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The incorporation of thermal methods in mineral magnetism of loess-paleosol sequences: a brief overview 被引量:24

The incorporation of thermal methods in mineral magnetism of loess-paleosol sequences: a brief overview
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摘要 The advantages of thermal methods for mineral-magnetic research of loess/paleosolsequences are illustrated in an introductory overview. When applying thermal methods, magnetiteand maghemite can be distinguished, something which is difficult with field-dependentmeasurements at room temperature. Also, variable low-temperature oxidation that is related toclimate may be quantified. Thirdly, grain-size estimates pertaining to the whole superparamagneticrange can be inferred from LT warming experiments and to a lesser extent from variable chemicalalteration during heating. Application of mineral-magnetic techniques may lead to thedevelopment of quantifiable proxy parameters for paleoclimate. The advantages of thermal methods for mineral-magnetic research of loess/paleosol sequences are illustrated in an introductory overview. When applying thermal methods, magnetite and maghemite can be distinguished, something which is difficult with field-dependent measurements at room temperature. Also, variable low-temperature oxidation that is related to climate may be quantified. Thirdly, grain-size estimates pertaining to the whole superparamagnetic range can be inferred from LT warming experiments and to a lesser extent from variable chemical alteration during heating. Application of mineral-magnetic techniques may lead to the development of quantifiable proxy parameters for paleoclimate.
出处 《Chinese Science Bulletin》 SCIE EI CAS 1999年第S1期53-63,共11页
关键词 Magnetic MINERALS LOESS PALEOSOL pedogenic processes CURIE temperature Magnetic minerals loess paleosol pedogenic processes Curie temperature
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