Publication: Componentes orgánicos estructurados en sedimentos carbonosos. Técnicas de estudio.
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2008
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Instituto Geológico y Minero de España
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Abstract
Para tener una visión global de los componentes bióticos de los sedimentos carbonosos las técnicas de estudio tienen una gran importancia. Las muestras se pueden englobar en ceras o resinas sintéticas y así poder preparar posteriormente secciones pulidas que permitan identificar sus componentes microscópicos (litotipos) y microscópicos (macerales). Estos constituyen las entidades microscópicas más pequeñas reconocibles en el carbón. También es posible realizar estudios palinológicos en los sedimentos carbonosos. Para ello, existe una técnica específica que consiste en el ataque de las muestras con reactivos químicos con el fin de eliminar la materia mineral de la roca, quedando un residuo palinológico formado por microfósiles vegetales, algares, hongos y zoopalinomorfos. Se citan tres ejemplos prácticos de utilización de estas técnicas en carbones de diferentes rangos.
The structured compounds of sedimentary organic matter can be studied by petrological and palynological techniques for a full kwnoledge of depositional conditions. In the petrographycal study the samples are embedded in wax and synthetic resins and subsequently to prepare polished sections that allows ¡dentify the macroscopic (lithotypes) and distinct microscopic organic entities called macerals and microlithotypes. To, the palynological assemblages in this coal sediments can be studied. The samples require acid attack for digestion of the inorganic matrix. This palynological residue consist in spores, pollen grains, cutícles, algal and zoomorphs microrest. Three examples of this technical procedures in differents types of coals are considered.
The structured compounds of sedimentary organic matter can be studied by petrological and palynological techniques for a full kwnoledge of depositional conditions. In the petrographycal study the samples are embedded in wax and synthetic resins and subsequently to prepare polished sections that allows ¡dentify the macroscopic (lithotypes) and distinct microscopic organic entities called macerals and microlithotypes. To, the palynological assemblages in this coal sediments can be studied. The samples require acid attack for digestion of the inorganic matrix. This palynological residue consist in spores, pollen grains, cutícles, algal and zoomorphs microrest. Three examples of this technical procedures in differents types of coals are considered.