Contributions to the age knowledge of plutonic, hypabyssal and volcanoclastic igneous bodies outcropping in the Pailitas town area (Cesar, Colombia)
Published 2020-05-28
Keywords
- Colombia,
- Magmatic arc,
- Norean Formation,
- U-Pb Geochronology
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Abstract
In the Pailitas town area (Cesar Department), located between the Eastern and Central Colombian mountain ranges, outcrop mostly Precambrian (at high- and low-grade metamorphism) and Mesozoic rocks (plutonic, hypabyssal, volcanoclastic, volcano-sedimentary and continental sedimentary), these last ones grouped into the so-call Norean Formation.
The relatively wide space distribution of this unit, the relationship of its lithologies, the crystallization ages of its related-plutonic and hypabyssal rocks (zircon U-Pb ages of 176.7±2.2 Ma and 176.0±2.1 Ma, respectively), as well as the maximum stratigraphic age of the associated-volcano-sedimentary rocks (with the youngest detrital zircons U-Pb ages´ peak at about 190 Ma), suggest this unit was formed in an extensive tectonic environment, which allowed the development of volcano-plutonic systems and simultaneously the deposition of continental sediments. In the regional context, it is possible to relate in time the igneous lithologies outcropping in the Pailitas town area with the calco-alkaline magmatic arc of Early-Middle Jurassic age, today represented in the coeval igneous bodies outcropping in the Sierra Nevada de Santa Marta, Norosí, San Martín, San Lucas, Ibague areas.
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References
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