一、Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance（论文文献综述）
LI HuaYong,ZHANG HuCai,CHANG FengQin,ZHENG Qian,ZHANG WenXiang,LEI GuoLiang,LEI YanBin,PU Yang,JI JunFeng[1]（2017）在《Discovery of bacteriopheophytin-a in lacustrine deposits from Lake Zigetang on the central Tibetan Plateau and its paleoenvironmental significance》文中认为Lake Zigetang is located on the central Tibetan Plateau（TP） and represents a rare but typical meromictic lake in China.The lake’s stable meromixis sustains microflora communities, and changes in these communities are relatively independent of climate. Therefore, these communities can be used as paleoclimate proxies. In this paper, the stratification properties and their relationships with the microflora of Lake Zigetang were analyzed. We found that water depth and climate conditions were two important factors for maintaining meromixis in Lake Zigetang. Generally, stratification was enhanced during warm periods, while temperature differences between the mixolimnion and monimolimnion were decreased during cold periods. The presence of anoxygenic phototrophic bacteria（APB） was demonstrated by the discovery of bacteriopheophytin-a（Bph-a） in the sediments.This bacterial community is mainly concentrated at the bottom of the chemocline and the top of the monimolimnion, where it forms a thin APB layer. Moreover, total APB productivity is mainly affected by the light intensity penetrating to the APB layer,which exponentially increases as the thermocline becomes shallow. Therefore, high Bph-a values in the lake corresponded to a shallow thermocline and warm periods, low Bph-a values corresponded to cold periods, and zero changes indicated that the water was completely mixed and reflected an extreme cold climate or low lake level period. Thus, Bph-a can be used as a climate proxy to reconstruct the history of lake stratification and climate changes.
LIANG Jie,LI Dong,WANG MingDa,ZHANG XinYu,HOU JuZhi[2]（2016）在《Application of orthogonal design to the extraction and HPLC analysis of sedimentary pigments from lakes of the Tibetan Plateau》文中研究说明Sedimentary pigments are useful proxy indicators of phytoplankton biomass, community structure, primary productivity and human influence in lacustrine and oceanic ecosystems. Pigments are relatively labile due to their complex chemical structures, which makes the extraction and analysis of sedimentary pigments challenging. In addition, it is important to select appropriate methods to study sedimentary pigments in regions which lack previous investigations. In this study, we adopted the L9（34） orthogonal design to develop methods of extraction and HPLC（high performance liquid chromatography） analysis of sedimentary pigments at two lakes on the Tibetan Plateau: meromictic lake-Dagze Co and dimictic lake-Jiang Co. The orthogonal design comprises 9 combinations of various parameters for extraction and HPLC analysis. The results show that the type and volume of solvent are the most important factors for pigment extraction, and the mobile phase and column selection are the most important for HPLC analysis. For the study sites, we found that the best methods to extract sedimentary pigments are as follows: the use of a mixture of acetone:methanol:water（80:15:5, v:v:v） as the extraction solvent; solvent/sample ratio of 10 m L/g; sonication for 30 s and standing extraction for 6 h. The best methods for HPLC analysis are as follows: Zorbax Eclipse plus C8 column with mobile phase A, methanol:acetonitrile:0.25 M aqueous pyridine（50:25:25, v:v:v） and mobile phase B, methanol: acetonitrile: acetone（20:60:20, v:v:v）; p H of mobile phase A adjusted to 6 with acetic acid; and HPLC column temperature maintained at 40°C. The study provides an experimental basis for future investigations of past changes in primary productivity and the response of lake ecosystems to climate change and human activities on the Tibetan Plateau.
梁洁,李栋,王明达,张鑫雨,侯居峙[3]（2016）在《利用正交实验法优化青藏高原湖泊沉积色素提取与分析》文中研究表明沉积色素已经成为反映浮游植物生物量和群落结构的有效指标,被广泛应用到研究过去湖泊和海洋生态系统初级生产力变化及其对气候变化与人类活动的响应中.但是由于色素的特殊化学属性,不同的提取和分析方法对不同介质中的色素具有明显的选择性.因此,在不同区域,为获得浮游植物生物量和群落结构等信息,需要选择合适的色素提取和分析方法.本文利用L9（34）正交实验方案,对青藏高原中部典型半对流型湖泊（达则错）和双季对流型湖泊（江错）表层沉积物进行对比研究,选择适用于青藏高原湖泊沉积色素的提取和分析方法.对比发现提取试剂的类型及含量、色谱柱和流动相分别是影响湖泊沉积色素提取与分析过程中的关键因素.利用丙酮:甲醇:水混合试剂（80:15:5,体积比）,冰浴超声30s并低温静置6h对于青藏高原湖泊沉积色素提取具有最佳提取效率.在进行色素分析时,反相高效液相色谱（RP-HPLC）系统中采用Eclipse Plus C8色谱柱（150mm×4.6mm,粒径为3.5mm）,流动相A为甲醇:乙腈:0.25m吡啶（50:25:25,体积比）;流动相B为甲醇:乙腈:丙酮（20:60:20,体积比）,流动相A的pH利用醋酸调节为6,柱温保持40℃时,色素分离效果最好.本研究为进一步利用青藏高原湖泊沉积色素研究湖泊初级生产力变化和湖泊生态系统对气候变化和人类活动的响应提供了实验基础.
