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作者:Hui Ye , Changzhi Wu , Matthew J. Brzozowski ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.271, pp.78-95
摘要:Abstract(#br)Equilibrium isotope fractionation factors are the basis for application of stable isotopes in geological studies. Experimental calibration and theoretical calculations have been employed to determine Fe isotope fractionation factors for a variety of minerals, ho...
作者:Anne J. Whitworth , Helen E.A. Brand , Siobhan A. Wilson ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.270, pp.282-295
摘要:Abstract(#br)Jarosite is a common mineral in acidic, sulfate-rich environments where it is critical in regulating the acidity of aquatic systems and the mobility of trace elements and potential contaminants. This research aims to understand jarosite formation and recrystalli...
作者:Liza K. McDonough , Helen Rutlidge , Denis M. O'Carroll ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.273, pp.163-176
摘要:Abstract(#br)Groundwater organic matter is processed within aquifers through transformations such as the adsorption of dissolved organic matter (DOM) to minerals and biodegradation. The molecular character of DOM varies according to its source and this can impact its bioavai...
作者:Steven Goderis , Bastien Soens , Matthew S. Huber ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.270, pp.112-143
摘要:Abstract(#br)A newly discovered sedimentary accumulation of micrometeorites in the Sør Rondane Mountains of East Antarctica, close to the Widerøefjellet summit at ∼2750 m above sea level, is characterized in this work. The focus here lies on 2099 melted cosmic spherules larg...
作者:J. Guignard , G. Quitté , M. Méheut ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.269, pp.238-256
摘要:Abstract(#br)Metal-silicate fractionation of nickel isotopes has been experimentally quantified at 1623 K, with oxygen fugacities varying from 10 −8.2 to 10 −9.9 atm and for run durations from 0.5 to 1 h. Both kinetic and equilibrium fractionations have been studied. A wire ...
作者:Kathryn E. Watts , Celestine N. Mercer
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.272, pp.54-77
摘要:Abstract(#br)Voluminous silicic magmatism was coeval with iron ore mineralization in the St. Francois Mountains terrane in southeast Missouri, part of the broader Mesoproterozoic Granite-Rhyolite province along the eastern margin of Laurentia. Some of the iron deposits conta...
作者:Paul V. Ullmann , David E. Grandstaff , Richard D. Ash ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.269, pp.223-237
摘要:Abstract(#br)The Standing Rock Hadrosaur Site (SRHS) in South Dakota preserves a mass-death assemblage of the hadrosaurine dinosaur Edmontosaurus annectens in the Upper Cretaceous Hell Creek Formation. A previous study of SRHS bones found many of them to yield microstructures mor...
作者:Roberto F. Weinberg , Lauren C. Wolfram , Oliver Nebel ...
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.269, pp.398-412
摘要:Abstract(#br)Monazite is an abundant accessory mineral in metasedimentary rocks and their anatectic products. Trace element analysis combined with U-Pb dating of monazite is widely used to reconstruct P-T-t histories of high-grade metamorphic terranes. This approach relies o...
作者:Scott R. Beeler , Fernando J. Gomez , Alexander S. Bradley
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2020, Vol.269, pp.136-149
摘要:Abstract(#br)Microbialites and abiogenic carbonates of the closed-basin hypersaline lake Laguna Negra (Catamarca Province, Argentina) are highly enriched in both 13 C and 18 O. These carbonates precipitate in the zone of recharge where lake water mixes with groundwater. We e...

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