全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Ming Tang , William F. McDonough , Richard D. Ash
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2017, Vol.197, pp.132-141Elsevier
摘要:Abstract(#br)Lower crustal recycling depletes the continental crust of Eu and Sr and returns Eu and Sr enriched materials into the mantle (e.g., Tang et al., 2015, Geology). To test the hypothesis that the MORB source mantle balances the Eu and Sr deficits in the continental...
作者:Richard D. Ash , David A. Kring
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2015, Vol.155, pp.122-153Elsevier
摘要:Abstract(#br)Concentrations of highly siderophile elements (HSE) and 187 Os/ 188 Os 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 the chemical nature ...
作者:Robert W. Nicklas , Igor S. Puchtel , Richard D. Ash
来源:[J].Chemical Geology(IF 3.154), 2016, Vol.433, pp.36-45Elsevier
摘要:Abstract(#br)Oxygen fugacity of the mantle ( f O 2 ) is an important intensive variable in Earth sciences that is largely unconstrained throughout Earth history. Oxygen fugacity of modern basalts is determined by examining the Fe + 3 /Fe + 2 ratios of fresh volcanic glass, b...
作者:Richard D. Ash , Philip M. Piccoli
来源:[J].Journal of Radioanalytical and Nuclear Chemistry(IF 1.467), 2014, Vol.302 (1), pp.57-67Springer
摘要:Abstract(#br)Analysis of post-nuclear detonation materials provides information on the type of device and its origin. Compositional analysis of trinitite glass, fused silicate material produced from the above ground plasma during the detonation of the Trinity nuclear bomb, r...
作者:Richard D. Ash , Yang Liu ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2012, Vol.81, pp.94-128Elsevier
摘要:Abstract(#br)New major- and trace-element abundances, highly siderophile element (HSE: Os, Ir, Ru, Pt, Pd, Re) abundances, and oxygen and rhenium–osmium isotope data are reported for oligoclase-rich meteorites Graves Nunataks 06128 and 06129 (GRA 06128/9), six brachinites (B...
作者:Richard D. Ash , James A. Van Orman ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2013, Vol.112, pp.340-373Elsevier
摘要:Abstract(#br)Metallic phases and siderophile elements are critical to understanding the petrogenesis of the enigmatic ureilite meteorites. We obtained petrographic, major and minor element, and the first in situ trace element data for metallic phases (metal, sulfides, phosph...
作者:... William F. McDonough , Richard D. Ash , Sarah A. Saslow
来源:[J].Meteoritics & Planetary Science(IF 2.8), 2017, Vol.52 (6), pp.1133-1145Wiley
摘要:Abstract(#br)Experimental trace element partitioning values are often used to model the chemical evolution of metallic phases in meteorites, but limited experimental data were previously available to constrain the partitioning behavior in the basic Fe‐Ni system. In this stud...
作者:Richard D. Ash , David S. Draper
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2011, Vol.305 (3-4), pp.425-434Elsevier
摘要:Abstract(#br)Solid metal/liquid metal partitioning experiments were conducted at 9 GPa and 1323–1873 K in the Fe–S system. Analysis of the experimental charges by in situ laser ablation inductively coupled plasma mass spectrometry enabled partitioning results to be obtained ...
作者:... Timothy J. McCoy , Richard D. Ash , Jeremy J. Bellucci
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2008, Vol.72 (8), pp.2198-2216Elsevier
摘要:Abstract(#br)A 187 Re– 187 Os isochron including data for all twelve IVB irons gives an age of 4579 ± 34 Ma with an initial 187 Os/ 188 Os of 0.09531 ± 0.00022, consistent with early solar system crystallization. This result, along with the chemical systematics of the highly...
作者:... Frank Wombacher , Richard D. Ash , Phil M. Piccoli
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2009, Vol.74 (2), pp.661-683Elsevier
摘要:Abstract(#br)Pyroxenitic layers are a minor constituent of ultramafic mantle massifs, but are considered important for basalt generation and mantle refertilization. Mafic spinel websterite and garnet–spinel clinopyroxenite layers within Jurassic ocean floor peridotites from ...

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