Abstract
Copper-rich deposits associated with magmatism at the Oued Belif -Ain El Araar area in North-western Tunisia fit into the geodynamic framework of the Tell-Rif orogenic belt of North Africa that extends westward to the Betic Cordilleras in Spain at the african and european plate boundary. The deposits have been considerably studied. However, the prevailing conditions of pressure, volume, temperature and composition (P-V-T-X) of the mineralizing fluids are still elusive. In this study, three types of fluid inclusions were distinguished for the mineralized facies: primary polyphase brine inclusions (Type I: liquid + vapor + halite + sylvite), primary sylvite (Type II-a: liquid + vapor + sylvite) and halite (Type II-b: liquid + vapor + halite) bearing inclusions and biphasic secondary vapor-rich and liquid-rich inclusions (Type III: liquid + vapor). Raman spectroscopy show that Type I and II a-b inclusions are in the CO2–H2O–NaCl–KCl, CO2–H2O–NaCl and CO2–H2O–KCl systems, whereas Type III pertains to the CO2–H2O system. Estimations of Pressure-Temperature fluid trap** conditions, for all mentioned inclusions, demonstrate a physicochemical fluid evolution from the highest temperature brine inclusions (Tt = 500°C; Pt = 980 bars), related to the porphyry phase, to the low temperature biphasic inclusions (Tt = 131°C; Pt = 221 bars) related the latest epithermal phase .The coexistence of liquid-rich and vapor-rich inclusions homogenizing at lower temperatures, confirms the establishment of boiling conditions responsible of Au–(Ag) enrichment in the last mineralizing phases. Comparable temperature conditions in similar magmatic related deposits are also mentioned in southern Spain (Rodalquilar gold mine, e.g., Arribas et al., 1995) where the mineralizing fluid temperatures mentioned vary from 175°C for epithermal deposits to more than 400°C for porphyry ones. The geochemical behavior of trace element indicates positive anomalies in mobile elements (hygromagmaphiles), those linked to Au, granitophiles (mainly W and Mo) and chalcophiles indicating a supply of metals of deep origin and mineralizing fluids with marked magmatic differentiation.
REFERENCES
Abidi, R., Slim-Shimi, N., Somarin, A., and Henchiri, M., Mineralogy and fluid inclusions study of carbonate-hosted Mississipi Valley type Ain Allega Pb–Zn–Sr–Ba ore deposit, Northern Tunisia, J. Afr. Earth Sci., 2010, vol. 57, pp. 262–272. https://doi.org/10.1016/j.jafrearsci.2009.08.006
Albidon Limited, Exploration report, Develo** the East Africa nickel district, 2007. http://minesite.com/fileadmin/content/pdfs/Brokers_Notes_2/ALB_040507.pdf.
Argani, A., Cornini, S., Torelli, L., and Zitellini, N., Neogene–Quaternary foredeep system in the strait of Sicily, Mem. Soc. Geol. Ital. 1986, vol. 36, pp. 123– 130
Argnani, A., The Strait of Sicily rift zone: foreland basin deformation related to the evolution of a back-arc basin, J. Geol., 1990, vol. 12, pp. 311–331. https://doi.org/10.1016/0264-3707(90)90028-S
Arribas, A., Cunningham, C.G., Rytuba, J.J., Rye, R.O., Kelly, W.C., Podwysocki, M.H., McKee, E.H., and Tosdal, R.M., Geology, geochronology, fluid inclusions, and isotope geochemistry of the Rodalquilar gold alunite deposit, Spain, Econ. Geol., 1995, vol. 90, no. 4, pp. 795–822. https://doi.org/10.2113/gsecongeo.90.4.795
Badgasarian, G.P., Bajanik, S., and Vass, D., Age radio-métrique du volcanisme néogène du Nord de la Tunisie, Not. Serv. Géol. Tunisie, 1972, vol. 40, pp. 79–85.
