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All Journal IJOG : Indonesian Journal on Geoscience BULLETIN OF THE MARINE GEOLOGY JURNAL PENDIDIKAN TAMBUSAI Journal of Community Based Environmental Engineering and Management INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Journal of Geoscience Engineering and Energy (JOGEE) JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Jurnal Eksakta Kebumian
Jambak, Moehammad Ali
Universitas Trisakti
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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KARAKTERISTIK BATUGAMPING FORMASI WONOSARI DI DAERAH BUNDER DAN SEKITARNYA, WONOSARI,GUNUNGKIDUL D.I.Y : THE CHARACTERISTICS OF THE WONOSARI FORMATION LIMESTONE IN THE BUNDER AREA AND ITS SURROUNDINGS, WONOSARI, GUNUNGKIDUL, D.I.Y Surya Darma Hafiz; Moehammad Ali Jambak; Budi Wijaya; Mira Meirawaty; Cahyaningratri Prima Ryandhani; Wildan Tri Koesmawardani; Suherman Dwi Nuryana; Oliver Enrico Zefanya
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 4, NOMOR 2, AGUSTUS 2023
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v4i2.17301

Abstract

Studi ini bertujuan untuk mengkaji karakteristik  batugamping Formasi Wonosari di Desa Bunder, Kecamatan Ponjong, Kabupaten Gunungkidul, DIY. Analisis litologi mengungkapkan bahwa batuan wackstone berwarna coklat dengan tekstur bioklastik, terdiri dari sekitar 75% lumpur karbonat/mikrit dan 25% fragmen butiran. Kehadiran fosil meliputi foraminifera planktonik dan bentos, dengan fragmen bioklas yang utuh mengalami proses mikritisasi dan neomorfisme menjadi kalsit spar yang jernih. Pengamatan lapangan menunjukkan adanya singkapan batuan yang segar maupun lapuk, dengan jurus lapisan berkisar antara N100° E hingga 105° E dan kemiringan rata-rata sekitar 4° - 8°. Ketebalan perkiraan formasi ini adalah sekitar 150-200 m. Berdasarkan analisis mikropaleontologi, spesies foraminifera planktonik dominan seperti Orbulina universa dan Sphaerodinella subdehiscens mengindikasikan rentang umur antara N10-N18. Satuan ini menunjukkan adanya struktur sedimen berlapis baik dan struktur masif gelegar, menandakan pengendapan di lingkungan yang tenang dengan energi rendah. Penelitian ini memberikan pemahaman lebih baik tentang litologi, lingkungan pengendapan, dan perkiraan umur Formasi Wonosari di wilayah penelitian. This study focuses on the characteristic of the Wonosari Formation carbonate rocks in Bunder Village, Ponjong Sub-district, Gunungkidul Regency, DIY. The lithological analysis reveals brown-colored wackstone with a bioclastic texture, consisting of 75% mud-supported carbonate/micrite and 25% grain fragments. The fossil assemblage includes planktonic and benthic foraminifera, with intact bioclastic fragments exhibiting signs of micritization and subsequent neomorphism into clear calcite spar. Field observations indicate fresh and weathered outcrops with a bedding strike ranging from N100° E to 105° E and an average dip angle of 4° - 8°. The estimated thickness of the formation is around 150-200 m. Based on micropaleontological analysis, dominant planktonic foraminifera species such as Orbulina universa and Sphaerodinella subdehiscens suggest an age range of N10-N18. The unit displays well-layered sedimentary structures and occasional massive structures, indicating deposition in a low-energy, relatively calm environment. This research contributes to a better understanding of the lithology, depositional environment, and age estimation of the Wonosari Formation in the study area..
Geochemical Characterization of Coal, Carbonaceous Shale, and Marine Shale As Source Rock in West Sulawesi, Indonesia Yarra Sutadiwiria; Muhammad Burhannudinnur; Moehammad Ali Jambak; Cahyaningratri Prima Riyandhani; Yeftamikha Yeftamikha
Indonesian Journal on Geoscience Vol. 9 No. 3 (2022)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.9.3.303-314

