Evaluation of feasibility of mapping seismically active faults in Alaska
The author has identified the following significant results. The Yukon-Tanana uplands north and east of Fairbanks appear, on ERTS-1 imagery, to be composed of a number of large-scale (approximately 100 kilometers square) crustal blocks. The boundaries of these blocks appear to be defined by a number...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19730011640 2023-05-15T18:48:43+02:00 Evaluation of feasibility of mapping seismically active faults in Alaska Gedney, L. D. Unclassified, Unlimited, Publicly available Mar 31, 1973 application/pdf http://hdl.handle.net/2060/19730011640 unknown Document ID: 19730011640 Accession ID: 73N20367 http://hdl.handle.net/2060/19730011640 No Copyright CASI GEOPHYSICS E73-10405 NASA-CR-131141 BMPR-4 1973 ftnasantrs 2019-07-21T11:31:16Z The author has identified the following significant results. The Yukon-Tanana uplands north and east of Fairbanks appear, on ERTS-1 imagery, to be composed of a number of large-scale (approximately 100 kilometers square) crustal blocks. The boundaries of these blocks appear to be defined by a number of northeast-striking lineaments which form the major river valleys of the area. Principal among these are the valleys of the Salcha River, the Cehan River, and the Chatanika River. These lineaments are all seismically active, and are thus presumed to be faults. This parallel set of lineaments appears to be intersected at various angles by a secondary set of faults trending generally north to south. The larger earthquakes in the area occur at the intersections of the two sets. It appears that seismicity of this part of Alaska may be conceptually represented by the grinding together of rigid blocks, with earthquakes occurring along their common boundaries and at the intersections where three or more blocks come in contact. Other/Unknown Material Alaska Yukon NASA Technical Reports Server (NTRS) Fairbanks Yukon |
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Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
GEOPHYSICS |
spellingShingle |
GEOPHYSICS Gedney, L. D. Evaluation of feasibility of mapping seismically active faults in Alaska |
topic_facet |
GEOPHYSICS |
description |
The author has identified the following significant results. The Yukon-Tanana uplands north and east of Fairbanks appear, on ERTS-1 imagery, to be composed of a number of large-scale (approximately 100 kilometers square) crustal blocks. The boundaries of these blocks appear to be defined by a number of northeast-striking lineaments which form the major river valleys of the area. Principal among these are the valleys of the Salcha River, the Cehan River, and the Chatanika River. These lineaments are all seismically active, and are thus presumed to be faults. This parallel set of lineaments appears to be intersected at various angles by a secondary set of faults trending generally north to south. The larger earthquakes in the area occur at the intersections of the two sets. It appears that seismicity of this part of Alaska may be conceptually represented by the grinding together of rigid blocks, with earthquakes occurring along their common boundaries and at the intersections where three or more blocks come in contact. |
format |
Other/Unknown Material |
author |
Gedney, L. D. |
author_facet |
Gedney, L. D. |
author_sort |
Gedney, L. D. |
title |
Evaluation of feasibility of mapping seismically active faults in Alaska |
title_short |
Evaluation of feasibility of mapping seismically active faults in Alaska |
title_full |
Evaluation of feasibility of mapping seismically active faults in Alaska |
title_fullStr |
Evaluation of feasibility of mapping seismically active faults in Alaska |
title_full_unstemmed |
Evaluation of feasibility of mapping seismically active faults in Alaska |
title_sort |
evaluation of feasibility of mapping seismically active faults in alaska |
publishDate |
1973 |
url |
http://hdl.handle.net/2060/19730011640 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Fairbanks Yukon |
geographic_facet |
Fairbanks Yukon |
genre |
Alaska Yukon |
genre_facet |
Alaska Yukon |
op_source |
CASI |
op_relation |
Document ID: 19730011640 Accession ID: 73N20367 http://hdl.handle.net/2060/19730011640 |
op_rights |
No Copyright |
_version_ |
1766241952530956288 |