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| Titel |
Identification of uranium targets based on airborne radiometric data analysis by using multifractal modeling, Tark and Avanligh 1:50 000 sheets, NW Iran |
| VerfasserIn |
P. Afzal, A. Zia Zarifi, A. Bijan Yasrebi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 19, no. 2 ; Nr. 19, no. 2 (2012-04-16), S.283-289 |
| Datensatznummer |
250014195
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| Publikation (Nr.) |
 copernicus.org/npg-19-283-2012.pdf |
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| Zusammenfassung |
| Airborne geophysical anomaly separation using conventional statistics and the
fractal/multifractal concentration-area (C-A) method has been applied to the
Tark and Avanligh 1:50 000 sheets in NW Iran. The geophysical survey that
resulted in the airborne geophysical data was conducted for uranium
exploration in both areas. Selected anomalies were further investigated by
using surface radiometric data. Firstly, threshold values to define anomalies
were determined and compared by means of conventional statistical methods.
Several relatively large anomalies were identified with uranium (U) equal to 1.7 eppm
and 1.9 eppm in the Tark and Avanligh areas, respectively; locally these U
anomalies have magnitudes exceeding 3.5 eppm in both areas. Log-log plots
obtained for the C-A method indicate existence of two separate stages of U
enrichment, with a major event being the cause of U concentration values above
6.1 and 3.4 eppm in the Tark and Avanligh areas, respectively. These higher
intensity anomalies are located in the northwestern part of the Tark and in
the southern part of the Avanligh sheets. In both areas, the C-A anomalies
were further investigated using ground radiometric data and XRF analysis
revealing higher than 150 and 280 ppm U concentration values in the two
areas, respectively. Correlation between the anomalies and geological units
show that the anomalies are associated with limestone and sandstone units. |
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