Trace element and isotopic exchange during acid-basic magma interaction processes
نویسندگان
چکیده
منابع مشابه
Trace element evolution during crystallisation and remelting of the lunar magma ocean
Newly determined ilmenite-melt and orthopyroxene-melt partition coefficients are used to construct quantitative forward models of the evolution of high field strength element (HFSE, Zr, Nb, Hf, Ta, Th, U) and rare earth element (REE: Nd, Sm, Lu) concentrations during crystallisation and subsequent remelting of the Lunar Magma Ocean (LMO). Crystallisation models suggest that the initial LMO must...
متن کاملCalculation of simultaneous isotopic and trace element variations during water-rock interaction with applications to carbonate diagenesis
Equations are developed for the calculation of the simultaneous variations in trace element concentrations and radiogenic and stable isotopic compositions that occur during water-rock interaction. The equations are of general use for modeling chemical and isotopic variations in porous media and are applied here to the diagenesis of carbonate rocks and sediments. The variables which control the ...
متن کاملIsotopic exchange processes in cold plasmas of H2/D2 mixtures.
Isotope exchange in low pressure cold plasmas of H(2)/D(2) mixtures has been investigated by means of mass spectrometric measurements of neutrals and ions, and kinetic model calculations. The measurements, which include also electron temperatures and densities, were performed in a stainless steel hollow cathode reactor for three discharge pressures: 1, 2 and 8 Pa, and for mixture compositions r...
متن کاملTrace element intake by Asians during pregnancy.
In Harrow, we have a community of Asians who originate from Gujarat-a state in north-west India. A study was set up to investigate the trace metal status in this group of Asian vegetarians and non-vegetarians and in a white control group, because the increased demands of pregnancy could precipitate a deficiency in women with marginally adequate diets. The trace element study is part'of a much l...
متن کاملstudy of dna interaction with ethylenediaminetetraacetic acid and sesamol food additives
برهمکنش dnaتیموس گاوی طبیعی (ct-dna) با اتیلن دی آمین تترااستات (edta)در بافرtris-hcl با 8/7 ph ( دراین ph،edta به نمک دی سدیم تبدیل می شود) وسسامول در بافر tris-hcl با4/7 ph مورد بررسی قرار گرفته است. edta و سسامول استفاده فراوانی در تکنولوژی غذایی و صنعت شیمیایی دارند. مدل اتصال dna مربوط بهedta بوسیله اسپکتروفتومتری جذب، دورنگ نمایی حلقوی(cd)، ویسکومتری وژل الکتروفورز بررسی شده است. طیفuv ...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Earth and Environmental Science Transactions of the Royal Society of Edinburgh
سال: 1996
ISSN: 1755-6910,1755-6929
DOI: 10.1017/s0263593300006635