Origin of the magnetic susceptibility signal in Chinese loess
作者： Xingmin Meng , Edward Derbyshire , Rob A Kemp , None
DOI: 10.1016/S0277-3791(97)00053-X
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摘要: Abstract The quality of the loess magnetic susceptibility (MS) record as a climate proxy has been compared to ice core and deep-sea records, yet source causes MS signal remain poorly understood. Four explanations are currently in circulation. dominant hypothesis, that variations largely result from post-depositional weathering and/or formation phases by pedogenic processes, led use data palaeoprecipitation proxy. We present different view based on analyses samples monthly dust falls over 4 years North China. These have values comparable those Pleistocene palaeosols but, unlike latter, their seasonal so cannot be explained differences. Our experiments confirm enhancement is caused principally fine-grain minerals, contrast with previous proposals, major ultrafine minerals appears decomposed plant litter.
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