Abstract

DOI:10.17014/ijog.9.3.303-314The eastern part of the Makassar Strait has not achieved significant success in the petroleum exploration stage. In general, exploration wells in this area have not found hydrocarbons to date. Most of the problems experienced by these wells are geochemical-related, including the absence of a source rock where the hydrocarbon is formed, immature source rock, and low volume of hydrocarbon. Therefore, this study aims to find potential Eocene source rock in West Sulawesi. It commenced by determining the paleofacies followed by the geochemical analysis of well cutting and surface samples. The geochemical analyses conducted are total organic carbon (TOC), rock eval pyrolysis (REP), kerogen type, vitrinite reflectance (VR), and gas chromatography/mass spectrometry (GC/MS). The samples that have a potential as an Eocene source rock were coal, as well as carbonaceous and marine shale. Based on the plotting of relative abundance for sterane (C27 - C29), the coal and carbonaceous shale had the input from terrestrial organic material with a contribution from marine, while marine shale had the input from marine organic material and contribution from terrestrial. Furthermore, coal and carbonaceous shale had a relatively high proportion of C29 sterane compared to C27 and C28, while marine shale had a relatively high proportion of C27 compared to C28 and C29. The higher plants also contributed to the organic matter in carbonaceous shale and coal samples, as indicated by the abundance of oleanane/C 30 hopane and the other significant content of resin biomarker. In accordance with the objectives of the study, it was found that during the Eocene, the type of source rock in the eastern side of the province varied, starting with coal and carbonaceous shale in the upper intertidal-fluviodeltaic environment, and marine shale sediments from the source facies of marine algal.
ANALISIS FAKTOR KEAMANAN GEOMETRI LERENG DISPOSAL TAMBANG TERBUKA BATUBARA PT.PETROSEA, KALIMANTAN TIMUR: ANALYSIS OF SAFETY FACTORS FROM GEOMETRY DISPOSAL OPEN PIT COAL MINING PT. PETROSEA, EAST KALIMANTAN Saragih, Christmas Age Putra; Adhitama, Ramadhan; Barus, Rico; Jambak, Moehammad Ali
Journal of Geoscience Engineering and Energy VOLUME 4, NOMOR 1, FEBRUARI 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v4i1.14411

Abstract

Lereng yang tidak stabil menjadi masalah dalam proses pertambangan batubara maupun mineral di ruang terbuka. . Salah satu perusahaan pertambangan yang berlokasi di daerah Kabupaten Paser, Kalimantan Timur yaitu PT. Petrosea. Dimana pada daerah penelitian memiliki beberapa lereng yang sudah ditimbun dan perlu dilakukan evaluasi factor keamanannya agar aktivitas pertambangan selalu berjalan tanpa gangguan. Metode yang digunakan dalam mengevaluasi kestabilan lereng pada penelitian adalah Limit Equilibrium Methode dimana menggunakan uji triaxial material pada timbunan. Pada daerah penelitian didapati timbunan disposal yang memiliki factor keamanan >1,25.
KARAKTERISTIK BATUGAMPING FORMASI WONOSARI DI DAERAH BUNDER DAN SEKITARNYA, WONOSARI,GUNUNGKIDUL D.I.Y : THE CHARACTERISTICS OF THE WONOSARI FORMATION LIMESTONE IN THE BUNDER AREA AND ITS SURROUNDINGS, WONOSARI, GUNUNGKIDUL, D.I.Y Hafiz, Surya Darma; Moehammad Ali Jambak; Budi Wijaya; Mira Meirawaty; Cahyaningratri Prima Ryandhani; Wildan Tri Koesmawardani; Nuryana, Suherman Dwi; Zefanya, Oliver Enrico
Journal of Geoscience Engineering and Energy VOLUME 4, NOMOR 2, AGUSTUS 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v4i2.17301

