CRUSTAL NEON - A STRIKING UNIFORMITY

被引：162

作者：

KENNEDY, BM

HIYAGON, H

REYNOLDS, JH

机构：

[1] Department of Physics, University of California, Berkeley

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 1990年 / 98卷 / 3-4期

关键词：

D O I：

10.1016/0012-821X(90)90030-2

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：

By combining data from a diverse suite of crustal fluid samples representing a broad geographical distribution, we have identified a well-defined nucleogenic (crustal) neon component. The neon is produced from (α, n) and (n, α) nuclear interactions involving nuclei of O, Mg, and F [1]. In the limiting case of 20Ne 22Ne = 0, the composition is: 21Ne 22Ne = 0.47 ± 0.01 and 21Ne 4He = (0.46 ± 0.08) × 10-7. A crustal O F ratio of ∼ 110 (atomic) calculated from the 21Ne 22Ne ratio is 4-10 times less than the average crustal O F ratio. The discrepancy can be accounted for by an enhanced O F ratio within the ∼ 10-40 μm range of the UTh-generated α-particles. © 1990.

引用

页码：277 / 286

页数：10

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