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Chemical and mineralogical compositions of black shales (Middle Palaeozoic of the Central Pyrenees, Haute-Garonne, France)

Published online by Cambridge University Press:  05 July 2018

Francis Saupé  and
Ghislaine Vegas
Francis Saupé
Affiliation:
Centre de Recherches Pétrographiques et Géochimiques, BP 20, 54501 Vandœuvre-les-Nancy Cedex, France
Ghislaine Vegas
Affiliation:
Laboratoire de Minéralogie, 39 Allées Jules Guesde, 31400 Toulouse, France
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Abstract

The epicontinental sedimentary, epi- to mesozonal rocks of the Middle Palaeozoic of the Central Pyrenees host several economic Pb-Zn concentrations and numerous occurrences of these metals. The authors have endeavoured to recognize the original mineralogical nature of the epizonal host rocks in the concession of Baren (Haute-Garonne). Seventy-two whole-rock analyses were used for this purpose and interpreted by means of chemico-mineralogical diagrams.

These diagrams use parameters chosen so as to include in the projection planes the essential minerals forming the rocks under discussion. In this way, the nature and the possible initial mineralogical composition of the rocks, which are usually obliterated during metamorphism, are made visible. The chemical compositions of the different rock units are sufficiently typical to compensate for the absence of fossils and to allow stratigraphic identifications.

No volcanic contribution could be recognized in the pelites. The latter demonstrate the existence of a continent, undergoing a kaolinite-producing alteration, especially during the Silurian. The analysed trace elements (Ba, Cr, Cu, Ni, Pb, Rb, Sr, Th, U, V and Zn) are not enriched with respect to the clarkes for these rocks, except slightly in the case of U and Th and more strongly for Cr and V. The carbonate rocks contain predominantly calcite, with subordinate dolomite. They show a strong enrichment in Ba, whereas the content of the other trace elements is normal.

Keywords

black shalespalaeogeographic reconstructiongeochemistrysulphidesPyreneesFrance
Type
Petrology
Information
Mineralogical Magazine , Volume 51 , Issue 361 , September 1987 , pp. 357 - 369
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

