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Mikrokonkrecje syderytowe w holoceńskich osadach ujścia rzeki Gwadiana w Portugalii : raport wstępny

Treść / Zawartość
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Warianty tytułu
EN
Micro-scale sideritic concretions in Holocene sediments in the Guadiana estuary, Portugal : a preliminary report
Języki publikacji
PL
Abstrakty
EN
The authors described micro-scale carbonate concretions occurring at a depth of about 41 m within Holocene sandy sediments filling the Guadiana River paleovalley, representing the transitional fluvial- -estuarine facies. Despite their minute sizes, the micro-concretions show a complex internal structure. Regular distribution of Mg, Mn and Ca can be assigned to a chemical zoning, pointing to precipitation under varying chemical conditions. Based on morphological and chemical peculiarities, four types of concretions can be distinguished. Detrital Fe-Mg-carbonates form nuclei. At first, Mn-rich carbonate precipitated as a coating, which is coherent with the sequence of precipitation of carbonates associated with bacteria-mediated oxidation of organic matter. Subsequently, the main bodies of concretions precipitated as Fe-carbonate (siderite). The last precipitation episode is marked by enrichment in Ca. The XRD patterns show the presence of a mixture of discrete carbonate phases.
Rocznik
Strony
568--575
Opis fizyczny
Bibliogr. 27 poz., rys.
Twórcy
  • Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy, ul. Rakowiecka 4, 00-975 Warszawa
autor
  • Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
autor
  • Centro de Investigação Marinha e Ambiental, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
Bibliografia
  • 1. ALIOTTA D., DERRON A., RODRIGUES R., MEHLHORN J. & EYER P. 2002 - Seminario Sobre Inundaęoes em Portugal, Swiss Re Zurich [http://snirh.pt/snirh/download/relatorios/ cheias_inundacoes_portugal.pdf, stan na 17.04.2012].
  • 2. BASSINOT F.C., MÉLIÉRES F., GEHLEN M., LEVI C. & LABEYRIE L. 2004 - Crystallinity of foraminifera shells: a proxy to reconstruct past bottom water CO3= changes? Geochem. Geophys. Geosyst., 5, Q08D10 [doi:10.1029/2003GC000668].
  • 3. BERNARDO J.M., ILHÉU M., MATONO P. & COSTA A.M. 2003 - Interannual variation of fish assemblage structure in a Mediterranean river: implications of streamflow on the dominance of native or exotic species. River Res. Applic., 19: 521-532.
  • 4. BOJANOWSKI M.J. & CLARKSON E.N.K. 2012 - Origin of siderite concretions in microenvironments of methanogenesis developed in a sulfate reduction zone: an exception or a rule? J. Sediment. Res., 82: 585-598.
  • 5. BOSKI T., CAMACHO S., MOURA D., FLETCHER W., WILAMOWSKI A., VEIGA-PIRES C., CORREIA V., LOUREIRO C. & SANTANA P. 2008 - Chronology of the sedimentary processes during the postglacial sea level rise in two estuaries of the Algarve coast, Southern Portugal. Estuar. Coast. Shelf Sci., 77: 230-244.
  • 6. CHAI L. & NAVROTSKY A. 1996 - Synthesis, characterization, and enthalpy of mixing of the (Fe,Mg)CO3 solid solution. Geochim. Cosmochim. Acta, 60: 4377-4383.
  • 7. CHOI K.S., KHIM B.K. & WOO K.S. 2003 - Spherulitic siderites in the Holocene coastal deposits of Korea (eastern Yellow Sea): elemental and isotopic composition and depositional environment. Mar. Geol., 202: 17-31.
  • 8. CURTIS C.D. & COLEMAN M.L. 1986 - Controls on the precipitation of early diagenetic calcite, dolomite and siderite concretions in complex depositional sequences. [W:] Gautier D.L. (red.) Roles of organic matter in sediment diagenesis. SEPM Spec. Publ., 38: 23-33.
  • 9. CURTIS C.D., COLEMAN M.L. & LOVE L.G. 1986 - Pore water evolution during sediment burial from isotopic and mineral chemistry of calcite, dolomite and siderite concretions. Geochim. Cosmochim. Acta, 50: 2321-2334.
  • 10. DABRIO C.J., ZAZO C., GOY J.L., SIERRO F.J., BORJA F., LARIO J., GONZÁLEZ J.A. & FLORES J.A. 2000 - Depositional history of estuarine infill during the last postglacial transgression (Gulf of Cádiz, Southern Spain). Mar. Geol., 162: 381-404.
  • 11. DE CRAEN M., SWENNEN R., KEPPENS E.M., MACAULAY C.I. & KIRIAKOULAKIS K. 1999 - Bacterially mediated formation of carbonate concretions in the Oligocene Boom Clay of Northern Belgium. J. Sediment. Res., 69: 1098-1106.
  • 12. DELGADO J., BOSKI T., NIETO J.M., PEREIRA L., MOURA D., GOMES A., SOUSA C. & GARCÍA-TENORIO R. 2012 - Sea-level rise and anthropogenic activities recorded in the late Pleistocene/ Holocene sedimentary infill of the Guadiana Estuary (SW Iberia). Quat. Sci. Rev., 33: 121-141.
