Skip to Main Content
GEOREF RECORD

Improved detection of anomalous catchment basins by incorporating drainage density in dilution correction of geochemical residuals

Shahed Shahrestani and Ahmad Reza Mokhtari
Improved detection of anomalous catchment basins by incorporating drainage density in dilution correction of geochemical residuals
Geochemistry - Exploration, Environment, Analysis (May 2017) 17 (3): 194-203

Abstract

In exploration for mineral deposits using stream sediment samples, a phenomenon known as dilution of metal content originating from mineralized sources should be taken into account. Dilution occurs when stream sediments originating from upstream mineralized and non-mineralized areas are mixed during transport and deposition. In the sample catchment basin approach, dilution correction is accomplished by employing Hawkes's equation (1976). Catchment area size is the correction factor used in the Hawkes's equation to correct geochemical residuals for dilution. However, the upstream area of each stream sediment sample is representative of the hydrological response and dilution capability of a drainage basin. In the present research, the Hawkes's equation was modified by incorporating drainage density of catchment basin to correct geochemical residuals for dilution. The existing and new equations were applied to stream sediment data from Iran. The results were compared using known occurrences of Au mineralization as validation points. This showed the superiority of the new technique using drainage density as a factor for correcting geochemical residuals against dilution.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: 17
Serial Issue: 3
Title: Improved detection of anomalous catchment basins by incorporating drainage density in dilution correction of geochemical residuals
Affiliation: Isfahan University of Technology, Department of Mining Engineering, Isfahan, Iran
Pages: 194-203
Published: 20170509
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
Number of pages: unpaginated
References: 73
Accession Number: 2017-051990
Categories: General geochemistryEconomic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch map
N36°00'00" - N36°15'00", E46°00'00" - E46°15'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201728
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal