Chemical overprint on the natural remanent magnetization of a subtropical red soil sequence in the Bose Basin, southern China
Article first published online: 21 NOV 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 22, November 2007
How to Cite
2007), Chemical overprint on the natural remanent magnetization of a subtropical red soil sequence in the Bose Basin, southern China, Geophys. Res. Lett., 34, L22308, doi:10.1029/2007GL031400., , , and (
- Issue published online: 21 NOV 2007
- Article first published online: 21 NOV 2007
- Manuscript Accepted: 22 OCT 2007
- Manuscript Revised: 15 OCT 2007
- Manuscript Received: 23 JUL 2007
- red soil sequence;
- chemical remanent magnetization;
 We present a high-resolution paleomagnetic investigation of the subtropical red soil sequence at the Damei section, Bose Basin, southern China. Maghemite with low coercivities and fine-grained hematite with high coercivities but relatively low unblocking temperatures were identified as main carriers of the natural remanent magnetization (NRM). Strong chemical weathering occurring under subtropical climatic conditions in southern China led to a chemical remanent magnetization (CRM) overprint that is sufficiently strong to mask the primary NRM. Analysis of the Bose Basin soil sequence indicates that the CRM has a large lock-in depth (>4 m). This example shows that magnetostratigraphic studies on red soil sequences in subtropical-tropical southern China should be interpreted with caution.