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FACIES ANALYSIS, SEDIMENTOLOGY AND PALEOCURRENT OF THE QUATERNARY NENERING FORMATION, PENGKALAN HULU, MALAYSIA Ulfa, Yuniarti; Rong Yu, Evonne Hooi; Kit, Ooi Cheng
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 35, No 2 (2014): November 2014
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

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Nenering Formation is essentially made up of semi-consolidated sediments, which are divided into basal conglomerate beds, conglomeratic sandstone, cross-bedded sandstone, and siltstone to muddy layers facies. It is overlie unconformable to the Berapit Formation, but conformable to the Kroh and Grik Formations. The stratigraphy of Nenering Formation is a fining upwards sequence where the thickness of conglomerate beds become thinner upwards and become thicker for conglomeratic sandstone. The thickness varies from 0.5 m to tenths of meters. The more sandy in the upper portion (cross-bedded sandstone) overlie with thin siltstone and mudstone facies. The clast and grain composition suggested that the material making up the sedimentary sequence were derived predominantly from the erosion of granitoid rocks and sedimentary and metamorphic rocks constitute a minor provenance. Imbrications and the trend sizes of clasts indicate that the palaeo-current flow toward northeast. Cross bedding that was found in conglomerate and sandstone indicates the main channel depositional environment. The sequence stratigraphy of this area match with the Saskatchewan fluvial braided channel model. Keywords: conglomerate, facies, fluvial, paleocurrent, stratigraphy, sedimentology

Geology and Land Suitability Analysis for Final Processing Waste Site in Ambon Island Mailoa, Winardcova Vania Cerwyn; Kololu, Micky; Ulfa, Yuniarti; Puradimadja, Deni Juanda
EKSPLORIUM Vol 45, No 1 (2024): May 2024
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.7042

From 2017 to 2021, waste production in Ambon City increased from 200 tons/day to 297 tons/day, but the condition of the Toisapu landfill in Ambon did not support this. Toisapu landfill, which has been operating since 2007, is now in overload status and needs to be re-evaluated because it is on a slope of >20% and is located close to residential areas. This research aims to find an alternative replacement for the Toisapu landfill with the status of a Waste Processing and Final Processing Site that complies with Indonesian National Standards. This research uses an environmental geology approach based on Spatial Multi-Criteria Evaluation (SMCE), which combines geological and non-geological parameters. The analysis results for each parameter are overlaid, given a value, and then totaled to produce the most feasible land. The results of this research show that the most suitable land is in Wakal with an area of 126,668 ha. The permeability of this location is low, with the groundwater being quite deep (>80 meters), so there is little chance of leachate seepage contaminating the groundwater. In contrast to the Toisapu landfill, Wakal has a slope of <20%, far from protected forests and where residents live.

Identifikasi Kondisi Geologi dan Kualitas Airtanah di Desa Pelauw, Kecamatan Pulau Haruku, Kabupaten Maluku Tengah Kololu, Micky; Tuasikal, Hawa; Jati, Stevanus Nalendra; Puradimaja, Deny Juanda; Limehuwey, Resti; Ulfa, Yuniarti; Purwoarminta, Ananta
Journal of Science, Technology, and Visual Culture Vol. 4 No. 1 (2024): Juli 2024
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Pemenuhan kebutuhan air di Desa Pelauw sebagian besar bergantung pada air sungai dan airtanah. Namun ada sebagian masyarakat di Desa Pelauw kesulitan mendapatkan sumber air, sebab beberapa sumur gali memiliki sifat fisik payau. Oleh karena itu, penelitian ini bertujuan untuk mengidentifikasi kondisi geologi dan kualitas airtanah di Desa Pelauw, Kecamatan Pulau Haruku. Metode yang digunakan adalah interpretasi kondisi geologi, dan parameter fisik-kimia airtanah. Selanjutnya dilakukan klasifikasi nilai tiap parameter. Hasil penelitian menunjukkan bahwa Daerah penelitian di Desa Pelauw berada pada Satuan Endapan Aluvium (Qa), Batugamping Koral (Ql), dan Batuan Gunungapi Ambon (Tpav). Sistem hidrogeologi Desa Pelauw memiliki akuifer produktivitas sedang, akuifer produktivitas tinggi-sedang, dan akuifer produktif dengan pola aliran airtanah mengalir dari arah selatan ke utara dan intensitas curah hujan menengah. Kualitas air berdasarkan Permenkes No. 492 Tahun 2010 memiliki kondisi air tawar dengan nilai EC (138-1953 µs/cm), TDS (64-872 ppm), dan salinitas (0-2,84%), kondisi air payau dengan nilai EC (2072-2712 µs/cm), TDS (1.342-2.474 ppm), dan salinitas (4,04-5,42%), pH air layak minum dengan nilai 7,30-8,42 dan pH basa pada 8,63-8,56. Sampel airtanah pada pada daerah penelitian berasal dari adanya interaksi antara air dengan material penyusun akuifer.

