Výsledky vyhledávání

Kinetics of D/H isotope fractionation between molecular hydrogen and water

Autor: Pester, NJ, Conrad, ME, Knauss, KG, DePaolo, DJ

At equilibrium, the D/H isotope fractionation factor between H2 and H2O (αH2O-H2(eq)) is a sensitive indicator of temperature, and has been used as a geothermometer for natural springs and gas discharges. However, δDH2 measured in spring waters may

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::aa5580d772110603674043e8cc4f6fbd
https://escholarship.org/uc/item/9wh4m06t

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Authigenic carbonate formation rates in marine sediments and implications for the marine δ13C record

Autor: Mitnick, EH, Lammers, LN, Zhang, S, Zaretskiy, Y, DePaolo, DJ

Publikováno v: Mitnick, EH; Lammers, LN; Zhang, S; Zaretskiy, Y; & DePaolo, DJ. (2018). Authigenic carbonate formation rates in marine sediments and implications for the marine δ13C record. Earth and Planetary Science Letters, 495, 135-145. doi: 10.1016/j.epsl.2018.05.018. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/4628m8gm

© 2018 Elsevier B.V. Carbon isotope (δ13C) variations measured in carbonates have been attributed to large-scale phenomena throughout Earth history, such as changes in atmospheric oxygen or global glaciations. These interpretations follow from a mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______325::fec800dab29451229fbd2db432a3d5f2
http://www.escholarship.org/uc/item/4628m8gm

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Supercritical CO2uptake by nonswelling phyllosilicates

Autor: Wan, J, Tokunaga, TK, Ashby, PD, Kim, Y, Voltolini, M, Gilbert, B, DePaolo, DJ

Publikováno v: Wan, J; Tokunaga, TK; Ashby, PD; Kim, Y; Voltolini, M; Gilbert, B; et al.(2018). Supercritical CO2uptake by nonswelling phyllosilicates. Proceedings of the National Academy of Sciences of the United States of America, 115(5), 873-878. doi: 10.1073/pnas.1710853114. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/27s2g5x2

Interactions between supercritical (sc) CO2and minerals are important when CO2is injected into geologic formations for storage and as working fluids for enhanced oil recovery, hydraulic fracturing, and geothermal energy extraction. It has previously

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______325::2a5f3434eafe0595925a0947d58e55e4
http://www.escholarship.org/uc/item/27s2g5x2

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Global perturbation of the marine calcium cycle during the Permian-Triassic transition

Autor: Silva-Tamayo, JC, Lau, KV, Jost, AB, Payne, JL, Wignall, PB, Newton, RJ, Eisenhauer, A, Depaolo, DJ, Brown, S, Maher, K, Lehrmann, DJ, Altiner, D, Yu, M, Richoz, S, Paytan, A

Publikováno v: Silva-Tamayo, JC; Lau, KV; Jost, AB; Payne, JL; Wignall, PB; Newton, RJ; et al.(2018). Global perturbation of the marine calcium cycle during the Permian-Triassic transition. Bulletin of the Geological Society of America, 130(7-8), 1323-1338. doi: 10.1130/B31818.1. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/5mk4w8rb
Geological Society of America Bulletin, vol 130, iss 7-8
Bulletin of the Geological Society of America, vol 130, iss 7-8

© 2018 The Authors. A negative shift in the calcium isotopic composition of marine carbonate rocks spanning the end-Permian extinction horizon in South China has been used to argue for an ocean acidification event coincident with mass extinction. Th

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The influence of seawater carbonate chemistry, mineralogy, and diagenesis on calcium isotope variations in Lower-Middle Triassic carbonate rocks

Autor: Lau, KV, Maher, K, Brown, ST, Jost, AB, Altıner, D, DePaolo, DJ, Eisenhauer, A, Kelley, BM, Lehrmann, DJ, Paytan, A, Yu, M, Silva-Tamayo, JC, Payne, JL

Publikováno v: Lau, KV; Maher, K; Brown, ST; Jost, AB; Altıner, D; DePaolo, DJ; et al.(2017). The influence of seawater carbonate chemistry, mineralogy, and diagenesis on calcium isotope variations in Lower-Middle Triassic carbonate rocks. Chemical Geology, 471, 13-37. doi: 10.1016/j.chemgeo.2017.09.006. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/6v0262wf

© 2017 Elsevier B.V. The geological calcium cycle is linked to the geological carbon cycle through the weathering and burial of carbonate rocks. As a result, calcium (Ca) isotope ratios (44Ca/40Ca, expressed as δ44/40Ca) can help to constrain ancie

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http://www.escholarship.org/uc/item/6v0262wf

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Additive effects of acidification and mineralogy on calcium isotopes in Triassic/Jurassic boundary limestones

Autor: Jost, AB, Bachan, A, van de Schootbrugge, B, Brown, ST, DePaolo, DJ, Payne, JL

Publikováno v: Geochemistry Geophysics Geosystems, vol 18, iss 1
Geochemistry, Geophysics, Geosystems, vol 18, iss 1
Jost, AB; Bachan, A; van de Schootbrugge, B; Brown, ST; DePaolo, DJ; & Payne, JL. (2017). Additive effects of acidification and mineralogy on calcium isotopes in Triassic/Jurassic boundary limestones. Geochemistry, Geophysics, Geosystems, 18(1), 113-124. doi: 10.1002/2016GC006724. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/4916s0cf

© 2016. American Geophysical Union. All Rights Reserved. The end-Triassic mass extinction coincided with a negative δ13C excursion, consistent with release of13C-depleted CO2from the Central Atlantic Magmatic Province. However, the amount of carbon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::aea81acd8b8581f712fa97fc70c3670a
https://escholarship.org/uc/item/4916s0cf

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Se Isotopes as Groundwater Redox Indicators: Detecting Natural Attenuation of Se at an in Situ Recovery U Mine

Autor: Basu, A, Schilling, K, Brown, ST, Johnson, TM, Christensen, JN, Hartmann, M, Reimus, PW, Heikoop, JM, WoldeGabriel, G, DePaolo, DJ

Publikováno v: Environmental science & technology, vol 50, iss 20
Basu, A; Schilling, K; Brown, ST; Johnson, TM; Christensen, JN; Hartmann, M; et al.(2016). Se Isotopes as Groundwater Redox Indicators: Detecting Natural Attenuation of Se at an in Situ Recovery U Mine. Environmental Science and Technology, 50(20), 10833-10842. doi: 10.1021/acs.est.6b01464. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/2kr0324w

© 2016 American Chemical Society. One of the major ecological concerns associated with the in situ recovery (ISR) of uranium (U) is the environmental release of soluble, toxic selenium (Se) oxyanions generated by mining. Post-mining natural attenuat

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https://escholarship.org/uc/item/2kr0324w

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