Native aluminum as indicator of hydrogen degassing in the formation of hydrocarbon fields
DOI:
https://doi.org/10.24028/gj.v45i1.275130Keywords:
native aluminium, hydrogen fluides, sedimentary rocksAbstract
This work considers the possibility of native aluminum transport with hydrogen fluid, its deposition and preservation in sedimentary rocks, as well as an assessment of the conditions under which this is possible. This problem is currently debatable and is considered in a number of publications. Native aluminum was found in different types of sedimentary rocks of oil-and-gas-bearing basins. So the presence of native aluminum spherulas was established in the dolomites of the Dnipro-Donetsk Basin. By the example of these findings this work shows that the necessary conditions for the formation and long-term preservation of native aluminum are: its migration with the hydrogen flow into the upper layers of the Earth’s crust, the creation of temperature and pressure conditions causing water to vaporize, and the formation of a protective film on the surface of the formed native aluminum. The process of native aluminum formation in the sedimentary rocks of oil-and-gas-bearing deposits of the Dnipro-Donetsk Rift described in this work, as well as its findings in other basins indicates the typical character of this process for rift structures of hydrocarbon accumulation. It was assumed, that the oil-and-gas-bearing structure of Dnipro-Donetsk Rift is mantle origin and represents a giant source of deep hydrogen. Some of this hydrogen is consumed to form hydrocarbon accumulations, including known oil and gas deposits, and some of it degasses into the uppermost layers of the Earth’s crust. Independent hydrogen fields can also form there, as was the case during the formation of the deposit of geological hydrogen in Mali. It was shown, that the presence of hydrocarbons in the fluids does not affect the processes associated with aluminum. The results obtained indicate significant flows of hydrogen from the mantle to the upper horizons of the Earth’s crust. Thus, native aluminum, as well as other native oxyphilic metals in sedimentary rocks of oil-and-gas bearing basins is a search marker of both hydrocarbon accumulations and the important role of deep geological hydrogen in the formation of these accumulations and its possible accumulation in the most reliable traps.
References
Avchenko, O.V., Chudnenko, K.V., & Alexandrov, I.A. (2009). Basics of physical and chemical modeling of mineral systems. Moscow: Nauka, 229 p. (in Russian).
Bajec, D., Grom, M., Lašič Jurković, D., Kostyniuk, A., Huš, M., Grilc, M., Likozar, B., & Pohar, A. (2020). A review of methane activation reactions by halogenation: catalysis, mechanism, kinetics, modeling, and reactors. Processes, 8(4), 443. https://doi.org/10.3390/pr8040443.
Bayrakov, V.V., Vishnevskiy, A.A., & Tishchenko, A.I. (2005). Native aluminum in terrigenous deposits of the Crimea. Dopovidi NAN Ukrayiny, (9), 102—106 (in Russian).
Berndt, M.E., Allen, D.E., & Seyfried, W.E. (1996). Reduction of CO2 during serpentinization of olivine at 300 °C and 500 bar. Geology, 24(4), 351—354. https://doi.org/10.1130/0091-7613(1996)024<0351:ROCDSO>2.3.CO;2.
Bondarenko, V.I., Varlamov, G.B., & Volchin, I.A. (2005). From Fire and Water to Electricity. In I.N. Karp (Ed.), Power Engineering: History, Present and Future (Vol. 1). Kyiv (in Russian).
Chirvinskiy, P.N., & Cherkas, V.K. (1934). On the distribution of masses, pressures and densities in the Earth and its average chemical composition. Trudy Mineralogicheskogo Muzeya AN SSSR, (1), 103—119 (in Russian).
Chen, Z., Huang, C.-Y., Zhao, M., Yan, W., Chien, C.-W., Chen, M., Yang, H., Machiyama, H., & Lin, S. (2011). Characteristics and possible origin of native aluminum in cold seep sediments from the northeastern South China Sea. Journal of Asian Earth Sciences, 40(1), 363—370. https://doi.org/10.1016/j.jseaes. 2010.06.006.
Dekov, V.M., Arnaudov, V., Munnik, F., Boycheva, T.B., & Fiore, S. (2009). Native aluminium: Does it exist? American Mineralogist, 94(8-9), 1283—1286. https://doi.org/10.2138/am.2009. 3236.
