Is there a Need for Sedimentary Rock Reference Samples ?

Six sedimentary rook types are proposed as geochemical standards: an arkosic sandstone, a quartzitic sandstone, a shale, a marl, a dolomitic limestone and an evaporite. Localities where these might be obtained are given, and alternative suggestions invited.     

Geoscientific Significance and Classification of NationalGeoparks of China

The conservation of geological remains in China, especially in renowned sites with historical or cultural significance, has long been paid attention to. As the urban residents become more interested in returning to and harmony with the nature, tourism related sciences and knowledge gets more attractive. Geosites and geoparks can definitely play an important role to lead this historic tendency.     

澳大利亚塔斯马尼亚地学数据属性描述与GIS空间数据库的集成管理

地学数据种类极为繁多,它既包括定量信息,也包括定性信息。数字地质信息结构的研制工作所面临的困难是以何种方式保存现有的模拟数据的重要内容,使得在ＧＩＳ中能够进行各种有效的查询和处理。澳大利亚斯马尼亚地调局为了对地质图信息和地球化学进行编码而研制了数据结构。在地质和地球化学数据结构中对于一系列相关表格中的属性进行编码,而这些表格利用“一对多”和“多对多”的关系有效而准确地阐明了原始数据之间的相互关系。     

Boron Contents in Selected International Geochemical Reference Samples

Boron concentrations have been measured in fifteen geochemical reference materials using prompt gamma neutron activation analysis. Replicate analyses of these samples provide an indication of the precision of the method under "normal'analytical conditions over an extended period of time.
La teneur en bore a été dosée dans quinze échantillons géochimiques de référence par l'activation neutronique avec "prompt gamma". L'analyse répétée de ces échantillons démontre, en général, une bonne précision de la méthode en analyse de routine.     

Fluorine in Twenty-Two International Reference Rock Samples and a Compilation of Fluorine Values for the USGS Reference Samples

Fluorine in 22 international reference samples has been determined with an ion selective electrode following fusion with a Na₂bCO₃-ZnO mixture. To eliminate the effect of fluorine complexes in the solutions, the results presented are means of fluoride determinations from a standard calibration curve and from the method of standard addition. Together with these new determinations an updated compilation of USGS-I reference samples is presented.     

《中国地质》地质科学数据专辑征稿启事

《地质科学数据》是由自然资源部主管、全国地质资料馆主办的地质学数据期刊。该刊以“促进科学数据资源共享,推进数据知识产权保护,引领中国地质数据国际化”为办刊宗旨。《地质科学数据》每期出版的数据论文关联的实体数据均在“地质科学数据出版中心”(geodb.cgs.gov.cn)出版,并采取“开放获取”(Open access)运行机制。     

Contribution to Evaluation of Analytical Data On Reference Samples

For evaluating the analytical data on reference samples, the following approach is proposed: 1. Analytical methods used are critically reviewed. 2. Outliers are eliminated. 3. Normality of the results is tested. 4. If normality of the results can be accepted, arithmetic mean, its confidence interval and coefficient of the precision are computed. 5. If the results are not normally distributed, median and its statistical characteristics are given. 6. For sets of data with anomalous skewness, logarithmic and lambda transformations are useful approaches.     

Determination of Traces of Rare-Earth elements, Yttrium and Thorium in Several International Geological Reference Samples and Comparison Of Data with Other Published Values

Experimental results for most rare-earth elements, yttrium and thorium in several international geological reference samples are presented and compared with other published values, where available. The analytical method used to obtain these results involved a preliminary concentration of the rare-earths On milligram quantities of iron as carrier for atomic-absorption, flame-emission and spectrophotometric determinations, or on milligram quantities of Fe₂O₃, Al₂O₃ and SiO₂ as carriers for optical-emission spectrometric determination.     

Determination of Fluorine and Total Water in Thirty-Three International Geochemical Reference Samples

Thirty-three reference samples from the United States Geological Survey (USGS), Centre de Recherches Pétrographiques et Géochimiques (CRPG, France), Association Rationale de la Recherche Technique (ANRT, France), National Institute for Metallurgy (NIM, South Africa), Geotechnic Institute (GI, Austria), Mineralogical Institute of Basel and Bern (Switzerland), Zentrales Geolo-gisahes Institut (ZG1, DDR) and from the For-chungeinstitut der Zementinduatrie (Düsseldorf, GDF) were analysed for their fluorine and total water content. Fluorine was determined, after pyrohydrolysis, with an ion-selective electrode. Total water was determined, after pyrolysis, by Karl-Fischer titration. Our values, five determinations on each sample, are compared with the preferred values.     

Instrumental Neutron Activation Analysis of Twenty-Nine International Geochemical Reference Samples

Results of measurements of twenty-seven elements, most of them in trace amounts, by Instrumental Neutron Activation Analysis (INAA) in twenty-nine international geochemical reference samples from Canada, U.S.A., Japan, France and South Africa, are reported and compared with available literature values. In general, our data agree well with literature values. The disagreement of our results (e.g., Zr in Canadian syenites and several trace elements in USGS ultrabasic rocks) with those reported by other workers is briefly discussed and ways of improving INAA are pointed out. The present report includes data on several trace elements for which existing data are rather scarce.     