Huayong Li,Hucai Zhang,Fengqin Chang,Xiaoguang Qin[4]（2015）在《Identification of the Eolian Components in Zigetang Co Sediments from the Central Tibetan Plateau》文中进行了进一步梳理It is widely recognized that grain-size distributions of the lacustrine sediment tend to be polymodal and consist of two or more components. However, there is still great uncertainly in explaining the genesis of grain-size components due to the inherent complexity of their polymodal distributions. In this study, the grain-size components of the core sediments of Zigetang-Co, central Tibetan Plateau, were partitioned using the log-normal distribution function method and the relationship between the identity of each component and the specific sedimentary environment was investigated. The data indicate that the core sediments of Zigetang Co contain five distinct unimodal grain-size distributions representing five grain-size components. These components are specified from fine to coarse modes as clay, fine silt, silt, fine to medium sand and coarse sand. The percentage contribution of most sand components is shown to be correlated with eolian activities, only small number is probably correlated with water depth changing.
Mingda Wang,Juzhi Hou,Yanbin Lei[5]（2014）在《Classification of Tibetan lakes based on variations in seasonal lake water temperature》文中指出Widespread lakes on the Tibetan Plateau（TP）are valuable archives for investigating climate and environment changes, which could provide essential information on the mechanisms of past climate changes on the TP and their interaction with the global climate systems.However, there is a lack of in-depth investigation of modern limnological processes in the Tibetan lakes, which hampers the understanding of paleolimnological records and lake ecosystem succession. In this study, we performed continuous temperature monitoring at two lakes, Bangong Co, a freshwater lake in the western TP, and Dagze Co, a brackish lake in the central TP, in order to characterize the patterns of seasonal temperature variability, stratification,and mixing. Temperature data for an entire hydrological year demonstrate that Bangong Co is a dimictic lake and that Dagze Co is a meromictic lake. The higher salinity in the deep water at Dagze Co prevents the lake from overturning completely, and this finding is supported by simulations using a physical limnological model Lake Analyzer. Continuous lake water temperature monitoring provides fundamental data for classifying Tibetan lakes, as well as the hydrological basis for understanding their paleolimnological records and ecosystem succession.
