AWI-1 SBO-1, PRI-1, AND DWA-1, Belgian Sedimentary Rock Reference Materials     

I. ROELANDTS  J.C. DUCHESNE 《Geostandards and Geoanalytical Research》1988,12(1):13-38

A series of five Belgian sedimentary rock reference samples (shale AWI-1, schist SBO-1, psammite PRI-1, limestone CCH-1 and dolomite DWA-1) have been prepared for collaborative studies on their chemical composition. Tables of results compiled from 18 laboratories are presented for about 60 major, minor and trace elements. These data are summarized into means, associated standard deviations, medians and ranges. The values received from the participating laboratories are also listed.
Cinq échantillons de roches sédimentaires belges (argilite AWI-1, schiste SBO-1, psammite PRI-1, calcaire CCH-1 et dolomie DWA-1) ont été préparés comme étalons géochimiques. Des valeurs provisoires sont proposés pour 60 éléments majeurs, mineurs et en traces basées sur les données analytiques de 18 laboratoires ayant participé' cette étude coopérative. Les résultats communiqués sont intégralement présentés. Les laboratoires intéressés sont invités à contribuer aux données analytiques sur ces étalons.  相似文献   

1988 Compilation of Elemental Concentration Data for CCRMP Soils SO-1 to SO-4     

Ernest S. GLADNEY  Iwan ROELANDTS 《Geostandards and Geoanalytical Research》1989,13(2):217-268

Concentration data on 74 individual constituents in CCRMP (Canadian Certified Reference Materials Project) soils SO-1, SO-2, SO-3, and SO-4 have been collected from 83 journal articles and technical reports. These data are summarized in consensus (mean) values with uncertainties expressed as one standard deviation. Mean values are also calculated as a function of analytical procedure and all raw data are given in the tables. Recommended values are proposed based upon data criteria used by NIST (National Institute of Standards and Technology, formerly the National Bureau of Standards or NBS).  相似文献   

DETERMINATION OF NINE RARE EARTH ELEMENTS IN EIGHT USGS REFERENCE SAMPLES AND IN THE ANRT GLAUCONITE, GL-O, BY SEQUENTIAL INDUCTIVELY COUPLED ARGON PLASMA SPECTROMETRY     

Iwan Roelandts 《Geostandards and Geoanalytical Research》1987,11(1):49-74

Nine rare earth elements have been determined by inductively coupled plasma spectrometry (ICP) in eight USGS reference samples, MAG-1, SCo-1, SDC-1, BIR-1, DNC-1, W-2, BCR-1 and BHVO-1 and in the ANRT Glauconite, GL-O. Along with these new data, updated compilations are presented for these samples. Good agreement is observed between the present work and the compiled values.  相似文献   

Distribution of NBS, USGS and CCRMP Reference Material Data in the Literature (1951-1985)     

Ernest S. GLADNEY  Iwan ROELANDTS 《Geostandards and Geoanalytical Research》1987,11(2):133-142

Publication patterns of NBS, USGS and CCRMP reference materials data are traced over the past 35 years by literature source, analytical methods employed, and constituents measured.  相似文献   

What it takes to make a planet     

Iwan Williams  Prof.  Jocelyn Bell 《Astronomy& Geophysics》2006,47(5):5.16-5.17

What lay behind the decision to reclassify Pluto as a "dwarf planet" at August's IAU General Assembly in Prague?  相似文献   

Preface     

Julio A. Fernández  Allan W. Harris  Iwan P. Williams 《Earth, Moon, and Planets》2005,97(3-4):177-99

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The outburst of the κ Cygnids in 2007: clues about the catastrophic break up of a comet to produce an Earth-crossing meteoroid stream     

Josep M. Trigo-Rodriguez  José M. Madiedo  Iwan P. Williams  Alberto J. Castro-Tirado 《Monthly notices of the Royal Astronomical Society》2009,392(1):367-375

Using high-resolution, low-scan-rate, all-sky CCD cameras and high-level CCD video cameras, the SPanish Meteor and fireball Network (SPMN) recorded the 2007 κ Cygnid fireball outburst from several observing stations. Here, accurate trajectory, radiant and orbital data obtained for the κ Cygnid meteor are presented. The typical astrometric uncertainty is 1–2 arcmin, while velocity determination errors are of the order of 0.3–0.6 km s⁻¹, though this depends on the distance of each event to the station and its particular viewing geometry. The observed orbital differences among 1993 and 2007 outbursts support the hypothesis that the formation of this meteoroid stream is a consequence of the fragmentation of a comet nucleus. Such disruptive process proceed as a cascade, where the break up of the progenitor body leads to produce small remnants, some fully disintegrate into different clumps of particles and other remaining as dormant objects such as 2008ED69, 2001MG1 and 2004LA12 which are now observed as near-Earth asteroids. In addition to the orbital data, we present a unique spectrum of a bright  κ  Cygnid fireball revealing that the main rocky components have chondritic abundances, and estimations of the tensile strength of those fireballs that exhibited a catastrophic disruption behaviour. All this evidence of the structure and composition of the κ Cygnid meteoroids is consistent with being composed by fine-grained materials typically released from comets.  相似文献   

B. R. Moss: Ecology of freshwaters—a view for the twenty-first century (4th edn.)     

Iwan Jones 《Journal of Paleolimnology》2012,47(1):163-164

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Information on the international strong motion array council     

W. D. Iwan 《地震工程与结构动力学》1990,19(6):925-925

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Compilation Report (1966–1987) on Trace Elements in five CRPG Geochemical Reference Samples: Basalt BR; Granites, GA and GH; Micas, Biotite Mica-Fe and Phlogopite Mica-Mg     

K. GOVINDARAJU  I. ROELANDTS 《Geostandards and Geoanalytical Research》1988,12(1):119-201

The five CRPG geochemical reference samples (BR, GA, GH, Mica-Fe and Mica-Mg) have been distributed as reference samples for more than twenty years. All data on trace elements in these samples available to the authors since their first reports have been compiled and evaluated. It has been possible to assign working values for more than forty elements in BR, GA, GH and Mica-Fe and for twenty-three elements in Mica-Mg. The samples are expected to last for another twenty years.  相似文献