Analisis Kesesuaian Lahan Kawasan Permukiman dan Pertanian Ubi Kayu Berdasarkan Aspek Geologi Lingkungan di Kecamatan Teluk Ambon Baguala Kololu, Micky; Jacob, Grace Christien Julian; Puradimaja, Deny Juanda; Limehuwey, Resti; Ulfa, Yuniarti; Jati, Stevanus Nalendra; Purwoarminta, Ananta
Journal of Science, Technology, and Visual Culture Vol. 4 No. 1 (2024): Juli 2024
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Luas lahan permukiman dan pertanian semakin mengecil seiring dengan laju pertumbuhan penduduk, namun ketersediaan lahan terbatas. Perencanaan yang baik diperlukan untuk menghindari alih fungsi lahan dan memaksimalkan potensi lahan. Kecamatan Teluk Ambon Baguala mengalami laju pertumbuhan penduduk sebesar 0,72% per tahun 2010 – 2020, memiliki perencanaan pengembangan kawasan permukiman dan pertanian ubi kayu, serta potensi sumber daya dan bencana geologi. Oleh karena itu, diperlukan analisis kesesuaian lahan untuk kawasan permukiman dan pertanian ubi kayu berdasarkan aspek geologi lingkungan pada daerah tersebut. Metode SMCE (Spatial Multi-Criteria Evaluation) digunakan untuk menganalisis kesesuaian lahan. Berdasarkan analisis SMCE, kawasan permukiman terdiri dari empat kelas kesesuaian lahan, yaitu sangat sesuai (8,6%), cukup sesuai (23,5%), sesuai marginal (23,9%), dan tidak sesuai (41,6%) dengan luas kelas lahan sesuai 1977,15 ha dan lahan tidak sesuai 1625,15 ha. Kawasan pertanian ubi kayu terdiri dari empat kelas kesesuaian lahan, yaitu sangat sesuai (7,3%), cukup sesuai (6,1%), sesuai marginal (25,3%), dan tidak sesuai (19,7%) dengan luas kelas lahan sesuai 827,51 ha dan lahan tidak sesuai 2774,79 ha. Berdasarkan analisis prioritas kawasan, maka luas kawasan permukiman 1894,53 ha dan kawasan pertanian ubi kayu 221,98 ha.

Combined Tide and Storm Influence on Facies Sedimentation of Miocene Miri Formation, Sarawak Ulfa, Yuniarti; Sapari, Nasiman; Harith, Zuhar Zahir Tuan
EKSPLORIUM Vol. 32 No. 2 (2011): NOVEMBER 2011
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2011.32.2.2814

This study was conducted on the sedimentary rocks belonging to the Miri Formation (Middle – Late Miocene). The primary objective of the present study is to provide additional interpretation on the stratigraphy of the Miri Formation in the Miri Field based on the new information gathered from new outcrops in the area. Five outcrops were examined in detail on sedimentology and stratigraphy. Based on lithology, sedimentary structures, bedding geometry and traces fossil, the sediments of the Miri Formation were grouped into fourteen lithofacies. Influence of tide and storm during the depositional processes of the formation were indicated by the group of two main facies associations which are: (i) tide-dominated estuary; and (ii) wave-and-storm dominated facies associations. The tide-dominated estuary system of the Miri Formation are includes variety of sub environments: estuary mouth or tidal channel and sand bars (characterized by trough cross-stratified sandstone with mud drapes facies), estuary channel or upper flow regime of sand flat (characterized by parallel stratified sandstone with mud-laminas facies), mixed-tidal flat (characterized by wavy and flaser bedded sandstone facies), and mud-tidal flat (characterized by rhythmic stratified sandstone-mudstone and lenticular bedding facies). The wave-and-storm dominated varied from lower to middle shoreface (characterized by hummocky cross-stratified sandstone and rhythmic parallel stratified sandstone and laminated siltstone facies), upper shoreface (characterized by swaley cross-stratified sandstone), lower shoreface (interbedded to bioturbated sandstone and siltstone facies), and offshore transitional (characterized by bioturbated sandstone and mudstone interbedding with parallel to hummocky cross-stratified sandstone facies).

