فارسي | English
  About Us | About Iran | Contact Us | Staff Info[Geoportal Info] [Maps] [Mining Info] [Other Activities]  
 
  News | Events | Photo Gallery | Downloads | Links | Kids  Search    Region    Scale    Subject   :Access to information by   Home | Newest   
 
  
Explorations in Dehsalm
Report on the Systematic Geochemical Explorations in Dehsalm Sheet (1:100.000)
 [Page 1 to 3] 12 3  Next 
  Page 1
 
بعديآخرين
   Aqazadeh, Ebrahimi, Islami Asharfpour, Abolma'ali, Afzali, Ahmadi, Omidvar
   February2001
  
   This sheet is located in Khorasan province at longitudes 59? to 59?30'E and latitudes 31? to 31?30' N.
   In this region the igneous, metamorphic and sedimentary lithology units related to Precambrian to Neogene have outcropped. The oldest unit is Precambrian (chert-bearing crystalline limestone, mica schist and para amphibole schist) that outcrops as a narrow zone in the northeast of the sheet.
   In this sheet, 635 geochemical samples were taken and analyzed for 21 elements of Co, Sc, Cd, Y, V, Cr, Ni, Mn, Sr, Ba, Au, As, Sb, Bi, Hg, Cu, Pb, Mo, Sn, Ag, Zn. In the statistical calculations, firstly statistical parameters related to raw data were calculated, after that lithology homogenized communities were separated and each one was normalized in proportion to the mean values of the same community for obtaining the values of elements' enrichment index for every sample and then enrichment index data was normalized. By means of monovariable and multivariable statistical techniques like elements' correlation coefficient, cluster analysis and factor analysis, the data was analyzed and monovariable maps were drawn using network estimation technique for enrichment index data.
   Areas introduced in geochemical and heavy mineral methods as anomalous areas were merged and as a result 28 regions were introduced as final anomalous areas. In addition, some information was presented in the form of 36 geochemical maps.
   The anomalous areas have been referred to below:
  
  
   Anomaly 1- located in northeast of Dehsalm sheet with lithologies of phylite, sleet, schist and metamorphosed sand stone along with pegmatitic veins of anomalies W, Mo and Hg.
  
   Anomaly 2- located in southwest of anomaly 1 in garnet- andalusite schists, pyritic siliceous veins and tourmaline pegmatite with anomalies of Sr, Sb, Ag and Zn together with minerals of magnetite, hematite, ilmenite, chromite, garnet, pyroxene, etc.
  
   Anomaly 3- located in north of Dehsalm sheet (1:50000) in schist and sandstone with quartzic veins and anomalies of Sn, Bi and Au.
  
  
   Anomaly 4- located in northwest of Dehsalm sheet (1:50000) in schist and sandstone with quartzic veins and anomalies of Mo, Sb, Ag, Bi and W. Minerals of magnetite, ilmenite, hematite, chromite, garnet and, etc. have been observed in this area.
  
   Anomaly 5- located in south of anomaly 3 in Shomal-e Dehsalm sheet (1:50000) in sandstone, andalusite schist and quartzic veins with the anomalous elements of Ag and W and heavy minerals like magnetite, hematite, chromite, garnet, pyroxene, etc.
   Anomaly 6- located in east of Shomal-e Dehsalm sheet (1:50000) in tourmaline pegmatite, metamorphic sandstone, garnet schist, sleet, phylite and granite with anomalous elements of Pb, Ba, Sb, Ag, As and Y and heavy minerals like magnetite, hematite, ilmenite, chromite, garnet, etc.
  
 
 
Publications  Library
Glossary  Papers
 
 
 
 
FAQ  Members
Job Offer  Training
 
 
 
 
• NanoBioEarth Database 
• Medical Geology Database 
• Geological Atlas of Roads 
• 4th National Development Plan 
• Marine Geology 
• Geography information 
• Mines and Deposits of Iran 
• Landslide Database of Iran 
• Exploration Area DB 
• Copper Database 
• Gold Database  
• Geoscience Laboratories 
• Mineral Information 
• Bibliographic Database 
• Geochemistry Database 
• Earthquake database 
• Abandoned mines DB of Iran 
• Mineral processing database 
• Minerals database 
 
 
 
 
Login Name:
Password:
Sign Up for membership ]
 
 
 
   Others Activities:• Geo Hazard Of South Caspian • Geoscience database of ALBA • Geoscience Database of ECO 
• GEOLOGICAL SURVEY OF IRAN • Tajikistan Geoscience Database • Geo Database of Venezuela • 4th National Development Plan 
• Export & Import Regulation Act     
 
 
Maps:• Map of Iran's Last Earthquake • Distribution Map of mineral Processing Plants 
• Mineral Distribution Map of Iran • Geosciences laboratories distribution map of Iran • Orohydrographic Map of Iran 
• Select state on iran map • Geological Map of Iran(1:1000, 000 Scale) • 2500 K Magnetic Lineament Map of Iran 
• Map of Iran's Earthquake    
 
Best viewed:1024*768
National Geoscience Database Of IRAN
URL:www.ngdir.ir
Contact Mail:Info@ngdir.ir
 
 
 Search with:           
Designed by Payvand Software Group  Privacy | Copyright | Disclaimer