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Budi Muljana
Fakultas Teknik Geologi Universitas Padjadjaran
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Middle Eocene Nannofossil Assemblages Responding to Depositional Dynamics of the Elat Formation, Maluku Ratih C. F. Ratumanan; Vijaya Isnaniawardhani; Budi Muljana
JURNAL GEOCELEBES Vol. 7 No. 2: October 2023
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v7i2.25371

Abstract

The Kei Besar Island is mainly composed of the Elat Formation carbonate rocks. This research was conducted to determine the nannofossils assemblages in the Elat Formation to interpret the depositional dynamics during its formation. Lithological observations and sampling for nannofossil analysis were carried out on three measured stratigraphic sections: Section 1 - Hollat, Section 2 - Ngurdu, and Section 3 - Mata Hollat. A total of 47 species assigned to 25 genera of nannofossils were identified in 45 selected samples. The succession of the Elat Formation in the study area formed at NP16 to N17 or Middle Eocene. Stratigraphic reconstruction supported by biostratigraphy analysis shows that Section 3 at the lower (NP16 to NP 17), Section 2 in the middle part (NP 17), and Section 1 at the upper (NP 17). R-mode cluster analysis of nannofossils defined four species clusters (assemblies A, B, C and D) that tend to occur together. Q-mode cluster analysis defined five depth-distribution clusters (1, 2, 3, 4, and 5), each deposited under similar conditions. Based on large foraminifera, the succession was formed in fore reef setting in neritic bathymetric zone. Coarsening and thickening upward supported by the nannofossil assemblages indicate depositional dynamics which tend to be shallower. Reworked fossils, commonly found at the lower of the Elat Formation, show the mechanism of turbid currents in early deposition.
Perubahan Iklim Danau Bandung Purba Berdasarkan Analisis Palinologi, Daerah Cihideung, Lembang, Jawa Barat Rizki Satria Rachman; Winantris Winantris; Budi Muljana; Nana Sulaksana
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 1 (2020): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i1.404

Abstract

IClimate is the prevailing weather condition of an area throughout the year. Climate affects the vegetation in a region. The research aimed to study the climate and humidity change during the Holocene in Bandung Paleo-Lake based on palynomorph analysis. The twenty-four samples were taken using hand drill in 172.5 - 52.5 cm depth, continued with preparation and determination. In this study, descriptive analysis and comparison between pollen, spores and their sediments to show the climate and humidity change in Bandung Paleo-Lake. The results show that the samples which were taken on peat deposits showing four times climate changes in five zones, which characterized by montane forest pollens, i.e. Podocarpaceae and Pinaceae, lowland forest pollen i.e. Commelinaceae, Moraceae, spores from the Family Polypodiaceae, Pteridaceae and Dennstaedtiaceae, and Gramineae at the study area.Keywords: Climate, palaeo, analysis, palinology, Bandung Lake.
Depositional Environment of Deep-Water Fan Facies: A Case Study of the Middle Miocene Interval at the Kutei and North Makassar Basins Kuntadi Nugrahanto; Ildrem Syafri; Budi Muljana
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 1 (2021): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i1.574

Abstract

Massive exploration effort in the study area was conducted in 1996-2014 when deep-water drilling campaign found significant oil and gas discoveries but yet to optimally reach the middle Miocene deep-water sandstone reservoirs. Outcrops, well bores and 2D-seismic data had been incorporated in this study. Datum age from several taxon indicators have been utilized to correlate and unify various markers across the study area into four key biostratigraphy markers: M40, M45, M50, and M65. These four markers are at that point tied to the 2D seismic data in the act of the main horizons in conducting the seismic stratigraphy analysis over the study area not reached by wells. Identifying candidate of sub-regional sequence boundaries onshore and offshore that correspond with relative sea-level drops are the main result of this study. These results were integrated to generate the deep-water fan facies of the middle Miocene's gross depositional environment (GDE) maps, which generally show prograding succession easterly in the various shelf-breaks shifting laterally. The angle of slope and the horizontal length of the shelf-to-slope breaks significantly change from the Middle to Late Miocene until Recent time.Keywords: GDE, deep-water fan, Middle Miocene, Kutei, North Makassar.
Geokimia dan Analisis Lingkungan Pengendapan Batugamping Pliosen Formasi Paciran di Daerah Watuputih, Kabupaten Rembang, Provinsi Jawa Tengah Dian Novita; Budi Muljana; Moh. Heri Hemriyanto Z
Jurnal Geologi dan Sumberdaya Mineral Vol. 24 No. 2 (2023): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v24i2.729

