Abstract
A Rb-Sr analysis of suites of samples from a small intrusion of cordierite-bearing alkali granite into the peridotite of the Sierra Bermeja (Serrania de Ronda) yields an age of 22± 4 Ma (λ = 1.42×10−11 a−1): Late Oligocene/Early Miocene. It is believed that the intrusion was derived from contact-anatectic melts produced along the hot ultramafic mass during and/or directly following its tangential, tectonic dislocation from a mantle diapir. Its age can thus be taken as dating the termination of the hot emplacement of the ultramafic masses. K-Ar dates of biotites and Rb-Sr dates of biotite/whole-rock pairs in contact-metamorphic wall rocks along the ultramafics mostly lie between 19.5 and 18.5 Ma. This probably indicates that about 19 Ma ago the contact-zones of the ultramafic masses had cooled down to the blocking temperature of biotite to Rb-Sr and K-Ar.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Aguilar, M.J., Aparicio, A., Crespo, V., Fuster, J.M., Muñoz, M., Reyer, J.L., Sagredo, J.: Investigatión de níquel en los macizos ultrabásicos de Málaga. Nuevos datos sobre la geología y petrogénesis. Bol. Inst. Geol. Min. Esp. 84 (6): 447–472 (1973)
Andriessen, P.A.M.: Isotopic age relations within the polymetamorphic complex of the island of Naxos (Cyclades, Greece). Verh. no. 3 Z.W.O. Laboratorium voor Isotopen-Geologie, Amsterdam: (also: Ph.D. Thesis State University, Utrecht), 60p. (1978)
Armstrong, R.L., Jäger, E., Eberhardt, P.: A comparison of K-Ar and Rb-Sr ages on Alpine biotites. Earth Planet. Sci. Lett. 1, 13–19 (1966)
Blumenthal, M.M.: Sur le dispositif des nappes de recouvrement de la Serranía de Ronda (Andalousie). Eclogae Geol. Helv. 21, 358–363 (1928)
Bourgois, J., Chauve, P., Magne, J., Monnot, J., Peyre, Y., Rigo, E., Rivière, M.: La formation de Las Millanas, Série burdigalienne transgressive sur les zones internes des Cordillères bétiques occidentales (région d'Alozaina-Tolox, province de Malaga, Espagne). C.R. Acad. Sci. (Paris) 275D, 169–172 (1972)
Buntfuss, J.: Die Geologie der Küstenkette zwischen dem Rio Verde und dem Campo de Gibraltar (Westliche Betische Kordillere/Südspanien). Geol. Jahrb. 87, 373–420 (1970)
Darot, M.: Cinématique de l'extrusion, à partir du manteau, des péridotites de la Sierra Bermeja (Serranía de Ronda, Espagne). C.R. Acad. Sci. (Paris) 287D, 1673–1676 (1974)
Dickey, J.S. Jr.: Partial fusion products in alpine-type peridotites: Serrania de la Ronda and other examples. Mineral. Soc. Am. Spec. Pap. 3, 33–49 (1970)
Dickey, J.S. Jr., Obata, M.: Graphitic hornfels dikes in the Ronda high-temperature peridotite massif. Am. Mineral. 59, 1183–1189 (1974)
Didon, J., Durand-Delga, M., Kornprobst, J.: Homologies géologiques entre les deux rives du Détroit de Gibraltar. Soc. Géol. France Bull. VII, 15 (2), 77–105 (1973)
Dürr, St.: Geologie der Serrania de Ronda und ihrer südwestlichen Ausläufer (Andalusien). Geol. Rom. 6, 1–73 (1967)
Egeler, C.G., Simon, O.J.: Sur la tectonique de la Zone Bétique (Cordillères Bétiques, Espagne). Verh. K. Ned. Akad. Wet., XXV, no. 3, 1–90 (1969)
Flanagan, F.J.: 1972 Values for international geochemieal reference samples. Geochim. Cosmochim. Acta 37, 1189–1200 (1973)
Hernandèz-Pacheco, A.: Estudio petrográfico y geoquímico del macizo ultramáfico de Ojén (Málaga). Estud. Geol. (Madrid), 23, 85–143 (1967)
Jäger, E., Niggli, E., Wenk, E.: Rb-Sr Altersbestimmungen an Glimmern der Zentralalpen. Beitr. Geol. Karte Schweiz (Nf. Liefg.), 134 p. (1967)
