The spatial distribution and sedimentary processes of organic matter in surface sediments of Nam Co, Central Tibetan Plateau
The spatial distribution and sedimentary processes of organic matter in surface sediments of Nam Co, Central Tibetan Plateau
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青藏高原中部纳木错表层沉积物有机质空间分布及沉积过程
DOI：
10.1007/s11434-012-5500-9
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发表时间：
2012-12
影响因子：
--
通讯作者：
Lin Xiao
中科院分区：
文献类型：
--
作者：
Wang Yong;Zhu LiPing;Wang JunBo;Ju JianTing;Lin Xiao
对西藏纳木错地区67个表层沉积物样品进行了总碳、总有机碳和总氮分析，并对其中51个样品进行了正构烷烃分析。在此基础上，探讨了有机质的来源和空间分布特征，并讨论了影响有机质空间分布格局的控制因素及其古湖沼学意义。结果表明，纳木错表层沉积物中有机质的来源与正构烷烃的来源一致，主要是沉水植物，其次是陆生植物，最后是水生藻类和细菌。湖泊表层沉积物有机质具有典型的空间变异性。由于受水下地形、河流输入和水质等因素的影响，有机质的空间分布呈现出从源区向存款中心富集的特征。这种有机质的空间变异性表明，不同地区沉积物对环境变化的敏感性不同，这对利用湖泊沉积物柱样重建古环境和古气候具有重要意义。
In this study, 67 surface sediment samples collected from Nam Co in central Tibet were analyzed for total carbon, total organic carbon and total nitrogen, and 51 of these samples were also analyzed forn-alkanes. The origin and spatial distribution of organic matter were then investigated using these proxies, and the control factors responsible for the spatial distribution patterns and paleolimnological significance were discussed. The results indicated that the origin of organic matter in surface sediment of Nam Co is consistent with the sources ofn-alkanes, which were primarily submerged plants, followed by terrestrial plants, and then aquatic algae and bacteria. The organic matter in surface sediments of the lake showed typical spatial variability. Because of the great influence of underwater topography, river inputs and water quality, the spatial distribution of organic matter is enriched from the source to the deposit center. This spatial variability of organic matter in the lake indicates that the sediments in different areas have different sensitivities to environmental changes, which is important to reconstruction of paleoenvironments and paleoclimate using lake sediment cores.
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DOI：
10.5194/bgd-7-3911-2010
发表时间：
2010-05
期刊：
Biogeosciences Discussions
影响因子：
--
作者：
H. Vogel;M. Wessels;C. Albrecht;H. Stich;B. Wagner
通讯作者：
H. Vogel;M. Wessels;C. Albrecht;H. Stich;B. Wagner
DOI：
10.1579/0044-7447-29.1.2
发表时间：
2000-02
期刊：
--
影响因子：
--
作者：
T. Johnson;K. Kelts;E. Odada
通讯作者：
T. Johnson;K. Kelts;E. Odada
影响因子：
5.3
作者：
K. Kashiwaya;T. Masuzawa;H. Morinaga;K. Yaskawa;Y. Baoyin;Liu Jiaqi;Gu Zhaoyan
通讯作者：
K. Kashiwaya;T. Masuzawa;H. Morinaga;K. Yaskawa;Y. Baoyin;Liu Jiaqi;Gu Zhaoyan
影响因子：
2.7
作者：
CRANWELL P A
通讯作者：
CRANWELL P A
DOI：
10.18307/2009.0117
发表时间：
2009
期刊：
Journal of Lake Sciences
影响因子：
--
作者：
Wang Junbo;Zhu Liping;Daut Gerhard;Ju Jianting;Lin Xiao;W. Yong;Zheng Xiaolin
通讯作者：
Wang Junbo;Zhu Liping;Daut Gerhard;Ju Jianting;Lin Xiao;W. Yong;Zheng Xiaolin