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ANALISIS PENGARUH TIPE BOULDER TERHADAP RECOVERY SCREENING STATION PRODUCT PT. VALE INDONESIA TBK SOROAK Sabang, St. Hastuti; Maulana, Adi; Irvan, Ulva Ria
Jurnal Penelitian Geosains Vol 11, No 1 (2015)
Publisher : Jurnal Penelitian Geosains

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Rock size distribution is plays an important role in mining unserpentinized peridotite of Sorowako laterite nickel deposite. The increasing of Rock size will reduce mine recovery and make mining operation become more expensive. To outlining the Rock size distribution, a model generated from RQD have been used to classified rock size distribution into 4 unit is WT 1, WT 2, WT 3, and Infracture. The purpose of this study is provide an integrated and detailed information about the actual size of boulder in West Block and distribution of rock boulder. Research areas are in the concession area of West Block of PT. Vale is Hill X, Hill Y, and Hill Z. The research methods used by based on the method of RQD and data processing base on the drill point. Megascopic observations of rock types in the study area is igneus rock peridotite with composition of mineral dominantly by piroksin, olivine, serpentin and opaq. From the results of the data analysis and identifier of each element laterite zona through surface geological mapping Laterite zone of research area can be divided top soil, limonite zone, saprolite zone and bedrock.Keywords: West block of PT. Vale, Laterite nickel, Unserpentinized peridotite, Rock type.

STUDI PROVENANCE BATUPASIR FORMASI WALANAE DAERAH LALEBATA KECAMATAN LAMURU KABUPATEN BONE PROVINSI SULAWESI SELATAN Ardiansyah, Muhammad; Farida, Mutia; Irvan, Ulva Ria
Jurnal Penelitian Geosains Vol 11, No 1 (2015)
Publisher : Jurnal Penelitian Geosains

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Almost of Walanae Formation consist of siliciclastic rocks. Provenance study is needed to determinate the source rocks because these rocks formed from earlier rocks. Administratively, the study area is located in Lalebata area, Lamuru District, Bone Regency, South Sulawesi Province.The purpose of this research is to study the provenance of Walanae Formation sandstone. The method were used measuring section and petrography analysis that used in genetic and empiric classification. Based on thin section analysis by compare between the monoquarst and polyquarst. The sandstone provenance of the area are plutonic igneous rocks, volcanic rocks and metamorphic rocks. The result of this study indicate that provenance of the Walanae sandstone derived from arround Formations are Igneous rocks and metamorphic rocks and included as Recycled Orogen and Mamatic Arc Provenance type.Keywords: Walanae Formation, Provenance, monoquarst, polyquarst, Recycled Orogen, Magmatic Arc Provenance

Determination of heavy metal elements concentration in soils and tailing sediments from lateritic nickel post-mining areas in Motui District, Southeast Sulawesi Muhardi Mustafa; Adi Maulana; Ulva Ria Irfan; Adi Tonggiroh
Journal of Degraded and Mining Lands Management Vol 9, No 2 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.092.3273

Heavy metal elements concentration study has been determined from soils and tailing sediments in laterite nickel post-mining area in Motui District Southeast Sulawesi. This study aimed to determine the concentration of some heavy metal elements, especially Fe, Co, Mn and Cr, from surface soils sediments in waste dump sites and tailing sediments in settling ponds from lateritic nickel post-mining areas. A total of 20 samples consisting of 18 soil samples and 2 tailing sediments samples were systematically collected for the study. The soil samples from the waste dump site profile were collected from 3 layers which were divided based on the colour of the soils from top to bottom, namely Layer C, Layer D and Layer E. Six soil samples were taken from each layer with space between each sample in one layer was about 50 – 60 cm. The samples were sent to the laboratory and analysed using Atomic Absorption Spectrometer (AAS) method to determine the concentration of heavy elements. Metal-bearing minerals detected from the bedrock consists of chromite, manganese, magnetite and limonite which are responsible for the Cr, Mn and Co, and Fe content, respectively. The result showed that Fe content is significantly higher in soil samples from Layer C and tailing sediments with dark red to brown in colour, suggesting the strong relation between Fe content and colour index. The general element mobility trend showed that Mn and Co are positively correlated in soil sampling from all layers and tailing samples, whereas Fe and Cr show a negative correlation trend in Layer C, D and tailing sediments but positively correlated in Layer E.