Bakker, R., Package FLUIDS: 1. Computer programs for analysis of fluid inclusion data and for modelling bulk fluid properties, Chem. Geol. 2003, vol. 194, pp.3–23. https://doi.org/10.1016/S0009-2541(02)00268-1
Bakker, R.J., Package FLUIDS. Part 4: thermodynamic modeling and purely empirical equations for H2O–NaCl–KCl solutions, Mineral. Petrol., 2012. https://doi.org/10.1007/s00710-012-0192-z
Barnes, H.L., Solubility of ore minerals. In: Geochemistry of Hydrothermal Ore Deposits, Barnes, H.L., Ed., New York: John Wiley & Sons, 1979, pp. 404–460.
Ben Aïssa, L., Alouani, R., and Ben Aïssa, W., Tectono-magmatic events and genesis of Fe-Pb-Zn resources in Nefza area, NW Tunisia, Arab. J. Geosci., 2018, vol. 11, p. 608. ttps://doi.org/https://doi.org/10.1007/s12517-018-3910-y
Ben Aïssa, W., Ben Aïssa, L., Ben Haj, Amara., Tlig, S., and Alouani, R., Ore deposits and epithermal evidences associated with intramagmatic faults at Aïn El Araâr-Oued Belif ring structure (NW Tunisia), Int. J. Earth Sci. (Geol. Rundsch.), 2017, vol. 106, pp.2653–2665. https://doi.org/10.1007/s00531-017-1451-3
Ben Aissa, L., Ben Aissa, W., Ben Aissa, R., Alouani, R., and Ben Haj, Amara., Post-magmatic hydrothermal and metasomatic activity within associated skarn deposits: neoformation of iron-fluorphlogopite minerals first reported in NW Tunisia, Oued Belif area, Arab. J. Geosci., 2020, vol. 13, 300. https://doi.org/10.1007/s12517-020-5272-5
Beji Sassi, A., Laridhi-Ouazaa, N., and Clocchiatti, R., Les inclusions vitreuses des ilménites, apatites et quartz des sédiments phosphatés de Tunisie: témoignages d’un volcanisme alcalin d’âge paléocène supérieur à Éocène, Bull. Soc. Géol. France, 1996, vol. 167, no. 2, pp. 227–234.
Boccaletti, M. and Guazzone, G., Remnant arcs and marginal basins in the Cenozoic development of the Mediterranean, Nature, 1974, vol. 252, pp. 18–21. https://doi.org/10.1038/252018a0
Bodnar, R.J., Revised equation and table for determining the freezing point depression of H2O–NaCl solutions, Geochim. Cosmochim. Acta, 1993, vol. 57, pp. 683–684. https://doi.org/10.1016/0016-7037(93)90378-A
Borisenko, A.S., Study of the salt composition of solutions in gas-liquid inclusions in minerals by the cryometric method, Soviet Geology and Geophysics, 1977, vol. 18, pp. 11–19
Burke, E.A.J., Raman microspectrometry of fluid inclusions, Lithos, 2001, vol. 55, pp. 139–158. https://doi.org/10.1016/S0024-4937(00)00043-8
Candela, P.A. and Piccoli, P.M., Model ore-metal partitioning from melts into vapor and vapor/brine mixtures, Mineral. Ass. Canada, Short Course Ser., 1995, vol. 23, pp. 101–127
Cline, J. and Bodnar, R.J., Direct evolution of brine from a crystallizing silicic melt at the Questa, New Mexico, Molybdenum deposit, Econ. Geol., 1994, vol. 89, pp. 1780–1802
Cline, J.S., Genesis of porphyry copper deposits: The behavior of water, chloride, and copper in crystallizing melts, Arizona Geological Society Digest, 1995, vol. 20, pp. 69–82
Clochiatti, R. and El Ghozzi, T., Les inclusions à dépôts salins des cristaux de quartz de la granodiorite quartzique de l’Oued Bélif (groupe volcanique de Nefza, Tunisie septentrionale), CR. Acad. Sci. Paris, 1977, p. 284.
Cohen, C.R., Schamel, S., and Boyd-Kaygi, P., Neogene deformation in Northern Tunisia: origin of the Eastern Atlas by microplate continental margin collision, Geol. Soc. Am. Bull., 1980, vol. 91, no. 4, pp. 225–237.
Colleuil, B., Etude Stratigraphique et Néotectonique des Dormations Néogenes et Quaternaires de la Région de Nabeul-Hammamet (Cap-Bon Tunisia), Mem. D.E.S. Univ., Nice, France, 1976.