Kornprobst, J.: Le massif ultrabasique des Beni Bouchera (Rif interne, Marox); étude des péridotites de haut temperature et de haute pression et des pyroxénolites, à grenat ou sans grenat, qui leur sont associées. Contrib. Mineral. Petrol. 23, 283–322 (1969)
Kornprobst, J.: Les péridotites et les pyroxénolites du massif des Beni Bouchera: une étude expérimentale entre 1,100 et 1,550 ° C, sous 15 à 30 kbars de pression sèche. Contrib. Mineral. Petrol. 29, 290–309 (1970)
Kornprobst, J.: Contribution à l'étude pétrographique et structurale de la zone interne du Rif. Notes Serv. Geol Maroc, no. 251 (1974)
Loomis, T.P.: Contact metamorphism of pelitic rock by the Ronda ultramafic intrusion, Southern Spain. Geol. Soc. Am. Bull. 83 (8), 2449–2474 (1972a)
Loomis, T.P.: Diapiric emplacement of the Ronda high-temperature ultramafic intrusion, Southern Spain. Geol. Soc. Am. Bull. 83, (8), 2475–2496 (1972b)
Loomis, T.P.: Tertiary mantle diapirism, orogeny, and plate tectonics east of the Strait of Gibraltar. Am. J. Sci. 275, 1–30 (1975)
Lundeen, M.T.: Emplacement of the Ronda peridotite, Sierra Bermeja, Spain. Geol. Soc. Am. Bull. 89, 172–180 (1978)
McDougall, I., Page, R.W.: Toward a physical time-scale for the Neogene — data from the Australian region. Late Neogene Epoch boundaries: 74–84 (1975)
McIntyre, G.A., Brooks, C., Compston, W., Turek, E.: The statistical assesment of Rb-Sr isochrons. J. Geophys. Res. 71, 5459–5468 (1966)
Mollat, H.: Schichtenfolge und tektonischer Bau der Sierra Blanca und ihrer Umgebung (betische Kordilleren, Südspanien). Geol. Jahrb. 86, 471–532 (1968)
Nicolas, A., Jackson, E.D.: Répartition en deux provinces des péridotites des chaînes alpines logeant la Méditerranée: implications géotectoniques. Bull. Suisse Mineral. Petrogr. 52, 479–495 (1972)
Nockolds, S.R.: Average chemical compositions of some igneous rocks. Gol. Soc. Am. Bull. 65, 1007–1032 (1954)
Paquet, J.: Tectonique éocène dans les Cordillères bétiques; vers une nouvelle conception de la paléogéographie en Méditerranée occidentale. Bull. Soc. Geol. Fr. VII, 16, 58–73 (1974)
Pomerol, C.: Critical review of isotopic dates in relation to Paleogene stratotypes. In: Contributions to the geologic time scale (G.V. Vohee, M.F. Glaessner, H.D. Hedberg, eds.). Am. Assoc. Petrol. Geol., Studies in Geology No. 6, 235–245 (1978)
Seideman, D.E.: An 40Ar/39Ar age spectrum for a cordierite-bearing rock: isolating the effects of excess radiogenic 40Ar. Earth Planet. Sci. Lett. 33, 268–272 (1976)
Tuttle, O.F., Bowen, N.L.: Origin of granite in the light of experimental studies in the system NaAlSi3O8 —KAlSi3O8 — SiO2 — H2O. Geol. Soc. Am. Mem. 74, 1–153 (1958)
Verdurmen, E.A.Th.: Accuracy of X-ray fluorescence spectrometric determinations of Rb and Sr concentrations in rock samples. X-Ray Spectrom. 6 (3), 117–122 (1977)
Westerhof, A.B.: Genesis of magnetite ore near Marbella, southern Spain: formation by oxidation of silicates in polymetamorphic gedrite-bearing and other rocks. 216p. Ph.D. Thesis University of Amsterdam, 216 p. (1975)
Westerhof, A.B.: On the contact relations of high-temperature peridotites in the Serrania de Ronda, southern Spain. Tectonophysics 39, 579–591 (1977)
York, D.: Least-squares fitting of a straight line. Can. J. Phys. 44, 1079–1086 (1966)
York, D.: The best isochron. Earth Planet. Sci. Lett. 2, 479–482 (1967)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Priem, H.N.A., Boelrijk, N.A.I.M., Hebeda, E.H. et al. Isotopic dating of the emplacement of the ultramafic masses in the Serrania de Ronda, Southern Spain. Contr. Mineral. and Petrol. 70, 103–109 (1979). https://doi.org/10.1007/BF00371876
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00371876