جدايش آنومالي هاي ژيوشيميايي از زمينه بااستفاده از روش طيف توان -مساحت مطالعه موردي : كانسار پورفيري مس- موليبدن كهنگ ، اصفهان

Separation of geochemical anomalies from background by using of power spectral-area fractal method, case study: Kahang porphyry Cu- Mo deposit, Isfahan

Separation of different anomalies from background has most importance in geochemical studies. Fractal methods are proper methods in this operation because spatial distributions of data and anomalies geometrical features are accorded in these methods. One of the modern fractal methods is power spectral-area (P-A) method. In this method, data from concentration-place field are displaced to frequency-time field by 2D Fourier transportation and different frequency populations from geochemical data (geochemical signal) are separated. First, power spectrums are calculated for geochemical signals and digital filters are designed by fractal analysis. Finally, anomalies were separated from background by using these filters. In this paper, litho geochemical data from Kahang porphyry Cu-Mo deposit in Isfahan were used and high intensive Cu, Mo and Au anomalies were determined. For this operation and power spectral distribution map drawn for these elements, MATLAB software is used. Comparison between the results from this method by Litho logical units, alterations and tectonic information shows that P-A method has high ability in separation of different anomalies in geochemical exploration.