Crampon, N., Etude Géologique de la Bordure des Mogods du Pays de Bizerte et du Nord des Hédils (Tunisie septentrionale), PhD thesis, Nancy 1-University, 1971.
Crawford, M.L., Phase equilibria in aqueous fluid inclusions. In Fluid Inclusions: Applications to Petrology, (Hollister, L.S., and Crawford, M.L., Eds., Mineral. Assoc. Can., Short Course Handbook, 1981, vol. 6, pp. 75–100.
Decrée, S., De Putter, Th., and Baele, J.M., The Oued Belif hematiterich breccia: a Miocene iron oxide Cu–Au (U–REE) deposit in the Nefza Mining District, Tunisia, Econ. Geol., 2013, vol. 108, pp.1425–1457. https://doi.org/10.2113/econgeo.108.6.1425
De Vivo, B. and Frezzotti, M.L., Evidence for magmatic immiscibility in italian subvolcanic systems. In: Fluid Inclusions in Minerals: Methods and Applications, Blacksburg: Virginia Tech (VT), 1994, pp. 345–362.
Dewey, J.E., Helman, M.L., Turco, E., Hutton, D.H.W., Knott, D., Kinematics of the western Mediterranean, In: Alpine Tectonics, Coward, M.P, Dietrich, D., and Park, R.G., Eds., Geol. Soc. Spec. Publ., 1989, vol. 45, pp. 265–284. https://doi.org/10.1144/GSL.SP.1989.045.01.15.
Dilles, J.H., Solomon, G.C., Taylor, Jr., H.P., and Einaudi, M.T., Oxygen and hydrogen isotopic characteristics of hydrothermal alteration at the Ann-Mason porphyry copper deposit, Yerington, Nevada, Econ. Geol., 1992, vol. 87, pp. 44–63.
Durand-Delga, M., Méditerranée occidentale, étapes de sa genèse et problèmes structuraux liés à celle-ci, Mém. Soc. Géol. Fr., 1980, vol. 10, pp. 203–224.
Faul, H. and Foland, K., L'âge des rhyodacites de Nefza-Sedjenane, Notes du Service Géologique de Tunisie n°46. Trav. Géol. Tunis. 1980, vol. 14, pp. 47–49.
Frezzotti, M.L., Tecce, F., and Casagli, A., Raman spectroscopy for fluid inclusion analysis, J. Geochem. Explor., 2012, vol. 112, pp. 1–20. https://doi.org/10.1016/j.gexplo.2011.09.009
Gottis, C. and Sainfeld, P., Les gites métallifères tunisiens, XIX éme Congrés Géologique International, Monographies régionales, 1952, 2e sér., Tunisie. N° 2, p. 104. https://www.sudoc.fr/025353640
Harris, A.C. and Golding, S.D., New evidence of magmatic-fluid related phyllic alteration: implications for the genesis of porphyry copper deposits, Geology, 2002, vol. 30, pp. 335–338. https://doi.org/10.1130/0091-7613(2002)030<0335:NEO-MFR>2.0.CO;2
Harris, A.H., Golding, S.D., and White, N.C., Bajo de la Alumbrera copper–gold deposit: stable isotope evidence for a porphyry-related hydrothermal system dominated by magmatic aqueous fluids, Econ. Geol., 2005, vol. 100, pp. 863–886. https://doi.org/10.2113/gsecongeo.100.5.863
Henley, R.W. and McNabb, A., Magmatic vapor plumes and groundwater interaction in porphyry copper emplacement, Econ. Geol., 1978, vol. 73, pp. 1–20. https://doi.org/10.2113/gsecongeo.73.1.1
Hezarkhani, A. and Williams-Jones, A., Controls of alteration and mineralization in the Sungun porphyry copper deposit, Iran: evidence from fluid inclusion and stable isotope, Econ. Geol., 1998, vol. 93, pp. 651–670. https://doi.org/10.2113/gsecongeo.93.5.651
Hezarkhani, A., Williams-Jones, A.E., and Gammons, C.H., Factors controlling copper solubility and chalcopyrite deposition in the Sungun porphyry copper deposit, Iran, Miner. Deposita, 1999, vol. 34, pp. 770–783. https://doi.org/10.1007/s001260050237
Hou, Z.Q., Ma, H.W., Zaw, K., Zhang, Y.Q., Wang, M.J., Wang, Z., Pan, G.T., and Tang, R., The Himalayan Yulong porphyry copper belt: product of large-scale strike-slip faulting in Eastern Tibet, Econ. Geol., 2003, vol. 98, pp. 125–145. https://doi.org/10.2113/98.1.125
Jallouli, C., Mickusk, K., Turki, M.N., and Rihane, C., Gravity and aeromagnetic constraints on the extent of Cenozoic rocks within the Nefza–Tabarka region, northwestern Tunisia, J. Volcanol. Geotherm. Res., 2003, vol. 122, pp. 51–68. https://doi.org/10.1016/S0377-0273(02)00469-9
Kilinc, I.A. and Burnham, C.W., Partitioning of chloride between a silicate melt and coexisting aqueous phase from 2 to 8 kilobars, Econ. Geol., 1972, vol. 67, pp. 231–235. https://doi.org/10.2113/gsecongeo.67.2.231
Linke, W.F., Solubilities, Inorganic and Metal Organic Compounds: a Compilation of Solubility Data from the Periodical Literature, Princeton: Van Nostrand, 1958.