吕荣平[6]（2008）在《西藏佩枯错盆地沉积演化及构造模拟》文中进行了进一步梳理佩枯错盆地位于喜马拉雅山与冈底斯山之间的藏南谷地内,为一晚新生代断陷盆地。盆地基底由中生界褶皱地层组成,盆地内为一套早更新世—全新世湖相沉积地层,是西藏藏南谷地内已知第四纪地层出露最完整、最厚的地区之一。佩枯错盆地作为一个晚新生代喜马拉雅山碰撞造山带内部的山间盆地,其沉积演化、控盆构造与喜马拉雅山的形成发展密切相关。本研究以野外调查为重点,在盆地内开展沉积地层、构造地貌、控盆断裂、构造应力场、古气候环境、铀系、ESR沉积年代学等研究,重点研究了盆地的沉积演化和控盆断裂构造性质。得出的主要结论如下:1.开展了详细露头剖面观测和系统采样工作,进行了沉积体系特征和沉积相分析,共划分出3个沉积体系域:水进体系域、湖泊扩展体系域和湖泊收缩体系域;2个沉积相,3个沉积亚相,主要由冲积相、湖泊相组成;2.在沉积特征、层序地层、气候、物源以及沉积年代的分析基础上,综合露头资料,进行了第四纪地层划分。在佩枯错盆地共建1个群:佩枯错群;4个组:下更新统拉洋组、中更新统茫家冻组、上更新统帮荣组和全新统罗马仁布组,在藏南谷地首次建立起了第四系的完整湖相沉积剖面;3.佩枯错盆地早更新世-全新世构造—沉积演化可以划分为三个阶段:初始断陷阶段（拉洋组和茫家冻组）、强烈断陷阶段（帮荣组第一岩段）、稳定阶段（帮荣组二、三岩段和罗马仁布组）;4.对佩枯错盆地形成演化的控制因素进行了探讨。研究认为盆地的形成、沉积空间的展布均明显受到其南北两侧断裂构造活动的控制,提出佩枯错盆地是一翘板式箕状断陷盆地;5.利用SRTM数据,开展佩枯错盆地的区域构造地貌分析,研究发现盆地内湖相沉积物的展布空间严格受早期构造活动的控制,走向近东西;而现今残留湖盆佩枯错的地貌形态则受到晚期断裂构造活动的影响,走向近南北;6.采用有限元法对佩枯错盆地构造应力模拟计算结果表明,盆地的发育过程明显受盆地两侧边界断裂控制。佩枯错盆地的产生是在整体南北向挤压应力作用下,不同块体差异隆升作用的结果。其南侧控盆断裂为北倾正断层,北侧控盆断裂为南倾逆断层,二者共同组成了南降北升的翘板式断陷盆地。
Andreas LüCKE,Bernd WüNNEMANN[7]（2007）在《Holocene climate change in the Central Tibetan Plateau inferred by lacustrine sediment geochemical records》文中提出Multi-proxies of lacustrine sediments, such as total carbon （TC）, total organic carbon （TOC）, total inorganic carbon （TIC）, total nitrogen （TN）, total sulfur （TS）, hydrogen index （HI）, oxygen index （OI） and stable carbon isotopic composition of organic matter （δ 13Corg）, were analyzed using a 7.3 m core from Zigê Tangco. The source of the organic matter in the sediment was mainly from autochthonous phytoplankton, therefore the significances of proxies can be interpreted as that high TOC, TOC/TS, HI and δ13Corg values, low TC, TIC values corresponded to warm and wet climatic condition, and vice versa. The process of climatic development in the Zigê Tangco region was hence recovered. During the early and Mid-Holocene, the climate was warm and wet and intensive cold events occurred during the periods of 8600 to 8400 cal a BP and 7400 to 7000 cal a BP. In the second half of Holocene, the climate became cold and dry gradually. The palaeoclimatic process during Holocene in Zigê Tangco region matched well with that in Co Ngoin region which is ca 40 km to the south-east. Therefore this palaeoclimatic process represents the Holocene climatic feature in the Central Tibetan Plateau which has the same pattern in the Northern Tibetan Plateau, but the time and duration of some climatic events might be different. We can conclude that in Holocene solar insolation controlled the climatic pattern on the central Tibetan Plateau.
于守兵,李世杰,刘吉峰[8]（2005）在《青藏高原湖泊沉积研究及其进展》文中指出青藏高原湖泊沉积研究主要围绕青藏高原隆升和全球变化响应开展的。研究揭示了青藏高原隆升具有整体性、阶段性和后期加速性。中晚更新世以来和末次间冰期-冰期气候演化过程得到重建,并能够与冰芯和深海氧同位素记录对比;同时也存在MIS3阶段强烈暖湿和末次冰盛期冷湿等区域特征;新仙女木事件在湖泊沉积物也有明显记录。全新世研究表明青藏高原早期暖湿并经历冷事件,大暖期普遍出现高水位,后期气候向干冷化方向发展。湖泊沉积环境定量化重建也得到研究。青藏高原湖泊沉积应在高分辨率纹层沉积和环境指标定量分析基础理论方面加强研究。
李万春,李世杰,尹宇,季江,濮培民[9]（2001）在《Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance》文中研究指明Zige Tangco （4560 m a.s.l.）, located in central Tibetan Plateau, was first discovered in China to be a meromictic lake. The meromixis was caused possibly by virtual sheltering due to the lake basin’s morphometry, and to a less extent by surface inflow of fresh water. As the highest meromictic lake ever discovered in the world, Zige Tangco could provide some insight into world lake systematic classification, and a potential site for present-day lake processes and lacustrine varve studies.
