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Journal of Applied Geology

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Published by Universitas Gadjah Mada

ISSN : 25022822 EISSN : 25022822 DOI : https://doi.org/10.22146

Core Subject : Science, Social, Engineering,

Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

Journal of Applied Geology – JAG focuses on the applied geology and geosciences with its key objective particularly emphasis on application of basic geological knowledge for addressing environmental, engineering, and geo-hazards problems. The subject covers variety of topics including geodynamics, sedimentology and stratigraphy, volcanology, engineering geology, environmental geology, hydrogeology, geo-hazard and mitigation, mineral resources, energy resources, medical geology, geo-archaeology, as well as applied geophysics and geodesy.

Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi

Articles 6 Documents

Search results for , issue "Vol 5, No 2 (2020)" : 6 Documents clear

Phytoremediation of Heavy Metals Contaminated Soil in Artisanal Gold Mining at Selogiri, Wonogiri District, Central Java, Indonesia Bambang Suryo Madyo Pranoto; Wawan Budianta
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Artisanal gold mining (ASGM) is commonly found in Indonesia, particularly in Wonogiri District, Central Java. One of the impacts of ASGM activity is soil contamination influence by mining waste. The objective of this study to investigate the potential use of Amaranthus spinosus L. and Jatropha curcas for remediation of Pb and As in contaminated soil. Phytoremediation experiment was conducted by using Amaranthus spinosus L. and Jatropha curcas and evaluate the effectiveness of both plants as a hyperaccumulator. The result shows that the higher Pb and As concentration was found in roots rather than shoots in both plants, however, the use of Jatropha curcas seems more effective on reducing Pb and As concentrations more than Amaranthus spinosus L in both shoots and roots. Generally, the use of both hyperaccumulator plants was more effective in Pb remediation compared to As. This phytoremediation experiment revealed that the use of both hyperaccumulator plants reduces the concentrations of Pb and As in contaminated soil, which of the critical point leading to the entry of Pb and As into the food chain.

Hydrothermal Alteration of High Sulfidation Epithermal Deposits in Secang Area, Tulungagung, East Java, Indonesia Anastasia Dewi Titisari; Septyo Uji Pratomo; Arifudin Idrus
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

This research aims to determine geological condition and alteration in an epithermal high sulfidation mineralization as an initial guide for further exploration stages. Detailed geological mapping with scale of 1:12,500 is conducted to identify geological aspects and distribution of alteration zones. Selected rocks samples were prepared for laboratory analysis which are petrography, XRD (X-Ray Diffraction), and FA-AAS (Fire Assay-Atomic Absorption Spectrometry) analyse. Geological condition of the study area consists of six rock units including andesite lava, andesite breccia, diorite intrusion, polymict breccia, limestone, and alluvial deposit. Geological structures found are left strike-slip fault with right strike-slip fault as accompany. Result of XRD analysis shows the presence of clay minerals group: smectite, kaolinite, illite, diaspore, alunite, and pyrophillite. The alteration zones of study area are propylitic, argillic, advance argillic, and silisification zones. The further exploration stage is recommended to focus at the southwest and northeast of study area.

Updated Segmentation Model of the Aceh Segment of the Great Sumatran Fault System in Northern Sumatra, Indonesia Aulia Kurnia Hady; Gayatri Indah Marliyani
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

We study the Aceh Fault segment, the northernmost segment of the Great Sumatran Fault in western Indonesia. The Aceh Fault segment spans 250 km long, passing through three districts: West Aceh, Pidie Jaya, and Aceh Besar, a region of ~546,143 population. The current segmentation model assumes that the Aceh Fault segment acts as a single fault segment, which would generate closer to an M8 earthquake. This estimation is inconsistent with the ~M6–7 historical earthquake data. We conduct a detailed active fault mapping using an ~8 m resolution digital elevation model (DEM) of DEMNAS and sub-m DEM data from UAV-based photogrammetry to resolve this fault’s segmentation model. Our study indicates that the Aceh Fault is active and that the fault segment can be further divided into seven sub-segments: Beutong, Kuala Tripa, Geumpang, Mane, Jantho, Indrapuri, and Pulo Aceh. The fault kinematics identified in the field is consistent with right-lateral faulting. Our study’s findings provide new information to understand the fault geometry and estimate potential earthquakes’ maximum magnitude along the Aceh Fault segment. These are important for the development of seismic hazard analysis of the area.

