Results 41 to 50 of about 2,756 (207)

Prediction of silicate melt viscosity from electrical conductivity : a model and its geophysical implications [PDF]

open access: yes, 2013
Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry, Geophysics, Geosystems 14 (2013):
Elsenbeck, James R.   +5 more
core   +1 more source

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

open access: yesTerra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito   +4 more
wiley   +1 more source

Geolectric field measurement, modelling and validation during geomagnetic storms in the UK

open access: yesJournal of Space Weather and Space Climate, 2021
Significant geoelectric fields are produced by the interaction of rapidly varying magnetic fields with the conductive Earth, particularly during intense geomagnetic activity.
Beggan Ciarán D.   +4 more
doaj   +1 more source

Electrical Conductivity of Amorphous and Molten CaCO3 at High Pressures and Its Implications for Mantle Conductivity Anomalies

open access: yesGeophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Impedance spectrometry experiments have been conducted on CaCO3 up to 15 GPa and 2,100 K to identify its state under high pressure. The melting temperature of CaCO3 was also determined by the falling of a Re sphere observed via X‐ray radiography. The phase transition from aragonite to the amorphous phase does not cause a leap in the Electrical
Bin Zhao   +6 more
wiley   +1 more source

Research on the three-dimensional electrical structure of the shallow portion of the southern segment of the Red River Fault (Dazhai Village)

open access: yesEarth and Planetary Physics
No earthquake of magnitude six or greater has been recorded historically in the southern segment of the Red River Fault (RRF). This absence constitutes a significant seismic gap, suggesting a risk of future strong earthquakes.
Jiong Zhang   +6 more
doaj   +1 more source

Radar Specularity Content Indicates a Strong Geothermal Heat Flow Gradient in Antarctica's South Pole Basin

open access: yesGeophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Accurate estimates of geothermal heat flow (GHF) are critical for predicting basal melting and identifying stable sites for ancient ice, yet GHF remains one of the least constrained boundary conditions for the Antarctic Ice Sheet. We evaluate nine published Antarctic GHF models against radar‐derived specularity content in the South Pole Basin (
M. Kerr, D. A. Young, S. Yan, C. Pierce
wiley   +1 more source

Geophysical Evidence of the Collisional Suture Zone in the Prydz Bay, East Antarctica

open access: yesGeophysical Research Letters
The location and origin of Neoproterozoic‐Cambrian sutures provide keys to understand the formation and evolution of the supercontinent Gondwana. The Larsemann Hills is located near a major Neoproterozoic‐Cambrian suture zone in the Prydz Belt, but has ...
Lei Fu   +6 more
doaj   +1 more source

Multiscale Analysis of Bouguer Gravity Anomalies: Unveiling the Deep Structure of Eastern Himalayan Syntaxis Faults

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
The Eastern Himalayan Syntaxis (EHS), which is located at the southeastern edge of the Qinghai–Xizang Plateau, is a key region for understanding mountain‐building and subduction processes. Bouguer gravity anomalies derived from the Earth Gravitational Model 2008 free‐air anomaly data following topographic corrections, were analyzed.
Rui Zhang   +5 more
wiley   +1 more source

Groundwater Circulation Within the Mountain Block: Combining Flow and Transport Models With Magnetotelluric Observations to Untangle Its Nested Nature

open access: yesWater Resources Research
Mountains are vital water sources for humans and ecosystems, continuously replenishing lowland aquifers through surface runoff and mountain recharge.
D. Gonzalez‐Duque   +5 more
doaj   +1 more source

Magnetotelluric regional strike [PDF]

open access: yesGEOPHYSICS, 1982
A new method for determining regional strikes from the magnetotelluric impedance tensor Z and tipper T is presented. It involves the minimization of weighted sums of the squared magnitudes of elements of Z or T over all frequencies and all stations of interest.
T. D. Gamble   +3 more
openaire   +1 more source

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