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References

Aye, F., Oudin, E., and Pouit, G. (1981) Les minéralisations sulfurées du Paléozoique de Bretagne et des Pyrénées.Rapport BRGM 81 SGN 767 GMX., 26 pp.Google Scholar
Bartholomé, P. (1965) Ann. Soc. Géol. Belg. 92, 5-35.Google Scholar
Berry, W.B.N. and Wilde, P. (1978) Am. J. Sci. 278, 257-75.CrossRefGoogle Scholar
Brula, P. (1984) Les schistes noirs et la série paléozoique du dôme de Bosost (France, Haute-Garonne). Etude cartographique, pétrographique et géochimique. Relations avec les minéralisations Zn (Pb).Thése 3º cycle, Univ. Claude Bernard Lyon, 296 pp.Google Scholar
Cherkasov, G.N. (1973) Geologya Geofisika, (12) , 48–61.Google Scholar
Dallas, S. (1980) Etude gkologique et mindralogique des minéralisations zinciféres du Dévonien inférieur de la région du Lac d'Isaby (Hautes Pyrénées).Thése 3° cycle, Univ. Paul Sabatier Toulouse, 114 pp.Google Scholar
Degens, E.T. and Chilingar, G.V. (1967) In Diagenesis in Sediments (Larsen G. and Chilingar G.V., eds.).Developments in Sedimentology, 8, Elsevier, Amsterdam, 477–502.CrossRefGoogle Scholar
de La Roche, H. (1965) Geol. Rundschau, 55, 274-301.CrossRefGoogle Scholar
de La Roche, H. (1968) C.R. Ac. Sci. Paris, skr. D., 267, 39-42.Google Scholar
Destombes, J.P. (1953) Stratigraphie des terrains primaires de la Haute-Garonne. Comptes rendus, 19º Congrés géol. intern.Section 2, 2, 107-29.Google Scholar
Destombes, J.P. and Vaysse, A. (1947) Bull. Soc. Gbol. France, 17, 40349.Google Scholar
Dunoyer de, Segonzac G. (1969) Mérn. Serv. Carte géol. Als. Lorr. 29, 320 pp.Google Scholar
Ernst, W.G. (1971) Am. J. Sci. 270, 81-108.CrossRefGoogle Scholar
Escande, B., Permingeat, F., and Fortune, J.P. (1981) Minbralisation barytiques et leurs relations avec l'encaissant dans la région de Pierrefitte-Arrens (Hautes Pyrénbes).Rapport de I'A.C. Valorisation des Ressources du Sous-Sol, Contrat 78.7.0209.Google Scholar
Fert, D. (1976) Un aspect de la métallogénie du zinc et du plomb dans l'Ordovicien des Pyrknées centrales: le district de Sentein (Ariége, Haute-Garonne),Thése Dr. 3é cycle, Univ. P. et M. Curie, Paris, 196 pp.Google Scholar
Franqois, J.M. (1983) Etude géologique et mbtallogénique de la région du Pic du Midi de Bigorre (Hautes Pyrbnées). ThSse Dr. 3º cycle, INPL Nancy, 235 pp.Google Scholar
Fuganti, A. and Serpagli, E. (1968) Bol. Soc. Geol. ltal. 87, 51121.Google Scholar
Govindaraju, K., Mevelle, G., and Chouard, C. (1976) Anal. Chem. 48, 132-531.CrossRefGoogle Scholar
Graf, D.L. (1960) Illinois State Geol. Surv. Circ. 301, 71 pp.Google Scholar
Halferdahl, L.B. (1961) J. Petrol. 2, 49-135.CrossRefGoogle Scholar
Millot, G. (1964) Géologie des argiles. Masson, Paris, 499 pp.Google Scholar
Moine, B. (1974) Mdm. Sci. de la Terre, 31, 293 pp.Google Scholar
Moine, B. Prost, A., and Englund, J.O. (1974) Etude chimique d'une sbrie dbtritique: les sparagmites de Norvége du Sud, région du Lac Mosa.2éme R.A.S.T., Pont-g-Mousson, 291.Google Scholar
Pedro, G. (1968) Rev. Gdogr. phys. Gdol. dyn. 10, 457-70.Google Scholar
Pouit, G. and Alsac, C. (1978) C.R. Acad. Sci. Paris, 287, 415-18.Google Scholar
Puchelt, H. (1972) In Handbook of Geochemistry, 4 (Wedepohl, K.H., ed.) Springer- Verlag, Berlin. Chapter 56.Google Scholar
Puxeddu, M., Saup6, F., Dechomets, R., GianeUi, G., and Moine, B. (1984) Chem. Geol. 43, 77-113.CrossRefGoogle Scholar
Résler, H.J. and Lange, H. (1972) Geochemical Tables. Elsevier, Amsterdam, 2nd ed. 468 pp.Google Scholar
Sagon, J.P. (1976) Contribution àl'étude gbologique de la pattie occidentale du Bassin de Chateaulin (Massif armoricain): Stratigraphie, volcanisme, métamorphisme, tectonique.Thése Dr. Etat, Univ. P. et M. Curie, Paris, 671 pp.Google Scholar
Saupé, F. (1971) In Colloque Ordovicien Silurien-—Brest,B.R.G.M. Mém. 73, 335-65.Google Scholar
Saupé, F. (1973) Mém. Sci. de la Terre, 29, 342 pp.Google Scholar
Scotese, C., Bambach, R.K., Barton, C., Van der Voo, R., and Ziegler, A. (1979) J. Geol. 87, 217-77.CrossRefGoogle Scholar
Seslavinskiy, K.B. (1979) Int. Geol. Rev. 21, 14052.CrossRefGoogle Scholar
Shaw, D.M. (1956) Geol. Soc. Am. Bull. 67, 91934.CrossRefGoogle Scholar
Tamain, G. (1971) In Colloque Ordovicien Silurien—Brest, B.R.G.M. Mém. 73, 403-16.Google Scholar
Tardy, Y. (1969) Mbm. Serv. Carte géol. d'Als. Lorr. 31, 199 pp.Google Scholar
Vegas, G. (1982) Les mindralisations plombo-zincifdres de la concession de Baren (Haute-Garonne), leur contexte lithologique et géochimique.Thése Dr. 3º cycle, Univ. Paul Sabatier Toulouse, 148 pp.Google Scholar
Vine, J.D. and Tourtelot, E. (1970) Econ. Geol. 65, 253-72.CrossRefGoogle Scholar
von Engelhardt, W. (1967) In Diagenesis in Sediments (Larsen, G. and Chilingar, G.V., eds.). Developments in Sedimentology, 8, Elsevier, Amsterdam, 503-24.Google Scholar
Zwart, H.J. (1963) Geol. Rundschau, 52, 38-65.CrossRefGoogle Scholar