New ¹⁸⁷Re-¹⁸⁷Os, ⁸⁷Rb-⁸⁷Sr, triple O-isotope isotope, bulk rock highly siderophile- (HSE: Os, Ir, Ru, Pt, Pd, Re), major- and trace-element abundance data are reported for a variety of carbonaceous, ordinary and enstatite chondrite meteorites. In addition, new mineral chemical data are reported for the Chelyabinsk LL5 ordinary chondrite fall for comparison with existing chondrite data and to investigate element sequestration into metal and mineral phases within some chondrites. The focus of the study is to link the variations observed in the HSE abundances and Re-Os isotopes with other isotopic and elemental data to explore the relative roles of sample sizes, terrestrial alteration and parent body processes more fully on chondrite meteorite compositions. Trace element variations in Chelyabinsk silicate, oxide and metal grains highlight the importance of geochemical heterogeneity imparted by mineralogical variations and mode effects, as well as sample size. Using a range of sample powder aliquot sizes, it is possible to show that this becomes significant for the HSE at <0.1 g. Variations in high field strength elements relative abundances (HFSE: Ti, Zr, Nb, Ta, Hf) are also identified within individual aliquots of carbonaceous chondrite Ivuna, emphasizing the importance of complete dissolution of refractory phases. The range of fall and find meteorites examined here demonstrates that terrestrial alteration effects revealed for trace elements (e.g., Ba, U, Sr) do not correlate particularly well with Re/Os variations. Instead, the Re/Os ratios of carbonaceous chondrites are susceptible to disturbance, more so than indicated by incompatible trace element systematics, with the Murchison CM2 carbonaceous chondrite showing significant Re/Os fractionation between sample aliquots. For sample aliquots measured that do not show significant mode or terrestrial alteration effects, parent body processes appear to be largely restricted to thermal metamorphism and dehydration. Including data for this study, the combined published dataset for Re-Os isotope and HSE abundances now extends to 33 ordinary, 39 carbonaceous, 27 enstatite and 6 Rumuruti chondrites. The range in absolute HSE abundances among these meteorite groups is ∼30%, with all chondrites having, within uncertainties, the same average Os, Ir, Ru, Pt and Pd abundances. Notably, carbonaceous chondrites have long-term Re/Os ∼ 8% lower than for the other chondrite groups. If chondrite groups are representative of early planetary feedstocks, then the measured ¹⁸⁷Os/¹⁸⁸Os of ordinary chondrites make them a close match to the composition of the bulk silicate Earth. Assuming ∼0.5% late accretion of ordinary chondrites to Earth, this would result in a long-term Rb/Sr ratio ∼0.6% higher than from late accretion of carbonaceous chondrites, indicating that ordinary chondrites are a potentially attractive source for moderately volatile enrichment.

新¹⁸⁷ Re- ¹⁸⁷ Os, ⁸⁷ Rb- ⁸⁷报告了各种碳质、普通和顽火球粒陨石的 Sr、三重 O 同位素、块状岩石高度亲铁性（HSE：Os、Ir、Ru、Pt、Pd、Re）、主要和微量元素丰度数据. 此外，还报告了车里雅宾斯克 LL5 普通球粒陨石落的新矿物化学数据，以与现有球粒陨石数据进行比较，并研究某些球粒陨石中金属和矿物相中的元素封存。该研究的重点是将在 HSE 丰度和 Re-Os 同位素中观察到的变化与其他同位素和元素数据联系起来，以更全面地探索样本大小、地球变化和母体过程对球粒陨石组成的相对作用。车里雅宾斯克硅酸盐中的微量元素变化，氧化物和金属颗粒突出了由矿物变化和模式效应以及样本大小赋予的地球化学异质性的重要性。使用一系列样品粉末等分试样尺寸，可以证明这对于 <0.1 g 的 HSE 变得重要。在碳质球粒陨石 Ivuna 的各个等分试样中也发现了高场强元素相对丰度（HFSE：Ti、Zr、Nb、Ta、Hf）的变化，强调了耐火相完全溶解的重要性。此处检查的陨石坠落范围和陨石发现表明，微量元素（例如 Ba、U、Sr）的地球变化效应与 Re/Os 变化的相关性不是特别好。相反，碳质球粒陨石的 Re/Os 比容易受到干扰，比不相容的微量元素系统学所表明的更严重，默奇森 CM2 碳质球粒陨石在样品等分试样之间显示出显着的 Re/Os 分馏。对于未显示显着模式或地球变化影响的样品等分试样，母体过程似乎主要限于热变质和脱水。包括本研究的数据，已发布的 Re-Os 同位素和 HSE 丰度合并数据集现在扩展到 33 个普通、39 个碳质、27 个顽辉石和 6 个 Rumuruti 球粒陨石。这些陨石群中绝对 HSE 丰度的范围约为 30%，所有球粒陨石都具有相同的平均 Os、Ir、Ru、Pt 和 Pd 丰度，在不确定性范围内。值得注意的是，碳质球粒陨石的长期 Re/Os 比其他球粒陨石群低约 8%。普通球粒陨石的¹⁸⁷ Os/ ¹⁸⁸ Os 使它们与大块硅酸盐地球的组成非常匹配。假设普通球粒陨石向地球晚期吸积约 0.5%，这将导致长期 Rb/Sr 比率比碳质球粒陨石后期吸积高约 0.6%，表明普通球粒陨石是中等挥发性富集的潜在有吸引力的来源。