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All Journal KURVATEK Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Qoyyibi, Dava Saliham
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Fasies dan Lingkungan Pengendapan Formasi Nanggulan di Sungai Kamal, Desa Pendoworejo, Kecamatan Girimulyo, Kabupaten Kulon Progo, Provinsi Daerah Istimewa Yogyakarta Qoyyibi, Dava Saliham; Rizqi, Al Hussein Flowers
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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So far, stratigraphic measurements on the Nanggulan Formation in the Nanggulan area have been limited to the Kalisonggo River location. There are also sedimentary rock outcrops with relatively steep slopes in the Kamal River. This location has been used as a study area to obtain a sized stratigraphic picture so that it can be studied as a basis for determining facies and environmental studies. deposition. The purpose of this research is to obtain measured stratigraphic data (measurement section) and aims to obtain relative ages and depositional environments. Administratively, the research area was carried out on the Kamal River, Pendoworejo Village, Girimulyo District, Kulon Progo Regency, Yogyakarta Special Region Province. Based on the research results, five (5) units in the stratigraphic data were measured using a sampling research method based on Jacob Stick stratigraphic measurements, including sandstone units, marl units, black mudstone units, siltstone units, and old andesite formation breccia units, prepared by reacting the samples using H2O2 solution, sample observation using a microscope, and determination based on data obtained using existing classifications. Based on plangtonic foraminifera analysis, the research location is aged N9-N11 (Middle Miocene). The depositional environment in the research area uses benthonic foraminifera identification which is then correlated to obtain a Middle Neritic depositional environment.
PENENTUAN FASIES DAN ARUS PURBA BERDASARKAN KETERDAPATAN STRUKTUR SEDIMEN DAN LITOLOGI PADA KECAMATAN NGLIPAR, KABUPATEN GUNUNG KIDUL, YOGYAKARTA rizqi, al hussein flowers; Thabita Monica Tupang, Kannaya; Qoyyibi, Dava Saliham; Gil Lodar, Jaden
Retii 2025: Prosiding Seminar Nasional ReTII ke-20 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Kajian mengenai arah arus purba pada Formasi Oyo cukup terbatas, struktur sedimen dalam penentuan arah arus purba dapat ditemukan pada daerah Kali Oyo, Kecamatan Nglipar, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta yang menjadi daerah penelitian. Pada daerah pengkajian ini dijumpai singkapan batuan dengan total ketebalan hasil stratigrafi terukur sebesar 10,7 meter, yang dinilai cukup representatif untuk dilakukan analisis terhadap arah arus purba. Tujuan dilakukan penelitian ini adalah menyusun hasil kajian dengan mendapatkan data struktur sedimen serta variasi litologi pada jalur pengukuran stratigrafi terukur. Berdasarkan hasil pengamatan di lapangan didapati litologi penyusun berupa batugamping kalsilutit, batugamping kalkarenit, serta batugamping kalsirudit sedangkan untuk struktur sedimen penentu arah arus purba yang ditemukan pada daerah ini berupa slump dan cross-bedding. Berdasarkan data yang diperoleh, dilakukan analisis fasies dan arah arus purba, daerah ini diinterpretasikan masuk pada fasies foreslope serta winnowed edge sand dan didapati pola arah arus purba yaitu bipolar dan polymodal. Kata kunci: Formasi Oyo, Arus Purba, Fasies, Gunung Kidul
POTENSI NIKEL LATERIT PADA PROSPEK PUU NUNU, KECAMATAN KABAENA SELATAN, KABUPATEN BOMBANA, PROVINSI SULAWESI TENGGARA Qoyyibi, Dava Saliham; Sugarbo, Oky; Hartono, Hill Gendoet
KURVATEK Vol 11 No 1 (2026): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v11i1.5807

Abstract

Nickel occurrences in Indonesia are generally found as lateritic nickel deposits derived from the residual weathering of bedrock from ophiolite or ultramafic complexes. Sulawesi Island and the surrounding smaller islands possess significant nickel potential due to their complex geological setting. Therefore, a geological study is necessary to assess this potential by conducting surface mapping. The study area is located in Southeast Sulawesi and falls within the mining business license (IUP) area of PT. Tambang Bumi Sulawesi. This research aims to carry out surface geological mapping, with the objective of identifying geological conditions, including geomorphology, stratigraphy, geological structures, and resource estimation in areas with lateritic nickel potential. The results of the study indicate that the geomorphological units consist of strongly undulating-denudational hills and weakly to strongly undulating-denudational areas. The stratigraphy of the study area, from oldest to youngest, comprises lherzolite and hornblende pyroxenite of the Ultramafic Complex, which are unconformably overlain by mica schist and marble of the Pompangeo Complex. The geological structure is characterized by a sinistral (left-lateral) left slip fault trending northwest-southeast. Resource estimation using the ordinary kriging method yielded a total measured resource volume of 518,855 m³, with an estimated tonnage of 778,283 tons in the lateritic potential area.
Co-Authors Al Hussein Flowers Rizqi Gil Lodar, Jaden Hill Gendoet Hartono Oky Sugarbo Thabita Monica Tupang, Kannaya