Results 11 to 20 of about 10,343 (227)

Phanerozoic Large Igneous Province, Petroleum System, and Source Rock Links

open access: yesGeophysical Monograph Series, Page 191-228., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Steven C. Bergman   +2 more
wiley  

+2 more sources

Global High-Resolution Magnetic Field Inversion Using Spherical Harmonic Representation of Tesseroids as Individual Sources

open access: yesGeosciences, 2020
In this study, we present a novel approach combining the advantages of tesseroids in representing geophysical structures though their voxel-like discretization features with a spherical harmonic representation of the magnetic field.
Eldar Baykiev   +2 more
doaj   +1 more source

A two-dimensional lithospheric magnetic anomaly field model of Egypt using the measurements from Swarm satellites

open access: yesGeodesy and Geodynamics, 2021
We use magnetic field data observed by the Swarm mission from 2014 to 2020 to construct, for the first time, a two-dimensional (2D) lithospheric magnetic anomaly model of Egypt and its surrounding area.
Adel Fathy, Essam Ghamry
doaj   +1 more source

Long-wavelength lithospheric magnetic field of China

open access: yesGeophysical Journal International, 2020
SUMMARY We present new regional models, denoted CLAS, of the Chinese lithospheric field, combining the long-wavelength information provided by satellite-derived models: CHAOS-6, MF7, LCS-1 and NGDC720, and an extremely high-quality compilation of 97 994 aeromagnetic survey data with 10 km × 10 km resolution for shorter wavelength.
Yi Jiang   +5 more
openaire   +1 more source

Carbon Speciation and Solubility in Silicate Melts

open access: yesGeophysical Monograph Series, Page 179-194., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Natalia Solomatova   +2 more
wiley  

+1 more source

Fifth‐generation lithospheric magnetic field model from CHAMP satellite measurements [PDF]

open access: yesGeochemistry, Geophysics, Geosystems, 2007
Six years of low‐orbit CHAMP satellite magnetic measurements have provided an exceptionally high‐quality data resource for lithospheric magnetic field modeling and interpretation. Here we describe the fifth‐generation satellite‐only magnetic field model MF5. The model extends to spherical harmonic degree 100.
Maus, S.   +6 more
openaire   +4 more sources

Use of along-track magnetic field differences in lithospheric field modelling [PDF]

open access: yesGeophysical Journal International, 2014
We demonstrate that first differences of polar orbiting satellite magnetic data in the along-track direction can be used to obtain high resolution models of the lithospheric field. Along-track differences approximate the north–south magnetic field gradients for non-polar latitudes.
Kotsiaros, Stavros   +2 more
openaire   +2 more sources

An equivalent source method for modelling the global lithospheric magnetic field [PDF]

open access: yesGeophysical Journal International, 2015
We present a new technique for modelling the global lithospheric magnetic field at Earth’s surface based on the estimation of equivalent potential field sources. As a demonstration we show an application to magnetic field measurements made by the CHAMP satellite during the period 2009–2010 when it was at its lowest altitude and solar activity was quiet.
Kother, Livia Kathleen   +3 more
openaire   +4 more sources

CM5, a pre-Swarm comprehensive geomagnetic field model derived from over 12yr of CHAMP, Ørsted, SAC-C and observatory data [PDF]

open access: yes, 2017
A comprehensive magnetic field model named CM5 has been derived from CHAMP, Ørsted and SAC-C satellite and observatory hourly-means data from 2000 August to 2013 January using the Swarm Level-2 Comprehensive Inversion (CI) algorithm.
Kuvshinov, Alexey   +3 more
core   +4 more sources

Non-singular spherical harmonic expressions of geomagnetic vector and gradient tensor fields in the local north-oriented reference frame [PDF]

open access: yesGeoscientific Model Development, 2015
General expressions of magnetic vector (MV) and magnetic gradient tensor (MGT) in terms of the first- and second-order derivatives of spherical harmonics at different degrees/orders are relatively complicated and singular at the poles. In this paper, we
J. Du, C. Chen, V. Lesur, L. Wang
doaj   +1 more source

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