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Rock-magnetic properties of Neogene sediments, northern flank of Tianshan Mountains 被引量:1

Rock-magnetic properties of Neogene sediments, northern flank of Tianshan Mountains
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摘要 Analyses of rock-magnetic properties of Neogene sediments of the Taxihe section, northern Tianshan Mountains, show that the section can be classified into three categories including lacustrine facies, fluvial facies and alluvial facies, which correspond to the lower, middle and upper of the Taxihe section respectively. The magnetic minerals of the lacustrine facies may be affected by the process of weath- ering, lithogenesis and biolithogenesis besides the source of the sediments. The natural remanence intensities are between 10-3 A/m and 10-2 A/m. The minerals are dominated by magnetite and the high coercive magnetic mineral may be goethite. The magnetic grains are the mixture of PSD+SD or SD+SP. The natural remanence intensities of the strata of fluvial facies are between 10-2 A/m and 10-1 A/m, about ten times that of the lacustrine facies. The magnetic minerals are mainly magnetite and hematite, and the magnetic grains are mainly PSD. The characteristic remanence (ChRM) carriers are magnetites. In the alluvial facies, the natural remanence intensities are mostly less than 1×10-2 A/m. The magnetic minerals of the series are dominated by magnetite and hematite, almost the same as the fluvial facies. But the difference is that most of the stepwise demagnetization can reveal two components and the ChRM carriers are hematites. The magnetic grains are PSD in terms of the hysteresis parameters. Analyses of rock-magnetic properties of Neogene sediments of the Taxihe section, northern Tianshan Mountains, show that the section can be classified into three categories including lacustrine facies, fluvial facies and alluvial facies, which correspond to the lower, middle and upper of the Taxihe section respectively. The magnetic minerals of the lacustrine facies may be affected by the process of weathering, lithogenesis and biolithogenesis besides the source of the sediments. The natural remanence intensities are between 10?3 A/m and 10?2 A/m. The minerals are dominated by magnetite and the high coercive magnetic mineral may be goethite. The magnetic grains are the mixture of PSD+SD or SD+SP. The natural remanence intensities of the strata of fluvial facies are between 10?2 A/m and 10?1 A/m, about ten times that of the lacustrine facies. The magnetic minerals are mainly magnetite and hematite, and the magnetic grains are mainly PSD. The characteristic remanence (ChRM) carriers are magnetites. In the alluvial facies, the natural remanence intensities are mostly less than 1 × 10?2 A/m. The magnetic minerals of the series are dominated by magnetite and hematite, almost the same as the fluvial facies. But the difference is that most of the stepwise demagnetization can reveal two components and the ChRM carriers are hematites. The magnetic grains are PSD in terms of the hysteresis parameters.
出处 《Science China Earth Sciences》 SCIE EI CAS 2007年第4期544-554,共11页 中国科学(地球科学英文版)
基金 Supported by Major State Basic Research Program of China (Grant No. 2001 CB409804).
关键词 NORTHERN FLANK of TIANSHAN Mountains NEOGENE MAGNETIC carrier IRM temperature-dependent susceptibility Day plot Northern flank of Tianshan Mountains Neogene magnetic carrier IRM temperature-dependent susceptibility Day plot
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  • 1Michael E.Evans, Friedrich Heller. . 2003
  • 2Tauxe L,Mullender T A T,Pick T.Potbelhes, wasp-waists, and su- perparamagnetism in magnetic hysteresis. Journal of Geophysical Research . 1996
  • 3Thompson R,Bloemendal J,Dearing J A,et al.Environmental ap- plications of magnetic measurements. Science . 1980
  • 4Dunlop D J,?zdemir ?.Rock Magnetism: Fundementals and Fron- tiers. . 1997
  • 5Dunlop D J,?zdemir ?.Rock Magnetism: Fundamentals and Fron- tiers. . 1997
  • 6Pan Y X,Zhu R X,Banerjee S K.Rock-magnetic properties related to thermal-treatment of siderite: Behavior and interpretation. Journal of Geophysical Research . 2000
  • 7Kirschvink J L.The least-squares line and plane and the analysis of palaeomagnetic data, Geophys J R. Astr Soc . 1980
  • 8Sun J,Zhu R,Bowler J.Timing of the Tianshan Mountains uplift constrained by magnetostratigraphic analysis of molasses deposits. Earth and Planetary Science . 2004
  • 9Deng Q D,Feng X Y,Zhang. P Z,et al.Active Tectonics of the Chi- nese Tianshan Mountain (in Chinese). . 2000
  • 10Day R,Fuller M,Schmidt V A.Hysteresis properties of titanomag- netites: Grain-size and compositional dependence. Physics of the Earth and Planetary Interiors . 1977

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