|Table of Contents|

New method to determine geochemical anomalies lower limit based on GIS(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2004年第03期
Page:
28-31
Research Field:
Publishing date:

Info

Title:
New method to determine geochemical anomalies lower limit based on GIS
Author(s):
PENG Sheng-lin1; YANG Zhong-bao1; 2; LI Chao-yan2; LAI Jian-qing1
1 .College of Geoscience &Environment Engineering , Central South University , Changsha , 410083, China ;2 .Geography department , Yuxi teacher' s College , Yuxi , 653100 , China
Keywords:
geographic information system; geochemistry ; anomalies recognize ; original data
PACS:
P632
DOI:
-
Abstract:
This paper discusses the relation between geochemical element content and distributed area and its application to determine the lower limit of element geochemical anomalies by means of geographical information systemGIS)spatial analysis.With the Fenghuangshan copper field as an example , the results show that the lower limit of element geochemical anomalies is 1 000 ×10-6 using the fractal method and original data, 240 ×10-6 using the substitution of awerage for extreme high grade , and 250 ×10 -6 using new method and original data . The results indicate that the new method can recognize abnormity from the original data and it is unnecessary for variables to conform to normal or log-normal distribution.The new method is a simple method to determine the lower limit of element geochemical anomalies.

References:

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Last Update: 2004-09-20