贾玉连,施雅风,王苏民,蒋雪中,李世杰,王爱军,李徐生[10]（2001）在《Lake-expanding events in the Tibetan Plateau since 40 kaBP》文中研究说明Since 40 kaBP, the current endorheism on the Tibetan Plateau had experienced at least four lake-expanding events, at 40-28 kaBP, 19-15 kaBP, 13-11 kaBP, 9.0-5.0 kaBP, respectively. The 40-28 kaBP and 9.0-5.0 kaBP lake-expanding events, corresponding to the global warming periods, were mainly determined by the abundant summer monsoon rainfall brought by strong Indian monsoon, aroused by enhanced solar radiation at earth orbital precessional cycle. The 40-28 kaBP lake-expanding event, also called the great lake period or the pan-lake period, for several great lake groups had come into being by the interconnection of the presently isolated and closed lake catchments. The total lake area over the Tibetan Plateau was estimated at least up to 150000 km2, 3.8 times of the present, and the lake supply coefficients were about 3-10. The 9.0-5.0 kaBP lake-expanding, with a total lake area of 68000 km2, less than the above mentioned reflected the Indian monsoon rainfall less than that of 40-28 kaBP. The expanded lak
二、Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance（论文开题报告）
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三、Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance（论文提纲范文）
（6）西藏佩枯错盆地沉积演化及构造模拟（论文提纲范文）
| 摘要 |
| Abstract |
| 目录 |
| 绪论 |
| 一、佩枯错盆地研究概况 |
| 二、选题依据和研究意义 |
| 三、湖泊沉积国内外研究现状 |
| 四、研究内容、目标和工作方案 |
| 第一章 研究区自然地理及地质概况 |
| 第一节 自然地理概况 |
| 第二节 区域地层特征 |
| 第三节 区域岩浆岩 |
| 第二章 区域湖相地层及佩枯错盆地湖相沉积特征 |
| 第一节 区域湖相地层分布 |
| 第二节 区域湖相地层划分 |
| 第三节 佩枯错盆地湖相地层的年代学研究 |
| 第四节 佩枯错盆地层序地层划分及特征 |
| 第五节 佩枯错群的建立 |
| 第六节 佩枯错盆地多重地层划分 |
| 第三章 区域构造及佩枯错盆地构造特征 |
| 第一节 大地构造背景 |
| 第二节 区域构造背景 |
| 第三节 盆地构造特征 |
| 第四节 岩石磁组构分析 |
| 第四章 佩枯错盆地气候环境分析 |
| 第一节 孢粉分析 |
| 第二节 介形分析 |
| 第三节 粒度、碳酸盐、磁化率分析 |
| 第五章 佩枯错盆地构造地貌及构造应力场分析 |
| 第一节 佩枯错盆地构造地貌分析 |
| 第二节 佩枯错盆地构造应力场分析 |
| 结论 |
| 致谢 |
| 参考文献 |
| 个人简历 |
| 学习期间发表学术论文 |
| 学习期间主要参与的科研项目 |
（7）Holocene climate change in the Central Tibetan Plateau inferred by lacustrine sediment geochemical records（论文提纲范文）
| 1 General introduction of study site |
| 2 Material and method |
| 3 Results and discussion |
| 3.1 Geochronology |
| 3.2 Variations of TC, TOC, TS, HI and OI |
| 3.3 δ 13Corg |
| 3.4 Provenance of organic matter |
| 3.5 Climatic significance of geochemical indexes |
| 3.6 Holocene paleoclimatic development in ZigêTangco |
| 4 Conclusion and discussion |
（8）青藏高原湖泊沉积研究及其进展（论文提纲范文）
| 1 近30年研究历程 |
| 1.1 研究重点区域 |
| 1.2 研究重点的变化 |
| 1.3 青藏高原湖泊沉积研究方法及手段 |
| 2 研究成果 |
| 3 研究展望 |
| 3.1 开展高分辨率湖泊纹层研究 |
| 3.2 加强环境代用指标定量化研究 |
| 3.3 数学工具运用 |
（9）Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance（论文提纲范文）
| 2 Chemocline discovery and character |
| 3 Discussion |
| 4 Significance of meromixis discovery |
（10）Lake-expanding events in the Tibetan Plateau since 40 kaBP（论文提纲范文）
| 1 Methods and data processing |
| 1.1 Lake level and climate change |
| 1.2 Sensitive degree of lake |
| 1.3 Lake-expanding period/event |
| 1.4 Data resource and processing |
| 2 Lake expanding events and their relevant records |
| 2.1 9.0—5.0 kaBP lake-expanding event |
| 2.2 13—11 kaBP lake-expanding event |
| 2.3 19—15 kaBP lake-expanding event |
| 2.4 40—28 kaBP lake-expanding event |
| 3 Correlation of climate records |
| 4 Causes of lake-expanding events |
| 5 Discussion and conclusions |
四、Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance（论文参考文献）
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- [6]西藏佩枯错盆地沉积演化及构造模拟[D]. 吕荣平. 中国地质科学院, 2008(04)
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