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Some crystallochemical and petrographic criteria for determining source rocks and sedimentary processes. The example of Neogene deposits of the Alpujarran Corridor (Betic Cordillera, SE Spain)

Published online by Cambridge University Press:  09 July 2018

F. Nieto ,
M. Ortega-Huertas  and
N. Velilla
F. Nieto
Affiliation:
Dpto. Mineralogía y Petrología e Instituto Andaluz de Geología Mediterránea, Facultad de Ciencias, Universidad de Granada, Spain
M. Ortega-Huertas
Affiliation:
Dpto. Mineralogía y Petrología e Instituto Andaluz de Geología Mediterránea, Facultad de Ciencias, Universidad de Granada, Spain
N. Velilla
Affiliation:
Dpto. Mineralogía y Petrología e Instituto Andaluz de Geología Mediterránea, Facultad de Ciencias, Universidad de Granada, Spain
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Abstract

The aim of this study was to determine the influence of the various source areas on the Neogene sediments of the Alpujarran Corridor, to ascertain the type and intensity of the sedimentary processes involved, and to establish some generally applicable criteria. At the bottom of the sections the detrital pebbles are derived from the highest nappes of the Alpujárride Complex, whereas those at the top are from the deepest unit of the Nevado-Filábride Complex (the Veleta nappe); between these the entire range of materials from the lower-Alpujárride Complex and the upper-Navado-Filábride Unit (the Mulhacén nappe) is represented. Comparison of the micas and chlorites in the pebbles with those in the conglomerate matrix reveals the effect of the sedimentary processes on every aspect of the crystallochemistry. The d001 of the chlorites and the b0 of the micas are scarcely affected and can be used to determine the source area. The crystallinity, the Fe content of the chlorites and the basal spacing and angular difference (Δ2θ M-P) of the white micas, on the other hand, are all modified, especially in the clay fraction, according to the degree and nature of the alteration of the sediments, and consequently can be used as a guide to the extent of this process.

Type
Research Article
Information
Clay Minerals , Volume 24 , Issue 4 , December 1989 , pp. 603 - 616
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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References

Aldaya, V., Garcia Duenas, V. & Navarro Vila, F. (1981) Los mantos Alpujarrides del tercio Central de las Cordilleras Beticas. Ensayo de correlacion tectonica de los Alpujarrides. Acta Geol, Hisp., 14, 154–166. Google Scholar
Brindley, G.W. (1961) Chlorite minerals. Pp. 242–296 in: The X-ray Identification and Crystal Structures of Clay Minerals (Brown, G., editor). Mineralogical Society, London.Google Scholar
Cuevas, F., Martin Penela, A., Rodriguez Fernandez, J., Sanz de Galdeano, C. & Vera, J.A. (1984) Premiére datation du Turolien a la base de la Formation de Guadix (Secteur Abla, Almeria, Espagne). Geobios, 17, 355–361.CrossRefGoogle Scholar
Essene, E.J. (1982) Geologic thermometry and barometry. Pp. 153–196 in: Characterizaton of Metamorphism through Mineral Equilibria (Ferry, J.M., editor). Mineralogical Society of America.CrossRefGoogle Scholar
Eugster, H.P.» Albee, A.L., Bence, J.B., Thompson, J.R. & Waldbaum, D.R. (1972) The two phase region and excess mixing properties of paragonite-muscovite crystalline solutions. 3. Pet., 13, 147–179.Google Scholar
Evans, B.W. & Guidotti, C.V. (1966) The sillimanite-potash feldspar isograd in Western Maine, U.S.A. Contr. Min. Pet., 12, 25–62.CrossRefGoogle Scholar
Liebling, R.S. & Scherp, H.S. (1976) Chlorite and mica as indicators of depositional enviroment and provenance. Bull. Geol. Soc. Am., 87, 513–514.2.0.CO;2>CrossRefGoogle Scholar
Liebling, R.S. & Scherp, H.S. (1980) Chlorite and mica as indicators of provenance. Clays Clay Miner., 28, 230–232.CrossRefGoogle Scholar
Löpez Aguayo, F., Ortega Huertas, M. & Velilla, N. (1986) Procesos de alteracion supergenica en Sierra Almagrera: Mineralogia de las rocas encajantes. Bol. Soc, Esp. Mineralogia, 9, 291–298.Google Scholar
Martín Ramos, J.D. (1977) Las micas de las Cordilleras Beticas (Zorns Internas). Ph. thesis, Univ. Granada, Spain.Google Scholar
Martin Ramos, J.D. & Rodriguez Gallego, M. (1976) Barometria y termometria geologica mediante pardmetms cristalogrificos de micas. Aplicaciön a la Cordillera Bética. Reun. Geodinámica de la Cordillera Betica y Mar de Albordn, 115–124.Google Scholar
Nieto, F. (1983) Las cloritas de las Cordilleras Beticas.Ph. thesis, Uni. Granada, Spain.Google Scholar
Nieto, F., Ortega-Huertas, M. & Sebastian, E. (1980) Cloritas en sedimentos postorogenicos de las Depresiones de Granada y Guadix-Baza. Estudio cristaloquLmico. Estudios Geol., 36, 111–121.Google Scholar
Nieto, F. & Rodriguez Gallego, M. (1981) Alteracion experimental de cloritas. Acad. Ciencias Mat., Fisico- Quim. y Nat. de Granada, 1, 108–124.Google Scholar
Nieto, F. & Rodriguez Gallego, M. (1983) Metodologia para el estudio de la clorita en rocas metamorficas. Rendiconti Soc. Italiana di Miner, e Pet. 38, 1429–1436.Google Scholar
Ortega-Huertas, M., Nieto, F., Rodriguez Fernandez, J. & Lopez Garrido, A.C. (1985) Mineralogia y estratigrafla de sedimentos neogenos del Corredor de la Alpujarra (Cordillera Betica, Espaiia). Bol. Soc. Esp. Mineralogia,, 8, 307–318.Google Scholar
Puga, E. (1971) Investigaciones petroldgicas en Sierra Nevada. Ph, thesis. Univ. Granada, Spain.Google Scholar
Rodríguez Fernández, J. (1982) El Mioceno del sector central de las Cordilleras Beticas Ph. thesis, Univ. Granada, Spain.Google Scholar
Sanz de Galdeano, C., Rodríguez Fernandez, J. & Löpez Garrido, A.C. (1985) A strike-slip fault Corridor within the Alpujarra Mountains (Betic Cordilleras, Spain). Geol. Rund., 74, 641–655.Google Scholar
Sanz de Galdeano, C. Rodriguez Fern ndez, J. & Löpez Garrido, A.C. (1986) Tectonosedimentary evolution of the Alpujarran Corridor (Belie Cordilleras, Spain). Giornale di Geologia,, 48, 85–90.Google Scholar
Velilla, N. (1983) Los granates del Complejo de Sierra Nevada (Cordillera Betica)Ph. thesis, Univ. Granada, Spain.Google Scholar