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   
 
  
MINING RECONNAISSANCE REPORT
MINING RECONNAISSANCE REPORT Ną8 BASIC DATA
 [Page 1 to 37] 12 3 4 5 6 7 8 9  Next 
  Page 1
 
بعديآخرين
   A - GEOCHEMISTRY
   APPENDIX A-1
   APPLICATION OF MULTI-ELEMENT GEOCHEMISTRY TO
   THE GENERAL PROSPECTION OF IRAN
   TECHNIQUES USED
  
   1.Type of sampling
   The strategic geochemical prospecting has been based on the stream sediment sampling method. The efficiency of this method has been tested and proved
   in many different countries and climates and at present it appears to be the most suitable technique for regional reconnaissance.
   The fine alluvium samples, collected wherever possible from the secondary drainage network, provides a good picture of the geochemical characteristics of the drained catchment area.
   Using this stream sampling method, rather than soil sampling, it is possible to employ a looser sampling grid than would otherwise be feasible,
   Preliminary experiments were carried out to determine the sampling grid in two regions known to contain mineralisations (W. SAKOWITSCH, 1976). On the basis of their results a density of 1 sample per 2 sq. km was found to be sufficient and satisfactory for the general reconnaissance programme envisaged in the contract.
  
   2.Sampling method and preparation
   The samples were collected from the actual stream bed, after preliminary positioning of the sampling points on aerial photo's, taking into account the various mapped geological formations. For this reason, the geochemical campaign had to follow the cartographic work in the time schedule.
   The samples were taken from the gravels, commonly under the relatively thin cover of recent mud. Each sample weighed approximately 300 grams.
   The samples were first dried in the sun, or in a few cases by a small fire protected by a bed of gravel in order to avoid any roasting. They were then broken up by hand, but not crushed, and sieved to a mesh of 0.125 millimetres. The fine particles were then quartered, using a Jones divider, thus constituting the sample to be submitted to analysis. The latter were then hermetically sealed into plastic bags to be sent to the laboratory, a duplicate sample being stored by Geometal in Tehran.
   Each batch of samples was accompanied by a form giving for each sample ;
   - its number (sequential order),
   - the nature of the host rock (using a numerical code),
   - the number of the topographical sheet at 1/50 000,
   - its geographical coordinates, using the U.T.M. system.
   The sample number is assigned from .a sequential, four-figure, sequential numbering system. These numbers are used to identify the samples in the later data processing. This system has been applied to the whole zone being studied by Geometal-B.R.G.M.. The same numbers are marked on the sample location maps at 1/50 000, forming part of each report, and on air photographs.
  
   3.Analyses
   3.1.Reasons for the choice of multi-element analysis
   Systematic multi-element analysis is implicitly involved in .any regional geochemical prospection campaign. This technique, which increases the range of analytical data for each sampling point, offers many different advantages
 
 
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