Evans, B.W. (2004). The serpentine multisystem revisited: chrysotileis metastable. International Geology Review, 46(6), 479—506. https://doi.org/10.2747/0020-6814.46.6.479.
Febrianto, S., Hastuti, E.P., & Sunaryo, G.R. (2019). Study on Pitting Corrosion of AlMg2 in Solution Containing Chloride. Journal of Physics: Conference Series, 1198, 022061. https://doi.org/10.1088/1742-6596/1198/2/022061.
Foroulis, Z.A., & Thubrikar, M.J. (1975). A Contribution to the Study of the Critical Pitting Potential of Oxide Covered Aluminum in aqueous chloride solutions. Materials and Corrosion, 26(5), 350—355. https://doi.org/10.1002/maco.19750260505.
Frost, B.R., & Beard, J.S. (2007). On silica activity and serpentinization. Journal of Petrology, 48(7), 1351—1368. https://doi.org/10.1093/petrology/egm021.
González-Jiménez, J.M., Piña, R., Saunders, J.E., Plissarte, G., Marchesi, C., Padrón-Navarta, J.A., Ramón-Fernandez, M., Garrido, L.N.F., & Gervilla, F. (2021). Trace element fingerprints of Ni-Fe-S-As minerals in subduction channel serpentinites. Lithos, 400-401, 106432. https://doi.org/10.1016/j.lithos.2021.106432.
Gu, Y., Gammons, C.H., & Bloom, M. (1995). A оne-term extrapolation method for estimating of aqueous reactions at elevated temperatures. Geochimica et Cosmochimica Acta, 58, 3545—3560. https://doi.org/10.1016/0016-7037 (94)90149-X.
Halmann, M., Epstein, M., & Steinfeld, A. (2012). Carbothermic Reduction of Alumina by Natural Gas to Aluminium and Syngas: A Thermodynamic Study. Mineral Processing and Extractive Metallurgy Review, 33(5), 352—361. https://doi.org/10.1080/08827508.2011.601482.
Hasnan, N.S.N., Timmiati, S.N., Lim, K.L., Yaakob, Z., Hidayatul, N., Kamaruddin, N., & The, L.P. (2020). Recent developments in me¬thane decomposition over heterogeneous ca¬talysts: an overview. Mater Renew Sustain Ener¬gy, 9(8). https://doi.org/10.1007/s40243-020-00167-5.
Iyer, S.D., Mascarenhas-Pereira, M.B.L., & Nath, B.N. (2007). Native aluminium (spherules and particles) in the Central Indian Basin sediments: Implications on the occurrence of hydrothermal events. Marine Geology, 240(1-4), 177—184. https://doi.org/10.1016/j.margeo. 2007.02.004.
Janecky, D.R., & Seyfried, W.E. (1986). Hydrothermal serpentinization of peridotite within the oceanic crust: Experimental investigations of mineralogy and major element chemistry. Geochimica et Cosmochimica Acta, 50(7), 1357—1378. https://doi.org/10.1016/0016-7037(86) 90311-X.
Klein, F., Bach, W., Jons, N., McCollom, T., Moskowitz, B., & Berquo, T. (2009). Iron partitioning and hydrogen generation during serpentinization of abyssal peridotites from 15oN on the Mid-Atlantic Ridge. Geochimica et Cosmochimica Acta, 73(22), 6868—6893. https://doi.org/10.1016/j.gca.2009.08.021.
Koliabina, I.L., Sinitsyn, V.A., Shurpach, N.A., & Koliabina, D.A. (2009). Clay minerals in waste isolation technologies: modeling solubility of natural clays and verification of thermodynamic models for solid solutions of ylite and montmorillonite. Heokhimiya ta rudoutvorennya, (27), 124—127 (in Ukrainian).
Kolics, A., Besing, A.S., Baradlai, P., Haasch, R., Wieckowski, A. (2001). Effect of pH on Thickness and Ion Content of the Oxide Film on Aluminum in NaCl Media. Journal of The Electrochemical Society, 148(7), B251. https://doi.org/10.1149/1.1376118.
