The cosmogenic 21NE production rate in quartz evaluated on a large set of existing 21Ne-10Be data

被引：27
作者：
Kober, F. [1 ]
Alfimov, V. [2 ]
Ivy-Ochs, S. [2 ,3 ]
Kubik, P. W. [2 ]
Wieler, R. [4 ]
机构：
[1] ETH, Inst Geol, CH-8092 Zurich, Switzerland
[2] ETH, Lab Ion Beam Phys, CH-8093 Zurich, Switzerland
[3] Univ Zurich, Inst Geog, CH-8057 Zurich, Switzerland
[4] ETH, Inst Geochem & Petr, CH-8092 Zurich, Switzerland
来源：
EARTH AND PLANETARY SCIENCE LETTERS | 2011年 / 302卷 / 1-2期
关键词：
cosmogenic nuclides; production rate; Ne-21; Be-10; erosion island; SURFACE EXPOSURE AGES; PRODUCTION-RATE CALIBRATION; NORTHERN VICTORIA LAND; IN-SITU; DRY-VALLEYS; SCALING FACTORS; EROSION RATES; SIRIUS GROUP; ICE-SHEET; HALF-LIFE;
D O I：
10.1016/j.epsl.2010.12.008
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Based on a compilation of published combined Be-10 and Ne-21 cosmogenic nuclide data sets from quartz samples obtained at ETH Zurich we assess the Ne-21/Be-10 (P21/P10) production rate ratio with the goal to determine the Ne-21 production rate (P21) in quartz. A variety of sliding "erosion islands" in a Ne-21/Be-10 versus Be-10 diagram were evaluated to find the one that fits the data best, which in turn yields the most probable P21 if the Be-10 production rate is known. The approach minimizes the influence of samples with a complex exposure history. A best-fit value for P21/P10(sp) ((sp) - the Be-10 fraction being produced by spallation, as opposed to production by muons) of 423 +/- 0.17 is obtained for a Be-10 half-life of 1.39 Ma. Adopting a P10(sp), value in quartz of 4.41 +/- 0.52 at g(-1) yr(-1) this yields a P21 of 18.7 +/- 2.3 at g(-1) yr(-1). It is possible that 2% of the Ne-21 is produced by fast muons. (C) 2010 Elsevier B.V. All rights reserved.
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页码：163 / 171
页数：9
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