دانلود رایگان مقاله لاتین ایزوتوپ پایدار کلر از سایت الزویر
عنوان فارسی مقاله:
ایزوتوپ پایدار کلر در حوزه غیر دریایی خشک: نمونه و مکانیزم شکنش ممکن
عنوان انگلیسی مقاله:
Stable chlorine isotopes in arid non-marine basins: Instances and possible fractionation mechanisms
سال انتشار : 2016
برای دانلود رایگان مقاله ایزوتوپ پایدار کلر اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Over the last three decades, stable chlorine isotopes have emerged as useful geochemical and forensic tracers (e.g. Philp, 2007; Eggenkamp, 2014). In low-temperature geochemistry, they are useful is systems where halite is crystallized or dissolved, and where diffusion operates on chloride ion. Stable chlorine isotope studies of Phanerozoic marine evaporites (Eggenkamp et al., 1995; Eastoe et al., 2007 and references therein) have demonstrated a narrow range of d37Cl in marine halite facies salt, predominantly 0 ± 0.5‰, with a few outliers to ± 1.0‰. The narrow d37Cl range results from the probable constancy of d37Cl in Phanerozoic seawater (Eastoe et al., 2007) and the small isotope fractionation (0.30‰, averaged from Eggenkamp et al., 1995 and Eggenkamp et al., 2016) between halite and its aqueous solution. Eastoe et al. (2007) pointed out that the range of mean d37Cl values for marine halite facies of a variety of ages in the Phanerozoic exceeds the range predicted on the basis of the halite fractionation factor by a factor of 4 or 5. Evaporites in continental closed basins present a very different isotope spectrum. Available data (reviewed below) indicate a d37Cl range of 0 ± 3‰ in lacustrine/closed basin halite, and a range that extends to þ5.5‰ in other kinds of continental halite occurrence. The detailed fractionation mechanisms involved in generating the more extreme d37Cl values have remained unclear. Available mechanisms discussed in the literature to date include equilibrium fractionation occurring on crystallization of salts from aqueous solution (Eggenkamp et al., 1994; Eggenkamp and Coleman, 2009; Luo et al., 2014) and disequilibrium fractionation attending the diffusion of chloride ion across concentration gradients (Eggenkamp et al., 1994; Eggenkamp and Coleman, 2009). Ion filtration is a special case of diffusion (Phillips and Bentley, 1987). These, with the possible addition of isotope fractionation associated with chloride uptake in halophytic plants, to be discussed below, and atmospheric fractionation of chloride eventually incorporated into rainwater (Sun et al., 2004; Kohler and Wassenaar, 2010; Liu et al., 2008), appear to be the only availablemechanisms at the earth surface. In addition to fractionating isotopes, a viable mechanism for continental basins must lead to a persistent spatial separation of isotopically enriched and depleted fractions of chloride. The aims of this article are to review the published data for lacustrine and associated halite in arid and semiarid continental basins, to add unpublished data from the archives of the Environmental Isotope Laboratory at the University of Arizona, and to present and discuss some ways in which diffusion and halite crystallization might generate the observed range of d37Cl under specialized conditions.
برای دانلود رایگان مقاله ایزوتوپ پایدار کلر اینجا کلیک نمایید.
کلمات کلیدی:
Stable chlorine isotope evidence for non-marine chloride in Badenian ... onlinelibrary.wiley.com/doi/10.1046/j.1365-3121.1999.00235.x/abstract by CJ Eastoe - 1999 - Cited by 28 - Related articles Stable chlorine isotope evidence for non-marine chloride in Badenian ... the East Slovakian and Transcarpathian basins has a δ37Cl range of – 0.2 to 0.8‰. Non-Traditional Stable Isotopes - Page 374 - Google Books Result https://books.google.com/books?isbn=3110545632 Fang-Zhen Teng, James Watkins, Nicolas Dauphas - 2017 - Science ... New evidence from bulk rock geochemistry, uid inclusions and stable isotopes. ... and atomic weight of chlorine from meteorites and from minerals of non-marine origin: ... of perchlorate and nitrate co-occurrence in arid and semi-arid environments. ... Chlorine stable isotope distribution of Michigan Basin formation waters. Chlorine Isotope Geochemistry - Reviews in Mineralogy and ... rimg.geoscienceworld.org/content/82/1/345.full.pdf It was not until ~75 years after the discovery of the stable isotopes of Cl that they ...... sedimentary rocks deposited in a shallow marine basin from Chile have also have primarily .... they are found primarily in arid environments (Jackson et al. USING IODINE ISOTOPES TO CONSTRAIN SUPERGENE FLUID ... econgeol.geoscienceworld.org/content/108/1/163.full-text.pdf 2013 - Cited by 9 - Related articles Nov 29, 2011 - to 14 to 9 Ma under a semiarid to arid climate, followed by a late stage of ... stable (127I) iodine in supergene iodide minerals and iodine- rich soil from the ..... arc marines basins (Muramatsu and Wedepohl, 1998; Snyder et al., 2010). ... isotope data (δ37Cl) indicate that the chlorine found in the su- pergene ... Applied geochemistry - Terkko Navigator https://www.terkko.helsinki.fi/.../15294624_stable-chlorine-isotope... Translate this page Stable chlorine isotopes in arid non-marine basins: Instances and possible fractionation mechanisms. Added 209 days ago (05.09.2016). Journal: Applied ... Encyclopedia of Paleoclimatology and Ancient Environments https://books.google.com/books?isbn=1402045514 Vivien Gornitz - 2008 - Science Chlorine-36 tracing of salinity sources in the Dry Valley of Victoria Land, ... Evaporites: marine or non-marine. ... Marine evaporites: arid shorelines and basins. ... Past Climates Sedimentary Indicators of Climate Change Stable Isotope Analysis ...