Simulation of Kalirejo Road Side Slope based on Altered Andesite Characters, Kulon Progo Regency, Indonesia Hnin Thandar Phyu; Heru Hendrayana; I Gde Budi Indrawan; Toshitaka Kamai
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

ABSTRACT. This study is performed to investigate the characteristics of intrusive andesite rock consisting of Kalirejo Road Side Slope located in Kulon Progo Mountains. The rocks consisting the slope are identified by visual observation of hand specimens in the field, petrographic and X-ray Diffraction (XRD) analyses of the rock samples in the laboratory, upon which genetic rock classification is determined. The altered rock types are determined by the presence of specific minerals identified in the petrographic and XRD analyses. The alteration intensity is examined by comparing the amount of secondary minerals to the primary minerals observed in the petrographic and XRD analyses. The developments of rock weathering are determined in the field GSI classification based on the visual characteristics and in the laboratory-based on the Chemical Index of Alteration (CIA) and engineering properties of the altered rocks. The results show that the rocks typically consisted of 33.2 to 59.2% plagioclase, 1.4 to 5.1% quartz, therefore, are classified as andesite. The presence of halloysite, montmorillonite, and kaolinite as secondary minerals in the altered andesite indicated that the parent andesite rocks have undergone argillic alteration. Meanwhile, the percentages of primary minerals to secondary minerals indicate that the andesite rocks have undergone moderate to high alteration intensity. Based on the visual characteristics, the research area consisted of fresh, slight weathered andesite rocks and complete weathered residual soil. The CIA values of the samples are increased with the increase in rock weathering. Identification of visual characteristics of rock weathering appeared to be in good agreement with those classified based on the CIA and engineering properties analysis results. The uniaxial compressive strength (UCS) of rocks and soils is determined by point load tests. Engineering properties of the residual soils are performed by using ASTM standard procedures. In the lower part of the roadside, slope consists of fresh and slightly weathered andesite rocks, which have relatively high strength and are classified as medium strong rocks. Meanwhile, the upper part of the slope profile contained completely weathered residual soil, which had very low compressive strength, are classified as very weak soil.Keywords: andesite, argillic alteration, Geological Strength Index (GSI), hydrothermal alteration, roadside slope, weathering

Estimating of Maximum Groundwater Level to Trigger Landslide in Batu Hijau Open Pit Mine, West Nusa Tenggara, Indonesia Amirul Aiman Abd Karim; Wahyu Wilopo; I Gde Budi Indrawan; Yan Adriansyah
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The safety of the employees is essential in the mining activity area. Thus, the sloping wall of the pit needs to evaluate from time to time to avoid any loss due to landslide. One of the essential parameters to lead to slope failure is groundwater. Therefore, this paper highlights the limitations of the groundwater for the existing slope mine by analyzing it for several groundwater levels until it reached a safety factor below 1.2. The analysis was done using a finite element method for slope stability and finite element analysis for groundwater seepage for groundwater modeling. The results show that the safety factor of the slope showing a linearly decreasing trend and safety factor reached below 1.2 when 70 m increment in groundwater level from the original groundwater level model.

Petrography and Geochemistry of Metasedimentary Rocks from the Taku Schist in Kelantan, North-East Peninsular Malaysia. Muhammad Irman Khalif bin Ahmad Aminuddin; Nugroho Imam Setiawan; I Wayan Warmada; Kamar Shah Ariffin; Kotaro Yonezu
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The Taku Schist, which is located in the north-east Peninsular Malaysia, is characterized by its North-South oriented elongated body. It forms part of the Indonesian orogenic build-up that was generated via the convergence of the Sibumasu continental unit and Sukhothai Arc. Subsequent petrography analyses of the metasedimentary rocks sourced from the Taku Schist revealed that their formation was attributable to the metamorphism of greenschist into amphibolite facies, which could be observed near the Triassic and Cretaceous intrusions of the Kemahang Granite. The evolutionary process of the rocks could be linked with the interactions occurring between contact and regional metamorphisms. The resulting chemical classification upon their assessment disclosed that the metasedimentary rocks of Taku Schist were made up of greywacke and shale, grouped into the quartzose sedimentary provenance, and belonged to the Continental Island Arc (CIA). This information is required for the tectonic setting discrimination purpose. It is a reflection of the episodic contractions underwent by the Taku Schist, wherein they would lead to the Sibumasu sedimentary cover along with both an accretionary wedge and the genetically-correlated Bentong-Raub melange to different greenschist. Otherwise associated with amphibolite facies, the conditions and depths of the facies were determined according to their position in relation to the upper plate of the Sukhothai Arc.

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Geological Engineering Departement Universitas Gadjah Mada Jl. Grafika No. 2 Kampus UGM Yogyakarta 55281 Phone +62-274-513668 Fax +62-274-546039

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Daerah istimewa yogyakarta

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email jag.ft@ugm.ac.id

Phone +62274-513668

Journal Mail Official jag.ft@ugm.ac.id

Editorial Address Geological Engineering Departement Universitas Gadjah Mada Jl. Grafika No. 2 Kampus UGM Yogyakarta 55281 Phone +62-274-513668 Fax +62-274-546039

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
jag.ft@ugm.ac.id

Phone
+62274-513668

Journal Mail Official
jag.ft@ugm.ac.id

Editorial Address
Geological Engineering Departement Universitas Gadjah Mada Jl. Grafika No. 2 Kampus UGM Yogyakarta 55281 Phone +62-274-513668 Fax +62-274-546039

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA