Analysis of Noise Coherence in Airborne Magnetic Gradients for UXO Detection

2003 ◽  
Author(s):  
T. Jeffrey Gamey ◽  
William E. Doll ◽  
Les P. Beard ◽  
David T. Bell
Keyword(s):  
Magnetic Gradients ◽  
Airborne Magnetic

Analysis Of Noise Coherence In Airborne Magnetic Gradients For Uxo Detection

2003 ◽  
Author(s):  
T. Jeffrey Gamey ◽  
William E. Doll ◽  
Les P. Beard ◽  
David T. Bell
Keyword(s):  
Magnetic Gradients ◽  
Airborne Magnetic

Analysis of noise coherence in airborne magnetic gradients for UXO detection

2003 ◽  
Author(s):  
T. J. Gamey ◽  
W. E. Doll ◽  
L. P. Beard ◽  
D. T. Bell
Keyword(s):  
Magnetic Gradients ◽  
Airborne Magnetic

THE GULF AIRBORNE MAGNETIC GRADIOMETER

Geophysics ◽  
1954 ◽  
Vol 19 (1) ◽  
pp. 116-123 ◽  
Author(s):  
W. E. Wickerham
Keyword(s):  
Qualitative Analysis ◽  
Time Derivative ◽  
Magnetic Intensity ◽  
Magnetic Gradients ◽  
Airborne Magnetic

An instrument capable of measuring magnetic gradients as encountered in airborne magnetometer operations has possible applications as an interpretational aid. Its usefulness, particularly for qualitative analysis, will be discussed briefly. The design of a spatial‐type airborne gradiometer of adequate precision can be shown to be quite impractical. An instrument based on the time derivative of the magnetic intensity variations provides a useful alternative and is described.

A discussion concerning the floor of the northwest Indian Ocean - An area on the crest of the Carlsberg Ridge: petrology and magnetic survey

1966 ◽  
Vol 259 (1099) ◽  
pp. 198-217 ◽  
Keyword(s):  
Remanent Magnetization ◽  
Ultramafic Rocks ◽  
Magnetic Survey ◽  
Vector Fitting ◽  
Uniform Magnetization ◽  
Ocean Floor Spreading ◽  
Carlsberg Ridge ◽  
History Of ◽  
Magnetic Gradients ◽  
Basalt Glasses

Rocks collected in the vicinity of a transcurrent fault cutting the crest of the Ridge have been affected by brecciation and, in some cases, metamorphism and hydrothermal action. These processes have led to the formation of spilites from crystalline basalts, and ultramafic rocks from basalt glasses Further hydrothermal action has taken the form of replacement of some ultramafic rocks by quartz, ending in a nearly pure quartzite. The mineralogy is characteristic of greenschist facies meta-morphism. Fresh basalts were collected from a nearby hill, which seems to be a recent volcano post-dating the faulting and metamorphism. The magnetic survey reveals a marked parallelism between the anomalies and the trend of the ridge, regardless of bathymetry. Computations confirm that uniform magnetization of the material represented by the bathymetry can in no way simulate the observed anomalies. Application of the vector fitting technique suggests that the remanent magnetization of this material is often reversed and from this a very crude and simple model is developed to account for the observed anomalies. The model is consistent with an ocean floor spreading hypothesis and periodic reversals in the earth's magnetic field. If substantiated it would have important implications in deducing the history of the ocean basins. Above all it provides a plausible explanation to account for the magnetic gradients and amplitudes observed over ridges without implying improbable magnetic contrasts, structures, or changes in petrology.

Airborne magnetic and radiometric mapping for litho-structural settings and its significance for bitumen mineralization over Agbabu bitumen-belt southwestern Nigeria

2021 ◽  
pp. 104222
Author(s):  
Ajibola Richard Faruwa ◽  
Wei Qian ◽  
Oladotun Seyi Obafunmilayo ◽  
Babatunde Bunmi Daramola ◽  
Mosaad Ali ◽  
...  
Keyword(s):  
Southwestern Nigeria ◽  
Airborne Magnetic

AIRBORNE MAGNETIC PROFILE ABOVE 40TH PARALLEL, EASTERN COLORADO TO WESTERN INDIANA

Geophysics ◽  
1949 ◽  
Vol 14 (1) ◽  
pp. 57-57 ◽  
Author(s):  
Homer Jensen
Keyword(s):  
Return Trip ◽  
Magnetic Profile ◽  
Airborne Magnetic

On the return trip from the Geophysical Meetings in Denver in the spring of 1948, the Gulf magnetometer in the Aero Service Corporation DC‐3 magnetometer survey plane was operated continuously from a point near Adena, Colorado, to the vicinity of Indianapolis, Indiana, as part of a program of running long lines in the course of routine transfer of survey airplanes.

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