Radiometric analysis of Quaternary deposits from the southeastern Brazilian coast

被引：35

作者：

Anjos, R. M. ^{[1
]}

Veiga, R. ^{[1
]}

Macario, K. ^{[1
]}

Carvalho, C. ^{[1
]}

Sanches, N. ^{[1
]}

Bastos, J. ^{[1
]}

Gomes, P. R. S. ^{[1
]}

机构：

[1] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil

来源：

MARINE GEOLOGY | 2006年 / 229卷 / 1-2期

关键词：

quaternary deposits; gamma-ray spectrometry; heavy minerals; sediment transport;

D O I：

10.1016/j.margeo.2006.03.001

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Natural gamma radiation measurements of the beach sand deposits were performed with the aim of understanding the provenance and transport processes of sediments along the coastal zone of three Brazilian States: Sao Paulo (SP), Rio de Janeiro (RJ) and Espirito Santo (ES). The method employs thorium, uranium and potassium as tracers of the mineralogical properties of beach sand minerals, which reflect the geological history of transport and sorting processes. A cross plot of eTh/eU and eTh/K shows a considerable positive correlation with the geological evolution of the Quaternary coastal deposits from 35 areas of the southeastern Brazilian coast. Additionally, the distribution of heavy minerals along this coastal zone was mapped. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：29 / 43

页数：15

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