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The coal deposit of Tibita, Colombia; geologic and coal petrographic investigation

, : The coal deposit of Tibita, Colombia; geologic and coal petrographic investigation. International Journal of Coal Geology 10(4): 361-382

The coal deposit of Tibita is located 90 km NNE of Bogota and is part of the more than 600-km-long coal belt of Colombia's East Cordillera. There are up to 10 mineable coal seams of around 1 m thickness each within the Upper Cretaceous/Early Tertiary Guaduas formation. The coal measures were folded during the Andean orogeny and were preserved in SW-NE-extending synclines. Despite its low rank (35–45% VM) some of the coal possesses good coking properties. The exinite-poor coal shows a number of petrographic pecularities. It largely consists of the rare microlithotype vitrinertite and is lacking in durite and clarodurite. Macroscopically, the coal is mostly homogeneous. Two major lithotypes are described here, i.e. layered and unlayered coal. It was by means of microlithotype analysis, that whole-seam-sample sequences of several boreholes could be correlated successfully. Thus coal reserves could be reliably estimated.


DOI: 10.1016/0166-5162(88)90010-9

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