Lowenstern, J.B., Dissolved volatile concentrations in an ore-forming magma, Geology, 1994, vol. 22, pp. 893-896. https://doi.org/10.1130/0091-7613(1994)022<0893:DVCI-AO>2.3.CO;2
Lyubetskaya, T. and Korenaya, J., Chemical composition of earth’s primitive mantle and its variance: 1. Methods and results, J. Geophys. Res., Solid Earth, 2007, vol. 112, no. B3, pp. 1–21. https://doi.org/10.1029/2005JB004223
Mauduit, F., Le Volcanisme Neogene de la Tunisie Continentale, Unpublished Thesis, Paris: Universite de Paris Sud, 1978.
Negra, L., Pétrologie, minéralogie et géochimie des minéralisations et des roches encaissantes des bassins associés aux structures tectoniques et magmatiques de l’Oued Bélif et du Jebel Hedada (nord des Nefza, Tunisie septentrionale). Thèse, Paris : Univ. Paris-Sud, Orsay, 1987, http://www.theses.fr/1987PA112253
Philip, H., Andrieux, J., Dlala, M., Chihi, L., and Ben Ayed, N., Evolution tectonique mioplioquaternaire du fossé de Kasserine (Tunisie centrale): implications sur l’evolution géodynamique recente de la Tunisie, Bull. Scoc. Geol. France, 1986, vol. 4, pp. 559–568. https://doi.org/10.2113/gssgfbull.ii.4.559
Sanger-von Oepen, P., Frieflrich, G., and Vogt, J.H., Fluid evolution, wallrock alteration and ore mineralization associated with the Rodalquilar epithermal gold-deposit in southeast Spain, Miner. Deposita, 1989, vol. 24, pp. 235–243. https://doi.org/10.1007/BF00206385
Quan, R.A., Cloke, P.L., and Kesler, S.E., Chemical analyses of halite trend inclusions from the Granite porphyry copper deposit, British Columbia, Econ. Geol., 1987, vol. 82, pp. 1912–1930
Rehault, J.P., Boillot, G., and Mauffret, A., The western Mediterranean basin geological evolution. Mar. Geol., 1984, vol. 55, pp. 447–477. https://doi.org/10.1016/0025-3227(84)90081-1
Reynolds, T.J. and Beane, R.E., Evolution of hydrothermal fluid characteristics at the Santa Rita, New Mexico, porphyry copper deposit, Econ. Geol., 1985, vol. 80, pp. 1328–1347. https://doi.org/10.2113/GSECONGEO.80.5.1328
Roedder, E., Fluid Inclusions, Rev. Mineral., 1984, vol. 12
Ronald, J., Bakker, Package FLUIDS 1. Computer programs for analysis of fluid inclusion data and for modelling bulk fluid properties, Chem. Geol., 2003, vol. 194, 3– 23. https://doi.org/10.1016/S0009-2541(02)00268-1
Rouvier, H., Carte Géologique de la Tunisie, Feuille n°10 (Nefza-1/50000), Tunisian Office for Topography and Cartographie, 1987.
