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All Journal Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti JUARA: JURNAL WAHANA ABDIMAS SEJAHTERA Journal of Geoscience Engineering and Energy (JOGEE)
Meirawaty, Mira
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Journal : Journal of Geoscience Engineering and Energy (JOGEE)

 1 
STUDI KARAKTERISTIK BATUAN METAMORF DAN MINERAL GRAFIT PADA BLOK TERATI KELOMPOK BALAISEBUT, KABUPATEN SANGGAU, KALIMANTAN BARAT : STUDY OF CHARACTERISTICS OF METAMORPHIC ROCKS AND GRAPHITE MINERAL IN THE TERATI BLOCK OF THE BALAISEBUT GROUP, SANGGAU DISTRICT, WEST BORNEO Sulyana, Deska; Meirawaty, Mira; Maulana, Rizki Fajar
Journal of Geoscience Engineering and Energy (JOGEE) VOLUME 5, NOMOR 2, AGUSTUS 2024
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jgw8b630

Abstract

Grafit merupakan mineral non-logam yang memiliki nilai ekonomis cukup tinggi. Mineral grafit merupakan mineral yang tersusun atas unsur karbon yang dapat hadir dibeberapa jenis batuan. Salah satu daerah yang memiliki potensi mineral grafit adalah daerah Kalimantan, tepatnya di Kabupaten Sanggau. Grafit pada daerah penelitian yaitu Terati hadir pada batuan metamorf dengan fasies greenschist termasuk pada kelompok metamorf regional. Sedangkan tipe endapan grafit pada daerah penelitian adalah flake graphite. Graphite is a non-metallic mineral that has quite high economic value. The mineral graphite is a mineral composed of the element carbon which can be present in several types of rocks. One area that has graphite mineral potential is the Kalimantan area, specifically Sanggau Regency. Graphite in the research area, namely Empi, is present in metamorphic rocks with greenschist facies, including in the regional metamorphic group. Meanwhile, the type of graphite deposit in the research area is flake graphite.  
STUDI ALTERASI DAN KARAKTERISTIK URAT KUARSA EPITERMAL SUBSURFACE DAERAH “X”, GUNUNG PONGKOR, KABUPATEN BOGOR, PROVINSI JAWA BARAT: STUDY OF SUBSURFACE EPITHERMAL QUARTZ VEIN ALTERATION AND CHARACTERISTICS “X” AREA, PONGKOR MOUNTAIN, BOGOR REGENCY, WEST JAVA PROVINCE Ihsan, Muhammad Naufal; Meirawaty, Mira; Wijaya, Budi
Journal of Geoscience Engineering and Energy (JOGEE) VOLUME 5, NOMOR 2, AGUSTUS 2024
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/8a8rj117

Abstract

Tekstur dan fasies urat yang beragam di daerah “X” menandakan daerah penelitian terbentuk dari beberapa fase mineralisasi, dengan setiap fasies memiliki hubungan yang berbeda dengan mineralisasi. Dengan melakukan pemetaan bawah permukaan dan core logging, peneliti berharap dapat menentukan karakteristik urat kuarsa meliputi meliputi litologi dan alterasi, tekstur dan fasies urat, serta hubungan tekstur urat dengan mineralisasi. Berdasarkan hal-hal tersebut, daerah penelitian berada pada zona bawah dari superzona crustifrom-colloform (CC). The diverse vein textures and facies in area "X" indicates that the study area was formed from several phases of mineralization, with each facies having a different relationship with mineralization. By conducting subsurface mapping and core logging, researchers hope to determine the characteristics of quartz veins based on lithology and alteration, vein texture and facies, as well as the relationship between vein texture and mineralization. Based on these things, the research area is in the lower zone of the crustifrom-colloform (CC) superzone.
KARAKTERISTIK ALTERASI SKARN DAN DISTRIBUSI MINERAL SULFIDA PEMBAWA TEMBAGA DI TAMBANG BIG GOSSAN LEVEL 2860L-2940L FOOTWALL WEST, PAPUA, INDONESIA: CHARACTERISTICS OF SKARN ALTERATION AND SULPHIDE MINERAL BEARING COPPER DISTRIBUTION AT BIG GOSSAN MINE 2860L-2940L FOOTWALL WEST, PAPUA, INDONESIA Amalina, Nur; Meirawaty, Mira; Sonbait, Daniel; Burhannudinnur, Muhammad; Hafiz, Surya Darma; Rendy; Koesmawardani, Wildan Tri; Wijaya, Budi
Journal of Geoscience Engineering and Energy VOLUME 6, NOMOR 1, FEBRUARI 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v6i1.22289

