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1.
XIE Chao 《《地质学报》英文版》2014,88(Z1):386-386
正At present,the extraction of lithium from salt lake brine is the new trend of the salt lake industrialization.The saltine lake lithium resources are extremely rich in western china,especially in Qinghai-Tibetan plateau.Brine of salt 相似文献
2.
正Research the evaporating crystalization process of the magnesium sulfate subtypes brine at high temperature from Dalangtan salt lake in Qinghai province.It was revealed that the salt lake is a typical subtype magnesium 相似文献
3.
Wei JIANG Xinqing LEE 《中国地球化学学报》2006,25(B08):12-12
Nitrogen cycle is an important bio-geochemical process in the environment. Measurement of the total nitrogen （TN） is a routine experiment in agriculture, biology and environmental sciences. The Kjeldahl method （KM） and elemental analyzer method （EA） are both commonly used to determine TN. Total nitrogen by EA is the sum of nitrate （NO3）, nitrite （NO2）, organic nitrogen and ammonia. Total nitrogen by KM （TKN） is made up of both organic nitrogen and ammonia. A comparative study focused on the two methods is conducted by analysis of TN in 97 samples from the sediment sequence of Gouchi, a salt lake in North China. KM presents a higher degree of accuracy than EA with a standard deviation of 0.007 vs. 0.024. With the presence of nitrate and/or nitrite nitrogen, however, measurement by KM is considerably lower than that by EA. Therefore, for samples from lake sediment sequences or soils in North China, KM is inapplicable to determining TN because of usually high contents of nitrous salt. Despite the inconsistency, use of both methods to the same samples makes sense in reconstructions of climatic and environmental changes from lake sediments. In Lake Gouchi, the contents of nitrate and nitrite nitrogen vary from 1.40% in the lower part of the sequence to 14.77% in the uppermost part, suggesting a gradual evolution process from a fresh water lake to the present-day salt lake. 相似文献
4.
The purpose of this paper is to discuss from a hydrechemieal and physieochemieal view point the formation of reeent potash deposits in a salt lake lying in a Quarternary depression of a certain basin in China. Its surface brine, which varies seasonally and annually in composition, is of MgSO4 subtype and is highly mineralized with a low metamorphic eoefficient (MgSO4/MgCl2= 0.029). These deposits are distributed at the northern and northeastern banks of the lake, far away from riverwater supply. Mineralogical composition of the deposits is quite simple, eonsisting mainly of halits and earnallites. The formation of natural potash took place as the eoncentration of surface brine reached a certain point during evaporation. Rate of precipitation, eomposition and grain size of the carnallite sediment are largely dependent upon ebanges in brine concentration. The presenee of these recent potash deposits in present-day basins and continental salt lakes demonstrates that continental salt-bearing basins should likewise be taken as promising areas for aneient potassium salt prospecting. 相似文献
5.
Progress and Prospects of Salt Lake Research in China 总被引：3，自引：0，他引：3
ZHENG Mianping ZHANG Zhen KONG Weigang and LIN Yongjie ZHANG Yongsheng LIU Xifang NIE Zhen KONG Fanjing QI Wen Jia Qingxian PU Linzhong HOU Xianhu WANG Hailei 《《地质学报》英文版》2016,90(4):1195-1235
China has unique salt lake resources, and they are distributed in the east of Eurasian salt lake subzone of the Northern Hemisphere Salt Lake Zone, mainly concentrated in the regions with modern mean annual precipitation lower than 500 mm. This paper preliminarily reviews the progress made in salt lake research in China for the past 60 years. In the research of Paleoclimate and paleoenvironment from salt lake sediments, a series of salts have been proposed to be indicators of paleoclimate, and have been well accepted by scholars. The chloride-sulfate depositional regions of the west Qaidam and the east Tarim have been revealed to be the drought center of China since the Quaternary, and more than 6 spreading stages of arid climate(salt forming) have been identified. Five pan-lake periods with highstands have been proved to exist during the late Quaternary on the Tibetan Plateau. In mineral resource prospecting and theories of the forming of salt deposits: the atlas(1:2500000) of hydrochemical zoning of salt lakes on the Tibetan Plateau has been compiled for the first time, revealing the zonal distribution and transition from carbonate type to chloride type from south to north and presenting corresponding mineral assemblages for different type of salt lakes; several large continental salt deposits have been discovered and the theory of continental potash deposition has been developed, including the salt deposition in deep basins surrounded by high mountains, the mineral deposition