular variation (PSV) magnetization acquisition in sediments. Seventeen dates on planktonic foraminifera define postglacial (ca. 8 ka) sedimentation rates as ranging 35 to > 90...
The Antarctic Peninsula's Pacific margin is one of the best studied sectors continental margin. Since 1990s, several research cruises have targeted rise with geophysical surveys, conventional coring and deep-sea drilling. previous studies highlighted potential large sediment drifts on as high-resolution palaeoenvironmental archives. However, these also suffered from chronological difficulties arising lack calcareous microfossils, initial results geomagnetic relative palaeointensity (RPI)...
We have developed a high-resolution scanning superconducting quantum interference device (SQUID) microscope for imaging the magnetic field of geological samples at room temperature. In this paper, we provide details about SQUID system, including magnetically shielded box (MSB), XYZ stage, data acquisition by and initial evaluation system. The background noise in two-layered PC permalloy MSB is approximately 40–50 pT. long-term drift system ≥1 nT, which can be reduced correction each...
Abstract The snowball Earth hypothesis—that a runaway ice-albedo feedback can cause global glaciation—seeks to explain low-latitude glacial deposits, as well geological anomalies including the re-emergence of banded iron formation and “cap” carbonates. One most significant challenges has been sedimentological cyclicity that taken imply more climate dynamics than expected when ocean is completely covered in ice. However, recent models suggest atmospheric CO 2 accumulates, system becomes...