Kovalskiy, V.V., Oleynikov, O.B., & Mahotko, V.F. (1981). Native metals and intermetallic compounds in kimberlite rocks of Yakutia. In Native mineral formation in the magmatic process: Abstracts of papers (pp. 105—111). Yakutsk (in Russian).
Kulongoski, J.T., McMahon, P.B., Land, M., Wright, M.T., Johnson, T.A., & Landon, M.K. (2018). Origin of methane and sources of high concentrations in Los Angeles groundwater. Journal of Geophysical Research: Biogeosciences, 123, 818—831. https://doi.org/10.1002/ 2017JG004026.
Kupenko, V.I., & Osadchiy, E.G. (1981). Native aluminium in ores of Nikitovskoye ore deposit. In Native mineral formation in the magmatic process: Abstracts of papers (pp. 87—90) Yakutsk (in Russian).
Larin, N., Zgonnik, V., Rodina, S., Deville, E., Prinzhoferm, A., & Larin, V.N. (2015). Natural Molecular Hydrogen Seepage Associated with Surficial, Rounded Depressions on the European Craton in Russia. Natural Resources Research, 24, 369—383. https://doi.org/10.1007/s11053-014-9257-5.
Leong, J.M., Ely, T., & Shock, E.L. (2021a). Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere. Nature Communications, 12, 7341. https://doi.org/10.1038/s41467-021-27589-7.
Leong, J.M., Howells, A.H., Robinson, K.J., Cox, A., Debes, R.V., Fecteau, K., Prapaipong, P., & Shock, E.L. (2021b). Theoretical Predictions Versus Environmental Observations on Serpentinization Fluids: Lessons From the Samail Ophiolite in Oman. Journal of Geophysical Research: Solid Earth, 126(4), e2020JB020756. https://doi.org/10.1029/2020JB020756.
Leong, J.M., Howells, A.H., Robinson, K.J., & Shock, E.L. (2018). Thermodynamic Predictions vs. Measured Fluid Chemistry: Lessons from Low-Temperature, Serpentinizing Fluids. Ocean Worlds, Abstract 6025. LPI Contribution No. 2085, Lunar and Planetary Institute, Houston.
Leong, J.M., & Shock, E.L. (2020). Thermodynamic constraints on the geochemistry of low-temperature, continental, serpentinization-generated fluids. American Journal of Science, 320(3), 185—235. https://doi.org/10.2475/03.2020.01.
Lepigov, G., Gulii, V., Lyzanets, A., & Tsyokha, O. (2011). Structure and gas content of the Shebelinsky deposit (in the light of the theory of abiogenic genesis of hydrocarbons). Geologist of Ukraine, (3-4), 48—52 (in Ukrainian).
Li, M., Xie, D.G., Ma, E., Li, J., Zhang, X.-X., Shan, Z.-W. (2017). Effect of hydrogen on the integrity of aluminium—oxide interface at elevated temperatures. Nature Communications, 8, 14564. https://doi.org/10.1038/ncomms14564.
Li, W., Cochell, T., & Manthiram, A. (2013). Activation of Aluminum as an Effective Reducing Agent by Pitting Corrosion for Wet-chemical Synthesis. Scientific Reports, 3, 1229. https://doi.org/10.1038/srep01229.
Lukin, A.E. (1997). Lithogeodynamic factors of oil and gas accumulation in aulacogen basins. Kiev: Naukova Dumka (in Russian).
Lukin, A.E. (2008). Native aluminum in oil and gas collectors. Dopovidi NAN Ukrayiny, (12), 100—107.
Lukin, A.E. (2004). On cross-formational fluid-conducting systems in oil-and-gas basins. Geologichnyy Zhurnal, (3), 34—45 (in Russian).
Lukin, A.E., Gafich, I.P., Goncharov, G.G., Makogon, V.V., & Prigarina, T.M. (2020). Hydrocarbon potential of subsoil in Ukraine and the principal ways of its development. Mineral'ni resursy Ukrayiny, (4), 28—38 (in Ukrainian).
