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Arc-related high-K magmatism in the Ceuta Peninsula (Internal Rif, Spain): discovery and consequences
Published online by Cambridge University Press: 30 October 2018
Abstract
We document the occurrence of micro-diorite magmatic sills, with magmatic enclaves, in the Ceuta Peninsula within metapelites from the Lower Sebtides units (Internal Rif). All magmatic rocks show a primary magmatic mineralogy and geochemical signature diagnostic for high-K calc-alkaline to shoshonitic island arc magmatism. Moreover, these rocks are significantly affected by secondary metamorphic transformations under greenschist- to amphibolite-facies conditions, regionally dated at c. 21 Ma. Geometric relationships between the sills and the main regional foliation, developed under intermediate-pressure granulite-facies conditions at c. 28 Ma, demonstrate that the sills emplaced during the late stage of this main tectonic event. New U–Pb in situ analyses of monazite performed on the micro-diorite sills provide an age of 20.64 ± 0.19 Ma, coherent with this chronological framework and interpreted as the age of greenschist-facies re-equilibration. The discovery of pre-Miocene high-K calc-alkaline to shoshonitic arc-related magmatism is clearly consistent with the subduction context proposed for the Alboran Basin evolution, according to geophysical investigations. In this framework, the Lower Sebtides units could be considered as part of the upper plate of the subduction system, while the Upper Sebtides must be regarded as the lower subducted plate.
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References
Acosta-Vigil, A, Rubatto, D, Bartoli, O, Cesare, B, Meli, S, Pedrera, A, Azor, A and Tajčmanová, L (2014) Age of anatexis in the crustal footwall of the Ronda peridotites, S Spain. Lithos 210–211, 147–67.CrossRefGoogle Scholar
Ague, JJ (1994) Mass transfer during Barrovian metamorphism of pelites, south-central Connecticut; I, Evidence for changes in composition and volume. American Journal of Science 294, 989–1057.CrossRefGoogle Scholar
Ague, JJ (2003) Fluid infiltration and transport of major, minor, and trace elements during regional metamorphism of carbonate rocks, Wepawaug Schist, Connecticut, USA. American Journal of Science 303, 753–816.CrossRefGoogle Scholar
Aguirre, L, Robinson, D, Bevins, RE, Morata, D, Vergara, M, Fonseca, E and Carrasco, J (2000) A low-grade metamorphic model for the Miocene volcanic sequences in the Andes of central Chile. New Zealand Journal of Geology and Geophysics 43, 83–93.CrossRefGoogle Scholar
Barbarin, B (1990) Granitoids: main petrogenetic classifications in relation to origin and tectonic setting. Geological Journal 25, 227–38.CrossRefGoogle Scholar
Beccaluva, L, Bianchini, G and Wilson, M eds (2007) Cenozoic Volcanism in the Mediterranean Area. Geological Society of America Special Papers no. 418, 358 pp.Google Scholar
Bellon, H, Bordet, P and Montenat, C (1983) Chronologie du magmatisme Neogene des Cordilleres Betiques (Espagne meridionale). Bulletin de la Société géologique de France S7-XXV, 205–17.CrossRefGoogle Scholar
Bezada, MJ, Humphreys, ED, Toomey, DR, Harnafi, M, Dávila, JM and Gallart, J (2013) Evidence for slab rollback in westernmost Mediterranean from improved upper mantle imaging. Earth and Planetary Science Letters 368, 51–60.CrossRefGoogle Scholar
Blanco, MJ and Spakman, W (1993) The P-wave velocity structure of the mantle below the Iberian Peninsula: evidence for subducted lithosphere below southern Spain. Tectonophysics 221, 13–34.CrossRefGoogle Scholar
