用<sup>36</sup>Cl研究灰岩侵蚀速率的理论与方法

万军伟; 刘存富; 王增银; 晁念英; 王佩仪

Volume 27 Issue 2

Mar. 2002

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Article Navigation > Earth Science > 2002 > 27(2): 173-176

WAN Jun-wei, LIU Cun-fu, WANG Zeng-yin, CHAO Nian-ying, WANG Pei-yi, 2002. Theory and Method of Determining Erosion Rate in Limestone With 36Cl. Earth Science, 27(2): 173-176.

Citation:

WAN Jun-wei, LIU Cun-fu, WANG Zeng-yin, CHAO Nian-ying, WANG Pei-yi, 2002. Theory and Method of Determining Erosion Rate in Limestone With ³⁶Cl. Earth Science, 27(2): 173-176.

WAN Jun-wei, LIU Cun-fu, WANG Zeng-yin, CHAO Nian-ying, WANG Pei-yi, 2002. Theory and Method of Determining Erosion Rate in Limestone With 36Cl. Earth Science, 27(2): 173-176.

Citation:

WAN Jun-wei, LIU Cun-fu, WANG Zeng-yin, CHAO Nian-ying, WANG Pei-yi, 2002. Theory and Method of Determining Erosion Rate in Limestone With ³⁶Cl. Earth Science, 27(2): 173-176.

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Theory and Method of Determining Erosion Rate in Limestone With ³⁶Cl

Engineering Faculty, China University of Geosciences, Wuhan 430074, China

Received Date: 2001-11-15
Publish Date: 2002-03-25

Abstract

Abstract

Five origins of ³⁶Cl in calcite were studied theoretically: (1)near-surface production by Ca spallation and spallogenic neutron capture, (2)negative muon capture by calcium, (3)neutron emission following negative muon capture, (4)neutrons from photodisintegration reactions initiated by fast muons, (5) neutron from uranium fission and(α, n)reactions. Four characteristics of ³⁶Cl distribution for deep profile in limestone have been discussed: (1)³⁶Cl concentration is reduced with depth, (2)depth naturally separates ³⁶Cl contributions from the various production reactions, (3)in order to partition measured ³⁶Cl concentrations into contributions from muon capture on Ca and capture of muon-produced neutrons on ³⁵Cl, the sample set must possess a range of Ca/Cl ratios, (4)limestone erosion is inevitable under even the most arid conditions and plays a significant role in determining steady-state concentrations.Sampling method of ³⁶Cl and AMS analytical technique are described in detail.Mathematical model of determining erosion rate in limestone is studied and some surface erosion rate of limestone are evaluated.
- surface erosion rate of limestone,
- ³⁶Cl,
- accelerator mass spectrometry

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References(11)

References

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