Skip to Main Content
Skip Nav Destination
GEOREF RECORD

A normalization solution to mass transfer illustration of multiple progressively altered samples using the isocon diagram

Guo Shun, Ye Kai, Chen Yi and Liu Jingbo
A normalization solution to mass transfer illustration of multiple progressively altered samples using the isocon diagram
Economic Geology and the Bulletin of the Society of Economic Geologists (September 2009) 104 (6): 881-886

Abstract

This study complements the isocon method of Grant (1986) for describing mass transfer during metasomatic alteration by introducing a normalization solution to illustrate sequential mass transfers among multiple progressively altered geologic samples. The principle of the normalization solution involves adjusting all the isocons (defined by unaltered and altered sample pairs) to a single unified isocon without modifying the relative concentration changes of the corresponding components. When the normalization solution is applied to a sequence of progressively altered samples, an immobile component is defined or assumed, and the measured concentrations of all components in all altered samples are normalized by multiplying the corresponding normalizing factors; these factors are calculated using the concentration data for the immobile component. The normalized compositions of the altered samples are then plotted against the original measured composition of the unaltered sample in a single normalized isocon diagram that illustrates all the mass changes for a series of progressively altered samples. This study applies the above approach to a set of progressively altered hydrothermal quartz-feldspar-porphyries at the Millenbach Cu-Zn mine (Riverin and Hodgson, 1980). The graphically displayed result indicates that the normalized isocon diagram can illustrate not only the mass changes of any component between any two altered zones, but also mass transfer trends of all components in the entire alteration zone. The normalization solution can be applied to any group of progressively altered geologic samples.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 104
Serial Issue: 6
Title: A normalization solution to mass transfer illustration of multiple progressively altered samples using the isocon diagram
Affiliation: Chinese Academy of Sciences, Institute of Geology and Geophysics, State Key Laboratory of Lithospheric Evolution, Beijing, China
Pages: 881-886
Published: 200909
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 13
Accession Number: 2010-009046
Categories: Economic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N48°16'00" - N48°16'00", W79°02'60" - W79°02'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201006
Close Modal

or Create an Account

Close Modal
Close Modal