FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2023756997> ?p ?o ?g. }

• W2023756997 endingPage "59" @default.
• W2023756997 startingPage "38" @default.
• W2023756997 abstract "Stable isotope (O, H, C), radiogenic isotope (Sr, Nd) and trace element analyses have been applied to quartz–dolomite veins and their uranium(U)-bearing fluid inclusions associated with Proterozoic unconformity-related UO2 (uraninite) ores in the Athabasca Basin (Canada) in order to trace the evolution of pristine evaporated seawater towards U-mineralizing brines during their migration through sediments and basement rocks. Fluid inclusion data show that quartz and dolomite have precipitated from brines of comparable chemistry (excepted for relatively small amounts of CO2 found in dolomite-hosted fluid inclusions). However, δ18O values of quartz veins (δ18O = 11‰ to 18‰) and dolomite veins (δ18O = 13‰ to 24‰) clearly indicate isotopic disequilibrium between quartz and dolomite. Hence, it is inferred that this isotopic disequilibrium primarily reflects a decrease in temperature between the quartz stage (∼180 °C) and the dolomite stage (∼120 °C). The δ13C values of CO2 dissolved in dolomite-hosted fluid inclusions (δ13C = −30‰ to −4‰) and the δ13C values of dolomite (δ13C = −23.5‰ to −3.5‰) indicate that the CO2 dissolved in the mineralizing brines originated from brine–graphite interactions in the basement. The resulting slight increase in the fluid partial pressure of CO2 (pCO2) may have triggered dolomite precipitation instead of quartz. δ18O values of quartz veins and previously published δ18O values of the main alteration minerals around the U-ores (illite, chlorite and tourmaline) show that quartz and alteration minerals were isotopically equilibrated with the same fluid at ∼180 °C. The REE concentrations in dolomite produce PAAS-normalized patterns that show some similarities with that of UO2 and are clearly distinct from that of the other main REE-bearing minerals in these environments (monazite, zircon and aluminum phosphate–sulfate (APS) minerals). The radiogenic isotope compositions of dolomite (87Sr/86Sri = 0.7053 to 0.7161 and εNd(t) = −8.8 to −20.3) differ from one deposit to another, reflecting both heterogeneity in the basement geology and variable preservation of the original composition of brines. The previously published 87Sr/86Sri and εNd(t) values of UO2 compare with the most evolved dolomites, i.e. dolomites precipitated from brines that exchanged the most with the basement. This reinforces a close genetic link between dolomites and UO2 deposition and implies that UO2 deposition occurred in a cooling system during the transition from quartz to dolomite formation. The δ18O and δD values of the mineralizing brines (δ18O = −1‰ to 8‰ and δD = −150‰ to −50‰) are considerably shifted from that of their theoretical original values acquired during evaporation of seawater (δ18O = ∼−3‰ and δD = ∼−40‰). The positive δ18O shift is explained by protracted fluid–rock interaction within the basin and basement rocks. The negative δD shift is attributed to incomplete mixing between the U-mineralizing brines and low δD water. This low δD water was likely produced during the abiogenic synthesis of bitumen by Fisher–Tropsch-like reactions involving CO2 derived from brine–graphite interaction in the basement, and radiolytic H2. The resulting low δD brines have been equilibrated with alteration minerals. This may explain why some alteration minerals yield anomalously low δD values whose significance has long been debated." @default.
• W2023756997 created "2016-06-24" @default.
• W2023756997 creator A5009518565 @default.
• W2023756997 creator A5026069865 @default.
• W2023756997 creator A5033602397 @default.
• W2023756997 creator A5034326743 @default.
• W2023756997 creator A5038057915 @default.
• W2023756997 creator A5045176864 @default.
• W2023756997 creator A5048436671 @default.
• W2023756997 date "2013-07-01" @default.
• W2023756997 modified "2023-10-06" @default.
• W2023756997 title "From evaporated seawater to uranium-mineralizing brines: Isotopic and trace element study of quartz–dolomite veins in the Athabasca system" @default.
• W2023756997 cites W1207354341 @default.
