Rock magnetic properties of Nihewan sediments at Xujiayao |
| |
Authors: | Xisheng Wang Reidar L?vlie and Pu Su |
| |
Institution: | 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China 2. Institute of Solid Earth Physics, Allegt 41 Bergen, Norway 3. Taiyuan University of Technology, Taiyuan 030024, China |
| |
Abstract: | Rock magnetic measurements of Nihewan sediments from Xujiayao section demonstrate that magnetite, hematite and maghemite are
dominant remanent magnetization carriers. Monitoring the variations of magnetic susceptibility (MS) and saturating isothermal
remanent magnetization (SIRM) at low temperature are the attractive ways of detecting the presence of magnetite, maghemitization
and superparamagnetic grain sizes. Low-temperature MS investigations suggest that susceptibility enhancement for Xujiayao
samples is mainly due to the remarkable presence of SD/MD magnetite to some degree though some magnetite grains have been
partially oxidized at some depths. It is tentatively concluded that both SD/MD magnetite and hematite are of detrital origin
and carry a characteristic remanent magnetization (ChRM), whereas maghemite can be attributed to be chemical origin, overprinting
a reversed polarity component of Matuyama age. |
| |
Keywords: | Nihewan SIRM hysteresis loops depositional remanent magnetization Curie point |
本文献已被 万方数据 SpringerLink 等数据库收录! |
|