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Fluid circulation in the Apuane Alps core complex: evidence from extension veins in the Carrara marble

Published online by Cambridge University Press:  05 July 2018

P. Costagliola ,
M. Benvenuti ,
C. Maineri ,
P. Lattanzi  and
G. Ruggieri
P. Costagliola
Affiliation:
Museo di Mineralogia e Litologia, Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy
M. Benvenuti
Affiliation:
Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy CNR C.S. Minerogenesi e Geochimica Applicata, Via La Pira 4, I-50121, Firenze, Italy
C. Maineri
Affiliation:
Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy CNR C.S. Minerogenesi e Geochimica Applicata, Via La Pira 4, I-50121, Firenze, Italy
P. Lattanzi
Affiliation:
CNR C.S. Minerogenesi e Geochimica Applicata, Via La Pira 4, I-50121, Firenze, Italy Dipartimento di Scienze della Terra, Università di Cagliari, via Trentino 51, I-09127, Cagliari, Italy
G. Ruggieri
Affiliation:
CNR, Istituto Internazionale per le Ricerche Geotermiche, Piazza Solferino 2, I-56126, Pisa, Italy
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Abstract

In the Apuane Alps (AA) metamorphic core complex, syn-metamorphic mineral deposits are mainly restricted to extensional shear zones in the Lower Plate Palaeozoic basement. By contrast, the extension structures at upper levels, such as the detachment fault, that are typically the seat of fluid circulation and mineralization in other core complexes, are barren in the AA. Extension veins hosted by the Jurassic Carrara marbles are among the few examples of (minor) mineralization located in the upper levels of the AA core complex. Calcite–dolomite geothermometry and fluid inclusion data suggest that the mineralizing process in these veins began under pressure (P)-temperature (T) conditions close to the metamorphic peak (about 400°C, 3 kbar). Progressive cooling and mixing between metamorphic and late stage meteoric fluids were probably responsible for most of the mineral deposition. Batches of relatively saline fluids presumably resulted from interaction with evaporitic levels located along the detachment fault. In agreement with previous estimates, fluid inclusion constraints on the P—T synmetamorphic path of the AA suggest a relatively rapid cooling of the core complex as a result of uplift. However, the maximum estimated geothermal gradient (about 35°C/km) is considerably lower than in other core complexes, where large-scale hydrothermal circulation was associated with extension and uplift. Hence, in the AA, fluid circulation at shallow levels and mixing among fluids of different origin were not favoured, thus precluding the formation of mineral deposits along major extensional structures.

Keywords

fluid inclusionscore complexuplift pathextensional veinsCarrara marbleNorthern Apennines
Type
Research Article
Information
Mineralogical Magazine , Volume 63 , Issue 1 , February 1999 , pp. 111 - 122
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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References

