柴北缘牦牛山地区牦牛山组沉积相组合特征

柴达木盆地北缘牦牛山地区出露的牦牛山组是一套由冲积扇和扇三角洲相共同构成的陆相沉积组合,冲积扇相砾岩-粗砂岩组合主要分布于研究区SE侧,扇三角洲相砂岩-泥岩组合主要分布于研究区NW侧。古水流分析表明牦牛山组沉积物主要来自其SE侧古隆起,但后期扇三角洲相包含少量来自NW和NE向的沉积物。该套沉积组合序列特征与区域上分布在牦牛山西侧同时期形成的湖泊相、滨浅海相沉积共同表明,柴达木盆地北缘在晚志留-早泥盆世时期存在一NW向倾斜的古斜坡,且晚期北侧发生抬升。砾岩和砂岩碎屑组成与区域岩石组合类型对比表明,牦牛山组沉积碎屑物主要来自于滩间山群。沉积组合序列特征、碎屑组成和区域构造背景综合研究表明,牦牛山组可能为柴达木板块向北俯冲过程中形成的局部断陷盆地的充填物。     

内蒙古东南部早三叠世花岗岩带岩石地球化学特征及其构造环境

锆石U-Pb定年结果表明位于林西县北西的转山子岩体的形成时代为245.6±0.9Ma,该岩体与内蒙古东南部的龙头山和建设屯岩体共同构成一条大致平行于西拉木伦河蛇绿岩带的早三叠世花岗岩带。岩石学和地球化学分析表明,上述早三叠世岩体属于钙碱性和高钾钙碱性系列,铝饱和指数(ACNK)均小于1.1,属于偏铝质或弱过铝质的I型花岗岩。其中,转山子岩体轻重稀土分馏较弱,含有较低的Sr含量(400×10-6),显示经典岛弧岩石的特征;建设屯岩体具有强烈的轻重稀土分馏以及较高的Sr含量(400×10-6),显示埃达克岩的地球化学特征;龙头山岩体的轻重稀土分馏特征和Sr的含量总体介于前两者之间。锆石Hf同位素分析表明,上述三个岩体都具有正的εHf(t)值。岩石地球化学特征反映它们起源于不同深度的新生下地壳不同程度的部分熔融作用。综合考虑区域地层和岩浆岩资料,本文认为该花岗岩带与区域上同时代的镁铁质火山岩共同形成于西伯利亚和中朝古板块碰撞造山过程中与伸展有关的地球动力学环境,可能与向南俯冲的古亚洲洋板块在早三叠世的断离引起的软流圈上涌有关。     

Lithium Ion Extraction from the High Ration Mg/Li Salt Lake Brine with Ionic Liquid in Triisobutyl Phosphate and Kerosene

正1 Introduction As the lightest metal with the unique properties of energy production and storage,lithium is regarded as the new century energy metal.Lithium and its compounds were widely used in various industrial fields,especially in     

Phase Equilibrium and Phase Diagram of the Ternary System(MgCl_2 + MgB_2O_4 + H_2O) at 288 and 298 K

正1 Introduction The brines with high concentrations of magnesium and boron resources are widely distributed in the Qaidam Basin of the Qinghai-Tibet plateau,China(ZhengTang,1988).Although some works on the ternary system     

Pretreatment Techniques for Arsenic Speciation Analysis in Biosamples

正Introduction Coupled techniques such as HPLC–HG–AAS,HPLC–ICP–MS,HPLC–HG–AFS are widely used for arsenic speciation analysis in biosamples,during which pretreatment method usually plays a significant role.This     

Phase Equilibria of Salt-water Systems Containing Magnesium and Borate Ions

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     

Studies on the Thermodynamics and Thermal Chemistry Properties for Lithium Salts and Their Aqueous Solution Systems

正1 Introduction With the industrial development of lithium battery,nuclear and aerospace industry,the demands of metal lithium and its compounds are increasing significantly.Lithium is called as the energy of the metal in the new century(Zhang et al.2001).The total reserve of lithium resources around the world7     

Experiment and Pitzer Model Prediction for the Solid + Liquid Equilibria of the Ternary System LiCl–CaCl2–H2O

正1 Introduction Lithium resources are widely distributed in the oilfield brine from the Nanyishan district in the Qaidam Basin(Fan et al.,2007).The investigation of the thermodynamics and phase diagram of the brine system is valuable in providing the theoretic foundation and scientific guidance in the comprehensive exploitation of the mixture salts effectively.Comprehensive     

Transformation Process and Mechanism of Lithium Borates

正Amounts of lithium-containing salt lake brine resources are widely distributed in the four provinces named Qinghai,Tibet,Inner Mongolia and Xinjiang province,especially the salt lakes in Qinghai-Tibet Plateau are abundant of     

磁铁矿中微量元素和铂族元素的组成特征

文章分析了磁铁矿中铂族元素(PGE)含量的特征,发现磁铁矿中铂族元素富集为10-9级,主要为PPGE(即Pd,Pt,Rh)。富集PPGE的主要原因是其在热液活动的晚期阶段可以被轻微的再分配和富集,其含量的高低严格受岩浆结晶过程中氧逸度的控制。磁铁矿的结晶程度直接影响岩浆体系的氧逸度,控制了PGE的含量分布,进而影响成矿。