Geology and Geochemistry of  Batuan Gunungapi Walimbong Formation Balepe Area Tana Toraja Regency South Sulawesi Province

Virly Fakhriyah Uzdah Idham; Busthan Azikin; Adi Tonggiroh

doi:10.58227/jge.v4i1.195

Authors

Virly Fakhriyah Uzdah Idham Hasanuddin University
Busthan Azikin Hasanuddin University
Adi Tonggiroh Hasanuddin University

DOI:

https://doi.org/10.58227/jge.v4i1.195

Abstract

The study area is located in the Regional Geological Sheet of Majene and Western Palopo, precisely administratively, the research location is located in the Balepe Area, Malimbong Balepe District, Tana Toraja Regency, South Sulawesi Province and astronomically located at the coordinates 119°39'20' 'E - 119°43'20'' E (East Longitude) and 03°03'25'' S - 03°06'25'' S (South Latitude). The purpose of the study was to find out the type and affinity of magma, the naming of rocks based on chemical composition, and the evolution of magma in the study area. The methods used are field observations and data collection, petrographic analysis, and geochemistry using XRF (X-Ray Fluorescence spectrometry). The data was processed using GCDKIT Software. Based on the results of geochemical analysis on the four rock samples, the rock types were based on Total Alkaline Silica (TAS), namely trachy basalt, basalt, rhyolite, and dacite with magma affinity, namely Shoshonite Series and High-K calc-alkaline Series. Petrographic analysis in the form of naming rocks using the Pettijohn (1975) classification, namely lithic tuff, crystal vitric tuff, vitric crystal tuff, and vitric crystal tuff. The evolution of magma in the study area in the diagram of the variation of the content of major elements against SiO₂ compounds shows that some of the main elements are systematically differentiated and some are not systematic.

References

Aris, A. P., Mawaleda, M., Tonggiroh, A., Ninasafitri. (2023). Studi Geokimia Batuan Vulkanik Daerah Kolaka Utara Provinsi Sulawesi Tenggara. Makassar.

Bakosurtanal. (1991). Peta Rupa Bumi Indonesia Lembar Buakayu Skala 1 : 250.000. Bakosurtanal, Bogor.

Dirk, M. H. J. (2008). Petrologi-Geokimia Batuan Gunung Api Tampomas dan Sekitarnya. Bandung : Jurnal Geologi Indonesia, Vol. 3 No.1

Djuri., S., Bachri. S., Sukido. (1998). Peta Geologi Lembar Majene dan Bagian Barat Lembar Palopo, Pusat Penelitian dan Pengembangan Geologi, Bandung.

Fenton, C.L., Fenton, M.A. (1940). The Rock Book. New York: Doubleday Co Fisher, Richard V. (1966). Rocks composed of volcanic fragments and their classification. Earth-Science Reviews :Volume 1, Issue 4

Fisher R.V. & Schmincke, H.U. (1984). Pyroclastic Rocks, Springer-Verlag, Berlin.

Mustikayanti. (2021). Geokimia Batuan Plagiogranit Daerah Bulu Sarangnairi Kecamatan Barru Kabupaten Barru Provinsi Sulawesi Selatan. Makassar : Universitas Hasanuddin.

Rollinson, Hugh R. (1993). Using Geochemical Data : Evaluation, Presentation, Interpretation. Longman Singapore Publishers (Pte) Ltd, Singapore.

Tamaela, N. N., Astuti, T. L. R., Sugarbo, O. (2023). Geokimia Fragmen Breksi Andesit Peniron Pada Daerah Cendana Kabupaten Banjarnegara Jawa Tengah. Yogyakarta