ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T.
ABSTRACT. Airborne, narrow swath, C-band synthetic aperture radar (SAR) imagery, obtained from the Yellowknife-Hearne Lake area, essentially reflects the geomorphology or landforms of the region. These in turn can be readily related to specific lithologies, rock masses, structure and cultural featur...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.557.8309 2023-05-15T14:19:47+02:00 ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. Walter A. Gibbins V. Roy Slaney The Pennsylvania State University CiteSeerX Archives 1990 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.8309 http://pubs.aina.ucalgary.ca/arctic/Arctic44-S-81.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.8309 http://pubs.aina.ucalgary.ca/arctic/Arctic44-S-81.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic44-S-81.pdf text 1990 ftciteseerx 2016-01-08T11:51:55Z ABSTRACT. Airborne, narrow swath, C-band synthetic aperture radar (SAR) imagery, obtained from the Yellowknife-Hearne Lake area, essentially reflects the geomorphology or landforms of the region. These in turn can be readily related to specific lithologies, rock masses, structure and cultural features. Terrain analysis using textural and tonal (brightness) characteristics of the radar images along with drainage and lakeshore characteristics permitted definition of several lithologic classes: Granite terrain type-1, generally the brightest (lightest) area, has a “coarse ” mottled signature, reflecting the hummocky surface characteristic of granites in this area. Metasedimentary terrain is typified by an intermediate tone, a thinly laminated texture reflecting bedding and angular shorelines of some lakes. Metavolcanic terrain is subordinate in area and lacks well-defined textural or tonal characteristics. It is most easily recognized as parallel ridges with little or no curvature. The city of Yellowknife is readily identifiable by its bright signature and rectangular pattern or texture. Lineaments, recognized by the alignment of rivers and shorelines, are greatly enhanced by bright radar reflections from northerly facing cliffs and radar shadow (zero signal return) of southerly facing cliffs. Several major structural lineaments in the area, known from aeromagnetic and geological maps (diabase dykes, faulted contacts, etc.) are readily apparent in the SAR imagery, as are numerous extensions and subsidiary lineaments. Circumstantial evidence suggests that post-Precambrian and neotectonic activity may be related to lineaments. Key words: synthetic aperture radar (SAR), Yellowknife-Hearne Lake area, terrain analysis, lineaments, neotectonics Text Arctic Arctic Yellowknife Unknown Arctic Hearne Lake ENVELOPE(-113.168,-113.168,62.317,62.317) Yellowknife |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
ABSTRACT. Airborne, narrow swath, C-band synthetic aperture radar (SAR) imagery, obtained from the Yellowknife-Hearne Lake area, essentially reflects the geomorphology or landforms of the region. These in turn can be readily related to specific lithologies, rock masses, structure and cultural features. Terrain analysis using textural and tonal (brightness) characteristics of the radar images along with drainage and lakeshore characteristics permitted definition of several lithologic classes: Granite terrain type-1, generally the brightest (lightest) area, has a “coarse ” mottled signature, reflecting the hummocky surface characteristic of granites in this area. Metasedimentary terrain is typified by an intermediate tone, a thinly laminated texture reflecting bedding and angular shorelines of some lakes. Metavolcanic terrain is subordinate in area and lacks well-defined textural or tonal characteristics. It is most easily recognized as parallel ridges with little or no curvature. The city of Yellowknife is readily identifiable by its bright signature and rectangular pattern or texture. Lineaments, recognized by the alignment of rivers and shorelines, are greatly enhanced by bright radar reflections from northerly facing cliffs and radar shadow (zero signal return) of southerly facing cliffs. Several major structural lineaments in the area, known from aeromagnetic and geological maps (diabase dykes, faulted contacts, etc.) are readily apparent in the SAR imagery, as are numerous extensions and subsidiary lineaments. Circumstantial evidence suggests that post-Precambrian and neotectonic activity may be related to lineaments. Key words: synthetic aperture radar (SAR), Yellowknife-Hearne Lake area, terrain analysis, lineaments, neotectonics |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Walter A. Gibbins V. Roy Slaney |
spellingShingle |
Walter A. Gibbins V. Roy Slaney ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. |
author_facet |
Walter A. Gibbins V. Roy Slaney |
author_sort |
Walter A. Gibbins |
title |
ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. |
title_short |
ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. |
title_full |
ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. |
title_fullStr |
ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. |
title_full_unstemmed |
ARCTIC Preliminary Geologic Interpretation of SAR Data, Yellowknife-Hearne Lake Area, N.W.T. |
title_sort |
arctic preliminary geologic interpretation of sar data, yellowknife-hearne lake area, n.w.t. |
publishDate |
1990 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.8309 http://pubs.aina.ucalgary.ca/arctic/Arctic44-S-81.pdf |
long_lat |
ENVELOPE(-113.168,-113.168,62.317,62.317) |
geographic |
Arctic Hearne Lake Yellowknife |
geographic_facet |
Arctic Hearne Lake Yellowknife |
genre |
Arctic Arctic Yellowknife |
genre_facet |
Arctic Arctic Yellowknife |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic44-S-81.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.8309 http://pubs.aina.ucalgary.ca/arctic/Arctic44-S-81.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291516902342656 |