Aeromagnetic map compilation: procedures for merging and an example from Washington
Rocks in Antarctica and offshore have widely diverse magnetic properties. Consequently, aeromagnetic data collected there can improve knowledge of the geologic, tectonic and geothermal characteristics of the region. Aeromagnetic data can map concealed structures such as faults, folds and dikes, asce...
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ftingv:oai:www.earth-prints.org:2122/1383 2024-06-09T07:40:39+00:00 Aeromagnetic map compilation: procedures for merging and an example from Washington Finn, C. Finn, C.; U.S. Geological Survey, Denver Federal Center, Denver, CO 80225, U.S.A U.S. Geological Survey, Denver Federal Center, Denver, CO 80225, U.S.A 1999-04 1771829 bytes application/pdf http://hdl.handle.net/2122/1383 en eng 2/42 (1999) http://hdl.handle.net/2122/1383 open aeromagnetic data Antartica 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous article 1999 ftingv 2024-05-15T08:04:29Z Rocks in Antarctica and offshore have widely diverse magnetic properties. Consequently, aeromagnetic data collected there can improve knowledge of the geologic, tectonic and geothermal characteristics of the region. Aeromagnetic data can map concealed structures such as faults, folds and dikes, ascertain basin thickness and locate buried volcanic, as well as some intrusive and metamorphic rocks. Gridded, composite data sets allow a view of continental-scale trends that individual data sets do not provide and link widely-separated areas of outcrop and disparate geologic studies. Individual magnetic surveys must be processed so that they match adjacent surveys prior to merging. A consistent representation of the Earth's magnetic field (International Geomagnetic Reference Field (IGRF)) must be removed from each data set. All data sets need to be analytically continued to the same flight elevation with their datums shifted to match adjacent data. I advocate minimal processing to best represent the individual surveys in the merged compilation. An example of a compilation of aeromagnetic surveys from Washington illustrates the utility of aeromagnetic maps for providing synoptic views of regional tectonic features. JCR Journal open Article in Journal/Newspaper Antarc* Antarctica antartic* Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
topic |
aeromagnetic data Antartica 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous |
spellingShingle |
aeromagnetic data Antartica 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous Finn, C. Aeromagnetic map compilation: procedures for merging and an example from Washington |
topic_facet |
aeromagnetic data Antartica 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous |
description |
Rocks in Antarctica and offshore have widely diverse magnetic properties. Consequently, aeromagnetic data collected there can improve knowledge of the geologic, tectonic and geothermal characteristics of the region. Aeromagnetic data can map concealed structures such as faults, folds and dikes, ascertain basin thickness and locate buried volcanic, as well as some intrusive and metamorphic rocks. Gridded, composite data sets allow a view of continental-scale trends that individual data sets do not provide and link widely-separated areas of outcrop and disparate geologic studies. Individual magnetic surveys must be processed so that they match adjacent surveys prior to merging. A consistent representation of the Earth's magnetic field (International Geomagnetic Reference Field (IGRF)) must be removed from each data set. All data sets need to be analytically continued to the same flight elevation with their datums shifted to match adjacent data. I advocate minimal processing to best represent the individual surveys in the merged compilation. An example of a compilation of aeromagnetic surveys from Washington illustrates the utility of aeromagnetic maps for providing synoptic views of regional tectonic features. JCR Journal open |
author2 |
Finn, C.; U.S. Geological Survey, Denver Federal Center, Denver, CO 80225, U.S.A U.S. Geological Survey, Denver Federal Center, Denver, CO 80225, U.S.A |
format |
Article in Journal/Newspaper |
author |
Finn, C. |
author_facet |
Finn, C. |
author_sort |
Finn, C. |
title |
Aeromagnetic map compilation: procedures for merging and an example from Washington |
title_short |
Aeromagnetic map compilation: procedures for merging and an example from Washington |
title_full |
Aeromagnetic map compilation: procedures for merging and an example from Washington |
title_fullStr |
Aeromagnetic map compilation: procedures for merging and an example from Washington |
title_full_unstemmed |
Aeromagnetic map compilation: procedures for merging and an example from Washington |
title_sort |
aeromagnetic map compilation: procedures for merging and an example from washington |
publishDate |
1999 |
url |
http://hdl.handle.net/2122/1383 |
genre |
Antarc* Antarctica antartic* |
genre_facet |
Antarc* Antarctica antartic* |
op_relation |
2/42 (1999) http://hdl.handle.net/2122/1383 |
op_rights |
open |
_version_ |
1801384012409733120 |