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Ratna Husain
Universitas Hasanuddin
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Geokimia Granodiorit Latuppa Sulawesi Selatan Ratna Husain
Jurnal Geomine Vol 10, No 3 (2022): Edisi Desember 2022
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v10i3.1436

Abstract

SARI Lokasi penelitian Latuppa terletakdi Kecamatan Mungkajang, Palopo Sulawesi Selatan, merupakan daerah yang cukup penting untuk diteliti batuannya oleh karena dapat mengindikasikan keberadaan mineral yang cukup potensi untuk di tambang sebagai mineral yang ekonomis. Penelitian ini dimaksudkan untuk membuat analisis mencakup Petrogenesa dan Geotektonik Batuan Granodiorit. Berdasarkan analisis yang telah dilakukan secara megaskopis dan petrografi batuan granodiorite, tesktur kristanilitas holokristaslin, granularitas faneritik, fabrik bentuk euhedral-subhedral, relasi equigranular, struktur masif. Berdasarkan plotting kesebandingan berat (%) K2O dan SiO2 pada klasifikasi afinitas magma, maka seri magma yaitu High K Calc–Alkaline. Berdasarkan komposisi dari SiO2 dan Na2O + K2O bahwa jenis batuannya termasuk Granodiorit pada daerah penelitian termasuk ke dalam jenis peraluminious dan S-Type Granit, berdasarkan geokimia dan petrografi batuan granodiorit Latuppa terbentuk pada active continental margin.
Studi Provenance Endapan Pasir Sungai Budong-budong, Kabupaten Mamuju, Provinsi Sulawesi Barat Herni Suryani; Ratna Husain
Jurnal Azimut Vol 4 No 2 (2022): Volume 4, No.2
Publisher : Universitas Tamansiswa Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31317/jaz.v4i2.841

Abstract

The reseach area administratively located in Budong-budong District, Mamuju Regency, West Sulawesi Province. The purpose of this study is to determine the provenance of sand sediments at Budong-budong River based on petrographic analysis of QFL (quartz, feldspar and rock fragments) components. There are seven representative samples namely HRN/BD-01, HRN/BD-02, HRN/BD-03, HRN/BD-04, HRN/BD-05, HRN/BD-06, HRN/BD-07 that will be observed by its optical properties. Based on genetic classification (Krynine, 1963, in Folk, 1980) and empirical classification (Folk, 1980) of quartz mineral grains, there are three types of quartz that can be identified; 1). Monocrystalline quartz with a sub-equant to elongated shape, dark straight to oblique waves (originally from granite and gneiss); 2). Composite polycrystalline quartz with sub-equant to elongated shape, straight dark to slanted wavy, straight and crenulated boundaries between crystals (derived from recrystallized metamorphic rocks); 3) Composite polycrystalline quartz with elongated shape, strongly wavy darkening, and straight/smooth, crenulated, and granulated inter-crystal boundaries (derived from depressed metamorphic rocks). The source rock of the reseach area based on point-counting result of quartz, feldspar and rock fragments on the Dickinson & Suczek (1979) QFL triangle diagram was interpreted as a recycled orogen type.
Co-Authors Herni Suryani