Rytuba, J.J., Arribas, A.Jr., Cunningham, C.G., Mckee, E.H., Podwysocki, M.H., Smith, J.G., Kelly, W.C., and Arribas, A., Mineralized and unmineralized calderas in Spain; Part II, evolution of the Rodalquilar caldera complex and associated gold-alunite deposit, Miner. Deposita, 1990, vol. 25 (Suppl.): S29–S35. https://doi.org/10.1007/BF00205247
Slim-Shimi, N., Tlig, S., and Zargouni, F., Nature, origine et évolution des fluides dans le district minier de la caldeira d’Oued Bélif (Nefza, Tunisie septentrionale), CR Acad Sci., 1999, vol. 328, pp. 153–160. https://doi.org/10.1016/S1251-8050(99)80090-1
Sterner, S.M., Hall, D.L., and Bodnar, R.J., Synthetic fluid inclusions. V. Solubility relations in the system NaCl–KCl–H2O under vapor-saturated conditions, Geochim. Cosmochim. Acta, 1988, vol. 52, no. 5, pp. 989–1005. https://doi.org/10.1016/0016-7037(88)90254-2
Talbi, F., Jaafari, M., and Tlig, S., Magmatisme néogène de la Tunisie septentrionale : pétrogenèse et événements géodynamiques, Rev. Soc. Geol. Espania, 2005, vol. 18, pp. 241–252.
Tlig, S., Erraoui, L., Ben Aissa, L., Alouani, R., and Tagorti, M.A., Tectogenèses alpine et atlasique : deux événements distincts dans l’histoire géologique de la Tunisie Corrélation avec les événements clés en Méditerranee, Compt. Rend. l’Acad. Sci. Paris, 1991, vol. 312 (Sér. II), pp. 295–301.
Ulrich, T. and Heinrich, C.A., Geology and alteration geochemistry of the porphyry Cu–Au deposit at Bajo de la Alumbrera, Argentina, Econ. Geol., 2001, vol. 96, pp. 1719–1742. https://doi.org/10.2113/gsecongeo.97.8.1865
Ulrich, T., Günthur, D., and Heinrich, C.A., The evolution of a porphyry Cu-Au deposit, based on LA-ICP-MS analysis of fluid inclusions: Bajo de la Alumbrera, Argentina, Econ. Geol., 2001, p. 96, pp. 1743–1774. https://doi.org/10.2113/gsecongeo.97.8.1889
Vitale, S., Ciarcia, S., and Tramparulo, F.D., 'A., Deformation and stratigraphic evolution of the Ligurian Accretionary Complex in the southern Apennines (Italy), J. Geodynam., 2013, vol. 66, pp. 120–133. https://doi.org/10.1016/j.jog.2013.02.008
Winnock, E., Les fosses du chenal de Sicile. La Mer Pélagienne, Geol. Mediterr., 1979, vol. 6, no. 1, pp. 35–40.
Zhang, Y.G. and Frantz, J.D., Determination of the homogenization temperatures and densities of supercritical fluids in the system NaCl–KCl–CaCl2–H2O using synthetic fluid inclusions, Chem. Geol., 1987, vol. 64, pp. 335–350. https://doi.org/10.1016/0009-2541(87)90012-X
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This article is released within the framework of the scientific cooperation between the University of Carthage (Tunisia) and the University of Claude Bernard Lyon 1 (France). We would like to thank the Research Unit of Physics of Lamellar Materials and Hybrid Nanomaterials of the Faculty of Sciences of Bizerta for the financing of the geochemical and Raman analyzes and the Geology Laboratory of Lyon for the assistance of the microthermometric measurements.
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Ben Aissa Wiem, Véronique, G., Ben Aissa Rania et al. Geochemistry and P-T Conditions of Hydrothermal Fluids Associated with Porphyry, Metasomatic and Epithermal Ore Deposits at Oued Belif-Ain El Araar Magmatic Structure (North-African Alpine Orogeny, Tunisia). Geol. Ore Deposits 65, 625–643 (2023). https://doi.org/10.1134/S1075701523060028
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DOI: https://doi.org/10.1134/S1075701523060028