中国地质科学院对5.12汶川地震的快速反应与调查研究

面对5.12汶川8级地震突发灾害,中国地质科学院组织专家,科学分析发震动力学背景,第一时间奔赴震中地区开展地表破裂变形与地震地质灾害调查,随后系统开展地震科学钻探选址、活动断裂与地震变形观测、地应力测量、地质灾害地面调查、堰塞湖与水工环综合评价。6位专家参加国家汶川地震专家委员会,编辑出版《汶川地震灾区地震—地质灾害图集》,组织召开汶川地震动力学分析研讨会,2位专家参加国土资源部抗震救灾前方指挥部工作。在第33届国际地质大会期间,组织汶川地震大型展览,应邀作汶川地震、地震科学钻、地表破裂等学术报告,受到国际同行的高度关注。组织申报汶川地震断裂带科学钻探工程,2008年11月第一口地震科学钻开工;组织落实国家专项、973课题、地质调查项目等科研任务,有效地调整了面向地质灾害的学科结构和人才布局。     

XRF Determination of 19 Trace Elements In International Geochemical Reference Samples

Routine XRF determination of 19 trace elements in 23 international standards using the method of Leake et al is examined. Agreement of results for 15 well-established international reference samples is generally good, showing that this method gives comparable results to other techniques. New trace element data using this method are presented for the 8 USGS III standards.     

Candoluminescence Emission Analysis of Cerium in Thirty-Six International Geochemical Reference Samples

Cerium has been determined in thirty-six international geochemical reference samples using candoluminescence emission analysis. Samples are fused with sodium peroxide in nickel crucibles and interfering elements are removed by an ion exchange technique.
Cerium values obtained in the present work generally lie within ranges reported in the literature or close to the upper or lower ends of these ranges. Candoluminescence values for cerium compare favourably with previously reported INAA values for most of the geochemical reference samples analysed in the present study.     

固体化学盐样检测数据的质量控制

固体化学盐样作为我国西部地区特有的矿产资源,目前缺乏盐湖样品分析相应的国家标准,在分析固体化学盐样的实验室对该类样品的分析方法没有统一规范,因此对固体化学盐样监测数据的合理性检验显得尤为重要。文章结合《地质矿产实验室测试质量管理规范》(DZ/T 0130—2006),介绍了氯化物及硫酸盐型固体化学盐样检测数据的质量控制及判断方法,包括在样品加工过程中掌握矿区的盐样类型,提供水分的检测数据;将盐样分析数据的离子质量分数换算为化合物质量分数时,要正确把握各种化合物的换算顺序和原则;利用阴阳离子平衡原理初步判断样品分析质量;充分了解样品的分析结果,根据配盐后各化合物的物理性质,通过分析元素加和判断样品分析质量;通过离子间的关系、加标回收和重复性实验、不同分析方法比对来判断样品分析质量。简要提出了氯化钠、氯化钾、高纯氯化镁、高纯氯化锂等特殊固体盐样的质量控制方法,以保证固体盐样实验室分析数据的准确性和可靠性。     

Two Reference Samples for Assessing Analytical Data Reliability in Geochemical Investigations

The planned procedure for developing two reference samples, coal ash from the Kansk-Achinsk basin, ZUK-1, and silt from Lake Baikal, BIL-1, is described.     

勘探煤芯样化验数据异常分析

由于成煤原始植物不同,成煤古地理环境各异以及地质造构运动等方面的影响,在特殊条件下,煤质化验数据会表现出异常的情况,通过数据审查,发现异常数据加以分析,对提高煤质报告的编制水平是十分必要的。     

地球化学样品分析质量管理系统

利用VFP6．0强大的数据计算和管理功能,设计了对地质调查样品分析数据的实验室质量管理系统。该系统不仅可以同时管理多个图幅样品的数据,还可以自动实现样品编码、内检样品按指定比例随机生成、一级和二级标样质量汇总、内检合格率和报出率计算、二级标样质量监控图绘制以及按选定格式进行分析数据和内检数据的导入和导出,可以根据用户的需要输出美观的表格。该系统适用于不同比例尺化探数据的实验室质量管理。     

Geometric Means as Probable Values For Compiled Data on Geochemical Reference Samples

Trace element data compiled on, geoshemical reference samples present invariably skewed distributions. It is proposed to treat such data as lognormally distributed and to compute geometric means (X_gm) as probable values. As examples, the X_gm values derived for some trace elements in some rock reference samples are compared with the "recommended" values and with the "gamma" values of Christie.     

Determination of Carbonate Carbon in 41 International Geochemical Reference Samples by Coulometric Method

The carbonate-carbon (CO₂) content of forty-one geochemical reference samples has been determined by coulometric method following acid treatment of the sample for releasing CO₂. The method is superior to the conventional methods in speed, accuracy, sensitivity, specificity, and the coverage of CO₂ range. The results on NBS limestone samples agree well with the certified values. The precision of the method is 0.5 % r.s.d., and the practical detection limit is 10 ppm C.