电感耦合等离子体原子发射光谱法测定高纯氧化钇中稀土杂质元素

拟定了电感耦合等离子体原子发射光谱法测定高纯氧化钇中１４个稀土杂质的方法,选择了仪器的最佳工作条件,考察了基体效应的影响,在选定条件下,１４个稀土元素的检出限为（０．０６～１．１０）μｇ／ｇ,相对标准偏差（ｎ≥１０）为０．９８％～９．３％,加标回收率为９３％～１１４％。方法不经预分离富集处理,在大量基体中成功地测定了含量在μｇ／ｇ级的稀土杂质元素。     

异烷基磷酸（1—甲基—庚基）酯萃淋树脂分离感耦等离子体光谱法测定…

用５７０９萃取树脂还原色层法分离富集高纯氧化铕中微量稀土杂质，随后用顺序扫描等离子体光电光谱法测定。色层分离的条件：上柱稀土基体的质量浓度为２０ｇ／Ｌ，ｐＨ２－３，流速为２．５ｍＬ／ｍｉｎ，洗脱液为６ｍｏｌ／Ｌ的ＨＣｌ溶液。共测定铈，镨，钕钐，钆和镝６种稀土杂质。     

异烷基磷酸（1甲基庚基）酯萃淋树脂分离感耦等离子体光谱法测定氧化铕中微量稀土元素

用５７０９萃淋树脂还原色层法分离富集高纯氧化铕中微量稀土杂质，随后用顺序扫描等离子体光电光谱法测定。色层分离的条件：上柱稀土基体的质量浓度为２０ｇ／Ｌ，ｐＨ２～３，流速为２５ｍＬ／ｍｉｎ，洗脱液为６ｍｏｌ／Ｌ的ＨＣｌ溶液。共测定铈、镨、钕、钐、钆和镝６种稀土杂质。回收率为８９％～１０５％，相对标准偏差≤４％。方法可用于荧光级氧化铕中杂质稀土的测定     

感耦等离子体发射光谱法测定纯氧化镧中稀土和非稀土杂质

研究了用感耦等离子体发射光谱（ＩＣＰ－ＡＥＳ）测定纯氧化镧中Ｃｅ，Ｐｒ，Ｎｄ，Ｓｍ，Ｙ，Ｆｅ，Ａｌ，Ｃａ，Ｍｇ和Ｓｉ１０个杂质元素的方法。考察了基体镧的光谱干扰，共存元素间光谱干扰及校正方法，方法检出限为０．０００５－０．０３９μｇ／ｍｌ；标准加入量１μｇ／ｍｌ时，回收率为９５％－１０６％；１０μｇ／ｍｌ的标准溶液，测定１０次，ＲＳＤ为０．２４％－１．０１％。方法简单，快速，不震分离富集，适用于氧     

直流等离子体原子发射光谱在纯钕中稀土杂质分析的应用

应用直流等离子体中阶梯光栅直读光谱仪进行纯钕中１４个稀土杂质元素的分析,选定了干扰小、检出限低的最佳分析线,对干扰的来源和性质作了研究,从而拟定了纯钕中稀土杂质元素的分析方法。该方法的检出限在３～８１μｇ／Ｌ,ＲＳＤ（ｎ＝１１）在１％～３．６％,加标回收率为９２％～１０８％。方法已用于纯金属钕和氧化钕中杂质稀土的分析。     

萃取—原子吸收法测定高纯氧化钐中的镍

在ｐＨ３的弱酸性介质中，用二乙基二硫代氨基甲酸钠＿甲基异丁基酮萃取分离氧化钐以消除基体干扰，用４ｍｏｌ／ＬＨＮＯ３溶液反萃取后火焰原子吸收测定被富集的杂质镍。萃取时水相与有机相体积比为５∶１，反萃时体积比为１∶１，萃取时间５ｍｉｎ，测定高纯氧化钐中杂质镍的回收率达９８％。分离后的共存非稀土元素对测定镍无干扰。方法检出限为４０μｇ／ＬＮｉ，对ｗ（Ｎｉ）＝０３×１０－６的氧化钐测定６次，ＲＳＤ＝７１％，试样加标回收率在９３％～１０４％。     

微分溶出计时电位法测定地质物料中微量铜

在０．２ｍｏｌ／Ｌ ＨＣｌ－１．０ｍｏｌ／ＬＮａＣｌ－０．１５ｍｏｌ／Ｌ抗坏血酸介质中，用电流氧化微分溶出计时电位法直接测定地质物料中微量Ｃｕ。富集电位－０．５５Ｖ，时间２０～４０ｓ；电极转速２５００ｒ／ｍｉｎ；溶出电流０．２～１μＡ；记录电位范围－０．２～－１．２０Ｖ；清洗电位－０．１０Ｖ，时间１０ｓ。方法检出限０．２μｇ／ｇ，线性范围２～４００ｎｇ／ｍｌ，精密度（ＲＳＤ，ｎ＝１１，４．１μｇ／     