Lukin, A., Savinykh, Yu., & Dontsov, V. (2007). On the native metals in oil-and-gas-bearing crystalline rocks of the White Tiger Field (Vietnam). Geologist of Ukraine, (2), 30—42.
Lukin, A.E., & Shestopalov, V.M. (2021). Tectono-magmatogene ring structures in zones of increased geodynamic instability as priority objects for exploration of hydrogen fields. Geofizicheskiy Zhurnal, 43(4), 3—41 (in Russian). https://doi.org/10.24028/gzh.v43i4.239953.
Marshintsev, V.K., Barashkov, Yu.P., & Leskova, N.V. (1981). Native elements in olivine from kimberlites. In Native mineral formation in the magmatic process: Abstracts of papers (pp. 103—105). Yakutsk (in Russian).
McCafferty, E. (2003). Sequence of steps in the pitting of aluminum by chloride ions. Corrosion Science, 45(7), 1421—1438. https://doi.org/10.1016/S0010-938X(02)00231-7.
McCollom, T.M., & Bach, W. (2009). Thermodynamic constraints on hydrogen generation during serpentinization of ultramafic rocks. Geochimica et Cosmochimica Acta, 73(3), 856—875. https://doi.org/10.1016/j.gca.2008.10.032.
McCollom, T.M., Klein, F., Robbins, M., Moskowitz, B., Berquó, T.S., Jöns, N., Bach, W., & Templeton, A. (2016). Temperature trends for reaction rates, hydrogen generation, and partitioning of iron during experimental serpentinization of olivine. Geochimica et Cosmochimica Acta, 181(15), 175—200. https://doi.org/10.1016/j.gca.2016.03.002.
McCollom, T.M., Klein, F., Solheid, P., & Moskowitz, B. (2020). The effect of pH on rates of reaction and hydrogen generation during serpentinization. Philosophical Transactions of the Royal Society A, Mathematical, Physical, and Engineering Sciences, 378(2165), 20180428. https://doi.org/10.1098/rsta.2018.0428.
Moody, J.B. (1976). Serpentinization: a review. Lithos, 9(2), 125—138. https://doi.org/10.1016/0024-4937(76)90030-X.
Naeini, M.F., Shariat, M.H., & Eizadjou, M. (2011). On the chloride-induced pitting of ultra fine grains 5052 aluminum alloy produced by accumulative roll bonding process. Journal of Alloys and Compounds, 509(14), 4696—4700. https://doi.org/10.1016/j.jallcom.2011.01.066.
Naumov, B.N., Ryzhenko, N.A., & Khodakovsky, G.B. (1971). Handbook of thermodynamic parameters. Moscow: Atomizdat, 240 p. (in Russian).
Nivin, V.A. (2016). Free hydrogen-hydrocarbon gases from the Lovozero loparite deposit (Kola Peninsula, NW Russia). Applied Geochemistry, 74, 44—55. https://doi.org/10.1016/j.apgeochem.2016.09.003.
Novgorodova, M.I. (1979). Findings of native aluminum in quartz veins. Doklady AN SSSR, 248(4), 965—968 (in Russian).
Novgorodova, M.I. (1983). Native metals in hydrothermal ores. Moscow: Nauka (in Russian).
Novgorodova, M.I., & Mamedov, Yu.G. (1996). Native aluminum from mud volcano on the Bulla Island (Caspian Sea). Geologiya i poleznyye iskopayemyye, (4), 339—349 (in Russian).
Oleynikov, B.V., Okrugin, A.V., & Leskova, N.V. (1978). Petrological significance of the occurrence of native aluminum in basites. Doklady AN SSSR, 243(1), 425—432 (in Russian).
Oleynikov, О.B., Vasiliev, Yu.R., & Makhotko, V.F. (1981). Native metals and natural alloys in picritic porphyrite from the northern part of Siberian Platform. In Native mineral formation in the magmatic process: Abstracts of papers (pp. 111—1141). Yakutsk (in Russian).
Olsen, E. (1963). Equilibrium calculations in the system Mg, Fe, Si,O, H, and Ni. American Journal of Science, 261, 943—956. https://doi.org/10.2475/ajs.261.10.943.