ANALISIS PENGARUH TIPE BOULDER TERHADAP RECOVERY SCREENING STATION PRODUCT PT. VALE INDONESIA TBK SOROAK St. Hastuti Sabang; Adi Maulana; Ulva Ria Irvan
Jurnal Penelitian Geosains Vol. 11 No. 1 (2015)
Publisher : Jurnal Penelitian Geosains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Rock size distribution is plays an important role in mining unserpentinized peridotite of Sorowako laterite nickel deposite. The increasing of Rock size will reduce mine recovery and make mining operation become more expensive. To outlining the Rock size distribution, a model generated from RQD have been used to classified rock size distribution into 4 unit is WT 1, WT 2, WT 3, and Infracture. The purpose of this study is provide an integrated and detailed information about the actual size of boulder in West Block and distribution of rock boulder. Research areas are in the concession area of West Block of PT. Vale is Hill X, Hill Y, and Hill Z. The research methods used by based on the method of RQD and data processing base on the drill point. Megascopic observations of rock types in the study area is igneus rock peridotite with composition of mineral dominantly by piroksin, olivine, serpentin and opaq. From the results of the data analysis and identifier of each element laterite zona through surface geological mapping Laterite zone of research area can be divided top soil, limonite zone, saprolite zone and bedrock.Keywords: West block of PT. Vale, Laterite nickel, Unserpentinized peridotite, Rock type.

STUDI PROVENANCE BATUPASIR FORMASI WALANAE DAERAH LALEBATA KECAMATAN LAMURU KABUPATEN BONE PROVINSI SULAWESI SELATAN Muhammad Ardiansyah; Mutia Farida; Ulva Ria Irvan
Jurnal Penelitian Geosains Vol. 11 No. 1 (2015)
Publisher : Jurnal Penelitian Geosains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Almost of Walanae Formation consist of siliciclastic rocks. Provenance study is needed to determinate the source rocks because these rocks formed from earlier rocks. Administratively, the study area is located in Lalebata area, Lamuru District, Bone Regency, South Sulawesi Province.The purpose of this research is to study the provenance of Walanae Formation sandstone. The method were used measuring section and petrography analysis that used in genetic and empiric classification. Based on thin section analysis by compare between the monoquarst and polyquarst. The sandstone provenance of the area are plutonic igneous rocks, volcanic rocks and metamorphic rocks. The result of this study indicate that provenance of the Walanae sandstone derived from arround Formations are Igneous rocks and metamorphic rocks and included as Recycled Orogen and Mamatic Arc Provenance type.Keywords: Walanae Formation, Provenance, monoquarst, polyquarst, Recycled Orogen, Magmatic Arc Provenance

Sosialisasi Bencana Geologi dan Mitigasinya di Sekolah Dasar Islam Terpadu (SDIT) Ar-Rahmah Makassar Meutia Farida; Ilham Alimuddin; Adi Maulana; Ulva Ria Irfan; Asri Jaya; Sultan -; Kaharuddin -; Agustinus -
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 2 No 2 (2019): Aplikasi Teknologi untuk Hidup Masyarakat yang Lebih Baik
Publisher : Faculty of Engineering UNHAS

Disaster-prone conditions in Indonesia cause a large number of impacts experienced such as casualties, damage to infrastructure and other vital facilities. With this impact, people's knowledge and understanding of geological natural disasters and mitigation efforts need to be educated early on. Mitigation is a series of activities carried out to reduce disaster risk and is included in the initial stages of natural disaster management. Of course the activity of providing geological disaster information and its mitigation is one of our responsibilities as geologists in academia to provide knowledge and understanding to the community, and one of the targets is early childhood or elementary school students. The output of this activity is to increase the capacity of the community, especially elementary school students, to understand early on the importance of disaster mitigation in efforts to reduce or minimize losses due to geological disasters. This activity was carried out by lecturing and simulation methods of a number of geological disaster events, the introduction of prepared disaster bags including the introduction of K3 (Occupational, Safety and Health).

Implementasi Student Centered Learning (SCL) Materi Olimpiade Sains Nasional (OSN) Kebumian Di SMA Negeri 8 Gowa, Sulawesi Selatan Ulva Ria Irvan; Ilham Alimuddin; Meutia Farida; Adi Maulana; Asri Jaya; Haerany Sirajuddin; Adi Tonggiroh; Busthan Azikin; Sahabuddin -
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 2 No 2 (2019): Aplikasi Teknologi untuk Hidup Masyarakat yang Lebih Baik
Publisher : Faculty of Engineering UNHAS

The development of scientific subjects in geography at the secondary school level has an impact on knowledge about geology, including rocks and their formation processes, the origin of the earth, to how to plan urban planning in a geographic information system. Geography books generally refer to the international earth science curriculum, making it very difficult for high school students to understand it. The main problem revealed by teachers and students who are interested in OSN in the field of earth is that the material being contested is quite complex. The basic problems of geology, spatial planning and disaster become national and even global issues. Through the Community Service Program activities, the Faculty of Engineering in this case is represented by a team of lecturers from the Geological Engineering Study Program offering Student Centered Learning methods to facilitate understanding of the National Science Olympiad material in the field of Earth Sciences. Besides that, it can also motivate and competitiveness to take part in competitions, especially for students of SMA Negeri 8 Gowa. The purpose of community service activities is to: a) Provide basic geological knowledge as part of earth science; b) Providing knowledge of Indonesian geology; c) Provide material tested in the national earth science olympiad; d) Provide the practice of identifying minerals and rocks, geological structures, fossils, and topographic map readings.