Bosch, D, Garrido, CJ, Bruguier, O, Dhuime, B, Bodinier, J-L, Padròn-Navarta, JA and Galland, B (2011) Building an island-arc crustal section: time constraints from a LA-ICP-MS zircon study. Earth and Planetary Science Letters 309, 268–79.CrossRefGoogle Scholar
Bosch, D, Hammor, D, Bruguier, O, Caby, R and Luck, J-M (2002) Monazite “in situ” 207Pb/206Pb geochronology using a small geometry high-resolution ion probe. Application to Archaean and Proterozoic rocks. Chemical Geology 184, 151–65.CrossRefGoogle Scholar
Bouybaouene, ML, Goffé, B and Michard, A (1995) High-pressure, low-temperature metamorphism in the Sebtides nappes, northern Rif, Morocco. Geogaceta 17, 117–19.Google Scholar
Brewer, TS and Menuge, JF (1998) Metamorphic overprinting of Sm–Nd isotopic systems in volcanic rocks: the Telemark Supergroup, southern Norway. Chemical Geology 145, 1–16.CrossRefGoogle Scholar
Bridgwater, D ed. (1989) Fluid Movements — Element Transport and the Composition of the Deep Crust. Dordrecht: Springer Netherlands, 415 pp.CrossRefGoogle Scholar
Brown, M (2010) Paired metamorphic belts revisited. Gondwana Research 18, 46–59.CrossRefGoogle Scholar
Bruguier, O, Hammor, D, Bosch, D and Caby, R (2009) Miocene incorporation of peridotite into the Hercynian basement of the Maghrebides (Edough massif, NE Algeria): implications for the geodynamic evolution of the Western Mediterranean. Chemical Geology 261, 171–83.CrossRefGoogle Scholar
Carignan, J, Hild, P, Mevelle, G, Morel, J and Yeghicheyan, D (2001) Routine analyses of trace elements in geological samples using flow injection and low pressure on-line liquid chromatography coupled to ICP-MS: a study of geochemical reference materials BR, DR-N, UB-N, AN-G and GH. Geostandards and Geoanalytical Research 25, 187–98.CrossRefGoogle Scholar
Carminati, E, Lustrino, M and Doglioni, C (2012) Geodynamic evolution of the central and western Mediterranean: tectonics vs. igneous petrology constraints. Tectonophysics 579, 173–92.CrossRefGoogle Scholar
Chalouan, A, Michard, A, Feinberg, H, Montigny, R and Saddiqi, O (2001) The Rif mountain building (Morocco): a new tectonic scenario. Bulletin de la Société géologique de France 172, 603–16.CrossRefGoogle Scholar
Chalouan, A, Michard, A, Kadiri, KEL, Negro, F, Frizon de Lamotte, D, Soto, JI and Saddiqi, O (2008) The Rif belt. In Lecture Notes in Earth Sciences (ed. Michard, A), pp. 203–302. Berlin: Springer.Google Scholar
Comas, MC, Platt, JP, Soto, JI and Watts, AB (1999) The origin and tectonic history of the Alboran Basin: insights from leg 161 results. In Proceedings of the Ocean Drilling Program, Scientific Results, vol. 161 (eds Zahn, R, Comas, MC and Klaus, A), pp. 555–80. College Station, Texas.Google Scholar
Conticelli, S, Guarnieri, L, Farinelli, A, Mattei, M, Avanzinelli, R, Bianchini, G, Boari, E, Tommasini, S, Tiepolo, M, Prelević, D and Venturelli, G (2009) Trace elements and Sr–Nd–Pb isotopes of K-rich, shoshonitic, and calc-alkaline magmatism of the Western Mediterranean Region: genesis of ultrapotassic to calc-alkaline magmatic associations in a post-collisional geodynamic setting. Lithos 107, 68–92.CrossRefGoogle Scholar
Cox, KG, Bell, JD and Pankhurst, RJ (1979) The Interpretation of Igneous Rocks. London: George Allen & Unwin.CrossRefGoogle Scholar
Duggen, S, Hoernle, K, Klügel, A, Geldmacher, J, Thirlwall, M, Hauff, F, Lowry, D and Oates, N (2008) Geochemical zonation of the Miocene Alboran Basin volcanism (westernmost Mediterranean): geodynamic implications. Contributions to Mineralogy and Petrology 156, 577–93.CrossRefGoogle Scholar
Duggen, S, Hoernle, K, van den Bogaard, P and Garbe-Schönberg, D (2005) Post-collisional transition from subduction- to intraplate-type magmatism in the westernmost Mediterranean: evidence for continental-edge delamination of subcontinental lithosphere. Journal of Petrology 46, 1155–201.CrossRefGoogle Scholar
