Types of magnetic carriers in late cenozoic sediments in Sanmenxia basin, northern-central China

Citation
Wl. Li et al., Types of magnetic carriers in late cenozoic sediments in Sanmenxia basin, northern-central China, CH J GEO-CH, 44(4), 2001, pp. 520-527
Citations number
20
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN journal
0898-9591 → ACNP
Volume
44
Issue
4
Year of publication
2001
Pages
520 - 527
Database
ISI
SICI code
0898-9591(200107)44:4<520:TOMCIL>2.0.ZU;2-R
Abstract
Study of rock magnetism is performed on the samples from the late Cenozoic sediments in the Sanmenxia basin, northern-central China. Seventeen represe ntative samples are selected to conduct SIRM, remanence coercivity, suscept ibility, alternating field and/or thermal demagnetization experiments. It i s discovered that there are quite different magnetic carriers among loess-p alaeosol, lacustrine-fluvial gray green deposits and brownish red pluvial-a lluvial sediments. The magnetic carriers of loess-palaeosol is dominanted b y magnetite, with only very a little hematite and maghemite. Gray green lac ustrine-fluvial deposits contain less amount of ferromagnetic minerals main ly including hematite and magnetite, but generaly magnetite is more than he matite, besides some unstable minerals, such as goethite and possibily si-d erite. Pluvial-alluvial sediments also have magnetite and hematite, but mag netite is comparatively more.