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Speleothem Architectural Analysis: towards a standardized stratigraphy in stalagmite-based paleoclimate research

AuthorsMartín-Chivelet, J. ; Muñoz-García, M. Belén; Cruz, J. A.; Ortega, Ana Isabel; Turrero, M. J.; López-Elorza, M.
Issue Date22-May-2017
Citation8th International Conference Climate Change: The Karst Record (2017)
AbstractReliable paleoclimate time series based in stalagmites require the precise characterization of speleothem internal micro-stratigraphy, a task too often poorly accomplished despite the recent advances in speleothem research. This weakness is probably due to the lack of a robust integrative methodological framework capable of integrating the wide range of petrographic and micro-stratigraphic methods currently used in speleothem characterization. For covering this need, we propose the Speleothem Architectural Analysis (SAA), a holistic approach inspired in well-stablished stratigraphic procedures such as the architectural element analysis and the sequence stratigraphy, commonly used by geoscientists for categorizing the stratigraphy of sedimentary deposits. The SAA approach establishes a six-fold hierarchy of speleothem architectural elements and their bounding surfaces: individual crystallites (1st order), single growth layers (2nd order), speleothem fabrics (3rd order), stacking patterns sets (4th order), morphostratigraphic units (5th order), unconformity-bounded units and major unconformities (6th order). Each category of architectural element is formed in a different range of time, from seasons or years to centuries or millennia. The method provides an open and versatile tool for unravelling the complexities of speleothem growth. It generates a standardized stratigraphic framework for each stalagmite, which can be the basis for its genetic interpretation in a multi-temporal scale. This stratigraphic analysis must precede and accompany any geochemical work directed to the construction of paleoclimate series
DescriptionTrabajo presentado en el 8th International Conference Climate Change: The Karst Record, celebrado en Austin, Texas (Estados Unidos), del 21 al 24 de mayo de 2017
Appears in Collections:(IGEO) Comunicaciones congresos
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