青藏高原五道梁冻土活动层表面二氧化碳和甲烷的排放

通过静态箱取样方法，首次获得青藏高原冻土活动层排放气体。分析测定结果表明，ＣＨ４含量为０．６３～１．５４μｇ／ｇ，平均为１．１９μｇ／ｇ，大多数样品ＣＨ４含量低于当地大气ＣＨ４含量（１．３２μｇ／ｇ）；ＣＯ２含量为０．１５％～０．２７％，平均为０．２１％，明显高于大气ＣＯ２的浓度（０．０６９％）。ＣＨ４、ＣＯ２含量具有一定的日变化特征。ＣＨ４排放率为－０．０３２～０．０４８ｍｇｍ－２ｈ－１，平均为０．００１ｍｇｍ－２ｈ－１；ＣＯ２排放率为－５６．５０３～６１．４２５ｍｇｍ－２ｈ－１，平均为０．０９５ｍｇｍ－２ｈ１。从所获得的冻土排放气体中ＣＨ４和ＣＯ２的浓度来看，这种干燥寒冷的高原冻土活动层表面ＣＨ４排放较少，ＣＯ２的排放较高     

勘查地球化学找矿中重要指示元素的野外快速分析法（二）银的分析方法

发展了一种可在野外快速测定０．０１０—５０μｇ／ｇ银量的新方法。此法由两个各自独立而又配套的部分组成。一是直接测定０．２５—５０μｇ／ｇ银量的Ａｇ－ＴＭＫ－ＳＤＳ三元络合物光导比色测定法；二是测定０．０１０—０．２５μｇ／ｇ银量的巯基棉分离富集微珠析出比色法。可在同一份试液中依次完成。前者检出限为０．００６μｇ／ｍｌ（Ｋ＝３）；测定铜、铅和锌矿石标样ＧＳＯ－Ｃｕ－１（含银３．８７μｇ／ｇ）、ＧＳＯ－Ｐｈ－１（含银１４．７μｇ／ｇ）和ＧＳＯ－Ｚｎ－１（含银１３．５μｇ／ｇ）中的银，ＲＤＳ（ｎ＝１１）分别为１．６％、３．７％和３．４％；后法可检出５ｎｇ／ｇ银；测定地球化学标样ＧＳＤ－３（含银０．５９μｇ／ｇ）中的银，ＲＳＤ（ｎ＝１１）为６．ｔ％。方法较为简便、快速、准确和灵敏。用光导比色计测定，结果准确度、精度均有较大改善，且与室内原子吸收法相当。故所定方法具有广阔的应用前景。     

色层分离－端视电感耦合等离子体发射光谱法测定高纯氧化铕中稀土杂质元素

对Ｐ５０７萃淋树脂分离稀土元素的条件进行了实验，拟定了以Ｐ５０７萃淋树脂为固定相，ＨＣｌ为流动相分离４Ｎ级荧光材料Ｅｕ＿２Ｏ＿３中１４种稀土杂质元素的流程，使被测杂质与基体Ｅｕ＿２Ｏ＿３达到了较好的分离；再用阳离子交换树脂分离被测液中非稀土杂质元素。选择了端视ＩＣＰ－ＡＥＳ测量稀土杂质元素的最佳条件。称样量５０ｍｇ时各杂质组分的测定下限（ｕｇ／ｇ）为：ＣｅＯ＿２、Ｐｒ＿６Ｏ＿（１１）、Ｎｄ＿２Ｏ＿３、Ｓｍ＿２Ｏ＿３、Ｔｂ＿４Ｏ＿７、Ｈｏ＿２Ｏ＿３、Ｅｒ＿２Ｏ＿３，Ｔｍ＿２Ｏ＿３、Ｌｕ＿２Ｏ＿３０．４，Ｌａ＿２Ｏ＿３、Ｇｄ＿２Ｏ＿３、０．２，Ｄｙ＿２Ｏ＿３、Ｙ＿２Ｏ＿３０．０４，Ｙｂ＿２Ｏ＿３０．０２。６次取样分析，各杂质组分加入量为１０ｕｇ／ｇ（ＣｅＯ＿２为２ｕｇ／ｇ），加入回收率在８４％～１１２％；ＲＳＤ＜１３％。方法可用于纯度在９９．９９％～９９．９９９５％Ｅｕ＿２Ｏ＿３中１４种稀土杂质元素的测定。     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

General contents of JOURNAL OF PALAEOGEOGRAPHY,2014

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Clay Mineralogical and Geochemical Studies of Detrital Rocks of the Upper Cretaceous Salt-bearing Strata,Simao Basin,SW China:Implication for Provenance and Source Weathering

正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and     

Status of China’s Mineral Resources in 2013

正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the     

Thermodynamics of the Calcium-Containing Brine Systems

正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet     

Mechanism of Salt Migration Driven by Tectonic Processes:Insights from Physical and Numerical Modeling

正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt     

Palynological Assemblage Age and Palaeoenvironment of the Cretaceous Salt-bearing Strata in Laos and Yunnan,China

正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash     

Geological Characteristics of Potassium-Bearing Salt Layers in the Well Block Quele of the Kuqa Depression and their Significance

正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b),     

Integration of Resources and Technological Advantages,Creation sustainable Qinghai Potash Fertilizer Industry Base

正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline