Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge
The geophysical findings from Fletcher's Ice Island (T-3) for the period mid-1962 to mid-1970 are presented. During this time the ice station traversed the Chukchi Rise, portions of the Alpha Cordillera and Mendeleyev Ridge, and the Chukchi, Mendeleyev, and Canada Plains. The findings, together...
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ftdtic:AD0715656 2023-05-15T14:57:44+02:00 Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge Hall, John K. LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY 1970-11 text/html http://www.dtic.mil/docs/citations/AD0715656 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0715656 en eng http://www.dtic.mil/docs/citations/AD0715656 Approved for public release; distribution is unlimited. Document partially illegible. DTIC AND NTIS Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy *OCEAN BOTTOM TOPOGRAPHY *ARCTIC OCEAN *MARINE GEOPHYSICS REFLECTION FAULTS(GEOLOGY) GRAVITY REFRACTION GEOLOGIC AGE DETERMINATION BATHYTHERMOGRAPH DATA SEDIMENTATION ECHO RANGING OCEANIC CRUST MAGNETIC ANOMALY DETECTION MEASUREMENT DEPTH FINDING COMPUTER PROGRAMS ANOMALIES OCEAN BOTTOM SPREADING ALPHA CORDILLERA SEISMIC PROFILES Text 1970 ftdtic 2016-02-22T20:13:48Z The geophysical findings from Fletcher's Ice Island (T-3) for the period mid-1962 to mid-1970 are presented. During this time the ice station traversed the Chukchi Rise, portions of the Alpha Cordillera and Mendeleyev Ridge, and the Chukchi, Mendeleyev, and Canada Plains. The findings, together with pertinent observations from older investigations, support the suggestion of earlier investigators that the Alpha Cordillera is an inactive center of seafloor spreading. Several fractures were observed to cut the Mendeleyev Ridge and Alpha Cordillera, and many other closely spaced fractures are suggested by topographic, magnetic, and gravity trends. These fractures appear to parallel the 142 degrees West meridian. Seismic reflection profiles show a buried topography similar to that of the Mid-Atlantic Ridge. Offsets in the apparent axial rift suggest that the fractures are the traces of transform faults. The angular relationship between the Mendeleyev Ridge and the Alpha Cordillera appears to result from a southerly displacement of the cordillera crest along numerous en echelon transform faults. Magnetic anomalies are consistent with the seafloor spreading hypothesis. Text Arctic Arctic Ocean Chukchi Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Canada Mid-Atlantic Ridge Mendeleyev ENVELOPE(14.517,14.517,-71.900,-71.900) Mendeleyev Ridge ENVELOPE(-178.000,-178.000,80.000,80.000) Chukchi Rise ENVELOPE(-165.000,-165.000,78.000,78.000) Alpha Cordillera ENVELOPE(-125.000,-125.000,85.500,85.500) |
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 *OCEAN BOTTOM TOPOGRAPHY *ARCTIC OCEAN *MARINE GEOPHYSICS REFLECTION FAULTS(GEOLOGY) GRAVITY REFRACTION GEOLOGIC AGE DETERMINATION BATHYTHERMOGRAPH DATA SEDIMENTATION ECHO RANGING OCEANIC CRUST MAGNETIC ANOMALY DETECTION MEASUREMENT DEPTH FINDING COMPUTER PROGRAMS ANOMALIES OCEAN BOTTOM SPREADING ALPHA CORDILLERA SEISMIC PROFILES |
spellingShingle |
Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy *OCEAN BOTTOM TOPOGRAPHY *ARCTIC OCEAN *MARINE GEOPHYSICS REFLECTION FAULTS(GEOLOGY) GRAVITY REFRACTION GEOLOGIC AGE DETERMINATION BATHYTHERMOGRAPH DATA SEDIMENTATION ECHO RANGING OCEANIC CRUST MAGNETIC ANOMALY DETECTION MEASUREMENT DEPTH FINDING COMPUTER PROGRAMS ANOMALIES OCEAN BOTTOM SPREADING ALPHA CORDILLERA SEISMIC PROFILES Hall, John K. Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge |
topic_facet |
Physical and Dynamic Oceanography Geology Geochemistry and Mineralogy *OCEAN BOTTOM TOPOGRAPHY *ARCTIC OCEAN *MARINE GEOPHYSICS REFLECTION FAULTS(GEOLOGY) GRAVITY REFRACTION GEOLOGIC AGE DETERMINATION BATHYTHERMOGRAPH DATA SEDIMENTATION ECHO RANGING OCEANIC CRUST MAGNETIC ANOMALY DETECTION MEASUREMENT DEPTH FINDING COMPUTER PROGRAMS ANOMALIES OCEAN BOTTOM SPREADING ALPHA CORDILLERA SEISMIC PROFILES |
description |
The geophysical findings from Fletcher's Ice Island (T-3) for the period mid-1962 to mid-1970 are presented. During this time the ice station traversed the Chukchi Rise, portions of the Alpha Cordillera and Mendeleyev Ridge, and the Chukchi, Mendeleyev, and Canada Plains. The findings, together with pertinent observations from older investigations, support the suggestion of earlier investigators that the Alpha Cordillera is an inactive center of seafloor spreading. Several fractures were observed to cut the Mendeleyev Ridge and Alpha Cordillera, and many other closely spaced fractures are suggested by topographic, magnetic, and gravity trends. These fractures appear to parallel the 142 degrees West meridian. Seismic reflection profiles show a buried topography similar to that of the Mid-Atlantic Ridge. Offsets in the apparent axial rift suggest that the fractures are the traces of transform faults. The angular relationship between the Mendeleyev Ridge and the Alpha Cordillera appears to result from a southerly displacement of the cordillera crest along numerous en echelon transform faults. Magnetic anomalies are consistent with the seafloor spreading hypothesis. |
author2 |
LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY |
format |
Text |
author |
Hall, John K. |
author_facet |
Hall, John K. |
author_sort |
Hall, John K. |
title |
Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge |
title_short |
Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge |
title_full |
Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge |
title_fullStr |
Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge |
title_full_unstemmed |
Arctic Ocean Geophysical Studies: The Alpha Cordillera and Mendeleyev Ridge |
title_sort |
arctic ocean geophysical studies: the alpha cordillera and mendeleyev ridge |
publishDate |
1970 |
url |
http://www.dtic.mil/docs/citations/AD0715656 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0715656 |
long_lat |
ENVELOPE(14.517,14.517,-71.900,-71.900) ENVELOPE(-178.000,-178.000,80.000,80.000) ENVELOPE(-165.000,-165.000,78.000,78.000) ENVELOPE(-125.000,-125.000,85.500,85.500) |
geographic |
Arctic Arctic Ocean Canada Mid-Atlantic Ridge Mendeleyev Mendeleyev Ridge Chukchi Rise Alpha Cordillera |
geographic_facet |
Arctic Arctic Ocean Canada Mid-Atlantic Ridge Mendeleyev Mendeleyev Ridge Chukchi Rise Alpha Cordillera |
genre |
Arctic Arctic Ocean Chukchi |
genre_facet |
Arctic Arctic Ocean Chukchi |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0715656 |
op_rights |
Approved for public release; distribution is unlimited. Document partially illegible. |
_version_ |
1766329861443420160 |