K R Bermingham,R J Walker
K R Bermingham
The approximately chondritic relative, and comparatively high absolute m antle abundances of the highly siderophile elem ents (HSE), suggest that their concentrations in the bulk silicate Earth were primarily established during a final ~0.5...
New insights into Mo and Ru isotope variation in the nebula and terrestrial planet accretionary genetics [0.03%]
天体星云中钼和钌同位素变化以及 terrestrial planet accretionary genetics 新见解
K R Bermingham,E A Worsham,R J Walker
K R Bermingham
When corrected for the effects of cosmic ray exposure, Mo and Ru nucleosynthetic isotope anomalies in iron meteorites from at least nine different parent bodies are strongly correlated in a manner consistent with variable depletion in s-pro...
Excess 180W in IIAB iron meteorites: Identification of cosmogenic, radiogenic, and nucleosynthetic components [0.03%]
IIAB铁陨石中的过剩180W：宇宙成因、放射性成因和核合成组分的鉴别
David L Cook,Thomas Smith,Ingo Leya et al.
David L Cook et al.
The origin of 180W excesses in iron meteorites has been a recently debated topic. Here, a suite of IIAB iron meteorites was studied in order to accurately determine the contribution from galactic cosmic rays (GCR) and from potential decay o...
Characterizing cosmochemical materials with genetic affinities to the Earth: Genetic and chronological diversity within the IAB iron meteorite complex [0.03%]
具有地球遗传亲缘关系的宇宙化学物质的特征化：IAB铁质陨石复合体内的遗传和时间多样性
Emily A Worsham,Katherine R Bermingham,Richard J Walker
Emily A Worsham
The IAB iron meteorite complex consists of a main group (MG) and five chemical subgroups (sLL, sLM, sLH, sHL, and sHH). Here, mass-independent Mo and radiogenic 182W isotope compositions are reported for IAB complex meteorites to evaluate t...
Origin of crystalline silicates from Comet 81P/Wild 2: Combined study on their oxygen isotopes and mineral chemistry [0.03%]
彗星81P/Wild 2结晶硅酸盐的起源：结合氧同位素和矿物化学的研究
Céline Defouilloy,Daisuke Nakashima,David J Joswiak et al.
Céline Defouilloy et al.
In order to explore the link between comet 81P/Wild 2 and materials in primitive meteorites, seven particles 5 to 15 μm in diameter from comet 81P/Wild 2 have been analyzed for their oxygen isotope ratios using a secondary ion mass spectro...
Atmospheric constituents and surface-level UVB: Implications for a paleoaltimetry proxy and attempts to reconstruct UV exposure during volcanic episodes [0.03%]
大气组分与地表UVB辐射：对古海拔代理及火山爆发期间UV辐射重建的影响与启示
Brian C Thomas,Byron D Goracke,Sean M Dalton
Brian C Thomas
Chemical and morphological features of spores and pollens have been linked to changes in solar ultraviolet radiation (specifically UVB, 280-315 nm) at Earth's surface. Variation in UVB exposure as inferred from these features has been sugge...
Radial mixing and Ru-Mo isotope systematics under different accretion scenarios [0.03%]
不同聚集情况下径向混合及钌钼同位素体系特征
Rebecca A Fischer,Francis Nimmo,David P O&#x;Brien
Rebecca A Fischer
The Ru-Mo isotopic compositions of inner Solar System bodies may reflect the provenance of accreted material and how it evolved with time, both of which are controlled by the accretion scenario these bodies experienced. Here we use a total ...
Early accretion of protoplanets inferred from a reduced inner solar system 26Al inventory [0.03%]
根据太阳系内部较少的26铝库存推断原行星早期聚集效应
Martin Schiller,James N Connelly,Aslaug C Glad et al.
Martin Schiller et al.
The mechanisms and timescales of accretion of 10-1000 km sized planetesimals, the building blocks of planets, are not yet well understood. With planetesimal melting predominantly driven by the decay of the short-lived radionuclide 26Al (26A...
Ehsan Qorbani,Irene Bianchi,Götz Bokelmann
Ehsan Qorbani
We analyze seismic anisotropy for the Eastern Alpine region by inspecting shear-wave splitting from SKS and SKKS phases. The Eastern Alpine region is characterized by a breakdown of the clear mountain-chain-parallel fast orientation pattern...
Irene Bianchi,Meghan S Miller,Götz Bokelmann
Irene Bianchi
Analyses of Ps and Sp receiver functions from datasets collected by permanent and temporary seismic stations, image a seismic discontinuity, due to a negative velocity contrast across the entire Eastern Alps. The receiver functions show the...