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All Journal INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Journal of Geoscience Engineering and Energy (JOGEE)
Sulyana, Deska
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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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.  
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.
THE GENESIS OF JAKARTA AS A "BAY CITY" IN THE QUATERNARY PERIOD AND ITS IMPLICATIONS Jambak, Moehammad Ali; Susilo, Yves Belgiaswara; Nuryana, Suherman Dwi; Yuda, Himmes Putra; Amri, Muhammad Adimas; Setiawan, Naiy Salsabila; Sulyana, Deska; Lestari, Arini Dian; Jambak, Moehammad
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.20171

Abstract

Jakarta, the capital of Indonesia, is a coastal city shaped by geological and environmental processes over the past two million years of the Quaternary Period. The Jakarta Plain was formed by a mix of land sediments from the Cisadane and Citarum Rivers and marine sediments from the Java Sea. The southern region is a volcanic highland, while the city lies on lowlands with elevations ranging from 0 to 40 meters above sea level. Aims: to investigate the geological origin and sedimentary structure of the Jakarta Plain as a bay city situated between two major river deltas and to understand the implications of its geological development for spatial planning, environmental management, groundwater utilization, land subsidence, flood control, and coastal resource management, especially in the Jakarta Bay area, which features coral reef island ecosystems. Methodology and results: the research was conducted through field observations of geological outcrops and coral reef islands in Jakarta Bay, complemented by secondary data sources. The results indicate that the plain is filled by alternating layers of terrestrial and marine sediments, with strong geological connections to the surrounding Bodetabek region (Bogor, Depok, Tangerang, Bekasi). Conclusion, significance, and impact study: The study concludes that a thorough understanding of Jakarta’s sedimentary history is essential for mitigating geological risks and supporting sustainable urban development. Furthermore, Jakarta Bay’s coral reef islands hold considerable potential for tourism, underscoring the importance of integrated coastal and environmental planning based on sound geological insight.
Co-Authors Amri, Muhammad Adimas Budi Wijaya Fajar Hendrasto Jambak, Moehammad Jambak, Moehammad Ali Lestari, Arini Dian Maulana, Rizki Fajar Meirawaty, Mira Mohammad Apriniyadi Setiawan, Naiy Salsabila Suherman Dwi Nuryana Susilo, Yves Belgiaswara Yuda, Himmes Fitra Yuda, Himmes Putra