Correlation between paleosol-soil magnetic signal and climate
A comparison of the index of potential water storage (PWS) with the magnetic properties of soils in Russia and of Argentina and China paleosols suggests the existence of one or two climatic thresholds that affect the formation, preservation or depletion of ferrimagnetic minerals. Soils characterized...
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todo:paper_13438832_v58_n10_p1373_Orgeira2023-10-03T16:09:50Z Correlation between paleosol-soil magnetic signal and climate Orgeira, M.J. Compagnucci, R.H. Environmental magnetism Late Cenozoic Loess and paleosol sequences Paleoclimate Cenozoic geomagnetism magnetic mineral magnetic property paleoclimate paleomagnetism paleosol Argentina Asia China Eurasia Far East Russian Federation South America A comparison of the index of potential water storage (PWS) with the magnetic properties of soils in Russia and of Argentina and China paleosols suggests the existence of one or two climatic thresholds that affect the formation, preservation or depletion of ferrimagnetic minerals. Soils characterized by a positive PWS are wetted during an important part of the year, creating an appropriate environment that favors the depletion of ferrimagnetic minerals due to mainly reductive dissolution. Such soils are characterized by a depletion of detrital ferrimagnetic minerals, as observed in Argentinean soils and paleosols. On the other hand, a negative PWS prevents highly reducing conditions in the soil, and the detrital ferrimagnetic minerals are preserved. The environmental conditions of these soils allow the formation of (superparamagnetic) pedogenic minerals, together with the preservation of lithogenic minerals. These conditions produce a net magnetic enhancement of the soil, as observed in Russia and China. The second threshold in PWS could be at a positive value. Above this second threshold, the water content of the soil during practically the whole year could allow the formation of (superparamagnetic) pedogenic minerals. This threshold could explain differences in the magnetic enhancement or depletion of Argentina soils characterized by a positive PWS. Copyright © The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB. Fil:Orgeira, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Compagnucci, R.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13438832_v58_n10_p1373_Orgeira |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Environmental magnetism Late Cenozoic Loess and paleosol sequences Paleoclimate Cenozoic geomagnetism magnetic mineral magnetic property paleoclimate paleomagnetism paleosol Argentina Asia China Eurasia Far East Russian Federation South America |
spellingShingle |
Environmental magnetism Late Cenozoic Loess and paleosol sequences Paleoclimate Cenozoic geomagnetism magnetic mineral magnetic property paleoclimate paleomagnetism paleosol Argentina Asia China Eurasia Far East Russian Federation South America Orgeira, M.J. Compagnucci, R.H. Correlation between paleosol-soil magnetic signal and climate |
topic_facet |
Environmental magnetism Late Cenozoic Loess and paleosol sequences Paleoclimate Cenozoic geomagnetism magnetic mineral magnetic property paleoclimate paleomagnetism paleosol Argentina Asia China Eurasia Far East Russian Federation South America |
description |
A comparison of the index of potential water storage (PWS) with the magnetic properties of soils in Russia and of Argentina and China paleosols suggests the existence of one or two climatic thresholds that affect the formation, preservation or depletion of ferrimagnetic minerals. Soils characterized by a positive PWS are wetted during an important part of the year, creating an appropriate environment that favors the depletion of ferrimagnetic minerals due to mainly reductive dissolution. Such soils are characterized by a depletion of detrital ferrimagnetic minerals, as observed in Argentinean soils and paleosols. On the other hand, a negative PWS prevents highly reducing conditions in the soil, and the detrital ferrimagnetic minerals are preserved. The environmental conditions of these soils allow the formation of (superparamagnetic) pedogenic minerals, together with the preservation of lithogenic minerals. These conditions produce a net magnetic enhancement of the soil, as observed in Russia and China. The second threshold in PWS could be at a positive value. Above this second threshold, the water content of the soil during practically the whole year could allow the formation of (superparamagnetic) pedogenic minerals. This threshold could explain differences in the magnetic enhancement or depletion of Argentina soils characterized by a positive PWS. Copyright © The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB. |
format |
JOUR |
author |
Orgeira, M.J. Compagnucci, R.H. |
author_facet |
Orgeira, M.J. Compagnucci, R.H. |
author_sort |
Orgeira, M.J. |
title |
Correlation between paleosol-soil magnetic signal and climate |
title_short |
Correlation between paleosol-soil magnetic signal and climate |
title_full |
Correlation between paleosol-soil magnetic signal and climate |
title_fullStr |
Correlation between paleosol-soil magnetic signal and climate |
title_full_unstemmed |
Correlation between paleosol-soil magnetic signal and climate |
title_sort |
correlation between paleosol-soil magnetic signal and climate |
url |
http://hdl.handle.net/20.500.12110/paper_13438832_v58_n10_p1373_Orgeira |
work_keys_str_mv |
AT orgeiramj correlationbetweenpaleosolsoilmagneticsignalandclimate AT compagnuccirh correlationbetweenpaleosolsoilmagneticsignalandclimate |
_version_ |
1782029029470109696 |