Barnes, H.L. (1979) The solubility and occurrence of non-ore forming minerals. In Geochemistry of Hydrothermal Ore Deposits, (Barnes, H.L., ed.). John Wiley and Sons, NewYork, 461–508.Google Scholar
Beaudoin, G., Taylor, B.E. and Sangster, D.F. (1991) Silver-lead-zinc veins, metamorphic core complexes, and hydrologic regimes during crustal extension. Geology, 19, 1217–20.2.3.CO;2>CrossRefGoogle Scholar
Beaudoin, G., Taylor, B.E. and Sangster, D.F. (1992) Silver-lead-zinc veins and crustal hydrology during Eocene extension, southern British Columbia, Canada. Geochim. Cosmochim. Acta, 56, 3513–29.CrossRefGoogle Scholar
Benvenuti, M., Costagliola, P., Lattanzi, P. and Tanelli, G. (1995) The metamorphic hosted siderite-Cu deposit of Frigido: structural setting and isotopic data. In Mineral Deposits: from their Origin to their Enviromental Impact (Pasava, J. Kribek, B. and Zak, K., eds), Balkema, Rotterdam, 843–6.Google Scholar
Bodnar, R.J. (1993) Revised equation and table for determining the freezing point depression of H2O-NaCl solutions. Geochim. Cosmochim. Acta, 57, 683–4.CrossRefGoogle Scholar
Bracci, G., Dalena, D. and Orlandi, P. (1978) I geodi del marmo di Carrara. [Geodes of the Carrara marble]. Atti Soc Tosc. Sci. Nat., Mem., XXIV Serie A, 85, 221–41.Google Scholar
Carmignani, L. and Kligfield, R. (1990) Crustal extension in the Northem Apennines: the transition from compression to extension in the Alpi Apuane core complex. Tectonics, 9, 1275–303.CrossRefGoogle Scholar
Carmignani, L., Fantozzi, P.L., Giglia, G., Kligfield, R. and Meccheri, M. (1992) Tettonica di crosta media e dì crosta superiore nelle Alpi Apuane: un modello per l'interpretazione dei profili sismici a riflessione dell'Appennino settentrionale. [Middle and upper crustal tectonics in the Apuane Alps: a model for interpretation of seismic profiles in the northern Apennines]. Studi Geologici Camerti, Vol. Spec. 2, CROP 1–1 A, 211–25.Google Scholar
Cello, G. and Mazzoli, S. (1996) Extensional processes driven by large-scale duplexing in collisional regimes. J. Struct. Geol., 18, 1275–9.CrossRefGoogle Scholar
Cortecci, G., Lattanzi, P. and Tanelli, G. (1975) C and O-isotope and fluid inclusion studies of carbonate from pyrite and polymetallic ore deposits and associated country rocks (Southern Tuscany, Italy). Chem. Geol-Isot. Geosci. sect., 58, 121–8.CrossRefGoogle Scholar
Costagliola, P., Benvenuti, M., Lattanzi, P. and Tanelli, G. (1994) Uplift path of metamorphic terranes in the Apuane Alps: evidence from fluid inclusion in the Pollone deposit. Mem. Soc. Geol It., 48, 719–23.Google Scholar
Costagliola, P., Barbieri, M., Benvenuti, M., Lattanzi, P. and Castorina, F. (1995) Sr-isotope composition of barite veins at Pollone deposit, Apuane Alps, Tuscany, Italy. In Mineral Deposits: from their Origin to their Enviromental Impact. (Pasava, J. Kribek, B. and Zak, K., eds) Balkema, Rotterdam, 341–4.Google Scholar
Costagliola, P., Benvenuti, M., Lattanzi, P. and Tanelli, G. (1998) Metamorphogenic barite-pyrite(Pb-Zn-Ag) veins at Pollone, Apuane Alps, Tuscany: vein geometry, geothermobarometry, fluid inclusions and geochemistry. Mineral. Petrol., 62, 29–60.CrossRefGoogle Scholar
Crisci, A., Cipriani, C. and Costagliola, P. (1997) Nuovi dati sull'associazione mineralogica dei Marmi di Carrara, Alpi Apuane. [New data on mineral assemblage in the Carrara marble, Apuane Alps]. Museol. Scient., XIII, 267–79.Google Scholar
Doblas, M., Oyarzun, R., Lunar, R., Mayor, N. and Martinez, J. (1988) Detachment faulting and late Paleozoic epithermal Ag-base-metal mineralization in the Spanish central system. Geology, 16, 800–3.2.3.CO;2>CrossRefGoogle Scholar
Essene, E.J. (1983) Solid solution and solvi among metamorphic carbonates with applications to geologic thermobarometry. In Carbonates – Mineralogy and Chemistry (Reeder, R.J., ed.) Rev. Mineral., 11, 77–96.CrossRefGoogle Scholar
Franzini, M., Orlandi, P., Bracci, G. and Dalena, D. (1992) Mineralien der Marmors von Carrara. [Minerals of the Carrara Marble] Mineralien Welt, 3, 16–46.Google Scholar
Fricke, H.C., Wickham, S.M. and, O'Neil, J.R. (1992) Oxygen and hydrogen isotope evidence for meteoric water infiltration during mylonitization and uplift in the Ruby Mountains-East Humboldt Range core complex, Nevada. Contrib. Mineral. Petrol., 111, 203–2.CrossRefGoogle Scholar
Hodgkins, M.A. and Stewart, K.G. (1994) The use of fluid inclusions to constrain fault zone pressure, temperature and kinematic history – an example from Alpi Apuane, Italy. J. Struct. Geol., 16, 85–96.CrossRefGoogle Scholar