Othmer, D.F. (1974). Method for producing aluminum metal directly from ore. US Patent 3,793,003.
Paar, W.H., Ma, C., Topa, D., Culetto, F.J., Hammer, V.F.M., Guan, Y., & Braithwaite, R.S.W. (2019). Discovery of native aluminum on Variscan metagranitoids in Upper Carinthia, Austria: natural or anthropogenic origin? Rendiconti Lincei. Scienze Fisiche e Naturali, 30, 167—184. https://doi.org/10.1007/s12210-019-00760-5.
Palandri, J.L., & Reed, M.H. (2004). Geochemical models of metasomatism in ultramaflc systems: serpentinization, rodingitization, and sea floor carbonate chimney precipitation. Geochimica et Cosmochimica Acta, 68(5), 1115—1133. https://doi.org/10.1016/j.gca.2003.08.006.
Peng, C., Liu, Y.-W., Guo, M.-X., Gu, T.-Z., Wang, C., Wang, Z.-Y., & Sun, C. (2022). Corrosion and pitting behavior of pure aluminum 1060 exposed to Nansha Islands tropical marine atmosphere. Transactions of Nonferrous Metals Society of China, 32(2), 448—460. https://doi.org/10.1016/S1003-6326(22)65806-0.
Peretti, A., Dubessy, J., Mullis, J.B., Frost, R., & Trommsdorff, V. (1992). Highly reducing conditions during Alpine metamorphism of the Malenco peridotite (Sondrio, northern Italy) indicated by mineral paragenesis and H2 in fluid inclusions. Contributions to Mineralogy and Petrology, 112, 329—340. https://doi.org/10.1007/BF00310464.
Petrasch, J. (2002). Thermal modeling of solar chemical reactors. MSc. Thesis. ETH Zurich Swiss Federal Institute of Technology.
Porciúncula, C.B., Marcilio, N.R., Tessaro, I.C., & Gerchmann, M. (2012). Production of hydrogen in the reaction between aluminium and water in the presence of NaOH and KOH. Brazilian Journal of Chemical Engineering, 29(2), 337—48. https://doi.org/10.1590/S0104-66322012000200014.
Prinzhofer, A., Cissё, C.S.T., & Diallo, A.B. (2018). Discovery of a large accumulation of natural hydrogen in Bourakebougou (Mali). Interna¬tio¬nal Journal of Hydrogen Energy, 43(42), 19315—19326. https://doi.org/10.1016/j.ijhydene.2018.08.193.
Prinzhofer, A., Moretti, I., Francolin, J., Pacheco, C., d’Agostino, A., Werly, J., & Rupin, F. (2019). Natural hydrogen continuous emission from sedimentary basins: The example of a Brazilian H2-emitting structure. International Journal of Hydrogen Energy, 44(12), 5676—5685. https://doi.org/10.1016/j.ijhydene.2019.01.119.
Rains, R.K., & Kadlec, R.H. (1970). The reduction of Al2O3 to aluminium in a plasma. Metallurgical Transactions, 1(6), 1501—1506. https://doi.org/10.1007/BF02641992.
Saranchuk, V.I., Ilyashov, M.O., Oshovskiy, V.V., & Beletsky, V.S. (2008). Basics of chemistry and physics of fossil fuels. (Textbook with the stamp of the Ministry of Higher Education). Donetsk: Skhidnyy vydavnychyy dim, 638 p. (in Ukrainian).
Shestopalov, V.M., Koliabina, I.L., Ponomarenko, O.M., Lukin, A.E., & Rud, A.D. (2022). Thermodynamic assessment of the possibility of olivine interaction with deep-seated hydrogen. International Journal of Hydrogen Energy, 47(11), 7062—7071. https://doi.org/10.1016/j.ijhydene.2021.02.152.
Shnyukov, E.F., & Lukin, A.E. (2011). On native elements in various geoformations of the Crimea and adjacent regions. Geologiya i poleznye iskopayemye Mirovogo okeana, (2), 5—30 (in Russian).
Shestopalov, V.M., Lukin, A.Ye., Zgonnik, V.A., Makarenko, A.N., Larin, N.V., & Boguslavskiy, A.S. (2018). Essays on the Earth Degassing. Kiev, 632 p. (in Russian).
