Application of radiometric analysis in the study of provenance and transport processes of Brazilian coastal sediments

被引：62
作者：
Carvalho, C. [1 ]
Anjos, R. M. [1 ]
Veiga, R. [1 ]
Macario, K. [1 ]
机构：
[1] Univ Fed Fluminense, Lab Radioecol LARA, Inst Fis, BR-24210346 Niteroi, RJ, Brazil
来源：
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2011年 / 102卷 / 02期
关键词：
Quaternary deposits; gamma-ray spectrometry; Heavy minerals; Sediment transport; Natural radiation; GAMMA-RAY SPECTROMETRY; SEA-LEVEL CURVES; NATURAL RADIOACTIVITY; QUATERNARY DEPOSITS; CANANEIA REGIONS; HEAVY MINERALS; GRANITIC ROCKS; BEACH SANDS; PARANAGUA; EMPHASIS;
D O I：
10.1016/j.jenvrad.2010.11.011
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Natural gamma radiation of beach sand deposits was measured along the south coast of Rio de Janeiro State, Brazil, with the aim of studying the provenance and transport processes of sediments in this area. Concentrations of thorium, uranium and potassium were evaluated using gamma-ray spectrometry and a behavioral study of eTh/eU and eTh/K cross plots was performed, reflecting the mineralogical properties of beach sands, as well as their history of transport and sorting processes. The results show that such technique can be efficiently used to map heavy mineral distributions and to distinguish the different origins of coastal sediments disclosing the influence of nearby rivers. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：185 / 192
页数：8
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