Hill, E.J., Baldwin, S.L. and Lister, G.S. (1992) Unroofing of active metamorphic core complexes in the D'entrecasteaux Island, Papaua New Guinea, Geology, 20, 907–10.2.3.CO;2>CrossRefGoogle Scholar
Holland, H.D. and Malinin, S.D. (1979) The solubility and occurrence of non-ore forming minerals. In Geochemistry of Hydrothermal Ore Deposits, 2nd ed. (Barnes, H.L., ed.). John Wiley and Sons, New York, 461–508.Google Scholar
Holm, D.K, Norris, R.J. and Craw, D. (1989) Brittle and ductile deformation in a zone of rapid uplift: central Southem Alps, New Zealand. Tectonics, 8, 153–68.CrossRefGoogle Scholar
Ilchik, R.P., and Barton, M.D. (1997) An amagmatic origin of Carlin-type gold deposits. Econ. Geol., 92, 269–88.CrossRefGoogle Scholar
Jawecki, C. (1996) Fluid regime in the Austrian Moldanubian Zone as indicated by fluid inclusions. Mineral. Petrol., 58, 235–52.CrossRefGoogle Scholar
Kerrich, R. (1987) Detachment zones of Cordilleran metamorphic core complexes: thermal fluid and metasomatic regimes. Geol. Rundschau, 77, 157–82.CrossRefGoogle Scholar
Ketcham, R.A. (1996) Thermal models of core complex evolution in Arizona and New Guinea: Implications for ancient cooling paths and present-day heat flow. Tectonics, 15, 933–51.CrossRefGoogle Scholar
Kligfield, R., Hunziker, J., Dallmeyer, R.D. and Schamel, S. (1986) Dating of deformation phases using K-Ar and 40Ar/39Ar techniques - results from Northern Apennines. J. Struct. Geol., 8, 781–98.CrossRefGoogle Scholar
Kyser, T. and Kerrich R. (1990) Geochemistry of fluids in tectonically active crustal regions. In Fluids in Tectonically Active Regimes of the Continental Crust, (Nesbitt, B.E., ed.). Min. Ass. Canada Short Course Handb., 18, 133–230.Google Scholar
Koons, P.O. and Craw, D. (1991) Gold mineralization as a consequence of continental collision: an example from the Southern Alps, New Zealand. Earth Plan. Sci. Lett., 103, 1–9.CrossRefGoogle Scholar
Lattanzi, P., Benvenuti, M., Costagliola, P. and Tanelli, G. (1994) An overview on recent research on the metallogeny of Tuscany, with special reference to the Apuane Alps. Mem. Soc. Geol It., 48, 613–25.Google Scholar
Moritz, R. and Ghazban, F. (1996) Geological and fluid inclusion studies in the Muteh gold district, sanandaj-Sirjan zone, Isfahan Province, Iran. Schweiz. Mineral. Petogr. Mitt., 76, 85–9.Google Scholar
Mumin, A.H. and Fleet, M.E. (1995) Evolution of gold mineralization in the Ashanti Gold Belt, Ghana: evidence from carbonate composition and paragenesis. Mineral. Petrol., 55, 265–80.CrossRefGoogle Scholar
Orlandi, P., Del Chiaro, L. and Pagano, R. (1996) Minerals of the Seravezza Marble, Tuscany, Italy. Mineral. Record, 27, 47–58.Google Scholar
Pan, Y. and Fleet, M.E. (1992) Calc-silicate alteration in the Hemlo gold deposit Ontario: mineral assem-blages, P-T-X constraints and significance. Econ. Geol., 87, 1104–21.Google Scholar
Powell, R., Condliffe, D.M. and Condliffe, E. (1984) Calcite-dolomite geothermometry in the system CaCO3-MgCO3-FeCO3 – an experimental study. J. Metam. Geol., 2, 33–41.CrossRefGoogle Scholar
Sibson, R.H. (1992) Implications of fault valve behaviour for rupture nucleation and recurrence. Tectonophysics, 211, 283–93.CrossRefGoogle Scholar
Smith, B.M., Reynolds, S.J., Day, H.W. and Bodnar, R.J. (1991) Deep-seated fluid involvement in ductile-brittle deformation and mineralizatíon, South Mountains core cornplex, Arizona. Geol. Soc. Amer. Bull., 103, 559–69.2.3.CO;2>CrossRefGoogle Scholar
Spencer, J.E. and Welty, J.W. (1986) Possible controls of base- and precious-metal mineralization associated with Tertiary detachment faults in the lower Colorado River trough, Arizona and California. Geology, 14, 195–8.2.0.CO;2>CrossRefGoogle Scholar
Sterner, S.M. and Bodnar, R.J. (1989) Synthetic fluid inclusions – VII. Re-equilibration of íluid inclusions in quartz during laboratory-simulated metamorphic burial and uplift. J. Metam. Geol., 7, 243–60.Google Scholar
Thompson, A.B. and England, P.C. (1984) Pressure temperature time paths of regional metamorphism: their inference and interpretation using mineral assemblages in metamorphic rocks. J. Petrol., 25, 929–55.CrossRefGoogle Scholar
Vityk, M.O. and Bodnar, R.J. (1995) Do fluid inclusions in high-grade metamorphic terranes preserve peak metamorphic density during retrograde compression? Amer. Mineral., 80, 641–4.Google Scholar
Zhang, Y.G. and Frantz, J.D. (1987) Determination of the homogenization temperatures and densities of supercritical fluids in the system NaCl-KCl-CaCl2-H2O using synthetic fluid inclusions. Chem. Geol., 74, 289–308.CrossRefGoogle Scholar