from multistage evolution through chains of moderate or shallow lakes with multilevels, the origin of potassium rich brines in gravel layers, and the forming of potassium deposits through the inheriting from ancient salt deposits, thus establishing the framework of "Continental Potash Deposition Theory"; several new types of Mg-borate deposits have been discovered, including the ulexite and pinnoite bed in Da Qaidam Lake, Qinghai, the pinnoite and kurnakovite bed in Chagcam Caka, Tibet, the kurnakovite bed in Lake Nyer, and the corresponding model of borate deposition from the cooling and dissolution of boron rich brines was proposed based on principles of geology, physics and chemistry. The anti-floatation-cold crystallization method developed independently has improved the capacity of KCl production to 3 million tons per year for the Qarham, serving the famous brand of potash fertilizer products. One 1.2 million ton K-sulfate production line, the biggest in the world, has been built in Lop Nor, and K-sulfate of about 1.6 million tons was produced in 2015. Supported by the new technology, i.e. brine preparation in winter-cooling-solarization-isolation-lithium deposition from salt gradient solar pond" the highest lithium production base at Zabuye Lake(4421 m), Tibet, has been established, which is the first lithium production base in China that reaches the year production of 5000 tons of lithium carbonate. The concept of Salt lake agriculture(Salt land agriculture) has been established based on the mass growth of Dunaliella and other bacillus-algae and the occurrence of various halophytes in saltmarsh and salt saline-alkali lands, finding a new way to increase arable lands and develop related green industry in salt rich environments. Finally this paper presents some new thoughts for the further research and development on salt science, and the further progress in salt science and technology will facilitate the maturing of the interdisciplinary science "Salinology". 相似文献
6.
《《地质学报》英文版》1986,(3)
The Qarhan potash-magnesium salt deposit, which consists from east to west of four playa districts, namely Huobuxun, Qarhan, Dabuxun and Bieletan, may be divided from bottom to top into three salt beds(S_1, S_2 and S_3), with potash salts mainly occurring in S_3. The paper lays emphasis on the evolutionary history of the deposition of Salt Bed S_3 and the modes of formation of potash salts in the Qarhan playa.The analysis of the data obtained from more than 170 boreholes and the geochemical studies on bromine, magnesium and calcium reveal the existence of four concentration stages and three dilution stages during the ormation of the Upper Salt Bed S_3. In the process of concentration, evaporation of brine and precipitation of salt minerals dominated, which obeyed the regularity indicated by the phase diagram of the quaternary system Mg-Na-K/Cl~-H_2O. In the dilution stages, however, mixing of brines, dissolution of salts(especially the playa) and mechanical clastic deposition played the leading role. The prerequisite for mixing in the Qarhan salt deposit lies in that chloride type brine of the northeastern part coexists with magnesium sulfate type brine of the southwestern part in the same salt lake. The appearance of bassanite has verified the process of mixing. The dissolution refers to the partial dissolution of the salt beds originally deposited. Particularly in the last dilution process, approximately 200 km~2 of the playa north of the Tuanjie Lake had been dissolved before a new-born lake took form.Solid potash salts were formed in three ways:(1) The surficial brine of the Dabuxun lake coexistent with the playa had an intercompensational relationship with the intercrystalline brine in the playa. As a result, K~+ ions were collected into the lake, and layered Carnallite precipitated from lake brine during the seasons of evaporation, which was accelerated by the action of wind.(2) Disseminated potash-magnesium salts were formed by further concentration of intercrystalline brine.(3) Dissolution and reformation of the playa resultedin the formation of a new-born salt lake, in the drying of which brine collected the potash-magnesium salts originally dispersed over the playa into local low-lying areas, forming finally stratoid potash-magnesium salts. 相似文献
7.
Geological characteristics and genesis of subbottom pinnoite deposit of Da Qaidam salt lake in Qaidam Basin 总被引：1，自引：0，他引：1
GAO Chunliang YU Junqing MIN Xiuyun CHENG Aiying ZHANG Lis HE Xianhu XIN Shouzhen HONG Rongchang 《《地质学报》英文版》2014,88(Z1):7-7
正Da Qaidam salt lake is known for its both liquid and solid boron resource.Data from previous investigation of the Da Qaidam salt lake provided a comparable framework for this study that focused on investigating the section beneath the bottom of the perennial salt lake,including the timing, 相似文献
8.
