Correlated isotopic and chemical evidence for condensation origins of olivine in comet 81P/Wild 2 and in AOAs from CV and CO chondrites [0.03%]
彗星81P/Wild 2和CV以及CO陨石中AOAs的橄榄石凝聚物起源的同位素和化学证据
Kohei Fukuda,Donald E Brownlee,David J Joswiak et al.
Kohei Fukuda et al.
Magnesium stable isotope ratios and minor element abundances of five olivine particles from comet 81P/Wild 2 were examined by secondary ion mass spectrometry (SIMS). Wild 2 olivine particles exhibit only small variations in δ25Mg values fr...
Oxygen isotope systematics of chondrules in the Paris CM2 chondrite: indication for a single large formation region across snow line [0.03%]
巴黎CM2陨石中球粒的氧同位素系统学：雪线两侧单一大形成区域的指示
Noël Chaumard,Céline Defouilloy,Andreas T Hertwig et al.
Noël Chaumard et al.
In-situ oxygen three-isotope analyses of chondrules and isolated olivine grains in the Paris (CM) chondrite were conducted by secondary ion mass spectrometry (SIMS). Multiple analyses of olivine and/or pyroxene in each chondrule show indist...
The Fe/S ratio of pyrrhotite group sulfides in chondrites: An indicator of oxidation and implications for return samples from asteroids Ryugu and Bennu [0.03%]
陨石中黄铁矿群硫化物的Fe/S比值：氧化指示器以及对来自Ryugu和Bennu小行星返回样品的意义
Devin L Schrader,Jemma Davidson,Timothy J McCoy et al.
Devin L Schrader et al.
Determining compositional trends among individual minerals is key to understanding the thermodynamic conditions under which they formed and altered, and is also essential to maximizing the scientific value of small extraterrestrial samples,...
Diverse impactors in Apollo 15 and 16 impact melt rocks: evidence from osmium isotopes and highly siderophile elements [0.03%]
阿波罗15号和16号任务中撞击熔岩的多种撞击体：来自锇同位素和高度亲铁元素的证据
Jingao Liu,Miriam Sharp,Richard D Ash et al.
Jingao Liu et al.
Concentrations of highly siderophile elements (HSE) and 187Os/188Os isotopic compositions for eleven impact related rocks from the Apollo 15 and 16 landing sites are reported and combined with existing geochronological data to investigate t...
Chromium isotopic insights into the origin of chondrite parent bodies and the early terrestrial volatile depletion [0.03%]
铬同位素制约下的陨石母体来源和早期地表挥发分亏损机制研究
Ke Zhu,Frédéric Moynier,Martin Schiller et al.
Ke Zhu et al.
Chondrites are meteorites from undifferentiated parent bodies that provide fundamental information about early Solar System evolution and planet formation. The element Cr is highly suitable for deciphering both the timing of formation and t...
Uranium isotope compositions of biogenic carbonates - Implications for U uptake in shells and the application of the paleo-ocean oxygenation proxy [0.03%]
生物碳酸盐的铀同位素组成——壳中铀吸收的意义及古海洋氧化性示踪器的应用
B D Livermore,T W Dahl,M Bizzarro et al.
B D Livermore et al.
The application of U isotopes in carbonates as a paleo-ocean oxygenation proxy is based on the critical assumption that the calcareous shell-building organisms incorporate U into their shells without fractionation relative to the U isotopic...
Highly siderophile element and 187Re-187Os isotopic systematics of ungrouped achondrite Northwest Africa 7325: Evidence for complex planetary processes [0.03%]
超嗜硫族元素和锇同位素地球化学：未分类的无球粒陨石NW Africa 7325的类质同象研究及复杂的行星过程证据
Gregory J Archer,Richard J Walker,Anthony J Irving
Gregory J Archer
The abundances of highly siderophile elements (HSE; including Re, Os, Ir, Ru, Pt, and Pd) and 187Re-187Os isotopic systematics were determined for two fragments from ungrouped achondrite NWA 7325. Rhenium-Os systematics are consistent with ...
The relationship between CM and CO chondrites: Insights from combined analyses of titanium, chromium, and oxygen isotopes in CM, CO, and ungrouped chondrites [0.03%]
CM和CO球粒陨石之间的关系：结合分析CM、CO及无群组球粒陨石中钛、铬和氧同位素的启示
Zachary A Torrano,Devin L Schrader,Jemma Davidson et al.
Zachary A Torrano et al.
A close relationship between CM and CO chondrites has been suggested by previous petrologic and isotopic studies, leading to the suggestion that they may originate from similar precursor materials or even a common parent body. In this study...
The Structure of Natural Biogenic Iron (Oxyhydr)oxides Formed in Circumneutral pH Environments [0.03%]
中性PH环境下形成的天然生物铁氧化物（ oxyhydroxide）的结构
Andrew H Whitaker,Robert E Austin,Kathryn L Holden et al.
Andrew H Whitaker et al.
Biogenic iron (Fe) (oxyhydr)oxides (BIOS) partially control the cycling of organic matter, nutrients, and pollutants in soils and water via sorption and redox reactions. Although recent studies have shown that the structure of BIOS resemble...
Regulation of groundwater arsenic concentrations in the Ravi, Beas, and Sutlej floodplains of Punjab, India [0.03%]
印度旁遮普邦拉维河、比阿斯河和萨特莱杰河泛滥平原地下水砷浓度的调控
Anand Kumar,Chander Kumar Singh,Benjamin Bostick et al.
Anand Kumar et al.
Recent testing has shown that shallow aquifers of the Ravi River floodplain are more frequently affected by groundwater arsenic (As) contamination than other floodplains of the upper Indus River basin. In this study, we explore the geochemi...