• W2023756997 cites W1563822779 @default.
• W2023756997 cites W1570456448 @default.
• W2023756997 cites W1601037315 @default.
• W2023756997 cites W1811157683 @default.
• W2023756997 cites W1963525558 @default.
• W2023756997 cites W1963757240 @default.
• W2023756997 cites W1964327963 @default.
• W2023756997 cites W1964816750 @default.
• W2023756997 cites W1966177718 @default.
• W2023756997 cites W1966500375 @default.
• W2023756997 cites W1966638191 @default.
• W2023756997 cites W1969414340 @default.
• W2023756997 cites W1971179416 @default.
• W2023756997 cites W1971940673 @default.
• W2023756997 cites W1973348628 @default.
• W2023756997 cites W1973474816 @default.
• W2023756997 cites W1974023844 @default.
• W2023756997 cites W1974144355 @default.
• W2023756997 cites W1977672399 @default.
• W2023756997 cites W1980270038 @default.
• W2023756997 cites W1980598307 @default.
• W2023756997 cites W1983846167 @default.
• W2023756997 cites W1988978036 @default.
• W2023756997 cites W1990148864 @default.
• W2023756997 cites W1990581568 @default.
• W2023756997 cites W1991436008 @default.
• W2023756997 cites W1992515678 @default.
• W2023756997 cites W1993085411 @default.
• W2023756997 cites W1994083769 @default.
• W2023756997 cites W1994976781 @default.
• W2023756997 cites W1996165067 @default.
• W2023756997 cites W1997866625 @default.
• W2023756997 cites W1998933135 @default.
• W2023756997 cites W1999963561 @default.
• W2023756997 cites W2002637401 @default.
• W2023756997 cites W2003704271 @default.
• W2023756997 cites W2004338889 @default.
• W2023756997 cites W2005767181 @default.
• W2023756997 cites W2007738410 @default.
• W2023756997 cites W2008281306 @default.
• W2023756997 cites W2009532479 @default.
• W2023756997 cites W2011490710 @default.
• W2023756997 cites W2015807353 @default.
• W2023756997 cites W2017288756 @default.
• W2023756997 cites W2024914769 @default.
• W2023756997 cites W2026608718 @default.
• W2023756997 cites W2028179578 @default.
• W2023756997 cites W2029945734 @default.
• W2023756997 cites W2031900268 @default.
• W2023756997 cites W2036865264 @default.
• W2023756997 cites W2037447751 @default.
• W2023756997 cites W2042240398 @default.
• W2023756997 cites W2042477785 @default.
• W2023756997 cites W2044621372 @default.
• W2023756997 cites W2046139359 @default.
• W2023756997 cites W2046510881 @default.
• W2023756997 cites W2048308230 @default.
• W2023756997 cites W2049524331 @default.
• W2023756997 cites W2049953983 @default.
• W2023756997 cites W2050635031 @default.
• W2023756997 cites W2053095414 @default.
• W2023756997 cites W2055721402 @default.
• W2023756997 cites W2062736555 @default.
• W2023756997 cites W2062746313 @default.
• W2023756997 cites W2063963575 @default.
• W2023756997 cites W2066276095 @default.
• W2023756997 cites W2068202901 @default.
• W2023756997 cites W2073451667 @default.
• W2023756997 cites W2074041658 @default.
• W2023756997 cites W2078372924 @default.
• W2023756997 cites W2084070093 @default.
• W2023756997 cites W2086661793 @default.
• W2023756997 cites W2087015872 @default.
• W2023756997 cites W2087280943 @default.
• W2023756997 cites W2087808213 @default.
• W2023756997 cites W2087892660 @default.
• W2023756997 cites W2088440167 @default.
• W2023756997 cites W2089008629 @default.
• W2023756997 cites W2089018729 @default.
• W2023756997 cites W2096395977 @default.
• W2023756997 cites W2096807711 @default.
• W2023756997 cites W2097330636 @default.
• W2023756997 cites W2109741451 @default.
• W2023756997 cites W2111971301 @default.
• W2023756997 cites W2118081486 @default.

• next