Duggen, S, Hoernle, K, van den Bogaard, P and Harris, C (2004) Magmatic evolution of the Alboran region: the role of subduction in forming the western Mediterranean and causing the Messinian Salinity Crisis. Earth and Planetary Science Letters 218, 91–108.CrossRefGoogle Scholar
Ernst, WG (1973) Blueschist metamorphism and P–T regimes in active subduction zones. Tectonophysics 17, 255–72.CrossRefGoogle Scholar
Ernst, WG (1975) Systematics of large-scale tectonics and age progressions in Alpine and Circum-Pacific blueschist belts. Tectonophysics 26, 229–46.CrossRefGoogle Scholar
Esteban, JJ, Tubía, JM, Cuevas, J, Seward, D, Larionov, A, Sergeev, S and Navarro-Vilá, F (2013) Insights into extensional events in the Betic Cordilleras, southern Spain: new fission-track and U–Pb SHRIMP analyses. Tectonophysics 603, 179–88.CrossRefGoogle Scholar
Faccenna, C, Becker, TW, Auer, L, Billi, A, Boschi, L, Brun, JP, Capitanio, FA, Funiciello, F, Horvàth, F, Jolivet, L, Piromallo, C, Royden, L, Rossetti, F and Serpelloni, E (2014) Mantle dynamics in the Mediterranean. Reviews of Geophysics 52, 283–332.CrossRefGoogle Scholar
Faccenna, C, Becker, TW, Lucente, FP, Jolivet, L and Rossetti, F (2001) History of subduction and back-arc extension in the Central Mediterranean. Geophysical Journal International 145, 809–20.CrossRefGoogle Scholar
Faccenna, C, Piromallo, C, Crespo-Blanc, A, Jolivet, L and Rossetti, F (2004) Lateral slab deformation and the origin of the western Mediterranean arcs. Tectonics 23, TC1012, doi: 10.1029/2002TC001488.CrossRefGoogle Scholar
Faccenna, C, Speranza, F, Caracciolo, FD, Mattei, M and Oggiano, G (2002) Extensional tectonics on Sardinia (Italy): insights into the arc–back-arc transitional regime. Tectonophysics 356, 213–32.CrossRefGoogle Scholar
Ferry, JM (1994) A historical review of metamorphic fluid flow. Journal of Geophysical Research 99, 15487–98.CrossRefGoogle Scholar
Frost, BR, Barnes, CG, Collins, WJ, Arculus, RJ, Ellis, DJ and Frost, CD (2001) A geochemical classification for granitic rocks. Journal of Petrology 42, 2033–48.CrossRefGoogle Scholar
Gill, RCO, Aparicio, A, El Azzouzi, M, Hernandez, J, Thirlwall, MF, Bourgois, J and Marriner, GF (2004) Depleted arc volcanism in the Alboran Sea and shoshonitic volcanism in Morocco: geochemical and isotopic constraints on Neogene tectonic processes. Lithos 78, 363–88.CrossRefGoogle Scholar
Goffe, B, Azanon, JM, Bouybaouene, ML and Jullien, M (1996) Metamorphic cookeite in Alpine metapelites from Rif, northern Morocco, and the Betic Chain, southern Spain. European Journal of Mineralogy 8, 335–48.CrossRefGoogle Scholar
Gueydan, F, Pitra, P, Afiri, A, Poujol, M, Essaifi, A and Paquette, JL (2015) Oligo-Miocene thinning of the Beni Bousera peridotites and their Variscan crustal host rocks, Internal Rif, Morocco. Tectonics 34, 1244–68.CrossRefGoogle Scholar
Gutscher, MA, Malod, J, Rehault, JP, Contrucci, I, Klingelhoefer, F, Mendes-Victor, L and Spakman, W (2002) Evidence for active subduction beneath Gibraltar. Geology 30, 1071–74.2.0.CO;2>CrossRefGoogle Scholar
Hastie, AR, Kerr, AC, Pearce, JA and Mitchell, SF (2007) Classification of altered volcanic island arc rocks using immobile trace elements: development of the Th–Co discrimination diagram. Journal of Petrology 48, 2341–57.CrossRefGoogle Scholar
Homonnay, E, Corsini, M, Lardeaux, JM, Romagny, A, Münch, P, Bosch, D, Cenki-Tok, B and Ouazzani-Touhami, M (2018) Miocene crustal extension following thrust tectonic in the Lower Sebtides units (internal Rif, Ceuta Peninsula, Spain): implication for the geodynamic evolution of the Alboran domain. Tectonophysics 722, 507–35.CrossRefGoogle Scholar