Abstract

Tambang Big Gossan di Papua Tengah dikenal dengan mineralisasi tembaga yang terbentuk akibat intrusi diorit pada batuan karbonatan Formasi Waripi. Penelitian ini bertujuan menganalisis karakteristik alterasi dan mineralisasi tembaga di level 2860, 2900, dan 2940 Footwall West. Metode yang digunakan termasuk pemetaan geologi dan analisis laboratorium (petrografi, mineragrafi, dan XRD). Hasilnya, ditemukan empat satuan litologi serta lima zona alterasi, yaitu klinopiroksen-garnet-kuarsa, epidot-klorit-kuarsa-kalsit, garnet-kuarsa-kalsit-piro pilit-epidot, piropilit-kuarsa-kalsit, dan aktinolit-kuarsa-klorit. Mineral sulfida tembaga utama adalah kalkopirit dan bornit, dengan pirit, pyrrhotite, dan magnetit sebagai mineral pembawa besi. Tembaga terakumulasi pada zona retrograde alterasi 2, 3, 4, dan 5. The Big Gossan mine in Central Papua is known for its copper mineralization, formed due to diorite intrusion into the carbonate rocks of the Waripi Formation. This study aims to analyze the characteristics of alteration and copper mineralization at levels 2860, 2900, and 2940 Footwall West. The methods used include geological mapping and laboratory analyses (petrography, mineragraphy, and XRD). The results revealed four lithological units and five alteration zones: clinopyroxene-garnet-quartz, epidote-chlorite-quartz-calcite, garnet-quartz-calcite-pyrophyllite-epidote, pyrophyllite-quartz-calcite, and actinolite-quartz-chlorite. The main copper sulfide minerals are chalcopyrite and bornite, with pyrite, pyrrhotite, and magnetite as iron-bearing minerals. Copper is concentrated in the retrograde alteration zones 2, 3, 4, and 5.
A REVIEW OF GEOPHYSICS STUDY OF GRAPHITE OCCURRENCES IN BALAI SEBUT COMPLEX, SANGGAU, WEST KALIMANTAN Maulana, Rizki Fajar; Sulyana, Deska; Meirawaty, Mira; Yuda, Himmes Fitra; Hendrasto, Fajar; Wijaya, Budi; Apriniyadi, Mohammad
Journal of Geoscience Engineering and Energy VOLUME 6, NOMOR 1, FEBRUARI 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v6i1.22455

Abstract

Graphite is a non-metallic polymorph mineral formed by carbon. Graphite has become indispensable in the worldwide industry due to its widespread applications, such as industrial uses, energy transition, and even electricity. It is a critical anode element for lithium-ion batteries. Graphite has unique physical characteristics. It has a very low specific gravity and is an extraordinarily soft but highly conductive material. It is exceptionally heat-resistant, making it applicable in metallurgy and manufacturing. Due to all characteristics, graphite occurrences in Indonesia are slightly unknown. In contrast, there is a possibility, according to some Palaeozoic metamorphic host graphite in several parts of Indonesia. This study will enlighten early-step exploration of graphite potency in Balai Sebut, Sanggau Regency, and West Kalimantan. We combined airborne and ground geophysics using Active Directory Magnetotelluric (ADMT) tools to estimate graphite distribution on the surface and subsurface. We also did laboratory analysis to validate graphite content using petrography analysis, X-ray diffraction (XRD), and carbon analyzer (LECO) of some representative graphite-bearing rock from fieldwork. Graphite in the research area is exposed to the surface, like in Empiyang, whereas potential graphite in the Terati area lies 0-6 m below the subsurface. Petrographic analysis shows that graphite occurs as flake graphite that is characterized by widespread distribution with low thickness. Both LECO and XRD confirmed the occurrence of these graphite-bearing rocks, with the total amount of graphite ranging from 0.91‒1.58%. This research is expected to provide suggestions in the early stage of graphite exploration based on thematic cases as graphite occurrences in the Balai Sebut area.
Co-Authors Amri, Muhammad Adimas Atthariqh, Muhammad Kresna Budi Wijaya Cahyaridipura, Muhammad Ery Fajar Hendrasto Fakhmi, Nyco Guntoro, Agus Hafiz, Surya Darma Harry Pramudito, Harry Ihsan, Muhammad Naufal Imam Setiaji Ronoatmojo Koesmawardani, Wildan Tri Maulana, Rizki Fajar Mohammad Apriniyadi Muhammad Burhannudinnur Nur Amalina Rahmadio, Kefi Rendy Sonbait, Daniel Sugiarto, Eddy Sulyana, Deska Sumotarto, Untung Yuda, Himmes Fitra ‘Afin, Lalita