| 现代湖泊沉积物中磁性矿物的研究及其环境意义 |
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| 引用本文： | 孙知明,胡守云.现代湖泊沉积物中磁性矿物的研究及其环境意义[J].地球物理学报,1996,39(2):178-187. |
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| 作者姓名： | 孙知明 胡守云 |
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| 作者单位： | 1. 地质矿产部地质力学研究所, 北京 100081;
2. 中国科学院南京地理与湖泊研究所, 南京 210080;
3. 地质矿产部地质力学研究所, 北京 100081 |
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| 摘 要： | 通过固城湖沉积物中高分辨率的岩石磁学取样及其实验研究，取得了环境磁学参数及各种磁参数的比值随深度的变化曲线，结合其他气候指标和同位素年龄结果，表明湖泊沉积中磁参数及其比值的变化能与末次晚冰期以来的古气候变化很好地相对应，尤其是在４．００ｍ和１２．０３ｍ的气候转折点上，沉积物中环境磁参数及其比值同样出现明显的变化，有力地说明沉积物中磁参数及其比值能很好地记录湖泊沉积物沉积时的古气候变化，并且可用来认识古环境突变的界线．
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| 关 键 词： | 环境磁学 湖泊沉积 磁参数 古气候 |
| 收稿时间： | 1995-02-17 |
A ROCK-MAGNETIC STUDY OF RECENT LAKE SEDIMENTS AND ITS PALAEOENVIRONMENTAL IMPLICATION |
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| SUN ZHI-MING.A ROCK-MAGNETIC STUDY OF RECENT LAKE SEDIMENTS AND ITS PALAEOENVIRONMENTAL IMPLICATION[J].Chinese Journal of Geophysics,1996,39(2):178-187. |
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| Authors: | SUN ZHI-MING |
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| Institution: | 1. Institute of Geomechanics, Ministry of Geology and Mineral Resources, Beijing 100081, China;
2. Nanjing Institute of Geography and Limnology, Academia Sinica, Nanjing 210080, China;
3. lnstitute of Gemechonics, Ministry of Geology and Mineral Resources, Beijing 100081, China |
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| Abstract: | Based on the experimental study of high resolution environmental magnetism and radio-Carbon dating from Gucheng lake sediments, we tested that the downcore variations in various magnetic parameters exhibit coherent fluctuation with palaeoclimatic changes recorded by other palaeoclimatic information since the last lateglacial, in addition, the magnetic parameters also exhibit a definite response at the boundary (about 4.00m and 12.03m) of palaeoclimatic abrupt changes, these results suggest that rock-magnetic method can be used to detect and characterize the palaeoclimatic changes in the sediments. |
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| Keywords: | Environmental--magnetism Lake sediments Magnetic parameters Palaeoclim ate |
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