Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47
During the first section of the "Meteor" cruise No. 2 a profile was run from the Azores to the south across the flanks of the Mid-Atlantic Ridge with a chain of seamounts. The profile extended between the Cruiser (living) and the Hyeres seamounts, which, according to our soundings, form a...
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1970
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ftdatacite:10.1594/pangaea.548400 2023-05-15T17:37:16+02:00 Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 Fleischer, U Meyer, O Schaaf, H 1970 application/zip https://dx.doi.org/10.1594/pangaea.548400 https://doi.pangaea.de/10.1594/PANGAEA.548400 en eng PANGAEA - Data Publisher for Earth & Environmental Science Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Magnetometer M2 Meteor 1964 article Supplementary Collection of Datasets Collection 1970 ftdatacite https://doi.org/10.1594/pangaea.548400 2022-02-09T13:16:26Z During the first section of the "Meteor" cruise No. 2 a profile was run from the Azores to the south across the flanks of the Mid-Atlantic Ridge with a chain of seamounts. The profile extended between the Cruiser (living) and the Hyeres seamounts, which, according to our soundings, form a connected massif, and across the centre of the Grosse Meteor Bank (30°N, 28.5 °W). These seamounts rise from a depth of more than 4000 m up till close to the surface of the sea forming there a large almost flat plateau. In the case of the Grosse Meteor Bank, this plateau has a N-S extension of approx. 30 nautical miles and an E-W extension of approx. 20 nautical miles and reaches a height of 275 m in water depth.The gravity measurements yielded a density of the topographic masses of 2.6 g/cm**3 for the Grosse Meteor Bank. Magnitude and shape of the measured free-air anomaly are very well shown in a model computation with this density. The theoretical gravity effects of the seismically detected swell of cristalline rock and of the Moho depression (mountain root) are not indicated by the observational data. It can, therefore, be assumed that the latter two neutralize each other. It seems, accordingly, that there is no local isostatic compensation of the topographic masses. Hence, the density of 2.6 g/cm**3 obtained would be about the true density of rock. In connection with the mean velocity of P waves (Aric et al., 1968) obtained by seismic refraction methods it must be concluded that the material of the 1200-4000 m thick surface layer of the Grosse Meteor Bank consists of consolidated sediments.This finding is supported by the total intensity of the Earth's magnetic field over the Grosse Meteor Bank. On the assumption of a homogeneous magnetization in the direction of the present Earth's field, the computed anomaly of the massif deviates considerably from the measured anomaly while the magnetic field of the seismically detected crystalline body is capable of interpreting the observed data. Deviating from the prevailing interpretation of the seamounts' plateau as a volcanic cone with submarine abrasion, the Grosse Meteor Bank and the seamounts in the vicinity are assumed to be of continental origin. The questions whether these seamounts submerged later on or whether the sealevel has risen subsequently are, therefore, largely nonexistent. Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Cruiser ENVELOPE(-55.633,-55.633,-61.133,-61.133) Meteor Bank ENVELOPE(8.500,8.500,-48.000,-48.000) Mid-Atlantic Ridge |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Magnetometer M2 Meteor 1964 |
spellingShingle |
Magnetometer M2 Meteor 1964 Fleischer, U Meyer, O Schaaf, H Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 |
topic_facet |
Magnetometer M2 Meteor 1964 |
description |
During the first section of the "Meteor" cruise No. 2 a profile was run from the Azores to the south across the flanks of the Mid-Atlantic Ridge with a chain of seamounts. The profile extended between the Cruiser (living) and the Hyeres seamounts, which, according to our soundings, form a connected massif, and across the centre of the Grosse Meteor Bank (30°N, 28.5 °W). These seamounts rise from a depth of more than 4000 m up till close to the surface of the sea forming there a large almost flat plateau. In the case of the Grosse Meteor Bank, this plateau has a N-S extension of approx. 30 nautical miles and an E-W extension of approx. 20 nautical miles and reaches a height of 275 m in water depth.The gravity measurements yielded a density of the topographic masses of 2.6 g/cm**3 for the Grosse Meteor Bank. Magnitude and shape of the measured free-air anomaly are very well shown in a model computation with this density. The theoretical gravity effects of the seismically detected swell of cristalline rock and of the Moho depression (mountain root) are not indicated by the observational data. It can, therefore, be assumed that the latter two neutralize each other. It seems, accordingly, that there is no local isostatic compensation of the topographic masses. Hence, the density of 2.6 g/cm**3 obtained would be about the true density of rock. In connection with the mean velocity of P waves (Aric et al., 1968) obtained by seismic refraction methods it must be concluded that the material of the 1200-4000 m thick surface layer of the Grosse Meteor Bank consists of consolidated sediments.This finding is supported by the total intensity of the Earth's magnetic field over the Grosse Meteor Bank. On the assumption of a homogeneous magnetization in the direction of the present Earth's field, the computed anomaly of the massif deviates considerably from the measured anomaly while the magnetic field of the seismically detected crystalline body is capable of interpreting the observed data. Deviating from the prevailing interpretation of the seamounts' plateau as a volcanic cone with submarine abrasion, the Grosse Meteor Bank and the seamounts in the vicinity are assumed to be of continental origin. The questions whether these seamounts submerged later on or whether the sealevel has risen subsequently are, therefore, largely nonexistent. |
format |
Article in Journal/Newspaper |
author |
Fleischer, U Meyer, O Schaaf, H |
author_facet |
Fleischer, U Meyer, O Schaaf, H |
author_sort |
Fleischer, U |
title |
Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 |
title_short |
Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 |
title_full |
Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 |
title_fullStr |
Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 |
title_full_unstemmed |
Magnetic and gravity measurements on North-South profiles across the Grosse Meteor Bank, North Atlantic, supplement to: Fleischer, U; Meyer, O; Schaaf, H (1970): Über den Aufbau der untermeerischen Tafelberge südlich der Azoren an Hand eines gravimetrisch-magnetischen Nord-Süd-Profils über die Große Meteor-Bank. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 37-47 |
title_sort |
magnetic and gravity measurements on north-south profiles across the grosse meteor bank, north atlantic, supplement to: fleischer, u; meyer, o; schaaf, h (1970): über den aufbau der untermeerischen tafelberge südlich der azoren an hand eines gravimetrisch-magnetischen nord-süd-profils über die große meteor-bank. meteor forschungsergebnisse, deutsche forschungsgemeinschaft, reihe c geologie und geophysik, gebrüder bornträger, berlin, stuttgart, c3, 37-47 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1970 |
url |
https://dx.doi.org/10.1594/pangaea.548400 https://doi.pangaea.de/10.1594/PANGAEA.548400 |
long_lat |
ENVELOPE(-55.633,-55.633,-61.133,-61.133) ENVELOPE(8.500,8.500,-48.000,-48.000) |
geographic |
Cruiser Meteor Bank Mid-Atlantic Ridge |
geographic_facet |
Cruiser Meteor Bank Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.548400 |
_version_ |
1766137076229603328 |