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All Journal Jurnal Teknik Sipil Jurnal Locus Penelitian dan Pengabdian International Journal of Hydrological and Environmental for Sustainability Hexatech: Jurnal Ilmiah Teknik Asian Journal of Social and Humanities
Anjarwati, Retno
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Transportation

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Geochemical and Mineralogical Insights into Hydrothermal Alteration in the Beruang Kanan Non-Vulcanic Area, Central Kalimantan, Indonesia Anjarwati, Retno; Sutarto, Sutarto; Yudiantoro, Dwi Fitri; Idrus, Arifudin; Umar, Emi Prasetyawati
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 2 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i2.767

Abstract

Previous studies have revealed significant hydrothermal alterations within the Beruang Kanan Non-Volcanic Area, Central Kalimantan, Indonesia, resulting in extensive ore mineralizations. This study aims to examine the effects of hydrothermal processes on rock alteration, delineate alteration zones, and establish their relationship to metal mineralization. The research area, situated in the Tumbang Miri district of Gunung Mas regency, forms part of the Corrugated Hills Geomorphological Unit and is traversed by the Schwaner Mountains, with elevations ranging from approximately 50 to 400 meters. Stratigraphic analysis identifies three primary rock units, ordered from oldest to youngest: the Tuffaceous Sandstone Unit, the Dacitic Tuff Unit, and the Andesite Unit. Hydrothermal alterations have resulted in three distinct alteration zones sericitic, argillic, and propylitic characterized by secondary mineral assemblages. This study provides a comprehensive framework for understanding the geological and mineralization dynamics of non-volcanic hydrothermal systems in Central Kalimantan, Indonesia
Study of Element Abundance in Volcanic Rocks in the Beruang Kanan Region, Gunung Mas Regency, Central Kalimantan Anjarwati, Retno; Sutarto, Sutarto; Yudiantoro, Dwi Fitri; Idrus, Arifudin
Asian Journal of Social and Humanities Vol. 2 No. 10 (2024): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i10.356

Abstract

Soil elements, based on their abundance in the earth's crust and petrogenetic analysis aim to divide soil elements into several groups, namely major elements, trace elements and rare earth elements (REE). The research location is located in the Beruang Kanan area, Tumbang Miri District, Gunung Mas Regency, Central Kalimantan Province. The major elements and trace elements of the host rock were obtained from X-ray fluorescence (XRF) analysis and Plasma-Coupled Mass Spectrometry (ICP-MS) methods. Volcanic rocks from the Kanan Bear prospect The volcanic magmatic affinity in the study area is calc-alkaline this chemical characteristic is clearly reflected by the type of volcanic rock which is determined based on its chemical classification, which is generally igneous rock of the calc-alkaline magma series type so it is interpreted to originate from a convergent tectonic environment continental edge.
IDENTIFICATION OF SEA LEVEL RISE BASED ON TIDAL DATA USING THE LEAST SQUARE METHOD Anjarwati, Retno; Danial, Mochammad Meddy; Lestari, Arfena Deah; Meirany, Jasisca; Supriyadi, Asep
Jurnal Teknik Sipil Vol 23, No 4 (2023): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i4.66656

Abstract

Flood occurs when water overflows its banks due to inadequate channel capacity. Flooding typically results from too much precipitation, which prevents the channel from handling the water flow and results in a deluge. Pontianak City frequently faces severe and protracted flooding when it rains. Both high rainfall and rising sea levels, which impact the Kapuas River, might result in flooding. This argument states that this study was done to anticipate sea level rise for the next six years, which will impact Pontianak City's water flow height using tidal data from Pontianak's Climatology Maritime Station from 2016 to 2021. The average rate of sea level rise, calculated using the least squares approach, is 1.579 cm/year. With an increase rate of 0.017 cm/year, the average sea level rise forecast for the Kapuas River for the next six years is 1.789 cm. It will be necessary to reduce floods in the future to avoid the effects of water flow.
Affinity Study and Rock Types in the Beruang Kanan Area, Central Kalimantan Anjarwati, Retno; Sutarto, Sutarto; Yudiantoro, Dwi Fitri; Idrus, Arifudin
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 11 (2025): JURNAL LOCUS: Penelitian dan Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i11.4847

Abstract

The mineralizing bearing rocks on the Right Bear prospect are andesite. Geochemical data of rocks indicate that they are classified as intermediate igneous rocks rich in silica. The composition of andesite silica is approximately 60% with a total alkali (Na+K) of about 3.6%. Based on this data, it is known that the dacite affinity is calc-alkaline. The volcanic rocks of the Right Bear prospect are primarily andesite. This study aims to determine the affinity of magma and geochemical characteristics of volcanic rocks in the Beruang Kanan area, Central Kalimantan, as the basis for the interpretation of tectonic settings and mineralization potential. Geochemical analysis was carried out using the X-Ray Fluorescence (XRF) method for the main oxide element and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) for trace elements. Samples that have an LOI value of less than about 2% by weight are assumed to be unaltered or fresh rocks and these rocks are generally characterized by the presence of relative euhedral phenocrites and mineral grains and the absence of secondary hydrothermal minerals. The results of the comparison of Co and Th (Hastie, et al., 2007) on samples of fresh/slightly altered rocks and completely altered rocks are included in the affinity of magma of the alkaline limestone type. The results of the comparison of Zr/Y and Th/Yb (Ross & Bedard, 2009) show that samples of fresh rocks and altered rocks are included in the affinity of magma of the alkaline calcage series. Based on the results of the plotting of some of the above methods, it can be concluded that the magma affinity of the Beruang Kanan area belongs to the type of alkaline limestone which can be interpreted as being related to the within plate (in the plate) in the form of a continental expansion zone. This finding has important significance for the exploration of Cu-Au epithermal-porphyry mineralization in the Central Kalimantan region, given that rocks with calc-alkaline affinity in the within plate setting are often associated with economical mineralization systems.
Review prospek mineral polimetalik di Kalimantan Timur Anjarwati, Retno
Hexatech: Jurnal Ilmiah Teknik Vol. 4 No. 2 (2025): Hexatech: Jurnal Ilmiah Teknik
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/hexatech.v4i2.2151

Abstract

Kalimantan Timur memiliki potensi sumber daya mineral kritis yang berperan penting dalam mendukung transisi energi Indonesia menuju teknologi rendah karbon. Penelitian ini dilakukan melalui studi literatur geologi regional, analisis data eksplorasi dari publikasi teknis dan peta sumber daya mineral, serta interpretasi kondisi geotektonik yang mempengaruhi pembentukan endapan mineral. Telaah kebijakan energi nasional dan strategi hilirisasi turut dilakukan untuk menilai peluang penguatan rantai pasok industri berbasis mineral kritis. Hasil kajian menunjukkan bahwa mineral polimetalik di Kalimantan Timur, seperti nikel, mangan, dan unsur tanah jarang (REE), memiliki prospek signifikan dalam mendukung kebutuhan energi masa depan. Penguatan infrastruktur pengolahan, investasi hilirisasi, dan manajemen lingkungan menjadi faktor utama dalam optimalisasi pemanfaatannya. Dengan pengelolaan yang tepat, daerah ini berpotensi menjadi pusat penyedia mineral strategis nasional yang memperkuat ketahanan energi dan kemandirian teknologi Indonesia.
Co-Authors Arifudin Idrus Asep Supriyadi Dwi Fitri Yudiantoro Lestari, Arfena Deah Meirany, Jasisca Mochammad Meddy Danial Prasetyawati Umar, Emi Sutarto Sutarto