Microfacies and Depositional Environment: Pamutuan Formation, Calcarenite Member, Selasari Area, Parigi Subdistrict, Pangandaran, West Java

Teti Syahrulyati; Margaretha Rutsela Shindra Kotouki

doi:10.55927/ijsmr.v4i4.28

Authors

Teti Syahrulyati Universitas Pakuan
Margaretha Rutsela Shindra Kotouki Universitas Pakuan

DOI:

https://doi.org/10.55927/ijsmr.v4i4.28

Keywords:

Calcarenite Member of the Pamutuan Formation, Microfacies, petrography, diagenesis

Abstract

This journal provides an overview of the limestone facies model for the calcarenite member of the Pamutuan Formation. This limestone is quite well exposed in the southern part of Java Island, in Pangandaran Regency. The primary data for this study were obtained from 53 rock outcrops, within which there were 4 measured stratigraphic sections: the Selasari Traverse, the Bangunkarya Traverse, the Cimanggu Traverse, and the Kersaratu Traverse. One of these sections was analyzed using 3 samples that had been petrographically tested for microfacies analysis. The research results indicate that the Kalkarenit Member of the Pamutuan Formation is composed of clastic carbonate rocks. Microfacies analysis shows that the carbonate rocks generally consist of two facies zones according to the Facies Zone results: the inner part of the shelf or open sea (FZ7) and the inner part of the restricted shelf (FZ8). Various diagenetic processes occur after rock deposition, including cementation, micritization, compaction, neomorphism, and dissolution.

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