Trend of Salt Lake Changes in the Background of Global Warming and Tactics for Adaptation to the Changes 总被引：5，自引：0，他引：5
ZHENG Mianping QI Wen JIANG Xianfeng ZHAO Yuanyi LI Minghui Open Laboratory of Saline Lake Resources Environment Chinese Academy ofGeological Sciences Beijing R & D Center for Saline Lakes Epithermal Deposits Chinese Academy of Geological Sciences Beijing 《《地质学报》英文版》2004,78(3):795-807
Salt lakes are a mirror of climatic changes and provide holographic records of environmental changes of lakes. According to a study of geological hazards in typical salt lake areas in China and other regions, the authors explain how geological hazards in salt lake areas are caused by natural agents and how humans can seek benefits, avoid hazards and reduce losses on the premise that they have monitored and mastered the trend of salt lake changes in advance and even can store flood and recharge water in lakes and extract saline resources. The climate 相似文献
9.
正Salt Lake brine pump is one of the key equipment in salt lake brine extraction device.As the salt lake brine is a kind of high concentration solution with a variety of chemical constituents,the flow and agitation of saturated 相似文献
10.
正1 Introduction Dogai Coring is a name of lake lied in the northern Tibet.There are a series of modern salt springs and theies travertines.All of salt springs have an anomaly of potassium,implying that springs water may dissolve evaporites from deep bed formation,which includes halite 相似文献
11.
Heavy water eoutcnts were determined for brines from Some salt lakes, and for water samples from rivers, springs and oil field by temperature-float method. Because the salt lakes studied are situated in cold, arid region of high altitude, the heavy water content in concentrated brines is much higher than that in rivers and springs due to vigorons evaporation, with a maximum value of 5.9 γ higher than that in running water of Peking. Discussion is also given to the dependence of heavy water variation upon season, depth of lake water, density, the degree of brine metamorphism,and crystallization of minerals containing crystalline water. 相似文献
12.
正1 Introduction A salt lake is a naturally occurring complex body of water and salt interaction.More than 700 salt lakes are widely distributed in the area of the Qinghai-Tibet Plateau.Most of the salt lakes are famous for their abundance of lithium,potassium,magnesium,and boron resources.It is 相似文献
13.
正1 Introduction China is a country which has many salt lakes.Tibet is the area where have numerous salt lake,because the sources of water have multiple chemical type,resulting in Tibet salt 相似文献
14.
Wei Xinjun Jiang Jixue Qinghai Research Institute of Salt Lake Exploration Exploitation Golmu Q inghai 《《地质学报》英文版》1994,68(1):71-82
The paper discusses the distribution of Quaternary sediments, occurrence of saline minerals and phases of neotectonic movements and their manifestations in the Qaidam basin. The formation of four successive lacustrine terraces in Tertiary anticlinal zones in the western part of the basin was related to the neotectonic movements that took place 100 Ka ago, and the distribution of such terraces discloses, in a way. the evolutionary history of the Quaternary salt lakes. According to the distribution of the terraces coupled with the distribution of Quaternary sediments and features of salt deposition, four periods of Quaternary salt lake evolution in the basin may be distinguished, which correspond to four stages of salt deposition respectively. 相似文献
15.
正1 Introduction The main production of Yabulai salt lake was original salt and recycled salt many years ago.After decade’s production,the sale lake resource is more and more deficient.Glauber's salt and magnesium salt are concentrated in brine now.It could affect the quality of the salt.In recent years,research had done much work to 相似文献
16.
Discovery of Borax-bearing Mirabilite Beds in Dong Co, Northern Tibet, and Its Palaeoclimatic Significance 总被引：3，自引：0，他引：3
WEI Lejun ZHENG Mianping LIU Xifang CAI Keqin NIE Zhen Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing China University of Geosciences Beijing Open Laboratory of Saline Lake Resources & Environment Chinese Academy of Geological Sciences Beijing Fei Zhenbi 《《地质学报》英文版》2002,76(3):271-282
The authors investigated lacustrine chemical sediments on terrace-I of Dong Co-a salt lake in the interior of the northern Tibetan Plateau and firstly discovered borax and a complete sedimentary section with five pure mirabilite beds. According to the sedimentary characteristics of rhythmic layering, palaeotemperatures for the formation of the cold-phase mineral-mirabilite-at the profiles and 14C dating, the authors applied the theory and method of comparative salinology in the study of the history of the palaeoclimate and palaeoenvironment of Dong Co in the early and middle Holocene and drew the conclusion that the salt lake had experienced the following climatic evolution: the warm and moist stage (>8470 a BP and possibly to 10500 a BP)→cold and dry stage (8470-8170 a BP)→warm and moist stage (8170-7590 a BP)→stage of repeated climatic oscillations (7590-7400 a BP, alternation of three dry oscillations and three moist oscillations in a generally cold climatic background)→cold and dry stage (7400-6 相似文献
17.