Abstract

Batugamping Formasi Paciran berumur Pliosen tersingkap di daerah Watuputih, Rembang Jawa Tengah. Pengukuran stratigrafi rinci dengan skala 1:100 dengan total ketebalan batugamping 57,6 meter. Analisa mikrofasies menggunakan sayatan tipis menghasilkan 3 SMF yaitu burrowed biocklastic wackestone (SMF 9), bioclastic packstone with skeletal grain (SMF 10), dan rudstone abundant with algae/foraminifera (SMF18) dengan zona fasies (FZ) 7 dan 8 yaitu pada paparan laguna dengan sirkusi pada lautan terbuka kemudian berubah menjadi paparan laguna tertutup. Analisa oksida utama menyebutkan adanya korelasi positif antara CaO dan LOI yang mengindikasikan bahwa batuan memiliki kandungan material organik/karbonat yang melimpah. Persentase kehadiran oksida pengotor pada batuan karbonat seperti SiO2, Al2O3, dan Fe2O3 dijumpai dengan jumlah yang minimal mengindikasikan pada saat pembentukan batugamping sedikit mendapat pengarh dari material detritus. Rasio Ca/Mg menunjukkan batugamping Paciran di lokasi penelitian masuk dalam kelompok pure limestone yang terbentuk pada cekungan jauh dari garis pantai.Kata kunci : geokimia, batugamping, lingkungan pengendapan, Formasi Paciran 
Distribusi Foraminifera Bentonik Besar sebagai Penentu Lingkungan Pengendapan Karbonat Pliosen dari Formasi Paciran Bagian Bawah Dian Novita; Budi Muljana; Moh. Heri Hermiyanto Z
Jurnal Geologi dan Sumberdaya Mineral Vol. 24 No. 4 (2023): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v24i4.748

Abstract

Batugamping berumur Pliosen dari Formasi Paciran bagian bawah yang tersingkap di wilayah Rembang Tengah sangat menarik untuk dikaji. Terdapat perubahan suhu pada Pliosen Awal yang hangat menunju pendinginan global pada Pliosen Akhir akan mempengaruhi kumpulan foraminifera bentik besar yang sangat responsif terhadap perubahan lingkungan. Dijumpai 6 spesies foraminifera bentik besar yaitu Amphistegina sp., Alveolina sp., Cycloclypeus sp., Heterostegina sp., Lepidocyclina sp., dan Operculina sp. Kemunculan akhir dari Lepidocyclina sp. mengindikasikan batugamping terbentuk pada Pliosen Awal. Pengeplotan persentase kumpulan foraminifera pada Diagram Hallock mendapatkan hasil batugamping Formasi Paciran terendapkan pada lingkungan open platform, kemudian mengalami perubahan pendangkalan kearah sand shelf. Cekungan kembali mendalam diikuti dengan kembalinya lingkungan pengendapan di open platform. Katakunci: Batugamping, foraminifera bentik besar, lingkungan pengendapan, Pliosen.
Paleogene Deposits Distribution of the Kampar Block, Central Sumatra Basin Fikri Muhammad Fiqih; Abdurrokhim; Budi Muljana
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 1 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i1.809

Abstract

As the most prolific basin, Central Sumatra Basin is a very mature basin for hydrocarbon exploration. Most of the productive reservoir came from Neogen deposits therefore the stratigraphic reconstruction for depositional environment distribution focused on this deposits. Meanwhile the Paleogene deposits distribution and gross depositional environment (GDE) has not been explore further especially on the southern part on the basin. Paleogen deposits like Kelesa Formation is a syn rift deposition which was deposited in the center of the basin. The lithofacies development of the Kelesa Formation consist of 3 major lithofacies associations: (1) thick-bedded mudstone, (2) Interbedded sandstone and conglomerate, (3) Interbedded sandstones and mudstones. The thick-bedded mudstone is deposited in deep lake setting; interbedded sandstone and conglomerate is interpreted as alluvial fan deposit and interbedded sandstones and mudstones as a fluvial channel. GDE map of Kelesa Formation indicate that sandstones facies developed in fluvial and alluvial fan setting near the basin boundary consider as a potential for future hydrocarbon exploration. Keywords: Kelesa Formation; lithofacies; gross depositional environment; Paleogene deposits
A Combination of Embedded Markov Chain and Binomial Probability As A Tool in Sedimentary Facies Analysis Djadjang Jedi Setiadi; Iyan Haryanto; Budi Muljana; Syaiful Alam
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.9.3.291-302

