Early Paleozoic schists in the Green Quarry (35°04´S- 65°28´O), Southern San Luis: U-Pb SHRIMP ages and geodynamic implications.

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Carlos J. Chernicoff
João O. S. Santos
Eduardo O. Zappettini
Neal J. Mcnaughton

Abstract

At the Green quarry, southern San Luis province, there are scarse exposures of medium grained quartz-plagioclase-biotite schists of sedimentary origin. These outcrops are bounded to the east by a major N-S trending (Lonco Vaca) fault. U-Pb SHRIMP dating of 42 detrital zircons indicate that most grains are Neoproterozoic (n=20) and Cambrian (n=13). The age of the youngest detrital zircon is ca 500 Ma, which corresponds to the maximum age for the onset of sedimentation, indicating that deposition occurred during the Upper Cambrian- Ordovician. Equivalent and coeval metasediments are exposed in the sierra Lonco Vaca (La Pampa province). The metasediments of the San Luis Formation would also be equivalent and partly contemporaneous.

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How to Cite
Chernicoff, C. J. ., Santos, J. O. S., Zappettini, E. O., & Mcnaughton, N. J. (2007). Early Paleozoic schists in the Green Quarry (35°04´S- 65°28´O), Southern San Luis: U-Pb SHRIMP ages and geodynamic implications. Revista De La Asociación Geológica Argentina, 62(1), 154-158. Retrieved from https://revista.geologica.org.ar/raga/article/view/1164
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Communications

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