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Titolo:
Mineral magnetic study of the Taklimakan desert sands and its relevance tothe Chinese loess
Autore:
Torii, M; Lee, TQ; Fukuma, K; Mishima, T; Yamazaki, T; Oda, H; Ishikawa, N;
Indirizzi:
Okayama Univ Sci, Dept Biosphere Geosphere Syst Sci, Okayama 7000005, Japan Okayama Univ Sci Okayama Japan 7000005 Syst Sci, Okayama 7000005, Japan Acad Sinica, Inst Earth Sci, Taipei 115, Taiwan Acad Sinica Taipei Taiwan 115 Sinica, Inst Earth Sci, Taipei 115, Taiwan Kumamoto Univ, Dept Environm Sci, Kumamoto 8608555, Japan Kumamoto Univ Kumamoto Japan 8608555 vironm Sci, Kumamoto 8608555, Japan Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501 & Technol, Kobe, Hyogo 6578501, Japan Geol Survey Japan, Dept Marine Geol, Tsukuba, Ibaraki 3058567, Japan Geol Survey Japan Tsukuba Ibaraki Japan 3058567 a, Ibaraki 3058567, Japan Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 & Environm Studies, Kyoto 6068501, Japan
Titolo Testata:
GEOPHYSICAL JOURNAL INTERNATIONAL
fascicolo: 2, volume: 146, anno: 2001,
pagine: 416 - 424
SICI:
0956-540X(200108)146:2<416:MMSOTT>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-TEMPERATURE OXIDATION; DEEP-SEA SEDIMENTS; PALEOSOL SEQUENCES; NATURAL MATERIALS; HYSTERESIS LOOPS; GRAIN-SIZE; SUSCEPTIBILITY; PLATEAU; TITANOMAGNETITES; PLEISTOCENE;
Keywords:
Chinese loess; magnetic granulometry; magnetic mineralogy; Taklimakan desert;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Torii, M Okayama Univ Sci, Dept Biosphere Geosphere Syst Sci, Okayama 7000005, Japan Okayama Univ Sci Okayama Japan 7000005 , Okayama 7000005, Japan
Citazione:
M. Torii et al., "Mineral magnetic study of the Taklimakan desert sands and its relevance tothe Chinese loess", GEOPHYS J I, 146(2), 2001, pp. 416-424

Abstract

We conducted a mineral magnetic study on sand samples from the Taklimakan desert, Tarim Basin in western China. Modern sands were collected at 19 sites in the central and western parts of the Taklimakan desert. We carried out low-field susceptibility measurements, ARM and IRM acquisitions, high- and low-temperature measurements and hysteresis measurements on these samples. Nearly stoichiometric magnetite is the dominant magnetic mineral of thesesamples. The presence of titanomagnetite is unlikely, and contributions from a high-coercivity mineral(s) are minor. Magnetic grain size is estimatedto be that of larger pseudo-single domain or even greater. We compared thehysteresis data against loess samples from both pristine and weathered loess sections from the Chinese Loess Plateau. We found an apparent decreasinggrain size trend from the Taklimakan to the central Loess Plateau through the western Loess Plateau. These lines of evidence favour the idea that theTaklimakan desert is one of the potential dust source areas, even though it is located more than 2000 km west of the central Loess Plateau.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:38:08