Abstract

DOI:10.17014/ijog.9.3.291-302The methodology of facies analysis may include statistical examination to establish a local facies model. Without such examination, it is very difficult to predict the facies succession and to interpret the changes in depositional conditions from thick or complex stratigraphic sections. Based on the survey of sedimentary geologic literature in Indonesia, it is suggested that the aforementioned statistical method has relatively seldom been used in Indonesia. Such a situation may reflect a gap in information on the methodology and, accordingly, it seems imperative that there should be a re-exposition of the method. This paper presents a concise exposition of the combination of the embedded Markov Chain and binomial probability as one of the most successful statistical methods which are used in facies analysis. The results of previous studies of The Citalang Formation are used as a case study to illustrate its applications to the real geologic world.
POTENSI BATUBARA UNTUK PENGEMBANGAN GASIFIKASI BAWAH PERMUKAAN : STUDI KASUS DESA MACANG SAKTI, PROVINSI SUMATERA SELATAN Asep Bahtiar Purnama; Yudha S. Subarna; Yoga A. Sendjadja; Budi Muljana; Binarko Santoso
Jurnal Teknologi Mineral dan Batubara Vol 13 No 1 (2017): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2017
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol13.No1.2017.156

Abstract

Batubara yang cocok untuk kegiatan gasifikasi bawah permukaan harus memenuhi persyaratan, antara lain kondisi geologis, ketebalan, kedalaman, kadar air total dan kadar abu. Berdasarkan persyaratan ini, tidak semua batubara dalam bisa dimanfaatkan untuk kegiatan gasifikasi bawah permukaan. Kegiatan eksplorasi batubara perlu dilakukan untuk meminimalisasi risiko geologis dan untuk mengetahui kondisi batubaranya. Berdasarkan hasil permodelan, ditemukan lapisan batubara D dengan kriteria kedalaman 200-300 m, ketebalan >5 m, kadar total air lembab+kadar abu <60%, nilai kalor 4.912-6.275 kkal/kg, reflektansi vitrinit 0,23-0,44 (lignit-subbituminus). Perhitungan sumber daya batubara dengan menggunakan software yang ada dan mengacu pada aturan SNI 5015-2011, menghasilkan sumberdaya tereka 3.316.578 ton, tertunjuk 1.909.560 ton dan terukur 2.479.951 ton. 
PENENTUAN LINGKUNGAN PENGENDAPAN LAPISAN BATUBARA D, FORMASI MUARA ENIM, BLOK SUBAN BURUNG, CEKUNGAN SUMATERA SELATAN Asep Bahtiar Purnama; Silti Salinita; Sudirman Sudirman; Yoga Andriana Sendjaja; Budi Muljana
Jurnal Teknologi Mineral dan Batubara Vol 14 No 1 (2018): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2018
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol14.No1.2018.182

Abstract

Lapisan batubara D termasuk ke dalam Blok Suban Burung, Formasi Muara Enim, Subcekungan Palembang Tengah, Cekungan Sumatera Selatan, berumur Miosen Tengah sampai Miosen Akhir. Penelitian ini bertujuan untuk mengetahui karakteristik batubara dan lingkungan terhadap percontoh Lapisan Batubara D dari kegiatan pengeboran penelitian gasifikasi bawah permukaan. Metode yang digunakan adalah analisis petrografi batubara, nilai reflektansi vitrinit, dan interpretasi lingkungan pengendapan berdasarkan diagram Diessel dan diagram Calder. Lapisan batubara ini didominasi oleh vitrinit, rata-rata sekitar 71,1%, diikuti inertinit 17,6%, liptinit 5,9%, dan mineral 6,4%. Nilai reflektansi vitrinit berkisar antara 0,25-38%, termasuk ke dalam peringkat lignit-subbituminus. Berdasarkan hasil rekonstruksi lingkungan pengendapan menggunakan empat parameter TPI (Tissue Preservation Index), GI (Gelification Index), GWI (Ground Water Index) dan VI (Vegetation Index) dan diplot dalam diagram Diessel dan diagram Calder diketahui bahwa Lapisan Batubara D diendapkan dalam lingkungan pengendapan limnik.
PERKEMBANGAN SANDI STRATIGRAFI INDONESIA: Sandi Stratigrafi Indonesia 1973-1996-2023 Muljana, Budi
Bulletin of Scientific Contribution Vol 22, No 2 (2024): Bulletin of Scientific Contribution:GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v22i2.55891

