Isotopic and trace element constraints on the origin and evolution of saline groundwaters from central Missouri

Banner, Jay L.; Wasserburg, G. J.; Dobson, Patrick; Carpenter, Alden B.; Moore, Clyde H.

doi:10.1016/0016-7037(89)90390-6

Cited by 200 publications

(85 citation statements)

References 42 publications

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“…4 and 9). Modern formation fluids are largely interpreted to have experienced increased ␦ 18 O values during increased water-rock interaction with increasing temperatures (Hitchon and Friedman, 1969;Knauth, 1988;Banner et al, 1989;Egeberg and Aagaard, 1989;Connolly et al, 1990;Pauwels et al, 1993;Moldovanyi et al, 1993;Wilson and Long, 1993). Interestingly, the isotope values recorded in modern systems require isotopically depleted initial fluid ␦ 18 O compositions.…”

Section: Environment Of Reequilibrationmentioning

confidence: 99%

Evolution of Neoproterozoic Wonoka–Shuram Anomaly-aged carbonates: Evidence from clumped isotope paleothermometry

Loyd

Corsetti

Eagle

et al. 2015

Precambrian Research

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a b s t r a c tThe Wonoka-Shuram Anomaly represents the largest negative carbon isotope excursion recognized in the geologic record and is associated with the emergence and diversification of metazoan life ca. 580 million years ago (Ma). The origin of the anomaly is highly debated, with interpretations ranging from primary to diagenetic, each having unique and potentially transformative implications for early life. Here, we apply carbonate clumped isotope thermometry to three sections expressing the anomaly in order to constrain mineral formation temperatures and thus directly calculate water oxygen isotope compositions (␦ 18 O w ) with which carbonate minerals equilibrated. With ␦ 18 O w known, it is possible to address previous hypotheses for the origin of the anomaly. In each section, precipitation temperatures correlate positively with reconstructed ␦ 18 O w . Previous hypotheses, based on the covariance of ␦ 18 O carb vs. ␦ 13 C carb (uncorrected for temperature effects), suggested a meteoric diagenetic origin for the anomaly. However, reconstructed ␦ 18 O w values do not covary with carbon isotope compositions (␦ 13 C carb ) within anomaly facies. Rather, the oxygen isotope and temperature data are consistent with carbonate recrystallization and equilibration under increasingly rock-buffered conditions. Based on simple modeling and comparison to modern formation fluids, recrystallization may have occurred in an environment far removed from the initial depositional or early diagenetic regime. In addition, although clumped isotope temperatures vary significantly and reach elevated values consistent with burial diagenesis, it is unclear to what degree, if at all, carbon isotope values were reset during recrystallization. Ultimately, these new data indicate that Wonoka-Shuram-aged carbonates experienced equilibration with fluids under increasingly closedsystem conditions. The clumped isotope data do not provide a means to distinguish previous hypotheses outright, but provide additional context for the evaluation of geochemical signatures within these ancient carbonate rocks.

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Section: Environment Of Reequilibrationmentioning

confidence: 99%

Evolution of Neoproterozoic Wonoka–Shuram Anomaly-aged carbonates: Evidence from clumped isotope paleothermometry

Loyd

Corsetti

Eagle

et al. 2015

Precambrian Research

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“…Strontium isotopes have proven to be a useful tool in determining water-rock interactions, as a tracer for groundwater movement, and in determining the origins of water or of salinity (McNutt et al 1984;Banner et al 1989;Anderson et al 1992;Krishnawami et al 1992;Banner et al 1994;Lyons et al 1995 Similarly, older rocks have higher 87 Sr/ 86 Sr ratios than younger rocks given a similar Rb/Sr ratio in the rocks (Banner 2004) Simultaneously, Sr behaves similarly to Ca, so Sr is more closely associated with Ca bearing minerals and rocks (Faure and Powell 1972).…”

Section: Strontium Isotopesmentioning

confidence: 99%

Geochemical evolution of uraniferous soda lakes in Eastern Mongolia

Linhoff

Bennett

Puntsag³

et al. 2010

Environ Earth Sci

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“…The first group involves water samples from the deep aquifers of the Sbeïtla and Djérid-Nefzaoua basins, as well as from the shallow aquifer of the Gafsa-south basin; it is characterized by the most depleted stable isotope contents. These contents do not show any patterns of enrichment that could be attributed either to evaporation of meteoric water during recharge (Allison 1982), or to extensive water-rock interactions following recharge (Banner et al 1989). The isotopic depletion of this group, relative to the Weighted Mean Regional Precipitation (WMRP), suggests lower condensation temperatures of the precipitation that contributed to Isotopic tracing for conceptual models of groundwater hydrodynamicsthe aquifer recharge.…”

Section: For Location)mentioning

confidence: 99%

Isotopic tracing for conceptual models of groundwater hydrodynamics in multilayer aquifer systems of central and southern Tunisia

Dassi

Tarki

2014

Hydrological Sciences Journal

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New and previously published data sets including stable and radiogenic isotope measurements ( C and 14 C) were used to investigate, conceptualize and compare groundwater hydrodynamics within three major multilayer aquifer systems located in central and southern Tunisia. It has been demonstrated that the investigated aquifer systems contain modern and palaeoclimatic waters. Modern groundwaters, which refer to contemporaneous and post-nuclear recharge waters, are characterized by enriched stable isotope contents, high carbon-14 activities and high to moderate tritium concentration. While palaeoclimatic groundwaters, which refer to Late Pleistocene and Early Holocene recharge waters, are distinguished by their depleted stable isotope contents, low carbon-14 activities and insignificant tritium concentrations. Established conceptual models have elucidated the groundwater hydrodynamics within the studied aquifer systems. They show that groundwater mixing occurs between end-members from the shallow and deep aquifers that migrate by downward and upward leakage towards the intermediate aquifer.Key words multilayer aquifer systems; isotope tracing; conceptual models mixing; palaeowaters; modern groundwaters Traçage isotopique pour la modélisation conceptuelle de l'hydrodynamisme des eaux souterraines dans les systèmes aquifères multicouches du centre et du Sud de la Tunisie H. Les modèles conceptuels établis ont élucidé l'hydrodynamisme des eaux souterraines dans les systèmes aquifères étudiés. Ils ont mis en évidence le mélange de deux pôles d'eaux souterraines qui migrent par drainance verticale à partir des aquifères profonds et superficiels vers le niveau aquifère intermédiaire.

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Isotopic and trace element constraints on the origin and evolution of saline groundwaters from central Missouri

Cited by 200 publications

References 42 publications

Evolution of Neoproterozoic Wonoka–Shuram Anomaly-aged carbonates: Evidence from clumped isotope paleothermometry

Evolution of Neoproterozoic Wonoka–Shuram Anomaly-aged carbonates: Evidence from clumped isotope paleothermometry

Geochemical evolution of uraniferous soda lakes in Eastern Mongolia

Isotopic tracing for conceptual models of groundwater hydrodynamics in multilayer aquifer systems of central and southern Tunisia

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