Paper Information

Title: 

REJECTING EFFECTS OF VEGETATION CANOPY IN DETECTING ALTERATION HALOS USING TM IMAGE IN VARZAGAN AREA (E-AZARBAIJAN)

Type: SPEECH
Author(s): AHMADI A.*,MOHAMMADZADEH M.J.,FALAHAT R.
 
 *MINING ENGINEERING DEPT., SAHAND UNIVERSITY OF TECHNOLOGY
 
Name of Seminar: PROCEEDING OF IRANIAN MINING ENGINEERING CONFERENCE
Type of Seminar:  CONFERENCE
Sponsor:  IRANIAN SOCIETY OF MINING ENGINEERING
Date:  2005Volume 1
 
 
Abstract: 

Magmatic activities in Varzagan area have exposed in the form of volcanic and sub-volcanic intrusive rocks along with alteration zones, with a lenticular band of 30.km width trending W-E at the central part of region. Most of hydrothermal alteration processes in the area have produced OH-bearing minerals and supergene processes have created oxides and Fe-oxides in which these alteration halos can be easily detected by remote sensing techniques. Application of Crosta method, band ratios and software defoliation technique were successfully attempted, which resulted in detecting alteration zones of the Varzagan area. Using these methods, the false anomalies and noise were detected during initial assessment of the prospect in the NW of area where dense vegetation coverage were present. This is one of the basic intricate in interpretation of TM data. In this work a method have been provided to remove the effects of vegetation canopy in detecting alteration halos.

 
Keyword(s): REJECTING VEGETATION EFFECTS, REMOTE SENSING, CROSTA METHOD, VARZAGAN-AZARBAIJAN.
 
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