At the invitation of Prof. Liu Qingsong Dr.Reidar Løvlie from Department of Earth Science,University of Bergen, Norway, visited our institute and present an academic lecture entitled"Magnetization processes in Chinese loess; experimental evidence" on May 11,2009. 

　 Here is the summary of the lecture:

　 The succession of loess/paleosol units at the Chinese loess plateau (CLP) probably represents the longest and most continuous continental paleoclimate record for the last ca 22 Ma. The time-frame are mainly based on paleomagnetic polarity stratigraphy, and although there is an apparent good first-order agreement between polarity-records of these relatively high-deposition rate sediments (4-16 m/ky), a number of discrepancies remain to be accounted for:

a) -  reliable records of paleosecular variation are surprisingly few
b) -  geomagnetic excursions are generally absent
c) -  location of the MBB is not in climatic accordance with marine records

　  These discrepancies may not be convincingly resolved without a better understanding of the mechanisms and processes that act and control the acquisition of the stable remanent magnetization encountered in loess and paleosol on CLP. There are presently no published reports of any such studies.

　  We have performed several laboratory experiments to uncover and elucidate factors that may control the acquisition of remanent magnetization in loess. In our experiments we have deposited disintegrated natural L1-loess from the southern margin of the CLP in controlled fields.

　  This lecture will present experimental setup and the results we have obtained at the present.