|Table of Contents|

Application of LOWESS fit to strontium isotope stratigraphy(PDF)

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

Issue:
2004年第02期
Page:
1-5
Research Field:
Publishing date:

Info

Title:
Application of LOWESS fit to strontium isotope stratigraphy
Author(s):
ZHANG Meng 1; HUANG Si-jing 1; XIE Guo-gang 2; WANG Qi-xiang 2; HOU Jie 2
1.State Key Laboratory ofOil/ Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu 610059, China;2.School ofEarth Sciences, Chengdu University of Technology,Chengdu 610059, China
Keywords:
strontium iso tope stratigraphy ; dating marine sediments; global correlation; LOWESS fit
PACS:
P597
DOI:
-
Abstract:
As an essential tool,the Strontium Isotope Stratigraphy(SIS)can be used to date and correlate marine sediments.Many geological events can be explained with the Global Standard Strontium Curve(GSSC),which representing the evolution of marine w(87Sr)/ w(86Sr)through numerical times.The GSSC has highly important theoretical direction and rea工l application in dating and correlating marine sediments.Therefore,the isotopic stratigraphers are trying to find out the optimum manner to shorten the section dimension of the best fitting curve.According to the position of w(87Sr)/ w(86Sr)on GSSC,we will assign the unknown estimation to numerical age.Compared with the measured value of w(87Sr)/ w(86Sr),we can also gather all influence factors. LOWESS fit on statistics provides a shrewd manner to research and figure the optimum fitting mode of GSSC.When assigning nu- merical ages to sediments or estimating the duration of a biozone or a hiatus in sedimentation,the task is made both easier and less prone to error by using the LOWESS fit curve,which allows quick and easy conversion from w(87Sr)/ w(86Sr)to numerical age. It is clear that a great deal of improvement needs to be made to most of the Phanerozoic w(87Sr)/ w(86Sr)curve if SIS is to realize its true potential for dating and correlating rocks.

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Last Update: 2004-06-20