The reduction, verification and interpretation of MAGSAT magnetic data over Canada
Correlations between the MAGSAT scalar anomaly map produced at the Earth Physics ranch and other geophysical and geological data reveal relationships between high magnetic field and some metamorphic grade shields, as well as between low magnetic field and shield regions of lower metamorphic grade. A...
Main Authors: | , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1982
|
Subjects: | |
Online Access: | http://hdl.handle.net/2060/19820017716 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19820017716 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19820017716 2023-05-15T13:20:23+02:00 The reduction, verification and interpretation of MAGSAT magnetic data over Canada Walker, J. K. Coles, R. L. Vanbeek, G. J. Haines, G. V. Nandi, A. Newitt, L. R. Unclassified, Unlimited, Publicly available Apr 1, 1982 application/pdf http://hdl.handle.net/2060/19820017716 unknown Document ID: 19820017716 Accession ID: 82N25592 http://hdl.handle.net/2060/19820017716 No Copyright CASI EARTH RESOURCES AND REMOTE SENSING E82-10302 NASA-CR-168877 NAS 1.26:168877 PR-5 1982 ftnasantrs 2019-07-21T10:15:58Z Correlations between the MAGSAT scalar anomaly map produced at the Earth Physics ranch and other geophysical and geological data reveal relationships between high magnetic field and some metamorphic grade shields, as well as between low magnetic field and shield regions of lower metamorphic grade. An intriguing contrast exists between the broad low anomaly field over the Nasen-Gakkel Ridge (a spreading plate margin) and the high anomaly field over Iceland (part of a spreading margin). Both regions have high heat flow, and presumably thin magnetic crust. This indicates that Iceland is quite anomalous in its magnetic character, and possible similarities with the Alpha Ridge are suggested. Interesting correlations exist between MAGSAT anomalies around the North Atlantic, after reconstructing the fit of continents into a prerifting configuration. These correlations suggest that several orogenies in that region have not completely destroyed an ancient magnetization formed in high grade Precambrian rocks. Other/Unknown Material alpha ridge Iceland North Atlantic NASA Technical Reports Server (NTRS) Canada Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Alpha Ridge ENVELOPE(-120.000,-120.000,85.500,85.500) Nasen ENVELOPE(8.521,8.521,62.595,62.595) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
EARTH RESOURCES AND REMOTE SENSING |
spellingShingle |
EARTH RESOURCES AND REMOTE SENSING Walker, J. K. Coles, R. L. Vanbeek, G. J. Haines, G. V. Nandi, A. Newitt, L. R. The reduction, verification and interpretation of MAGSAT magnetic data over Canada |
topic_facet |
EARTH RESOURCES AND REMOTE SENSING |
description |
Correlations between the MAGSAT scalar anomaly map produced at the Earth Physics ranch and other geophysical and geological data reveal relationships between high magnetic field and some metamorphic grade shields, as well as between low magnetic field and shield regions of lower metamorphic grade. An intriguing contrast exists between the broad low anomaly field over the Nasen-Gakkel Ridge (a spreading plate margin) and the high anomaly field over Iceland (part of a spreading margin). Both regions have high heat flow, and presumably thin magnetic crust. This indicates that Iceland is quite anomalous in its magnetic character, and possible similarities with the Alpha Ridge are suggested. Interesting correlations exist between MAGSAT anomalies around the North Atlantic, after reconstructing the fit of continents into a prerifting configuration. These correlations suggest that several orogenies in that region have not completely destroyed an ancient magnetization formed in high grade Precambrian rocks. |
format |
Other/Unknown Material |
author |
Walker, J. K. Coles, R. L. Vanbeek, G. J. Haines, G. V. Nandi, A. Newitt, L. R. |
author_facet |
Walker, J. K. Coles, R. L. Vanbeek, G. J. Haines, G. V. Nandi, A. Newitt, L. R. |
author_sort |
Walker, J. K. |
title |
The reduction, verification and interpretation of MAGSAT magnetic data over Canada |
title_short |
The reduction, verification and interpretation of MAGSAT magnetic data over Canada |
title_full |
The reduction, verification and interpretation of MAGSAT magnetic data over Canada |
title_fullStr |
The reduction, verification and interpretation of MAGSAT magnetic data over Canada |
title_full_unstemmed |
The reduction, verification and interpretation of MAGSAT magnetic data over Canada |
title_sort |
reduction, verification and interpretation of magsat magnetic data over canada |
publishDate |
1982 |
url |
http://hdl.handle.net/2060/19820017716 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(-120.000,-120.000,85.500,85.500) ENVELOPE(8.521,8.521,62.595,62.595) |
geographic |
Canada Gakkel Ridge Alpha Ridge Nasen |
geographic_facet |
Canada Gakkel Ridge Alpha Ridge Nasen |
genre |
alpha ridge Iceland North Atlantic |
genre_facet |
alpha ridge Iceland North Atlantic |
op_source |
CASI |
op_relation |
Document ID: 19820017716 Accession ID: 82N25592 http://hdl.handle.net/2060/19820017716 |
op_rights |
No Copyright |
_version_ |
1766353169543069696 |