  • 13. FROELICH P.N., KLINKHAMMER G.P., BENDER M.L., LUEDTKE N.A., HEATH G.R., CULLEN D., DAUPHIN P., HAMMOND D., HARTMAN B. & MAYNARD V. 1979 - Early oxidation of organic matter in pelagic sediments of the eastern equatorial Atlantic: suboxic diagenesis. Geochim. Cosmochim. Acta, 43: 1075-1090.
  • 14. HERNÁNDEZ-MOLINA F.J., SOMOZA L., REY J. & POMAR L. 1994 - Late Pleistocene-Holocene sediments on the Spanish continental shelves: model for very high resolution sequence stratigraphy. Mar. Geol., 120: 129-174.
  • 15. KRUMM S. 1994 - WINFIT1.0 - a public domain program for interactive profile-analysis under WINDOWS. XIIIth Conference on Clay Mineralogy and Petrology, Praha. Acta Univ. Carolinae Geol., 38: 253-261.
  • 16. KRUMM S. 1996 - An interactive Windows program for profile fitting and size/strain analysis. Mat. Sci. Forum, 228-231: 183-188.
  • 17. MATA M.P., TABERNER C., JULIÁ R., TEAGLE D.A.H., REJAS M., GIBERT J.M. DE, ALFONSO P., PÉREZ-OUTEIRAL F., DÍAZ DEL RÍO V. & SOMOZA L. 2005 - Microbial-mediated carbonates in the Gulf of Cádiz: data of Ibérico, Hespérides, Cornide and Fila de Hormigas. Geophys. Res. Abstr., 7, 04528.
  • 18. MORAD S. & ESHETE M. 1990 - Petrology, chemistry and diagenesis of calcite concretions in Silurian shales from central Sweden. Sediment. Geol., 66: 113-134.
  • 19. MORALES J.A. 1997 - Evolution and facies architecture of the mesotidal Guadiana River delta (SW Spain-Portugal). Mar. Geol., 138: 127-148.
  • 20. MORTIMER R.J.G. & COLEMAN M.L. 1997 - Microbial influence on the oxygen isotopic composition of diagenetic siderite. Geochim. Cosmochim. Acta, 61: 1705-1711.
  • 21. MOZLEY P.S. 1989a - Relation between depositional environment and the elemental composition of early diagenetic siderite. Geology, 17: 704-706.
  • 22. MOZLEY P.S. 1989b - Complex compositional zonation in concre¬tionary siderite; implications for geochemical studies. J. Sediment. Petrol., 59: 815-818.
  • 23. MOZLEY P.S. & CAROTHERS W.W. 1992 - Elemental and isotopic compositions of siderite in the Kuparuk Formation, Alaska; effect of microbial activity and water/sediment interaction on early pore-water chemistry. J. Sediment. Petrol., 62: 681-692.
  • 24. PÉREZ A., LUZÓN A., ROC A.C., SORIA A.R., MAYAYO M.J. & SÁNCHEZ J.A. 2002 - Sedimentary facies distribution and genesis of a recent carbonate-rich saline lake: Gallocanta Lake, Iberian Chain, NE Spain. Sediment. Geol., 148: 185-202.
  • 25. PORTELA L.I. 2006 - Calculation of sediment delivery from the Guadiana Estuary to the coastal ocean. J. Coast. Res., Spec. Issue 39: 1819-1823.
  • 26. PYE K., DICKSON J.A.D., SCHIAVON N., COLEMAN M.L. & COX M. 1990 - Formation of siderite-Mg-calcite-iron sulphide concretions in intertidal marsh and sandflat sediments, north Norfolk, England. Sedimentology, 37: 325-343.
  • 27. REEDER R.J. 1983 - Crystal chemistry of the rhombohedral carbonates. Rev. Miner. Geochem., 11: 1-47.
  • 28. REY D., MOHAMED K.J., BERNABEU A., RUBIO B. & VILAS F. 2005 - Early diagenesis of magnetic minerals in marine transitional environments: geochemical signatures of hydrodynamic forcing. Mar. Geol., 215:215-236.
  • 29. SAMPATH D.M.R., BOSKI T., SILVA P.L. & MARTINS F.A. 2011 - Morphological evolution of the lower Guadiana Estuary and its intertidal zone in response to the projected sea-level rise and sediment supply reduction scenarios. J. Quat. Sci., 26: 156-170.
  • 30. THOMSON J., HIGGS N.C., CROUDACE I.W., COLLEY S. & HYDES D.J. 1993 - Redox zonation of elements at an oxic/ post-oxic boundary in deep-sea sediments. Geochim. Cosmochim. Acta, 57: 579-595.
  • 31. WILAMOWSKI A. & BOSKI T. 2004 - Identification of sedimentation episodes caused by catastrophic floods based on mineralogical analysis of Holocene deposits in two estuaries in Southern Portugal: Boina and Arade-Odelouca. Mineralogia Spec. Pap., 24: 393-396.
  • 32. WILKINSON M., HASZELDINE R.S., FALLICK A.E. & OSBORNE M.J. 2000 - Siderite zonation within the Brent Group: microbial influence or aquifer flow? Clay Miner., 35: 107-117.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-98e692ed-19a6-4d61-b6a0-0321f41c38b2
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