Janots, E, Negro, F, Brunet, F, Goffé, B, Engi, M & Bouybaouène, ML (2006) Evolution of the REE mineralogy in HP–LT metapelites of the Sebtide complex, Rif, Morocco: monazite stability and geochronology. Lithos 87, 214–34.CrossRefGoogle Scholar
Jolivet, L and Brun, J-P (2010) Cenozoic geodynamic evolution of the Aegean. International Journal of Earth Sciences 99, 109–38.CrossRefGoogle Scholar
Jolivet, L, Faccenna, C, Huet, B, Labrousse, L, Le Pourhiet, L, Lacombe, O, Lecomte, E, Burov, E, Denèle, Y, Brun, J-P, Philippon, M, Paul, A, Salaün, G, Karabulut, H, Piromallo, C, Monié, P, Gueydan, F, Okay, AI, Oberhänsli, R, Pourteau, A, Augier, R, Gadenne, L and Driussi, O (2013) Aegean tectonics: strain localisation, slab tearing and trench retreat. Tectonophysics 597–598, 1–33.CrossRefGoogle Scholar
Kornprobst, J (1974) Contribution à l’étude pétrographique et structurale de la zone interne du Rif (Maroc septentrional). Notes Mémoires du Service Géologique du Maroc, Rabat 251, 256 pp.Google Scholar
Lawrie, KC (1992) Geochemical characterisation of a polyphase deformed, altered, and high grade metamorphosed volcanic terrane: implications for the tectonic setting of the Svecofennides, south-central Finland. Precambrian Research 59, 171–205.CrossRefGoogle Scholar
Le Maitre, RW, Bateman, P, Dudek, A, Keller, J, Lameyre, J, Le Bas, MJ, Sabine, PA, Schmid, R, Sorensen, H, Streickeisen, A, Woolley, A and Zanettin, B (1989) Igneous Rocks: A Classification and Glossary of Terms (Subcommission ed. Le Maitre, RW). Oxford: Blackwell Scientific Publications, 193 pp.Google Scholar
Lonergan, L and White, N (1997) Origin of the Betic-Rif mountain belt. Tectonics 16, 504–22.CrossRefGoogle Scholar
Ludwig, KR (2003) Mathematical–statistical treatment of data and errors for 230Th/U geochronology. Reviews in Mineralogy and Geochemistry 52, 631–56.CrossRefGoogle Scholar
Lustrino, M, Duggen, S and Rosenberg, CL (2011) The Central-Western Mediterranean: anomalous igneous activity in an anomalous collisional tectonic setting. Earth-Science Reviews 104, 1–40.CrossRefGoogle Scholar
Martínez-García, P, Comas, M, Lonergan, L and Watts, AB (2017) From extension to shortening: tectonic inversion distributed in time and space in the Alboran Sea, Western Mediterranean. Tectonics 36, 2777–805.CrossRefGoogle Scholar
Masters, RL and Ague, JJ (2005) Regional-scale fluid flow and element mobility in Barrow’s metamorphic zones, Stonehaven, Scotland. Contributions to Mineralogy and Petrology 150, 1–18.CrossRefGoogle Scholar
Michard, A, Goffe, B, Bouybaouene, ML and Saddiqi, O (1997) Late Hercynian–Mesozoic thinning in the Alboran domain: metamorphic data from the northern Rif, Morocco. Terra Nova 9, 171–4.CrossRefGoogle Scholar
Michard, A, Goffe, B, Chalouan, A and Saddiqi, O (1991) The correlations between the Rifan-Betic Mountain Belt and the Alps, and their consequences. Bulletin de la Societe geologique de France 162, 1151–60.Google Scholar
Michard, A, Negro, F, Saddiqi, O, Bouybaouene, ML, Chalouan, A, Montigny, R and Goffé, B (2006) Pressure-temperature-time constraints on the Maghrebide mountain building: evidence from the Rif-Betic transect (Morocco, Spain), Algerian correlations, and geodynamic implications. Comptes Rendus Geoscience 338, 92–114.CrossRefGoogle Scholar
Miyashiro, A (1961) Evolution of metamorphic belts. Journal of Petrology 2, 277–311.CrossRefGoogle Scholar
Montel, JM, Kornprobst, J and Vielzeuf, D (2000) Preservation of old U–Th–Pb ages in shielded monazite: example from the Beni Bousera Hercynian kinzigites (Morocco). Journal of Metamorphic Geology 18, 335–42.CrossRefGoogle Scholar