Shnyukov, E.F., Sobolevskiy, Yu.V., & Kutnyi, V.A. (1993). Genetic features of manganese-ore and phosphate mineralization in Barakol basin (Eastern Crimean Mountains). Geologichnyy Zhurnal, (1), 3—9 (in Russian).
Shock, E.L., & Helgeson, H.C. (1988). Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: correlation algorithms for ionic species and equation of state predictions to 5 kb and 1000 °C. Geochimica et Cosmochimica Acta, 52, 2009—2036. https://doi.org/10.1016/0016-7037(88)90181-0.
Shock, E.L., Sassani, D.C., Willis, M., & Sverjensky, D.A. (1997). Inorganic species in geologic fluids: Correlations among standard molal thermodynamic properties of aqueous ions, hydroxide complexes. Geochimica et Cosmochimica Acta, 61, 907—950. https://doi.org/10.1016/S0016-7037(96)00339-0.
Shterenberg, L.E., Kuzmina, O.V., Laputina, I.P., & Tsepin, A.I. (1986). On finding of native aluminium associated with ZnO and ZnCl2 in sediments, site 647 (northeastern Pacific). Litologiya i poleznye iskopayemye, (1), 137—140 (in Russian).
Shterenberg, L.E., & Vasilieva, G.L. (1979). Native metals and intermetallic compounds in sediments of the northeastern Pacific. Litologiya i poleznye iskopayemye, (2), 185—191 (in Russian).
Shterenberg, L.E., Voronin, B.I., & Stepanov, S.S. (1988). Partially oxidized native aluminium in sediments of the northeastern Pacific. Byulleten’ komissii po izucheniyu chetvertichnogo perioda, 57, 110—116 (in Russian).
Silaev, V.I., Karpov, G.A., Anikin, L.P., Filippov, V.N., Petrovsky, V.A., Sukharev, A.E. & Simakova, Yu.S. (2017). The first discovery of natural duralumin. Doklady Earth Sciences, 476, 1048—1053. https://doi.org/10.1134/S1028334X17090082.
Sleep, N.H., Meibom, A., Fridrikssonm, Th., Coleman, R.G., & Bird, D.K. (2004). H2-rich fluids from serpentinization: geochemical and biotic implications. Proceedings of the National Academy of Sciences, 101(35), 12818—12823. https://doi.org/10.1073/pnas.0405289101.
Smith, I.E. (1972). Hydrogen generation by means of the aluminium/water reaction. Journal of Hydronautics, 6(2), 106—109. https://doi.org/10.2514/3.48127.
Vijh, A. (1988). The pitting corrosion potentials of metals and surface alloys in relation to their solid state cohesion. Materials Chemistry and Physics, 20(4-5), 371—380. https://doi.org/10.1016/0254-0584(88)90075-2.
Wang, H.Z., Leung, D.Y.C., Leung, M.K.H., & Ni? M. (2009). A review on hydrogen production using aluminum and aluminum alloys. Renewable and Sustainable Energy Reviews, 13(4), 845—853, https://doi.org/10.1016/j.rser.2008.02.009.
Wetzel, L.R., & Shock, E.J. (2000). Distinguishing ultramafic from basalt-hosted submarine hydrothermal systems by comparing calculated vent fluid compositions. Journal of Geophysical Research, 105(B4), 8319—8340. https://doi.org/10.1029/1999JB900382.
Yu, S.Y., O’Grady, W.E., Ramaker, D.E., & Natishan, P.M. (2000). Chloride Ingress into Aluminum Prior to Pitting Corrosion an Investigation by XANES and XPS. Journal of the Electrochemical Society, 147, 2952. https://doi.org/10.1149/1.1393630.
Zucchetti, S., Mastrangelo, F., Rossetti, P., & Sandrone, R. (1988). Serpentinization and metamorphism: their relationships with metallogeny in some ophiolitic ultramafics from the Alps. Zuffar’ Days — Symposium in Honor of Piero Zuffardi. University of Cagliary, Cagliary (Italy), October 10—15 (Vol. 1, pp. 137—159).
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