Structural Characteristics of The Semanggol Formation Along The East-West Highway Route 67 Baling Area, Kedah, Malaysia Ulfa, Yuniarti; Hafizzy , Mohd Hafiz; Farhan, Muhammad
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2659

The amounts of structural data available from the East-West Highway Route 67 of Baling Area have been used to unravel the structural characteristics of the Semanggol Formation, which comprises black mudstone, sandstone, tuffaceous sandstone, tuff, paraconglomerate, siliceous shale and chert. The area was cut by two sets of faults trending NW-SE and NE-SW. The main fault in this area is known as Bok Bak fault that is trending NW-SE and have moderately to steeply dips (40o-88o) as compared to the conjugate faults. Two sets of folds trending NE-SW and NW-SE were also identified in this area, where most of them are symmetrical fold with gentle to open fold varies from non-plunging to nearly moderately plunging folds. Most of the faults have parallel orientation to the fold axis, indicated this pattern probably originated at the same period of deformation due to warping and uplifting.

Facies Analysis, Sedimentology and Paleocurrent of The Quaternary Nenering Formation, Pengkalan Hulu, Malaysia Ulfa, Yuniarti; Yu, Evonne Hooi Rong; Kit, Ooi Cheng
EKSPLORIUM Vol. 35 No. 2 (2014): NOVEMBER 2014
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2014.35.2.2755

Nenering Formation is essentially made up of semi-consolidated sediments, which are divided into basal conglomerate beds, conglomeratic sandstone, cross-bedded sandstone, and siltstone to muddy layers facies. It is overlie unconformable to the Berapit Formation, but conformable to the Kroh and Grik Formations. The stratigraphy of Nenering Formation is a fining upwards sequence where the thickness of conglomerate beds become thinner upwards and become thicker for conglomeratic sandstone. The thickness varies from 0.5 m to tenths of meters. The more sandy in the upper portion (cross-bedded sandstone) overlie with thin siltstone and mudstone facies. The clast and grain composition suggested that the material making up the sedimentary sequence were derived predominantly from the erosion of granitoid rocks and sedimentary and metamorphic rocks constitute a minor provenance. Imbrications and the trend sizes of clasts indicate that the palaeo-current flow toward northeast. Cross bedding that was found in conglomerate and sandstone indicates the main channel depositional environment. The sequence stratigraphy of this area match with the Saskatchewan fluvial braided channel model.

Hydrogeology and Groundwater Potential in The Sirimau District, Ambon City, Maluku Province Matrutty, Michelle Theodora; Kololu, Micky; Limehuwey, Resti; Purwoarminta, Ananta; Ulfa, Yuniarti; Jati, Stevandrus Nalendra; Puradimaja, Deny Juanda
EKSPLORIUM Vol. 45 No. 2 (2024): NOVEMBER 2024
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.7050

The demand for clean water in Sirimau District is the highest among all districts in Ambon City, with a total of 14.6 million liters per day for 146,453 people. Moreover, the demand for clean water is increasing with population growth. Therefore, research on hydrogeology and groundwater potential is necessary. The study aims to analyze the discharge and quality of groundwater. The methods used include field surveys, geoelectric measurements, and the analysis of physical and chemical water parameters. The geology of Sirimau district can be divided into five units: Kanikeh Formation, Ultramafic Rock, Ambon Volcanic Rock, Coral Limestone, and Alluvium. Unconfined aquifers are identified in three geological units: the Ambon Volcanic Rock, Alluvium and Coral Limestone, while confined aquifers are in the Ultramafic Rock and the Kanikeh Formation. The water facies are calcium magnesium bicarbonate and sodium-potassium chloride sulfate facies. The groundwater flow in Sirimau District has a northwest flow direction with an average hydraulic gradient of 0.0104. The groundwater discharge in the unconfined aquifer of the Ambon Volcanic Rock is 30 l/s, which is classified as a large discharge. The water quality from physical parameters does not exceed the maximum limit except for three sampling points. In contrast, the chemical content mostly does not exceed the maximum limit except at one drilled well location. Three springs develop due to fractures, while another occurs due to contact.