Negro, F, Beyssac, O, Goffe, B, Saddiqi, O and Bouybaouene, ML (2006) Thermal structure of the Alboran Domain in the Rif (northern Morocco) and the Western Betics (southern Spain). Constraints from Raman spectroscopy of carbonaceous material. Journal of Metamorphic Geology 24, 309–27.CrossRefGoogle Scholar
Oxburgh, ER and Turcotte, DL (1970) Thermal structure of island arcs. Geological Society of America Bulletin 81, 1665–88.CrossRefGoogle Scholar
Pearce, JA (1982) Trace element characteristics of lavas from destructive plate boundaries. In Andesites: Orogenic Andesites and Related Rocks (ed. Thorpe, RS), pp. 525–48. Chichester; New York: Wiley.Google Scholar
Pearce, JA (1983) Role of the sub-continental lithosphere in magma genesis at active continental margins. In Continental Basalts and Mantle Xenoliths (eds Hawkesworth, CJ and Norry, MJ), pp. 230–49. Nantwich, Cheshire: Shiva Publications.Google Scholar
Pearce, JA (1996) A user’s guide to basalt discrimination diagrams. In Trace Element Geochemistry of Volcanic Rocks: Applications for Massive Sulphide Exploration (ed. Wyman, DA), pp. 79–113. Geological Association of Canada, Short Course Notes vol. 12.Google Scholar
Pearce, JA and Cann, JR (1973) Tectonic setting of basic volcanic rocks determined using trace element analyses. Earth and Planetary Science Letters 19, 290–300.CrossRefGoogle Scholar
Pearce, JA, Nigel, B, Harris, N and Tindle, A (1984) Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology 25, 956–83.CrossRefGoogle Scholar
Peccerillo, A and Taylor, SR (1976) Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey. Contributions to Mineralogy and Petrology 58, 63–81.CrossRefGoogle Scholar
Platt, JP, Argles, TW, Carter, A, Kelley, SP, Whitehouse, MJ and Lonergan, L (2003) Exhumation of the Ronda peridotite and its crustal envelope: constraints from thermal modelling of a P-T-time array. Journal of the Geological Society, London 160, 655–76.CrossRefGoogle Scholar
Poitrasson, F, Chenery, S and Shepherd, TJ (2000) Electron microprobe and LA-ICP-MS study of monazite hydrothermal alteration: implications for U–Th–Pb geochronology and nuclear ceramics. Geochimica et Cosmochimica Acta 64, 3283–97.CrossRefGoogle Scholar
Potdevin, J-L, Cotonian, C and Bertrand, H (1989) Diffusion model for magmatic reaction. An example of amphibole breakdown in the trachytic dome of Monac (French Massif Central). Comptes Rendus de l’Academie des Sciences Paris 309, 63–8.Google Scholar
Rollinson, H (1993) Using Geochemical Data: Evaluation, Presentation, Interpretation, pp. 150–54. Harlow, Essex: Longman Scientific & Technical.Google Scholar
Roser, BP and Nathan, S (1997) An evaluation of elemental mobility during metamorphism of a turbidite sequence (Greenland Group, New Zealand). Geological Magazine 134, 219–34.CrossRefGoogle Scholar
Rossetti, F, Theye, T, Lucci, F, Bouybaouene, ML, Dini, A,Gerdes, A, Phillips, D and Cozzupoli, D (2010) Timing and modes of granite magmatism in the core of the Alboran Domain (Rif chain, northern Morocco): implications for the Alpine evolution of the western Mediterranean. Tectonics 29, TC2017, doi: 10.1029/2009TC002487.CrossRefGoogle Scholar
Royden, LH (1993) Evolution of the retreating subduction boundaries formed during continental collision. Tectonics 12, 629–38.CrossRefGoogle Scholar
Ruiz-Cruz, MD and De Galdeano, CS (2012) Diamond and coesite in ultrahigh-pressure–ultrahigh-temperature granulites from Ceuta, Northern Rif, northwest Africa. Mineralogical Magazine 76, 683–704.CrossRefGoogle Scholar
Ruiz-Cruz, MD and De Galdeano, CS (2013) Petrology of microdiamond-bearing schists from the Torrox unit, Betic Cordillera, Spain. European Journal of Mineralogy 25, 919–33.CrossRefGoogle Scholar
