Determination of an internal 87Rb87Sr isochron for the Olivenza chondrite

作者: H.G. Sanz , G.J. Wasserburg

DOI: 10.1016/0012-821X(69)90182-4

关键词: RubidiumIsochronChondriteYield (chemistry)GeologyEnvelope (mathematics)DiagramStrontiumChondruleMineralogy

摘要: Abstract RbSr isotopic determinations were made on five single chondrules, ranging from 4 to 27 milligrams, extracted Olivenza, an olivine-hypersthene chondrite. Several density fractions with a particle size smaller than 37μ separated and analyses made. These data form well defined linear array the SrRb evolution diagram yield age of 4.63 × 109 years initial 87 Sr 86 = 0.6994 . The typical strontium rubidium blanks 8 10−10 10−11 g, respectively. An acid wash experiment shows that preferential leaching takes place resulting such procedure are doubtful reliability. Constructing error envelope points, graphical representation versus is presented which demonstrates constraints these two anticorrelated parameters. This useful means testing whether arrays may have same ( ) I

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