Statistical analysis of lineament patterns and their palinspastic restoration: Coeur d'Alene mining district, Idaho
2644 lineaments obtained from multistage lineament mapping on color infrared and conventional black and white aerial photos and Landsat images were digitized and length-weighted frequency distributions calculated at 5 degree intervals on a 10 kilometer square grid. Statistically significant peaks (<95%) and trough (>5%) within each cell were identified. These significant trends were cross correlated with available structural data such as mapped faults, joints and Pb-Zn-Ag bearing ore veins in each cell. The resulting lineament map was then subjected to a palinspastic restoration. Ambiguity in interpreting the paly-modal population was corrected by restoring the lineament within each of the 21 fault-bound structural domains. Restoration of the patterns was accomplished by translating the digitized block margins with their lineaments to the predetermined palinspastic base. On the basis of this reconstruction it has been possible to identify individual grid cells that had strongest correlations with available structural data. These cells clearly showed that spatial filtering of lineament patterns into statistically significant trends brings forth the strong structural controls on mineralization exerted by preexisting ac-joints and faults in the NW-SE trending arcuate Kootenay folds that were right-laterally displaced and deformed by the Lewis and Clark shear zone. Statistically significant correlation between ore-veins and lineaments was only possible on palinspastic restoration and not on the present day lineament map.
- Research Organization:
- Old Dominion Univ., Norfolk, VA (USA)
- OSTI ID:
- 6273234
- Report Number(s):
- CONF-8510489-
- Journal Information:
- Geol. Soc. Am., Abstr. Programs; (United States), Vol. 17; Conference: 98. annual meeting of the Geological Society of America, Orlando, FL, USA, 28 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IDAHO
LEAD ORES
SILVER ORES
ZINC ORES
MINERALIZATION
LINEAMENTS
MAPPING
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
LANDSAT SATELLITES
ORIENTATION
REMOTE SENSING
STATISTICAL MODELS
FEDERAL REGION X
GEOLOGIC STRUCTURES
MATHEMATICAL MODELS
NORTH AMERICA
ORES
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USA
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)
580203 - Geophysics- Geophysical Survey Methods- (1980-1989)