Schandl, ES and Gorton, MP (2002) Application of high field strength elements to discriminate tectonic settings in VMS environments. Economic Geology 97, 629–42.CrossRefGoogle Scholar
Schiffman, P, Elders, WA, Williams, AE, McDowell, SD and Bird, DK (1984) Active metasomatism in the Cerro Prieto geothermal system, Baja California, Mexico: a telescoped low-pressure, low-temperature metamorphic facies series. Geology 12, 12–15.2.0.CO;2>CrossRefGoogle Scholar
Seydoux-Guillaume, A-M, Montel, J-M, Bingen, B, Bosse, V, de Parseval, P, Paquette, J-L, Janots, E and Wirth, R (2012) Low-temperature alteration of monazite: fluid mediated coupled dissolution–precipitation, irradiation damage, and disturbance of the U–Pb and Th–Pb chronometers. Chemical Geology 330–331, 140–58.CrossRefGoogle Scholar
Spakman, W and Wortel, R (2004) A tomographic view on western Mediterranean geodynamics. In The TRANSMED Atlas. The Mediterranean Region from Crust to Mantle (eds Cavazza, W, Roure, FM, Spakman, W, Stampfli, GM and Ziegler, PA), pp. 31–52. Berlin: Springer.CrossRefGoogle Scholar
Steiger, RH and Jäger, E (1977) Subcommission on geochronology: convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters 36, 359–62.CrossRefGoogle Scholar
Timoulali, Y, Djellit, H, Hahou, Y, Jabour, N and Merrouch, R (2014) New evidence of delamination in the Western Alboran Sea: geodynamic evolution of the Alboran domain and its margins. Journal of Geodynamics 77, 206–16.CrossRefGoogle Scholar
Torres-Roldan, RL, Poli, G and Peccerillo, A (1986) An early Miocene arc-tholeiitic magmatic dyke event from the Alboran sea: evidence for precollision subduction and back-arc crustal extension in the westernmost Mediterranean. Geologische Rundschau 75, 219–34.CrossRefGoogle Scholar
Turner, SP, Platt, JP, George, RMM, Kelley, SP, Pearson, DG and Nowell, GM (1999) Magmatism associated with orogenic collapse of the Betic–Alboran Domain, SE Spain. Journal of Petrology 40, 1011–36.CrossRefGoogle Scholar
Van Hinsbergen, DJJ, Vissers, RLM and Spakman, W (2014) Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation. Tectonics 33, 393–419.CrossRefGoogle Scholar
Vergés, J and Fernàndez, M (2012) Tethys–Atlantic interaction along the Iberia–Africa plate boundary: the Betic–Rif orogenic system. Tectonophysics 579, 144–72.CrossRefGoogle Scholar
Villaseñor, A, Chevrot, S, Harnafi, M, Gallart, J, Pazos, A, Serrano, I, Córdoba, D, Pulgar, JA and Ibarra, P (2015) Subduction and volcanism in the Iberia–North Africa collision zone from tomographic images of the upper mantle. Tectonophysics 663, 238–49.CrossRefGoogle Scholar
Williams, ML, Jercinovic, MJ, Harlov, DE, Budzyń, B and Hetherington, CJ (2011) Resetting monazite ages during fluid-related alteration. Chemical Geology 283, 218–25.CrossRefGoogle Scholar
Willner, AP (2005) Pressure–temperature evolution of a late Palaeozoic paired metamorphic belt in north-central Chile (34°–35°30′S). Journal of Petrology 46, 1805–33.CrossRefGoogle Scholar
Willner, AP, Glodny, J, Gerya, TV, Godoy, E and Massonne, H-J (2004) A counterclockwise PTt path of high-pressure/low-temperature rocks from the Coastal Cordillera accretionary complex of south-central Chile: constraints for the earliest stage of subduction mass flow. Lithos 75, 283–310.CrossRefGoogle Scholar
Winchester, JA and Floyd, PA (1977) Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology 20, 325–43.CrossRefGoogle Scholar
Zheng, Y-F, Chen, R-X and Zhao, Z-F (2009) Chemical geodynamics of continental subduction-zone metamorphism: insights from studies of the Chinese Continental Scientific Drilling (CCSD) core samples. Tectonophysics 475, 327–58.CrossRefGoogle Scholar