Petrogenesis and Provenance of Ungrouped Achondrite Northwest Africa 7325 from Petrology, Trace Elements, Oxygen, Chromium and Titanium Isotopes, and Mid-IR Spectroscopy [0.03%]
西北非未分类无球粒陨石NWA 7325的岩石学、微量元素、氧同位素、铬同位素和钛同位素及中红外光谱研究及其岩浆成因和来源探讨
Cyrena A Goodrich,Noriko T Kita,Qing-Zhu Yin et al.
Cyrena A Goodrich et al.
Northwest Africa (NWA) 7325 is an ungrouped achondrite that has recently been recognized as a sample of ancient differentiated crust from either Mercury or a previously unknown asteroid. In this work we augment data from previous investigat...
Experimentally Determined Subsolidus Metal-Olivine Element Partitioning with Applications to Pallasites [0.03%]
实验测定的亚固相金属-橄榄岩元素分配系数及其在 Pallase 石铁陨石中的应用
Patrick H Donohue,Eddy Hill,Gary R Huss
Patrick H Donohue
Pallasite meteorites, which consist primarily of olivine and metal, may be remnants of disrupted core-mantle boundaries of differentiated asteroids or planetesimals. The early thermal histories of pallasites are potentially recorded by mino...
LOW-TEMPERATURE AQUEOUS ALTERATION ON THE CR CHONDRITE PARENT BODY: IMPLICATIONS FROM IN SITU OXYGEN-ISOTOPE ANALYSES [0.03%]
低温水热作用在CR球粒陨石母体上的证据：来自就位氧同位素分析的启示
Christine E Jilly-Rehak,Gary R Huss,Kazu Nagashima et al.
Christine E Jilly-Rehak et al.
The presence of hydrated minerals in chondrites indicates that water played an important role in the geologic evolution of the early Solar System; however, the process of aqueous alteration is still poorly understood. Renazzo-like carbonace...
High Abundances of Presolar Grains and 15N-rich Organic Matter in CO3.0 Chondrite Dominion Range 08006 [0.03%]
富宇宙尘粒和含氮丰度异常的有机质的CO3.0球状陨石DR 08006的研究
Larry R Nittler,Conel M O&#x;D Alexander,Jemma Davidson et al.
Larry R Nittler et al.
NanoSIMS C-, N-, and O-isotopic mapping of matrix in CO3.0 chondrite Dominion Range (DOM) 08006 revealed it to have in its matrix the highest abundance of presolar O-rich grains (257 +76/-96 ppm, 2σ) of any meteorite. It also has a matrix ...
Mercury flux from salt marsh sediments: Insights from a comparison between 224Ra/228Th disequilibrium and core incubation methods [0.03%]
基于224Ra/228Th 平衡和核心培养方法比较的盐沼沉积物中汞通量研究
Xiangming Shi,Robert P Mason,Matthew A Charette et al.
Xiangming Shi et al.
In aquatic environments, sediments are the main location of mercury methylation. Thus, accurate quantification of methylmercury (MeHg) fluxes at the sediment-water interface is vital to understanding the biogeochemical cycling of mercury, e...
The effect of Ca2+ ions and ionic strength on Mn(II) oxidation by spores of the marine Bacillus sp. SG-1 [0.03%]
Ca2+离子和盐度对海洋芽孢杆菌SG-1胞子氧化Mn(II)的影响研究
Kazuhiro Toyoda,Bradley M Tebo
Kazuhiro Toyoda
Manganese(IV) oxides, believed to form primarily through microbial activities, are extremely important mineral phases in marine environments where they scavenge a variety of trace elements and thereby control their distributions. The presen...
I-Xe systematics of the impact plume produced chondrules from the CB carbonaceous chondrites: Implications for the half-life value of 129I and absolute age normalization of 129I-129Xe chronometer [0.03%]
CB碳质球粒陨石撞击羽流产生的球粒中的I-Xe体系化学：对129I的半衰期数值及129I-129Xe同位素定年计时器绝对年龄标定的意义
O Pravdivtseva,A Meshik,C M Hohenberg et al.
O Pravdivtseva et al.
It is inferred that magnesian non-porphyritic chondrules in the CB (Bencubbin-type) carbonaceous chondrites formed in an impact generated plume of gas and melt at 4562.49 ± 0.21 Ma (Bollard et al., 2015) and could be suitable for the absol...
Alex Meshik,Charles Hohenberg,Olga Pravdivtseva et al.
Alex Meshik et al.
One of the major goals of the Genesis Mission was to refine our knowledge of the isotopic composition of the heavy noble gases in solar wind and, by inference, the Sun, which represents the initial composition of the solar system. This has ...
Calcite dissolution rate spectra measured by in situ digital holographic microscopy [0.03%]
原位数字全息显微镜测量文石溶解速率谱
Alexander S Brand,Pan Feng,Jeffrey W Bullard
Alexander S Brand
Digital holographic microscopy in reflection mode is used to track in situ, real-time nanoscale topography evolution of cleaved (104) calcite surfaces exposed to flowing or static deionized water. The method captures full-field holograms of...
Enhanced availability of mercury bound to dissolved organic matter for methylation in marine sediments [0.03%]
海洋沉积物中与溶解有机质结合的汞的可用性增强及其甲基化作用
Nashaat M Mazrui,Sofi Jonsson,Sravan Thota et al.
Nashaat M Mazrui et al.
The forms of inorganic mercury (HgII) taken up and methylated by bacteria in sediments still remain largely unknown. From pure cultures studies, it has been suggested that dissolved organic matter (DOM) may facilitate the uptake either by a...