ANALYSIS OF HEAVY METAL GEOCHEMISTRY BEHAVIOR ON SOIL IN THE RIVER OF LAKE MATANO AREA, SOUTH SULAWESI Adnan Iswandi; Ulva Ria Irfan; Ilham Alimuddin
ASTONJADRO Vol. 11 No. 2 (2022): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v11i2.6573

Geologically, the Lake Matano area is an area of laterite deposits, where in these deposits there are heavy metal geochemical elements that can have a negative impact on the environment. This research was conducted in three rivers that surround the area and empties into Lake Matano, with the aim of analyzing the geochemical behavior of heavy metals in soil. The method used includes a literature study and observing the results of previous studies and testing the content of heavy metals with the AAS tool. The results showed the behavior of heavy metals in the soil around Lake Matano in the three rivers where metals that exceeded the critical number were Fe, Mn, Cu, Co, Ni. and which is still below the critical number limit is Cr metal. The presence of heavy metals in the soil at the research site is caused by the results of the disposal of waste from mining activities and anthropogenic activities where the end of the disposal goes directly to the ground so that the heavy metals contained in the disposal will enter the soil and experience contamination in nature so that the existing organic compounds have undergone degradation.

Evaluasi Kesuburan Tanah Pada Lahan Pasca Tambang Nikel Laterit Sulawesi Tenggara Muhardi Mustafa; Adi Maulana; Ulva Ria Irfan; Adi Tonggiroh
Jurnal Ilmu Alam dan Lingkungan Vol. 13 No. 1 (2022): Jurnal Ilmu Alam dan Lingkungan
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jal.v13i1.20457

Pasca penambangan terbuka nikel laterit menyisakan lahan topografi rendah yang kemudian direklamasi dengan cara mengembalikan tanah bagian atas (top soil) sebagai timbunan. Penimbunan ini tidak selamanya berjalan dengan baik bahkan menghasilkan lahan tidak produktif. Dikarenakan pada lahan pasca tambang peran tanah timbunan memerlukan adaptasi fisika kimia terhadap tanah sisa penambangan. Pada lokasi penelitian terdapat sebagian lahan bertekstur lempung berdebu dan vegetasi tak dapat tumbuh dengan baik. Penelitian ini membahas salah satu lahan reklamasi yang masuk sebagai lahan tidak produktif yang bertujuan memberikan informasi karakteristik tanahnya. Hasil penelitian menunjukkan tanah lahan pasca tambang minim akan unsur hara dengan status nilai pH rendah, C-Organik rendah, Nitrogen total rendah, fosfor tersedia rendah, kapasitas tukar ion serta kejenuhan basa mengindikasikan status kesuburan tanah sangat rendah. Hal ini didukung oleh analisis tekstur tanah lempung berdebu lebih dominan daripada fraksi tanah lempung berliat yang berkorelasi dengan porositas dan permiabilitas jelek.

Analysis of Grain Morphology, Mineral Composition, and Ore Grade on Gold Placer Deposits in Bantimurung, Pangkep Regency, South Sulawesi, Indonesia Ulva Ria Irfan; Angga Alamin Husain; Irzal Nur
Journal of Geoscience, Engineering, Environment, and Technology Vol. 7 No. 2 (2022): JGEET Vol 07 No 02 : June (2022)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2022.7.2.9164

The information through social media shows that there is quite an intense placer mining activity by local residents in the Bantimurung area, Tondong Tallasa District, Pangkep Regency. This study as a preliminary research aims to determine the grain morphology characteristics of mineral composition and metal grade in gold placer deposits in the study area. The data collected were eight samples. The collected samples were prepared into thin section, polished and observed using a microscope to identify the mineral composition and grain morphology. The grades of Au metal and its associated metals consisting of Ag, Zn, Pb, and Cu in the placer samples were analyzed by the AAS method. Petrography shows abundant of quartz, plagioclase, biotite and pyroxene minerals it might be indication of mineralization of epithermal. Ore petrography shows pyrite present along the river, silver is also found quite a lot along the river. Meanwhile, covellite, magnetite, sphalerite, and garnet were found only slightly at the sampling station this mineral composition indicates that the source of the placer deposits was epithermal. The grain morphology of the thin-section observation shows that quartz dominant has a high sphericity with character of roundness tends to be very angular to sub-rounded from upstream to downstream of the river. Plagioclase tends to have sub rounded roundness and high sphericity. Biotite tends to have a high sphericity with roundness from upstream to downstream is very angular, then angular, then sub-rounded. Pyroxenes tend to have high sphericity with very angular and angular roundness. Au content is directly proportional to Cu and inversely proportional to Zn, Pb, and Ag. Statistically Au affects the content of Cu by 50.97%. It can be concluded that Au is genetically associated with Cu, however Au grains that were still attached to the mineral and had not been separated from other minerals so that it could not be seen visually. This can also indicate that the source of this placer deposit is not far from the study site. Au grade corelated with stream sediment types it is 97,86 ppm for channel bar and 94,16 ppm for point bar, based on this we conclude the downstream has higher grade of Au compare to the upstream.

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