青海盐湖锂资源综合利用规模探讨          下载免费PDF全文

熊增华  王兴富  王石军  童阳春  吴盛斌 《盐湖研究》2020,28(4):125-131

锂是战略新兴产业的“关键原料”,已入国家战略新兴产业矿产。当前和可预见的未来,新能源、人工智能、航空航天等都离不开锂原料。有机构预测全球锂需求量将从2017年24万吨增加到2025年的83万吨LCE(碳酸锂当量)。青海柴达木盆地是我国锂资源富集地,为探讨青海盐湖锂资源的合理开发规模,分析了锂盐开发的矿床特性、钾肥规模、开采方式、盐田精制浓缩工艺等影响因素,以察尔汗盐湖为例计算其开发规模,提出“先锂后钾”重点研发低含量卤水提锂技术、全流程工艺优化、构建锂资源产业集群等建议,将有利于科学规划青海盐湖锂资源开发,促进我国盐湖锂产业可持续发展。  相似文献   

环青海湖地区湿地变化初步研究   总被引：4，自引：0，他引：4  

李凤霞  肖建设  郭安红  吴素霞  朱西德 《中国沙漠》2007,27(6):1018-1021

 以遥感、地理信息系统和全球定位系统为主，应用空间对地观测的技术资源和数据资源，结合地面考察资料和已有的研究成果，对环青海湖地区的湿地类型和面积变化进行研究，结果发现：研究区内的湿地分为天然湿地和人工湿地两大类，其中天然湿地分为沼泽、河流、湖泊。天然湿地的面积在13 a内出现了不同程度的变化，其中沼泽面积有所扩大，而河流、湖泊面积缩小。造成这种变化的主要原因是气候暖干化和人类活动的共同影响。  相似文献   

西藏羊卓雍湖流域近45 年气温和降水的变化趋势   总被引：4，自引：0，他引：4  

杜军  胡军  唐述君  鲍建华  拉巴 《地理学报》2008,63(11):1160-1168

利用西藏羊卓雍湖流域气象、水文观测站1961-2005 年逐月的平均气温、降水量等资 料, 分析了近45 年流域气温、降水的年际和年代际变化特征和异常年份, 以及羊湖水位变化趋势及影响因子, 结果表明： 近45 年流域年平均气温以0.25 ^oC/10a 的速率显著升高, 增温主要表现在秋、冬季。近25 年, 流域平均降水量除冬季呈减少趋势外, 其他各季节表现为显 著的增加趋势, 增幅为11.4~30.0 mm/10a, 夏季增幅最大; 年降水量以54.2 mm/10a 的速率明显增加。20 世纪60 年代至90 年代, 除夏季外, 其他3 季表现为逐年代增温趋势。在夏季, 降水量除80 年代偏少外, 其他3 个年代偏多; 而冬季相反, 80 年代降水偏多, 其他3 个年代偏少。流域年平均气温异常偏高年出现过3 次, 且发生在20 世纪90 年代末至21 世纪初; 60 年代后期和70 年代初降水多异常年份。自1997 年发电以来, 降水量呈增加趋势, 流域平均降水量达409.7 mm, 明显高于平衡降水量, 水位呈较明显的上升趋势。降水增多、日照减少, 以及气温明显升高、冰雪融水增加是造成水位上升的主要原因。  相似文献   

柴达木盆地东部尕海湖DG03孔岩芯粒度特征及环境意义   总被引：1，自引：0，他引：1  

曹广超    马海州  隆浩  陈忠  张西营  周笃筠 《中国沙漠》2008,28(6):1073-1077

对柴达木盆地东部尕海湖DG03孔岩芯沉积物的粒度特征的研究,结果表明:在12 800—11 800 cal a BP之间,DG03孔沉积物主要以砂为主,含少量的粉砂和粘土,表明钻孔地点的水动力条件比较强,湖泊水位较低,尕海地区经历了一次短暂的干旱事件,这一事件可能是该区域对全球性的YD事件的响应;全新世早中期（11 800—5 600 cal a BP）,沉积物主要以粉砂和粘土为主,钻孔地点的水动力条件比较弱,湖泊水位较高,气候环境相对湿润;全新世中晚期以来（5 600 cal a BP以来）,沉积物中砂粒组分含量越来越多,粉砂和粘土含量越来越少,平均粒径越来越大,钻孔地点的水动力越来越强,该区域经历了一个干旱化的过程。  相似文献   

Radionuclide (Cs and K) concentrations in the muscle of Baikal seal (Pusa sibirica) from Lake Baikal     

M. Udaka  T. Ikemoto  S. Takahashi  E.A. Petrov 《Marine pollution bulletin》2009,58(2):290-294

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The late Holocene mollusc fauna of the Aral Sea and its biogeographical and ecological interpretation     

