Results 51 to 60 of about 20,697,483 (185)

Miocene to Quaternary Tectonostratigraphic Evolution of the Northern Section of the Burdur‐Fethiye Shear Zone, South‐Western Türkiye

Geological Journal, EarlyView.
New zircon ages reveal that lacustrine sedimentation initiated in the Late Miocene (Messinian), revising earlier Pliocene age assignments. The study results support the interpretation of the northern BFSZ as a broad left‐lateral transtensional shear zone rather than a discrete sinistral fault or simple extensional graben array.
İrem Elitez, Gürsel Sunal, Cenk Yaltırak, İsak Yılmaz   +3 more
wiley   +1 more source

A new high-resolution geomagnetic field model for southern Africa

South African Journal of Science
Earth’s magnetic field is a dynamic, changing phenomenon. The geomagnetic field consists of contributions from several sources, of which the main field originating in Earth’s core makes up the bulk.
Amore E. Nel, Achim Morschhauser, Foteini Vervelidou, Jürgen Matzka   +3 more
doaj   +1 more source

Mercury cycling during the last glacial period in Arctic Lake El'gygytgyn, NE Russia

Journal of Quaternary Science, EarlyView.
ABSTRACT Tectonic processes play a key role in the global mercury (Hg) cycle on geological timescales, by mobilising Hg from deep Earth reservoirs to the surface. These natural fluxes also introduce a dynamic component to the terrestrial Hg cycle that can interact with other environmental signals and influence Hg delivery to sedimentary records.
Alice R. Paine, Joost Frieling, Bernd Wagner, Martin Melles, Volker Wennrich, Tamsin A. Mather, Stuart A. Robinson, David M. Pyle   +7 more
wiley   +1 more source

Spectral and spatial decomposition of lithospheric magnetic field models using spherical Slepian functions [PDF]

Geophysical Journal International, 2013
Global magnetic field models are typically expressed as spherical-harmonic expansion coefficients. Slepian functions are linear combinations of spherical harmonics that produce new basis functions, which vanish approximately outside chosen geographical boundaries but also remain orthogonal within the spatial region of interest. Hence, they are suitable
Beggan, Ciarán D., Saarimäki, Jarno, Whaler, Kathy; id_orcid 0000-0002-7386-223X, Simons, Frederik J.   +3 more
openaire   +3 more sources

Repeat station data compared to a global geomagnetic field model

Annals of Geophysics, 2013
Geomagnetic repeat station surveys with local variometers for improved data reductions have been carried out in Germany for about ten years. For nearly the same time interval the satellites Ørsted and CHAMP have provided a good magnetic field data ...
Monika Korte, Vincent Lesur
doaj   +1 more source

Magnetic field gradients from the ST‐5 constellation: Improving magnetic and thermal models of the lithosphere

Geophysical Research Letters, 2007
We report the development of a new technique (magnetic gradiometry) for satellite‐based remote sensing of the lithosphere. The measurements reported here represent the first systematic measurements of lithospheric magnetic field gradients, and were collected from a spinning spacecraft.
M. Purucker, T. Sabaka, G. Le, J. A. Slavin, R. J. Strangeway, C. Busby   +5 more
openaire   +1 more source

A comprehensive model of Earth’s magnetic field determined from 4 years of Swarm satellite observations

Earth, Planets and Space, 2018
The European Space Agency’s three-satellite constellation Swarm, launched in November 2013, has provided unprecedented monitoring of Earth’s magnetic field via a unique set of gradiometric and multi-satellite measurements from low Earth orbit.
Terence J. Sabaka, Lars Tøffner-Clausen, Nils Olsen, Christopher C. Finlay   +3 more
doaj   +1 more source

Modeling the lithospheric magnetic field over France by means of revised spherical cap harmonic analysis (R‐SCHA) [PDF]

Journal of Geophysical Research: Solid Earth, 2006
We have recently proposed the revised spherical cap harmonic analysis (R‐SCHA) modeling technique. The new mathematical functions represent faithfully the spatial variations of potential fields in a restricted area. In this paper, we tackle the inverse problem and outline the efficiency of the new basis functions with respect to real magnetic data ...
Thébault, E., Mandea, M., Schott, J.
openaire   +3 more sources

Lithospheric magnetic variations on the Tibetan Plateau based on a 3D surface spline model, compared with strong earthquake occurrences

Earth and Planetary Physics
The National Geophysical Data Center (NGDC) of the United States has collected aeromagnetic data for input into a series of geomagnetic models to improve model resolution; however, in the Tibetan Plateau region, ground-based observations remain ...
PengTao Zhang, Jun Yang, LiLi Feng, Xia Li, YuHong Zhao, YingFeng Ji   +5 more
doaj   +1 more source

Cretaceous–Palaeogene Plate Boundary Evolution at the Pacific Margins of Zealandia and West Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
Improved satellite‐derived gravity data support updated interpretations and models of ancient plate boundaries and plate motions affecting Zealandia and West Antarctica. The models combine to confidently resolve hundreds of kilometres of Late Cretaceous–Eocene motion between the Pacific and Lord Howe plates, confirming that plate circuit constructions ...
Graeme Eagles
wiley   +1 more source