Geology and Land Suitability Analysis for Final Processing Waste Site in Ambon Island Mailoa, Winardcova Vania Cerwyn; Kololu, Micky; Ulfa, Yuniarti; Puradimadja, Deni Juanda
EKSPLORIUM Vol. 45 No. 1 (2024): MAY 2024
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.7042

The production of waste in Ambon City increased from 200 tons per day to 297 tons per day between 2017 and 2021, yet the state of the Toisapu landfill in Ambon did not keep up with this growth. The Toisapu landfill has been in operation since 2007, however, due to its proximity to residential areas and slope of more than 20 percent, it is currently in an overload state and requires a re-evaluation. The goal of this study is to identify a different landfill to replace the Toisapu landfill that fulfills the Indonesian National Standards and functions as a Waste Processing and Final Processing Site (TPPAS). This study combines an evaluation of the geological and non-geological parameters using an environmental geological technique called Spatial Multi-Criteria Evaluation (SMCE). In order to determine the most possible land, the study findings for each parameter are superimposed, assigned a value, and then added together. According to the research's findings, Wakal, which has 126,668 hectares of land is the best option. Since the groundwater in this area is quite deep (>80 meters) and has low permeability, there is minimal possibility of leachate seepage contaminating the groundwater. Wakal, unlike the Toisapu landfill, is located far from inhabited areas and protected forests, with a slope of less than 20%.

ANALISIS KESESUAIAN LAHAN UNTUK PERMUKIMAN DAN PARIWISATA BERDASARKAN ASPEK GEOLOGI LINGKUNGAN DENGAN METODE SPATIAL MULTI-CRITERIA EVALUATION (SMCE) DI DAERAH KECAMATAN NUSANIWE, KOTA AMBON Kololu, Micky; Ferdinandus, Giovanny; Limehuwey, Resti; Puradimaja, Deny Juanda; Ulfa, Yuniarti; Purwoarminta, Ananta; Jati, Stevanus Nalendra
Journal of Science, Technology, and Visual Culture Vol. 5 No. 2 (2025): Oktober 2025
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Lahan adalah sumber daya yang terbatas dan harus dimanfaatkan sesuai dengan daya dukung lingkungannya. Kecamatan Nusaniwe memiliki potensi sumber daya geologi dan rawan akan bencana geologi, sehingga diperlukan analisis kesesuaian lahan terutama untuk permukiman dan pariwisata. Beberapa hal yang menjadi alasan penelitian ini dilakukan antara lain; pembangunan permukiman pada Kecamatan ini belum merata, terdapat banyak lokasi pariwisata dan morfologinya di dominasi oleh lereng yang curam dan pesisir pantai. Penelitian ini menggunakan metode Spatial Multi-Criteria Evaluation (SMCE) untuk menganalisis kesesuaian lahan permukiman dan pariwisata. Dari hasil penelitian, menunjukkan bahwa lahan yang sesuai untuk dijadikan lokasi pembangunan permukiman, antara lain; 0.7 km² di Desa Amahusu, 1.25 km² di Negeri Nusaniwe, 1.5 km² di Desa Latuhalat, 0.07 km² di Kelurahan Waihaong, 2.04 km² di Negeri Urimessing, 0.2 km² di Kelurahan Mangga Dua, 0.1 km² di Kelurahan Urimessing, 0.45 km² di Kelurahan Kudamati, 0.41 km² di Negeri Seilale, 0.6 km² di Kelurahan Benteng, dan 0.32 km² di Kelurahan Nusaniwe. Sedangkan untuk pariwisata terdapat empat lokasi yang cukup sesuai dan memiliki nilai keragaman geologi (geodiversity) yaitu Bukit Paralayang, Pantai Pintu Kota, Pantai Tanjung Nusaniwe dan Pantai Batu Lubang. Keempat lokasi ini berpotensi untuk dilakukan pengembangan geopark pada kawasan wisata tersebut.

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