Andrei Filippov 《Limnologica》2009,39(1):67-85

The Aral Sea, in 1960 the fourth largest lake on Earth, has since experienced a catastrophic environmental change, which appears to be mainly a result of human impact. Here, we attempt to add to a better understanding of environmental changes during the last millennium by using fossil mollusc assemblages obtained from 10 sediment cores, which were taken by gravity coring in 1991. The biogeographical analysis demonstrates that no endemic molluscs have existed in the Aral Sea during the last 1000 years. The investigated taxa are of Caspian and Palaearctic origin. The molluscan biodiversity is much lower than previously assumed and particularly low for such a large lake, indicating unstable ecological conditions during the period investigated. Using comparative ecological analyses of thanatocoenoses and stable isotope ratios in gastropod shells, we conclude that the main lake level changes of the last millennium were strong and abrupt, showing relative high stands at about 1300 AD and 1650 AD.  相似文献   

长江中下游水阳江流域BZK0402孔多重地层划分及其冰后期海平面变化的沉积响应          下载免费PDF全文

陈忠良  张晋喆  沈仕豪  黄蒙  徐锦龙  葛海影  SimonM.Jowitt 《中国地质》2022,49(2):655-666

[研究目的]开展水阳江流域标准孔BZK0402孔多重地层划分,探讨长江支流水阳江流域冰后期海平面变化的沉积响应以及古丹阳湖的成因和形成时代.[研究方法]以岩石地层为基础,在磁性地层和年代地层的双重约束下,对BZK0402孔进行多重地层划分.对比分析BZK0402孔和长江河谷、长江三角洲等邻区钻孔.[研究结果]BZK04...  相似文献   

Macrozoobenthic community of Fuxian Lake, the deepest lake of southwest China     

Yong-De Cui  Xue-Qin Liu  Hong-Zhu Wang   《Limnologica》2008,38(2):116-125

Located in the Yunnan–Guizhou Plateau in southwest China, Fuxian Lake covers an area of 211 km², with maximum depth of 155 m. It is known to have a unique fauna, including 14 described endemic species. In order to describe the zoobenthic community of the lake more completely, the present study was conducted from August 2002 to August 2003. Altogether 62 benthic taxa, including 22 oligochaetes, 21 molluscs and 18 insects were identified, of which the dominant taxa belonged to Potamothrix, Procladius and Paraprososthenia. The standing stocks of benthos were much higher in the littoral (824 ind/m² in density, 3.72 g/m² in biomass) than in the profundal region (23 ind/m² in density, 0.10 g/m² in biomass). Species richness was greatest in summer and standing stocks were larger in spring and summer than in other seasons. Analyses of functional feeding groups indicated that collector-gatherers and scrapers were predominant in entire lake. Stepwise multiple regression analysis demonstrated that the water depth is the most important factor affecting the distribution of macrozoobenthos.  相似文献   

近20年青海湖湖水面积变化遥感   总被引：11，自引：6，他引：5  

刘瑞霞  刘玉洁 《湖泊科学》2008,20(1):135-138

采用NOAA/AVHRR资料,对青海湖湖面进行水体判识,并利用线性混合模式对混合象元进行处理,定量估算了近20年青海湖湖水面积并分析了变化趋势,表明近20年青海湖湖水面积在不断减小,每年减少约4km2,并且青海湖干涸部分主要在其北部.进一步采用主成分分析和回归分析方法对青海湖地区降水、气温和蒸发量做了初步气候分析,表明青海湖地区降水减少、气温升高、蒸发量增加是青海湖湖水面积逐年减少的主要原因.  相似文献   

The last 40 ka tephrostratigraphic record of Lake Ohrid,Albania and Macedonia: a very distal archive for ash dispersal from Italian volcanoes     

B. Wagner  R. Sulpizio  G. Zanchetta  S. Wulf  M. Wessels  G. Daut  N. Nowaczyk 《Journal of Volcanology and Geothermal Research》2008

A 1075 cm long core (Lz1120) was recovered in the south-eastern part of the Lake Ohrid (Republics of Macedonia and Albania) and sampled for identification of tephra layers. Magnetic susceptibility investigations show rather high magnetic values throughout the core, with peaks unrelated to the occurrence of tephra layers but instead to the relative abundance of detrital magnetic minerals in the sediment. Naked-eye inspection of the core allowed us to identify of two tephra layers, at 896–897 cm and 1070–1075 cm. Laboratory inspection of the grain-size fraction > 125 μm allowed for the identification of a third cryptotephra at 310–315 cm. Major element analyses on glass shards of the tephra layers at 896–897 cm and 1070–1075 cm show a trachytic composition, and indicate a correlation with the regionally dispersed Y-3 and Y-5 tephra layers, dated at ca 30 and 39 cal ka BP. The cryptotephra at 310–315 cm has a mugearitic–benmoreitic composition, and was correlated with the FL eruption of Mt. Etna, dated at 3370 ± 70 cal yr BP. These ages are in agreement with five ¹⁴C AMS measurements carried out on plant remains and macrofossils from the lake sediments at different depths along the core.  相似文献