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All Journal Jurnal Teknik Sipil International Journal of Hydrological and Environmental for Sustainability Jurnal Indonesia Sosial Teknologi Asian Journal of Social and Humanities
Anjarwati, Retno
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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.
The Geological Structures Formed Influence the Process of Mineralization in the Beruang Kanan Area, Gunung Mas Regency, Central Kalimantan Anjarwati, Retno; Sutarto, Sutarto; Fitri Yudiantoro, Dwi; Idrus, Arifudin
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 11 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i11.8775

Abstract

The Schwaner Mountains stretch in the middle. Identification of geological structures that play a role in the formation of metallic mineral deposits is necessary for more efficient mining exploration and exploitation. The Right Bear is a mining site located on a remote hill in the central part of the island of Kalimantan. This study aims to determine the condition of geological structure and the influence of geological structure on the distribution of copper mineralization at the research site. In this study, surface data was collected in the form of lithological description data and data on the structure of bridles and veins in rocks. The equipment used is a geological compass, a geological hammer, GPS, a magnifier, and others. In general, the stratigraphy of the research area is divided into 3 rock units that can be seen on the geological map, in order from old to young, namely the lithology of the Sandstone Unit, the Dacitic Tuf Unit, the Andesite Unit, and the Quartz Sand Deposit Unit. The mineralization of the Right Bear area consists mainly of high Cu sulfide mineralization. It is related to copper mineralization. Associated mineralization is generally controlled by bridle and fault structures. Mineralization is hosted by volcanic and volcaniclastic rocks in the research area, especially in the middle and southeast of the research area. The geometry of a vein with a width of > 1 cm is called a vein, if it is < 1 cm wide it is called a vein and if it is < 1 mm it is called a vein cord. These veins generally have the direction NNE SSW, NE-SW, NW-SE and WNW-ESE.
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.
Co-Authors Arifudin Idrus Asep Supriyadi Dwi Fitri Yudiantoro Fitri Yudiantoro, Dwi Lestari, Arfena Deah Meirany, Jasisca Mochammad Meddy Danial Prasetyawati Umar, Emi Sutarto Sutarto