Abstract

Studi ini bertujuan untuk mengkaji karakteristik  batugamping Formasi Wonosari di Desa Bunder, Kecamatan Ponjong, Kabupaten Gunungkidul, DIY. Analisis litologi mengungkapkan bahwa batuan wackstone berwarna coklat dengan tekstur bioklastik, terdiri dari sekitar 75% lumpur karbonat/mikrit dan 25% fragmen butiran. Kehadiran fosil meliputi foraminifera planktonik dan bentos, dengan fragmen bioklas yang utuh mengalami proses mikritisasi dan neomorfisme menjadi kalsit spar yang jernih. Pengamatan lapangan menunjukkan adanya singkapan batuan yang segar maupun lapuk, dengan jurus lapisan berkisar antara N100° E hingga 105° E dan kemiringan rata-rata sekitar 4° - 8°. Ketebalan perkiraan formasi ini adalah sekitar 150-200 m. Berdasarkan analisis mikropaleontologi, spesies foraminifera planktonik dominan seperti Orbulina universa dan Sphaerodinella subdehiscens mengindikasikan rentang umur antara N10-N18. Satuan ini menunjukkan adanya struktur sedimen berlapis baik dan struktur masif gelegar, menandakan pengendapan di lingkungan yang tenang dengan energi rendah. Penelitian ini memberikan pemahaman lebih baik tentang litologi, lingkungan pengendapan, dan perkiraan umur Formasi Wonosari di wilayah penelitian. This study focuses on the characteristic of the Wonosari Formation carbonate rocks in Bunder Village, Ponjong Sub-district, Gunungkidul Regency, DIY. The lithological analysis reveals brown-colored wackstone with a bioclastic texture, consisting of 75% mud-supported carbonate/micrite and 25% grain fragments. The fossil assemblage includes planktonic and benthic foraminifera, with intact bioclastic fragments exhibiting signs of micritization and subsequent neomorphism into clear calcite spar. Field observations indicate fresh and weathered outcrops with a bedding strike ranging from N100° E to 105° E and an average dip angle of 4° - 8°. The estimated thickness of the formation is around 150-200 m. Based on micropaleontological analysis, dominant planktonic foraminifera species such as Orbulina universa and Sphaerodinella subdehiscens suggest an age range of N10-N18. The unit displays well-layered sedimentary structures and occasional massive structures, indicating deposition in a low-energy, relatively calm environment. This research contributes to a better understanding of the lithology, depositional environment, and age estimation of the Wonosari Formation in the study area..
MIOCENE PALEOGEOGRAPHIC RECONSTRUCTION IN THE SANGATTA AREA, EAST KALIMANTAN BASED ON CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY AND BENTHONIC FORAMINIFERAL ANALYSIS Jambak, Moehammad Ali; Deny, Deny; Rendy, Rendy; Syavitri, Dewi
BULLETIN OF THE MARINE GEOLOGY Vol 39, No 2 (2024)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.39.2.2024.869

Abstract

The Kutai Basin is a significant hydrocarbon potential basin with up to 15 km thickness of Tertiary sediments. It is dominated by a complex deltaic system to a marine shelf environment. Thus, it is crucial to understand the facies distribution in the area. This study was carried out to assess, correlate, and reconstruct the paleoceanographic evolution of the basin using lithological and microfossil data obtained from five exploration wells. The lithostratigraphic analysis was used to identify lithological units of each well, while the calcareous nannofossils biostratigraphy was applied to estimate the age and benthic foraminifera was analysed for paleoenvironmental interpretation. The findings reveal that the study region consisted of claystone, siltstone, shale, coal, and sandstone of the Gelingseh and Kelandasan Formation. The age of these lithological units is assigned from the Middle to Late Miocene epoch (NN6-NN11), based on the presence of some nannofossil index fossils such as Catinaster coalitus, Discoaster hamatus, Discoaster quinqueramus, Discoaster calcaris, and Coronocyclus nitescens. Benthic foraminifera assemblages are primarily composed of arenaceous species such as Trochamina spp. and Haplophragmoides spp., indicating a transitional environment, though some species such as Elphidium spp. and several planktonic foraminifera species appeared, which reflect marine influence on the research area. Based on the biofacies analysis; mudflats, tidal flats, delta front, prodelta-marine shelf, and fluvial plain were formed during the Middle to Late Miocene in the studied area.
GEOLOGI DAERAH KARANGDUWET DAN SEKITARNYA, KECAMATAN PALIYAN, KABUPATEN GUNUNGKIDUL, PROVINSI DAERAH ISTIMEWA YOGYAKARTA: GEOLOGY OF THE KARANGDUWET AREA AND ITS SURROUNDINGS, PALIYAN SUBDISTRICT, GUNUNGKIDUL REGENCY, SPECIAL REGION OF YOGYAKARTA PROVINCE Salam, Ilham Fikri; Hafiz, Surya Darma; Jambak , Moehammad Ali
Journal of Geoscience Engineering and Energy VOLUME 6, NOMOR 1, FEBRUARI 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v6i1.22259

