| 青藏高原清水河多年冻土区湖沼环境变迁 |
| |
| 引用本文： | 林清,王国尚,程国栋,耿安松,张干,傅家谟.青藏高原清水河多年冻土区湖沼环境变迁[J].海洋与湖沼,1999,30(6):744-750. |
| |
| 作者姓名： | 林清 王国尚 程国栋 耿安松 张干 傅家谟 |
| |
| 作者单位： | 中国科学院兰州冰川冻土研究所冻土工程国家重点实验室 兰州730000;中国科学院兰州冰川冻土研究所冻土工程国家重点实验室 兰州730000;中国科学院兰州冰川冻土研究所冻土工程国家重点实验室 兰州730000;中国科学院广州地球化学研究所有机地球化学国家重点实验室 广州510640;中国科学院广州地球化学研究所有机地球化学国家重点实验室 广州510640;中国科学院广州地球化学研究所有机地球化学国家重点实验室 广州510640 |
| |
| 基金项目： | 国家自然科学基金!495721117，广州有机地球化学国家重点实验室基金!OGL-9403 |
| |
| 摘 要： | １９９４年１０月，利用钻探取样方法获得了位于青藏高原多年冻土区的清水河孔深为８．３ｍ的Ｑ１孔湖沼沉积物样品，对该孔５０－６４０ｃｍ样品的有机地球化学分析结果表明，剖面样品中有机质具有相同的成熟度，且具有有机碳、氢指数、可溶有机质和族组成相同的变化特征，样品正烃碳数分布在Ｃ１６－Ｃ３５之间，主峰为Ｃ２３，高碳戏呈明显的偶奇优势，表明它们来源于植物。ＯＥＰ值大于２，Ｐｒ／Ｐｈ均大于１，反映沉积环境处于
|
| 关 键 词： | 湖沼沉积 湖沼 环境变迁 清水河 多年冻土区 |
| 收稿时间： | 4/5/1998 12:00:00 AM |
| 修稿时间： | 1999/4/10 0:00:00 |
QINGSHUIHE LIMNETIC ENVIRONMENTAL CHANGE IN THE PERMAFROST REGION OF QINGHAI-XIZANG PLATEAU |
| |
| LIN Qing,WANG Guo-shang,CHENG Guo-dong,GENG An-song,ZHANG Gan and FU Jia-mo.QINGSHUIHE LIMNETIC ENVIRONMENTAL CHANGE IN THE PERMAFROST REGION OF QINGHAI-XIZANG PLATEAU[J].Oceanologia Et Limnologia Sinica,1999,30(6):744-750. |
| |
| Authors: | LIN Qing WANG Guo-shang CHENG Guo-dong GENG An-song ZHANG Gan and FU Jia-mo |
| |
| Institution: | State Key Laboratory of Frozen Soil Engiheering, Lanzhou Institute of Glaciology and GeocryologyThe Chinese Academy of Science, Lanzhou, 73000;State Key Laboratory of Frozen Soil Engiheering, Lanzhou Institute of Glaciology and GeocryologyThe Chinese Academy of Science, Lanzhou, 73000;State Key Laboratory of Frozen Soil Engiheering, Lanzhou Institute of Glaciology and GeocryologyThe Chinese Academy of Science, Lanzhou, 73000;State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, The Chicese Academy of Science, Guangzhou, 510640;State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, The Chicese Academy of Science, Guangzhou, 510640;State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, The Chicese Academy of Science, Guangzhou, 510640 |
| |
| Abstract: | Organic geochemisny in frozen limnehc secliments can be used to recon struct the Paloenvironment because of good preservation of organic matter under low temperatUre. In thes work,an 830cm long core sample of the frozen limntic sediments was collected from Qngshinhe, a typical permafrost region in Qnghaiouzang plateau, and the orgedc matter in the core samples from 50-640cm has been studied. The orgahic matter, which has the same maturity, was mainly derived from the single species of high planL The content of total orgedc carbon (TOC), hydrogen index (HI), extracted orgboc mader (EOM) and the composition of groups have the same variations in this profile, suggeshng that at least four warmer climatic periods have occrmd in this region. In sediments from 135 to 180cm, the different distributions of normal alkans, which range from C16-C35 with the maximum of C23 and the remarkabe odtheven predondnance (OEP), and the different compositions of steranes and hopans mny imply the chanes of water depth and environmntal moistUre and temperature. At the same hme, the OEP and Pristane / Phytan (Pr / Ph, which are grether 2 and 1, respechvely, indicate tha the sedimenop environrnent was rich in oxygen and had a shallow water depth. |
| |
| Keywords: | Qnghai-Xizang plateau Frozen limntic sediments permafrost region Organic geochemistry Limnetic environmntal change |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《海洋与湖沼》浏览原始摘要信息 |
| 点击此处可从《海洋与湖沼》下载免费的PDF全文 |
|