Abstract

AbstrakRevisi Sandi Stratigrafi Indonesia berkorelasi dengan perkembangan data serta konsep keilmuan khususnya stratigrafi. Seiring juga dengan pola pemikiran dalam memahami serta memberlakukan data-data stratigrafi. Selama perkembangan Sandi Stratigrafi Indonesia 1973 kemudian 1996 dan yang terakhir 2023, telah mengalami banyak sekali perubahan paragdigma konsep stratigrafi. Mulai dari pendekatan deskriftif atau yang sering disebut dengan stratigrafi tradisional ke pendekatan deterministic atau sampai ke prediktif atau sering juga disebut dengan stratigrafi modern. Tulisan ini ingin memberikan informasi bahwa perkembangan Sandi Stratigrafi Indonesia hamper 50 tahun ini. Tujuannya adalah untuk mengakomodir perkembangan data, metode dan konsep stratigrafi.Kata kunci : Sandi Stratigrafi Indonesia, Stratigrafi tradisonal, Stratigrafi modern AbstractStratigraphic Indonesian Codes revision correlate with the development of data and knowledge concept, especially in stratigraphy.  It is related to the point of view within to understand and interpret for all stratigraphic data. During the development of Stratigraphic Indonesian Code starting from 1973, 1996 and the last 2023, has changed the outlook paradigm of stratigraphic concepts. Starting on descriptive approaching point view or it’s called a traditional stratigraphy to deterministic or predictive interpretations or called as a modern stratigraphy.  This paper tries to give brief information about the developments of Stratigraphic Indonesian Codes almost during 50th years. The main point is to be able accommodate the data, methods, and stratigraphic concept development.Keywords: Stratigraphic Indonesian Codes, traditional stratigraphy, modern stratigraphy
Co-Authors Abdurrokhim Abdurrokhim ⠀ Adi Hardiyono Adjat Sudradjat Adlan, Ryandi Agus Didit Haryanto -, Agus Didit Haryanto Al Suwaidi, Aisha Ali, Mohammed Andi Agus Nur Andi Agus Nur, Andi Agus Andriana S, Yoga Andriana S, Yoga Asep Bahtiar Purnama Asep Bahtiar Purnama Astriandhita, Karina Melias Azmi Baihaqi Baihaqi, Azmi Baihaqi, Azmi Bastira, Shahnaz Noveta Binarko Santoso Budiana, Rahmat Catur Purwanto Catur Purwanto, Catur Dadang Suganda Dewandra Bagus Eka Putra Dewandra Bagus Eka Putra, Dewandra Bagus Eka Dian Novita Djadjang Jedi Setiadi Djapani, Yuspian Emi Sukiyah Fauziah Hanum Fauziah Hanum Febriwan Mohammad, Febriwan Fercanza, Frisdio Fikri Muhammad Fiqih Hadian, M. Sapari Dwi Hadian, Mohammad Sapari Dwi Hendarmawan Hendarmawan Herman Darman Ildem Syafri Ildrem Sjafri Ildrem Syafri Iyan Haryanto J. T. van Gorsel Karina Melias Astriandhita Kuntadi Nugrahanto Kuntadi Nugrahanto Nugrahanto kurnianto, brany Laranarko, Dwandari Lathifah, Lista Ummu Fadzilatul Lia Jurnaliah Lili Fauzielly Luli Gustiantini M. Sapari Dwi Hadian Moh. Heri Hemriyanto Z Moh. Heri Hermiyanto Z Mohamad Sapari Hadian Morad, Sadoon Mudiarsono Mudiarsono Muhammad Kurniawan Alfadli Muhammad Zulfikar Muslin, Dicky Nana Sulaksana Naufal, Muhammad Audy Nazar Nurdin Noor Cahyo Dwi Aryanto Nuraini , Siti Nurdradjat, . Nurdrajat Nurdrajat Osvaldus, Rodrigo Prahastomi, Mochammad Praptisih Praptisih Praptisih, . Prasetya, Muhammad Nurul Huda Purna Sulastya Putra Purna Sulastya Putra, Purna Sulastya Rahmat Fakhrudin -, Rahmat Fakhrudin Ratih C. F. Ratumanan Reiza D. Dienaputra Reza Muhammad Ganjar Gani, Reza Muhammad Ganjar Rina Zuraida Rita Susilawati Rizki Satria Rachman Rizki Satria Rachman Rudy Suhendar Sangmin Hyun Santosa, Ardian Aby Sayaf, Ival Umar Setiawan, Taat Shahnaz Noveta Bastira Shaska R. Zulivandama Silti Salinita Siti Nuraini Sudirman Sudirman Sudradjat , Adjat Suganda, Wingky Suhendar, Rudy Susilawati, Rita Susilawati, Rita Swasty Aninda Piranti Syaiful Alam Syaiful Alam Taat Setiawan Teddy Tresnanto Tresnanto, Teddy Tresnanto, Teddy Undang Mardiana Vijaya Isnaniawardhani Wahyu Sugiarto Winantris Winantris Winantris Winantris Yan Rizal, Yan Yoga A. Sendjadja Yoga Andriana S Yoga Andriana Sendjaja Yudha S. Subarna Yuyun Yuniardi