Radiogenic heavy minerals in Brazilian beach sand

被引：9
|
作者：
Malanca, A [1 ]
de Pieri, R
Gazzola, A
机构：
[1] Univ Parma, Dept Phys, I-43100 Parma, Italy
[2] Univ Parma, Dept Earth Sci, I-43100 Parma, Italy
[3] CRR, ARPA, I-29100 Piacenza, Italy
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 1998年 / 230卷 / 1-2期
关键词：
D O I：
10.1007/BF02387474
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Sand samples collected on the beaches of the "radioactive" Brazilian town of Guarapari were first separated by flotation in bromoform and successively divided into various magnetic fractions with a Franz isodynamic separator. Concentrations of background radionuclides in samples of monazite, ilmenite, and zircon were determined by a gamma-ray spectrometer. Chemical composition of monazite, ilmenite, and magnetite were assessed by means of an electron microprobe. Monazite resulted to be relatively rich in ThO2 whose abundance ranged from 5.3 to 7.7 (wt%).
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页码：257 / 260
页数：4
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