Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean
As part of the Fram 2 experiment six refraction lines were shot in the Pole Abyssal Plain or Fram Basin of the eastern Arctic Ocean. During the Fram 4 experiment four refraction lines were also shot in the Nansen basin just northeast of the Yermak Plateau. The Fram 2 lines at 86 deg N, 24 deg W cove...
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ftdtic:ADA196424 2023-05-15T14:51:14+02:00 Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean Duckworth, Gregory L. Baggeroer, Arthur B. MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES 1985 text/html http://www.dtic.mil/docs/citations/ADA196424 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA196424 en eng http://www.dtic.mil/docs/citations/ADA196424 Approved for public release; distribution is unlimited. DTIC AND NTIS Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy Seismic Detection and Detectors *SEAFLOOR SPREADING *DATA PROCESSING *OCEANIC CRUST *SEISMIC DATA MODELS TWO DIMENSIONAL HIGH RESOLUTION DEPTH SPECTRA INVERSION REFRACTION ABYSSAL ZONES OCEAN BOTTOM TOPOGRAPHY SEA ICE OCEAN RIDGES EAST(DIRECTION) SEISMIC ARRAYS MULTICHANNEL MAGNETIC ANOMALIES METHODOLOGY REPRINTS ARCTIC OCEAN SHEAR PROPERTIES VELOCITY OCEAN BASINS ABYSSAL PLAINS SEISMIC REFRACTION ARRAY PROCESSING SEISMIC VELOCITY Text 1985 ftdtic 2016-02-23T08:53:41Z As part of the Fram 2 experiment six refraction lines were shot in the Pole Abyssal Plain or Fram Basin of the eastern Arctic Ocean. During the Fram 4 experiment four refraction lines were also shot in the Nansen basin just northeast of the Yermak Plateau. The Fram 2 lines at 86 deg N, 24 deg W cover both the abyssal plain region and the northern flank of the Morris Jessup Rise near magnetic anomalies 22 and 23. The Fram 4 lines near 83 deg N, 15 - 20 deg E are on slightly younger crust at anomaly 12. This paper introduces new methods for processing and inversion of Arctic refraction data and contrasts the results from these tectonically similar regions on opposite sides of the spreading center at the Arctic Mid-Ocean (Nansen) Ridge. In both experiments the data were recorded digitally on a two-dimensional array of 24 hydrophones located 93 m below the floe camps. These multi-channel data are processed by high-resolution array processing techniques to yield velocity spectra over the short 1 km apertures of the arrays. These velocity spectra are transformed to tau-slowness and offset-slowness parameterizations and are inverted by 1) velocity-depth migration, 2) tau-sum, and 3) extremal inversion techniques to obtain crustal velocity models down to the Moho. Without the ability of the array processing to discern late breaking primaries, multiples, and shear arrivals, the sparsely shot lines with 5-15 offsets over the 30-100 km line lengths would not be invertible by these methods. Reprints. Pub. in Tectonophysics, v114 p55-102 1985. No copies furnished by DTIC/NTIS. Text Arctic Arctic Ocean Nansen Basin Sea ice Yermak plateau Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Fram Basin ENVELOPE(90.000,90.000,88.000,88.000) Pole Abyssal Plain ENVELOPE(127.500,127.500,85.417,85.417) Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy Seismic Detection and Detectors *SEAFLOOR SPREADING *DATA PROCESSING *OCEANIC CRUST *SEISMIC DATA MODELS TWO DIMENSIONAL HIGH RESOLUTION DEPTH SPECTRA INVERSION REFRACTION ABYSSAL ZONES OCEAN BOTTOM TOPOGRAPHY SEA ICE OCEAN RIDGES EAST(DIRECTION) SEISMIC ARRAYS MULTICHANNEL MAGNETIC ANOMALIES METHODOLOGY REPRINTS ARCTIC OCEAN SHEAR PROPERTIES VELOCITY OCEAN BASINS ABYSSAL PLAINS SEISMIC REFRACTION ARRAY PROCESSING SEISMIC VELOCITY |
spellingShingle |
Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy Seismic Detection and Detectors *SEAFLOOR SPREADING *DATA PROCESSING *OCEANIC CRUST *SEISMIC DATA MODELS TWO DIMENSIONAL HIGH RESOLUTION DEPTH SPECTRA INVERSION REFRACTION ABYSSAL ZONES OCEAN BOTTOM TOPOGRAPHY SEA ICE OCEAN RIDGES EAST(DIRECTION) SEISMIC ARRAYS MULTICHANNEL MAGNETIC ANOMALIES METHODOLOGY REPRINTS ARCTIC OCEAN SHEAR PROPERTIES VELOCITY OCEAN BASINS ABYSSAL PLAINS SEISMIC REFRACTION ARRAY PROCESSING SEISMIC VELOCITY Duckworth, Gregory L. Baggeroer, Arthur B. Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean |
topic_facet |
Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy Seismic Detection and Detectors *SEAFLOOR SPREADING *DATA PROCESSING *OCEANIC CRUST *SEISMIC DATA MODELS TWO DIMENSIONAL HIGH RESOLUTION DEPTH SPECTRA INVERSION REFRACTION ABYSSAL ZONES OCEAN BOTTOM TOPOGRAPHY SEA ICE OCEAN RIDGES EAST(DIRECTION) SEISMIC ARRAYS MULTICHANNEL MAGNETIC ANOMALIES METHODOLOGY REPRINTS ARCTIC OCEAN SHEAR PROPERTIES VELOCITY OCEAN BASINS ABYSSAL PLAINS SEISMIC REFRACTION ARRAY PROCESSING SEISMIC VELOCITY |
description |
As part of the Fram 2 experiment six refraction lines were shot in the Pole Abyssal Plain or Fram Basin of the eastern Arctic Ocean. During the Fram 4 experiment four refraction lines were also shot in the Nansen basin just northeast of the Yermak Plateau. The Fram 2 lines at 86 deg N, 24 deg W cover both the abyssal plain region and the northern flank of the Morris Jessup Rise near magnetic anomalies 22 and 23. The Fram 4 lines near 83 deg N, 15 - 20 deg E are on slightly younger crust at anomaly 12. This paper introduces new methods for processing and inversion of Arctic refraction data and contrasts the results from these tectonically similar regions on opposite sides of the spreading center at the Arctic Mid-Ocean (Nansen) Ridge. In both experiments the data were recorded digitally on a two-dimensional array of 24 hydrophones located 93 m below the floe camps. These multi-channel data are processed by high-resolution array processing techniques to yield velocity spectra over the short 1 km apertures of the arrays. These velocity spectra are transformed to tau-slowness and offset-slowness parameterizations and are inverted by 1) velocity-depth migration, 2) tau-sum, and 3) extremal inversion techniques to obtain crustal velocity models down to the Moho. Without the ability of the array processing to discern late breaking primaries, multiples, and shear arrivals, the sparsely shot lines with 5-15 offsets over the 30-100 km line lengths would not be invertible by these methods. Reprints. Pub. in Tectonophysics, v114 p55-102 1985. No copies furnished by DTIC/NTIS. |
author2 |
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES |
format |
Text |
author |
Duckworth, Gregory L. Baggeroer, Arthur B. |
author_facet |
Duckworth, Gregory L. Baggeroer, Arthur B. |
author_sort |
Duckworth, Gregory L. |
title |
Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean |
title_short |
Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean |
title_full |
Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean |
title_fullStr |
Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean |
title_full_unstemmed |
Inversion of Refraction Data from the Fram and Nansen Basins of the Arctic Ocean |
title_sort |
inversion of refraction data from the fram and nansen basins of the arctic ocean |
publishDate |
1985 |
url |
http://www.dtic.mil/docs/citations/ADA196424 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA196424 |
long_lat |
ENVELOPE(90.000,90.000,88.000,88.000) ENVELOPE(127.500,127.500,85.417,85.417) ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Fram Basin Pole Abyssal Plain Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Fram Basin Pole Abyssal Plain Yermak Plateau |
genre |
Arctic Arctic Ocean Nansen Basin Sea ice Yermak plateau |
genre_facet |
Arctic Arctic Ocean Nansen Basin Sea ice Yermak plateau |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA196424 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766322281991110656 |