Abstract

Zona Pegunungan Serayu merupakan bagian dari Cekungan Jawa Tengah yang identik dengan terendapkannya batuan sedimen volkaniklastik dan batuan karbonatan. Desa Karangduwet, Kecamatan Gunungkidul merupakan salah satu bagian dari Zona Pegunungan Serayu, sehingga pemetaan geologi di daerah ini sangat menarik dilakukan untuk mengetahui proses terendapkannya siklus batuan sedimen volkaniklastik dan batuan karbonat untuk menginformasikan tentang kondisi geologi dan sejarah geologi. Penelitian ini menggunakan metode deskriptif analitik yang dibagi menjadi tahapan kajian lapangan dan tahapan analisis data. Desa Karangduwet dan sekitarnya tersusun atas Satuan Batugamping Klastik Tufaan berumur Miosen Tengah‒Akhir, Satuan Batugamping Terumbu terendap kan secara menjemari terhadap Batugamping Klastik Tufaan dan Satuan Batunapal Tufaan terendapkan secara menjemari dengan Batugamping Klastik Tufaan pada Miosen Akhir. Struktur geologi yang terjadi pada lokasi ini setelah proses pengendapan seluruh batuan terjadi setelah pengendapan batuan selesai berupa perlipatan sinklin dan sesar geser mendatar. The Serayu mountain zone is part of the Central Java basin, identical to volcaniclastic sedimentary and carbonate rocks deposition. Karangduwet Village, Gunung Kidul Subdistrict, is a part of the Serayu Mountains Zone, so geological mapping in this area is very interesting to do to find out the process of deposition of volcaniclastic sedimentary rock cycles and carbonate rocks to inform about geological conditions and geological history. This study used a descriptive- analytic method divided into field study and data analysis stages. Karangduwet Village and its surroundings are composed of Mid-Late Miocene Tuffaceous Clastic Limestone Units, Reef Limestone units deposited interfingered with Tuffaceous Clastic Limestone and Tuffaceous Marlstone units deposited interfingered with Tuffaceous Clastic Limestone in the Late Miocene. The geological structures at this location after the deposition of all the rocks occur after the deposition of the stones complete in syncline folds and horizontal shear faults.
THE GENESIS OF JAKARTA AS A "BAY CITY" IN THE QUATERNARY PERIOD AND ITS IMPLICATIONS Jambak, Moehammad Ali; Susilo, Yves Belgiaswara; Nuryana, Suherman Dwi; Yuda, Himmes Putra; Amri, Muhammad Adimas; Setiawan, Naiy Salsabila; Sulyana, Deska; Lestari, Arini Dian; Jambak, Moehammad
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.20171

Abstract

Jakarta, the capital of Indonesia, is a coastal city shaped by geological and environmental processes over the past two million years of the Quaternary Period. The Jakarta Plain was formed by a mix of land sediments from the Cisadane and Citarum Rivers and marine sediments from the Java Sea. The southern region is a volcanic highland, while the city lies on lowlands with elevations ranging from 0 to 40 meters above sea level. Aims: to investigate the geological origin and sedimentary structure of the Jakarta Plain as a bay city situated between two major river deltas and to understand the implications of its geological development for spatial planning, environmental management, groundwater utilization, land subsidence, flood control, and coastal resource management, especially in the Jakarta Bay area, which features coral reef island ecosystems. Methodology and results: the research was conducted through field observations of geological outcrops and coral reef islands in Jakarta Bay, complemented by secondary data sources. The results indicate that the plain is filled by alternating layers of terrestrial and marine sediments, with strong geological connections to the surrounding Bodetabek region (Bogor, Depok, Tangerang, Bekasi). Conclusion, significance, and impact study: The study concludes that a thorough understanding of Jakarta’s sedimentary history is essential for mitigating geological risks and supporting sustainable urban development. Furthermore, Jakarta Bay’s coral reef islands hold considerable potential for tourism, underscoring the importance of integrated coastal and environmental planning based on sound geological insight.
GENESIS DAN ANALISIS KUALITAS BATUBARA BERDASARKAN KADAR ABU DAN SULFUR PADA AREA "X", LAHAT, SUMATERA SELATAN: GENESIS AND ANALYSIS OF COAL QUALITY BASED ON ASH CONTENT AND SULFUR IN AREA "X", LAHAT, SOUTH SUMATRA Chaerunnisa, Maryam; Jambak, Moehammad Ali
Journal of Geoscience Engineering and Energy VOLUME 6, NOMOR 2, AGUSTUS 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/

