Generation of a New High Resolution Magnetic Database for Europe for Resource Evaluation – Progress Report

Fletcher, K.M.U.; Fairhead, J. D.; Lei, Kaxia; Salem, Ahmed; Ayala, C.; Cabanillas, P. L. M.

doi:10.3997/2214-4609.201400747

Cited by 8 publications

(13 citation statements)

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“…Ground magnetometer data are used for aeromagnetic [e.g., Pilkington , ] and marine magnetic [e.g., Tivey , ] surveys that are undertaken for mineral exploration [e.g., Fletcher et al , ] and geological investigation. Before performing a survey, a check is made of forecasted geomagnetic disturbance; if this exceeds a given threshold, such as given by a local K index, then the survey might be postponed until quiescent conditions are expected to return [e.g., Watermann et al , ].…”

Section: Priority Operational Applicationsmentioning

confidence: 99%

Real‐time geomagnetic monitoring for space weather‐related applications: Opportunities and challenges

Love

Finn

2017

Space Weather

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An examination is made of opportunities and challenges for enhancing global, real‐time geomagnetic monitoring that would be beneficial for a variety of operational projects. This enhancement in geomagnetic monitoring can be attained by expanding the geographic distribution of magnetometer stations, improving the quality of magnetometer data, increasing acquisition sampling rates, increasing the promptness of data transmission, and facilitating access to and use of the data. Progress will benefit from new partnerships to leverage existing capacities and harness multisector, cross‐disciplinary, and international interests.

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Section: Priority Operational Applicationsmentioning

confidence: 99%

Real‐time geomagnetic monitoring for space weather‐related applications: Opportunities and challenges

Love

Finn

2017

Space Weather

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“…Aeromagnetic data used in this work were made available by Getech, as part of the European and Mediterranean Magnetic Project (EMMP) [ Fletcher et al ., ]. EMMP aimed to bring together all available magnetic data (ground, air and marine, profiles, and data network) to yield a high‐resolution total magnetic intensity field grid of 1 km grid size.…”

Section: Aeromagnetic Anomalies In Central Europementioning

confidence: 99%

“…Finally, since this compilation has been derived by meshing together different small data sets of a large‐scale area, the long‐wavelength component have been replaced with the 15 arc min grid of MF7 total intensity anomaly satellite model [ Maus et al ., ] by applying a fourth‐order Butterworth band‐pass filter with cutoffs of 300 km and 500 km to both terrestrial compilation and satellite grids (see Fletcher et al . [] for more details).…”

Section: Aeromagnetic Anomalies In Central Europementioning

confidence: 99%

The deep crust beneath the Trans‐European Suture Zone from a multiscale magnetic model

Milano

Fedi

Fairhead³

2016

JGR Solid Earth

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We present a 3‐D interpretation of the deep magnetic sources beneath the main geological structure of central‐eastern Europe, the “Trans‐European Suture Zone” (TESZ). We used a multiscale analysis of aeromagnetic data, based on a multiscale data set generated by upward continuation of the European and Mediterranean Magnetic Project data set from 5 to 100 km altitude. We also computed the multiscale total gradient |∇T| of the multiscale field. Both of the multiscale data sets allow us to discriminate the main crustal contributions to the field at various scales, and we showed that at large altitudes the field is dominated by the sole effect of the TESZ. The multiridge geometric method was very useful in studying the complex features of the main crustal interfaces, either shallow or deep. The interpreted interfaces are largely agreement with geological models based on seismic surveys and, in some cases, complete the models out of the analyzed region. In order to estimate the deepest source depths in the TESZ region, we applied the multiridge method to the large scales (50–100 km altitude), obtaining a set of singular points at depths ranging between 35 and 40 km. Considering the heat flow trend and the geological models around the TESZ area, we found a meaningful correspondence among the location of the estimated singular points and the most abrupt variations and complex morphology features of the Moho boundary. The multiridge estimates are consistent with known structural information and can be used for a 3‐D representation of the Moho depth along the TESZ.

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“…The magnetic profile data (Fig. 4a) were sampled at an interval of 1 km from the recent compilation of the new 1 km unified upward continued magnetic data base for Europe (Fletcher et al 2011).…”

Section: Applicationmentioning

confidence: 99%

Interpretation of magnetic data over tilted basement blocks: an example from the northern North Sea

Salem

2011

Geophysical Prospecting

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A B S T R A C TThis paper presents a procedure for interpreting magnetic data over tilted basement blocks. The objective of this procedure is to estimate source parameters of a tilted basement block from first-order derivatives of magnetic profile data. The method uses a model consisting of two superimposed infinite contacts with opposite dip. The procedure estimates the location of the crest (intersection of the two contacts) and the susceptibility contrast of the basement block from the total gradient anomaly data using a linear least-squares method. Dip angles of the two contacts are estimated using iterative forward modelling of the tilt derivative anomaly data. The practical utility of the proposed approach is demonstrated using theoretical data and a field example from the northern North Sea.

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Generation of a New High Resolution Magnetic Database for Europe for Resource Evaluation – Progress Report

Cited by 8 publications

References 0 publications

Real‐time geomagnetic monitoring for space weather‐related applications: Opportunities and challenges

Real‐time geomagnetic monitoring for space weather‐related applications: Opportunities and challenges

The deep crust beneath the Trans‐European Suture Zone from a multiscale magnetic model

Interpretation of magnetic data over tilted basement blocks: an example from the northern North Sea

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