Publication Date:
2017-04-04
Description:
We report mineral magnetic results from a 7.5 m loess sequence (150 samples) from the
southernmost extremity of the Chinese loess plateau (which includes the last two glacial cycles). In this area the loess sediments experienced particularly intense weathering
processes. The magnetic assemblage is dominated by a mixture of pseudo-single domain (PSD) and multidomain (MD) magnetite
with associated superparamagnetic (SP) grains of either magnetite or maghemite in the paleosols and weathered loess horizons. All the rock magnetic parameters fluctuate in parallel with marine sediment δ18O data over the last 150Kyr, thus reflecting changing global paleoclimatic conditions. This relationship is also supported by the evidence of Milankovitch cycles in the magnetic susceptibility record. Paleorainfall estimates, when compared with other studies from the Chinese loess plateau, underline the (more) humid character of this region during
the last ~130 kyr.
Description:
Published
Description:
645-659
Description:
JCR Journal
Description:
reserved
Keywords:
magnetic mineralogy
;
climatic cycles
;
Loess
;
China
;
01. Atmosphere::01.01. Atmosphere::01.01.02. Climate
;
04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
;
04. Solid Earth::04.05. Geomagnetism::04.05.07. Rock magnetism
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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