Abstract

Batubara yang terdapat di wilayah Sumatera Selatan umumnya menunjukkan variasi kualitas yang signifikan, dengan distribusi kandungan abu dan sulfur yang tidak merata di setiap lapisan maupun lokasi penambangan. Kualitas batubara di daerah ini dipengaruhi oleh berbagai proses geologi. Pengelolaan batubara dengan kandungan abu dan sulfur tinggi membutuhkan perhatian khusus, terutama dalam penerapan teknologi pembakaran yang efisien dan ramah lingkungan. Penelitian ini bertujuan untuk mengevaluasi kualitas batubara berdasarkan kadar abu dan sulfur pada area "X" di Lahat, Sumatera Selatan. Hasil penelitian diharapkan dapat memberikan wawasan yang lebih mendalam mengenai keterkaitan antara genesis, kadar abu, dan sulfur yang kemudian menghasilkan kesimpulan berupa faktor yang memengaruhi kadar abu dan sulfur di daerah penelitian serta dapat menganalisis pembentukan kadar abu serta sulfur. Coal in the South Sumatra region generally shows significant quality variations, with an uneven distribution of ash and sulfur content in each layer and mining site. The quality of coal in this area is influenced by various geological processes. The management of coal with high ash and sulfur content requires special attention, especially in the application of efficient and environmentally friendly combustion technology. This study aims to evaluate the quality of coal based on ash and sulfur levels in area "X" in Lahat, South Sumatra. The results of the study are expected to provide more in-depth insight into the relationship between genesis, ash content, and sulfur levels which then produce conclusions in the form of factors that affect ash and sulfur levels in the research area and can analyze the formation of ash and sulfur levels.
SOSIALISASI KUALITAS AIR DAN PENCEMARAN LINGKUNGAN DI DESA LEUWIJAMBE SENTUL KABUPATEN BOGOR Hafiz, Surya Darma; Jambak , Moehammad Ali; Herdiansyah, Firman; Satiawati, Listiana
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 4 No 2 (2022): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jamin.v4i2.14404

Abstract

Air merupakan sumber kehidupan untuk mahluk hidup. Jika tidak ada air maka tidak akan bisa kita hidup dengan baik. Kegiatan PkM dilaksanakan di Desa Leuwijambe, Kadumanggu Sentul, Kabupaten Bogor. Sampel air yang didapatkan dari 4 lokasi selanjutnya di uji kualitasnya di laboratorium air, Jakarta. Demi meningkatkan kesadaran akan penjagaan lingkungan sekitar sehingga air mempunyai kualitas yang baik merupakan tujuan utama acara sosialisasi ini dilakukan. Berdasarkan hasil dari laboratorium air, kualitas air di desa ini cenderung berkualitas rendah dan tidak dapat untuk dikonsumsi dalam jangka waktu yang lama. Karena dapat menimbulkan berbagai macam penyakit hingga berujung kematian. Maka dari itu, masyarakat dihimbau untuk menjaga kebersihan di sekitar tempat tinggalnya dan juga menjaga agar kualitas air menjadi lebih baik. Buruknya kualitas air di daerah ini dilihat dari faktor banyaknya bakteri E.coli dalam air sumur yang ada di sekitar tempat tinggal warga. Banyaknya bakteri, tingkat pH rendah, dan kandungan kimia seperti mangan dan nitrat yang tidak memenuhi standar baku dari permenkes tahun 2017 dalam air juga memperburuk kualitas air di daerah ini. Sehingga perlu dilakukan perlakuan khusus selain menjaga lingkungan hidup juga memperhatikan dan melakukan filter air supaya masyarakat bisa mendapatkan air dengan kualitas yang baik dan jauh dari berbagai penyakit.
Co-Authors Adhitama, Ramadhan Amri, Muhammad Adimas Barus, Rico Budi Wijaya Budi Wijaya Cahyaningratri Prima Riyandhani Cahyaningratri Prima Ryandhani Cahyaningratri Prima Ryandhani Chaerunnisa, Maryam Christin Palit Christmas Age Putra Saragih Dalimunthe, Yusraida Khairani Deny Deny, Deny Desta, Barona Bella Dyah Ayu Setyorini Firman Herdiansyah Firman Herdiansyah, Firman Gheovany Tresna Hafiz, Surya Darma Heni Pujiastuti Jambak, Moehammad Lestari, Arini Dian Listiana Satiawati Listiana Satiawati Listiana Satiawati, Listiana Maman Djumantara Maman Djumantara, Maman Mira Meirawaty Mira Meirawaty Muhammad Burhannudinnur Oliver Enrico Zefanya Putra, Rifky Nuraza Ramadhan Adhitama Rendy Rico Barus Rifky Nuraza Putra Salam, Ilham Fikri Saragih, Christmas Age Putra Setiawan, Naiy Salsabila Suherman Dwi Nuryana Sulyana, Deska Surya Darma Hafiz Susilo, Yves Belgiaswara Syavitri, Dewi Tengku Rafiyansyah Fajri Tresna, Gheovany Wildan Tri Koesmawardani Wildan Tri Koesmawardani Yarra Sutadiwiria Yeftamikha Yeftamikha Yeftamikha Yeftamikha Yeftamikha, Yeftamikha Yuda, Himmes Putra Yusriani, Anggi Zefanya, Oliver Enrico