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Identification of greigite in lake sediments and its magnetic significance |
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| Authors: | HU Shouyun E Appel VHoffmann W Schmahl |
| Institution: | 1. Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China 2. Institut für Geologie und Palaontologie, Universitat Tübingen, 72076 Tübingen, Germany 3. Institut für Mineralogie, Ruhr-Universtitat Bochum, 44780 Bochum, Germany |
| Abstract: | Detailed rock magnetic investigations and mineralogical analysis were conducted on lacustrine sediments recovered from Zoigê Basin, eastern Tibetan Plateau. Greigite, with fine and homogenous grain size, is found as a main magnetic carrier, which is suspected to be of biochemical origin. In contrast to some reports, greigite within the sediments is not oxidized even after exposure to air for a few years, which could be due to the fact that greigite is sealed by silicate. |
| Keywords: | greigite lacustrine sediments rock magnetism X-ray diffraction SEM |
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