Results 211 to 220 of about 8,020,576 (226)

Long wavelength magnetic anomalies from the lithosphere: Indian shield and Himalaya

Tectonophysics, 1984
Abstract A few long-range airborne magnetic profiles flown at an altitude of 7.5 km a.s.l. across the Indian shield are analysed and interpreted in terms of magnetization in the lower crust. The wavelengths of the crustal anomalies are in the range of 51–255 km and this is used to separate them from signals originating at shallow depths.
D C Mishra
openaire   +3 more sources

Acquisition of long wavelength magnetic anomalies pre-dates continental drift

Physics of the Earth and Planetary Interiors, 1983
Abstract Using the low altitude MAGSAT satellite data, NASA recently published a new global magnetic map of anomalies. Using this new accurate map and paleomagnetic reconstructions of Gondwanaland, we point out that long wavelength anomalies were continuous in continents that are presently separated.
openaire   +3 more sources

Forward modeling of long-wavelength magnetic anomalies from the upper mantle

SEG Technical Program Expanded Abstracts 2016, 2016
Long-wavelength magnetic anomalies (LWMA) are broad scale magnetic fields that are usually observed at satellite altitudes. The origin of these fields have been assumed to be solely from the crust, disregarding possible contributions from the upper mantle.
openaire   +3 more sources

Satellite magnetic anomalies with a smooth spectral transition to long wavelengths

Physics of the Earth and Planetary Interiors, 2022
Josef Sebera, Ales Bezděk, Jörg Ebbing
openaire   +3 more sources

Magnetic Anomalies, Long Wavelength

2007
openaire   +3 more sources

Interpretation of Long Wavelength Magnetic Anomalies

1981
The Earth’s magnetic field (emf) measured at or above the Earth’s surface has two main components of internal origin: a primary (or main) field which is originated in the outer core and appears as large scale features at the Earth’s surface, and a secondary field which is due to both induced and remanent magnetization of high susceptibility ...
Paolo Gasparini, Marta S. M. Mantovani, Wladimir Shukowsky   +2 more
openaire   +1 more source

Magnetization of lower crustal rocks - potential sources of long wavelength anomalies

2020
<p>The occurrence and nature of primary magnetic phases in ultramafic rocks is a subject of debate. Studies of ultramafic rocks originating in the deep crust commonly report secondary magnetic phases due to later metamorphism, serpentinization, or alteration as sources for long-wavelength anomalies.
Geertje ter Maat, Suzanne McEnroe, Nathan Church, Hirokuni Oda   +3 more
openaire   +1 more source

Long‐wavelength magnetic anomalies in the Caribbean: Plate boundaries and allochthonous continental blocks

Journal of Geophysical Research: Solid Earth, 1989
Vector magnetic anomaly maps are derived at satellite altitude from Magsat data over the Caribbean and Middle America. To minimize smoothing of the anomaly field caused by averaging the data over the whole altitude range of Magsat measurements, two maps are derived in two nonoverlapping altitude ranges: 350–420 and 420–550 km.
Jean‐Louis Counil, Jose Achache, Armand Galdeano   +2 more
openaire   +1 more source

Could the Mantle Under Island Arcs Contribute to Long Wavelength Magnetic Anomalies?

2019
Peer ...
Friedman, Sarah A., Ferré, Eric E., Martín Hernández, Fátima, Conder, James A., Feinberg, Joshua M.   +4 more
openaire   +2 more sources

11: Long-wavelength gravity and magnetic anomalies of the Lake Superior region

1982
V. W. Chandler, P. L. Bowman, W. J. Hinze, N. W. O’Hara   +3 more
openaire   +1 more source