Rock magnetic study of fluvial Holocene soil from Buenos Aires province (Argentina)

被引：2

作者：

Vasquez, Carlos A.

Nami, Hugo G.

机构：

[1] Univ Buenos Aires, Ciclo Basico Comun, RA-1428 Buenos Aires, DF, Argentina

[2] Univ Buenos Aires, Fac Ciencias Exactas Fis & Nat, Dept Ciencias Geol, Inst Geofis Daniel A Valencio,CONICET, RA-1428 Buenos Aires, DF, Argentina

[3] Natl Museum Nat Hist, Dept Anthropol, Smithsonian Inst, Washington, DC 20560 USA

来源：

EARTH PLANETS AND SPACE | 2006年 / 58卷 / 10期

关键词：

rock magnetism; Magnetite; Titanomagnetite; Holocene; Buenos Aires;

D O I：

10.1186/BF03352634

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The magnetic characteristics of soils are widely used in environmental and paleoclimatic investigations for studying the several factors involved in the soil formation process. We propose here a new analytical tool that takes into account the variations in magnetic properties correlated with grain sizes and concentrations of ferrimagnetic minerals. This analytical tool is based on a mathematical model of well-established magnetic properties in samples of known grain sizes and was used in this study to determine changes in the grain size and concentration of ferrimagnetic minerals along a terminal Pleistocene/Holocene fluvial section located in the northeast of Buenos Aires province. These variations may reflect a humid period prevailing in the area and may be associated with climate changes that occurred in the Chaco-Pampean region during the Middle Holocene.

引用

页码：1381 / 1387

页数：7

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