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排序方式: 共有321条查询结果,搜索用时 921 毫秒
141.
正1 Introduction Songxian at East Qinling mountains in China possesses more than 100 million tons potassic syenite with the average K2O content of 13%and the main mineral phase of K-feldspar which is a kind of potential potassium 相似文献
142.
XIE Yuan 《《地质学报》英文版》2014,88(Z1):439-439
正Qaidam Basin in Qinghai Province has rich multiple complex resources with salt lakes as the core.These resources form a special condition for the development of green economy,having rare and particular nature.The 相似文献
143.
正1 Introduction Alkaline lakes are widely distributed in the area of the Qinghai-Tibet Plateau.Most of the salt lakes are famous for their high concentration of lithium,potassium,magnesium,boron(Ma,2000).In recent years,as a new energy material,lithium and its compounds are widely used in the new area,such as aerospace industry,nuclear 相似文献
144.
正1 Introduction Potassium is listed as one of the shortage of mineral resources in china.Geophysical and remote sensing technology plays an important role in prospecting for potash ressources. 相似文献
145.
WANG Xingfu 《《地质学报》英文版》2014,88(Z1):437-437
正This paper briefly introduces resources characteristics and development advantages for Charhan salt lake;and elaborated the technology progress to increase potassium mining scale systematically,the impact of the 相似文献
146.
正1 Introduction The underground brine resources distributing widely in Sichuan Basin,China have drawn worldwide attention due to their unusual element abundance and excellent quality. 相似文献
147.
位于藏滇印支地槽褶皱系南段印支中间地块呵叻高原北部沙空那空盆地东南缘的农波盆地在古新世发生3次沉积旋回,钾盐矿体主要产于第一沉积旋回形成的下岩段膏盐岩层上部,第二、第三沉积旋回沉积成盐时期较短、盐类矿产沉积厚度较薄,未形成工业意义的钾盐矿体,只在局部地段形成了钾盐矿化.龙湖矿区钾盐矿矿石类型主要为钾石盐矿、光卤石矿,钾... 相似文献
148.
149.
陕北盐盆马五6亚期构造分异对成钾区位的控制 总被引:2,自引:0,他引:2
本文以16口钻井资料为基础,通过井震联合标定解释,获取累计5595km二维地震剖面的速度等特征物性参数,利用变速成图方法,初步编制出陕北奥陶纪盐盆主要含钾层段——马家沟组五段六亚段盐系等厚图,并进行相应的构造分异解析。提出在陕北盐盆奥陶系马家沟组五段六亚段沉积期,盆底总体表现为"两坳夹一隆"的构造样式,其中厚度大于150m的成盐凹陷主要有5个。西部盐坳的发现、东二盐凹被进一步分解为东、西2个次级盐洼、以及"两坳夹一隆"构造样式的提出,系本次研究取得的新进展和认识,表明陕北盐盆并非是一个"平底锅",其内部存在多个受同沉积断裂控制的、相对活动的次级盐凹,这些次级盐凹将有利于富钾卤水的汇聚,为可能的大规模海相钾盐成矿提供了足够的可容空间和有利的构造区位。 相似文献
150.
《青岛海洋大学学报(英文版)》2014,(2):311-320
An 8 weeks feeding experiment was conducted to determine the effect of dietary potassium on the growth and physio-logical acclimation of Pacific white shrimp (Litopenaeus vannamei) reared in diluted seawater (salinity 4). Six semi-purified practical diets containing 0.59, 0.96, 1.26, 1.48, 1.74, and 2.17 g potassium K+ per 100 g diet were formulated, respectively. The survival and feed conversion rate did not show significant difference among groups of shrimps given these diets (P〉0.05). The shrimps fed the diets containing 0.96-1.48 g K+ per 100g diet gained the highest weight, specific growth rate, and protein efficiency ratio. Their ammonium-N excretion rate as well as hemolymph concentration of Na+ and C1- were significantly lower than those of the control (P〈0.05), but a reverse trend was observed for their gill Na+/K+-ATPase. Moreover, the shrimps fed with 1.48 g K+ per 100 g diet were the highest in hemolymph urea level, and the phenoloxidase and lysozyme activities were significantly higher than those of the control (P〈0.05). The growth and physiological response of the test shrimps suggested that diet containing 1.48 g K+ per 100 g diet improved the growth of L. vannamei in low-salinity seawater, and enhanced the physiological acclimation of the organism. 相似文献