正1 Introduction Yuncheng Salt Lake is an old lake with a history of more than 5000 years,which locates in the margins of the central plains of China,with an area of about 130 km.It was an important resource of salt for human consumption from early times.Major chemicals in Yuncheng Salt Lake contain Na Cl,Na2SO4 and Mg SO4(Gao et al.2007).In recent years,some halophilic bacteria and archaea were 相似文献
18.
In the geological evolution of the Tarim Basin, many transgressions and relictions happened. So there have been plentiful sources of salt. Moreover, because of uttermost drought, a lot of salt has been deposited. It is possible to find potash salt in this area. In our fieldwork, we have found salt and brine in western Tarim Basin. Based on a geological survey and the characteristics of sedimentary facies and paleogeography, this paper deals with the geochemical parameters and discusses the possibility of formation of potash salt in terms of the chemical analyses of samples collected from western Tarim Basin. Results of brine analysis lead to some conclusions: most of these salt brines have eluviated from very thick halite beds, mainly chloridetype salt and this kind of halite does not reach the stage of potash deposition in all aspects; WKSL (Wukeshalu) occupies a noticeable place, and we should attach importance to this district because there have been some indicators of the occurrence of potash deposits as viewed from the contents of Br and K. Finally, low Br contents are recognized in the Tarim Basin as a result of salt aggradation, and this point of view has been proved by the results of this experiment and the data available. It cannot depend upon the index of Br to judge the evolution stage of halite. We must look for other facies of potash except marine facies. 相似文献
19.
CHEN Yong WANG Jiuyuan ZHOU Zhenzhu CHEN Xiaolan ZHAO Zhenyu SHI Peng HAN Yun 《《地质学报》英文版》2021,95(3):1008-1015
Trapped ancient microorganisms in halite fluid inclusions are of special interest to the understanding of biology and ecology in salt lake systems.With the integration of petrologic,microthermometric,and Raman spectroscopic analyses,this study utilizes fluid inclusions from Chaka Salt Lake,eastern Qaidam Basin,NW China,to assess the possibility of microorganism-trapping by fluid inclusions.Here,we report that the solid phase of some primary fluid inclusions contains carotenoids,which is interpreted as evidence of Dunaliella algae,and that the coexisting liquid phase comprises SO_4~(2-).The homogenization temperatures of single-phase primary fluid inclusions indicate that the precipitation temperature of the Holocene halite in Chaka Salt Lake ranges from 13.5°C to 36.4°C.This suggests that fluid inclusions in halite are a good medium for trapping and preserving ancient microorganisms and organic matter in salt lakes,and that Raman spectroscopy has good potential to identify halophilic archaea. 相似文献
20.
ZHANG Chengjun ZHENG Mianping Alexander PROKOPENKO Steffen MISCHKE GOU Xiaohui YANG Qili ZHANG Wanyi FENG Zhaodong 《《地质学报》英文版》2009,83(6):1101-1115
Abstract: The Early Holocene paleoclimate in Bosten Lake on the northern margin of the Tarim Basin, southern Xinjiang, is reconstructed through an analysis of a 953 cm long core (BSTC2000) taken from Bosten Lake. Multiple proxies of this core, including the mineral components of carbonate, carbonate content, stable isotopic compositions of carbonate, Ca/Sr, TOC and C/N and C/S of organic matter, are used to reconstruct the climatic change since 8500 a B.P. The chronology model is made by nine AMS 14C ages of leaves, seeds and organic matter contained in two parallel cores. The climate was cold and wet during 8500 to 8100 a B.P. Temperature increased from 8100 to 6400 a B.P., the climate was warm and humid, and the lake expanded. The lake level was highest during this stage. Then from 6400 to 5100 a B.P., the climate became cold and the lake level decreased slightly. During the late mid-Holocene, the climate was hot and dry from 5100 to 3100 a B.P., but there was a short cold period during 4400 to 3800 a B.P. At this temporal interval, a mass of ice and snow melting water supplied the lake at the early time and made the lake level rise. The second highest lake level stage occurred during 5200 to 3800 a B.P. The climate was cool and wet during 3100 to 2200 a B.P., when the lake expanded with decreasing evaporation. The lake had the last short-term high level during 3100 to 2800 a B.P. After this short high lake level period, the lake shrank because of the long-term lower temperature and reduced water supply. From 2200 to 1200 a B.P., the climate was hot and dry, and the lake shrank greatly. Although the temperature decreased somewhat from 1200 a B.P. to the present, the climate was warm and dry. The lake level began to rise a little again, but it did not reach the river bed altitude of the Konqi River, an outflow river of the Bosten Lake. 相似文献