La importancia de los sistemas turbidíticos en el ámbito petrolero en México, se puede observar en los campos existentes en la Cuenca de Chicontepec, formado durante el Periodo Terciario, siendo muy importante desde el punto de vista sedimentológico, tectónico y económico, ya que los espesores considerables son rocas clásticas de origen turbidítico. Por esta razón, es necesario comprender como se forman los sistemas y sus características como turbiditas así como el conocer la estructura y contenido biocronológico para el desarrollo de estrategias de exploración. De este modo, la bioestratigrafía y otros elementos asociados son actualmente el objetivo de los estudios del petróleo.
ABSTRACT
The importance of turbidite systems in the oil sector in Mexico, can be
observed in the existing fields in the Chicontepec Basin, formed during the Tertiary
Period, being very important from the point of sedimentology, tectonics and
economically, since the thicknesses considerable are clastic rocks of turbidite origin.
For this reason, it is necessary to understand how the systems and their
characteristics as well as turbidites know the structure and content biochronology to
develop exploration strategies. Thus, biostratigraphy and other associated elements
are currently the target of oil companies.
Sometimes these sediments have not been dated because of the complexity
and poor conservation of fossil content (planktonic foraminifera), because they are
scarce or absent; for that reason nanoplancton calcareous has been incorporated in
recent years and it has gained great relevance globally within the biostratigraphic
research in a large number of organizations, extensive geographical distribution,
evolutionary changes Nannofossils, being a good indicator of climate change and as
a chronostratigraphic tool to establish correlations between various sedimentary
columns.
Due to a lack of information and economic interest of the Chicontepec Basin
sampling and further processing of nanoplancton calcareous was made, many
micropaleontological data, curves diversity, abundance and rework to interpret the
outcrops obtained also if they correspond to the lower Eocene age subdivided into
the NP11 and NP12 biozones (Perch-Nielsen, in Bolli, 1985) with the presence of
nannoflora index as: Zygrhablithus bijugatus, Discoaster deflandrei, Sphenolithus
anarrhopus, Toweius rotundus, S. arthurii, Ericsonia formosa and Tribrachiatus
orthostylus. The nannoflora recrystallised was presented and mostly poorly
preserved.
Key words: Micropaleontology, Stratigraphy, Bioestratigraphy, Surface sections,
Calcareous nanoplankton, biocostratigraphic correlation, Chicontepec Formation,
nanoflora, biozones, shales, Zygrhablithus bijugatus, Discoaster deflandrei,
Sphenolithus anarrhopus, Toweius rotundus, S. arthurii, Ericsonia formosa y
Tribrachiatus orthostylus.
