Article Per Year (5 Year)
p-Index From 2020 - 2025
1.203
P-Index
This Author published in this journals
All Journal JURNAL AIR INDONESIA Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) BULLETIN OF THE MARINE GEOLOGY Jurnal Rekayasa Lingkungan Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan Jurnal Teknologi Lingkungan
Imam Setiadi, Imam
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Engineering Environmental Science

Published : 33 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 33 Documents
Search

 1   2   3   4 
Pola Struktur dan Konfigurasi Geologi Bawah Permukaan Cekungan Jawa Barat Utara berdasarkan Analisis Gayaberat Setiadi, Imam; Pratama, Achmad Wahyu
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 2 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.107 KB)

Abstract

North West Java Basin consists of several subbasins formed by a complex tectonic processes. Determining subbasin patterns and geological subsurface structure sometimes difficult to identified through geological qualitative analysis, especially in a minimum full rock outcrop condition. One of the geophysical methods that can be used to know the subbasin spreading and subsurface geological configuration is gravity method. The purpose of this research is examining the distribution pattern of sedimentary subbasin, structure patterns and subsurface geological configuration based on spectral analysis, two dimension, and three dimension gravity modeling. The result of spectral analysis shows that the average basement depth in North West Java basin is 3.3 Km. Based on the results of residual anomalies and 3D inversion shows that there are 5 subbasins; Bekasi Subbasin, Rengasdengklok Subbasin, Cikampek Subbasin, Subang Subbasin, and Majalengka Subbasin. The 2D modeling and the second vertical derivative (SVD) analysis result that the subbasin structure are controlled by some faults which forming horst-graben structures. Keywords : gravity, spectral analysis, second vertical derivative, gravity modelling, Northwest Java Basin
POLA STRUKTUR DAN GEODINAMIKA CEKUNGAN BULA, BERDASARKAN ANOMALI GAYA BERAT Setyanta, Budi; Setiadi, Imam
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1239.617 KB)

Abstract

Gravity is one of the geophysical methods that can be used to estimate subsurface condition based on the density of rocks. Seram bouguer anomaly map reduced by density 2.67 gr/cc indicates negative anomaly pattern in Bula Basin with anomaly range between ( -50 mgal – 0 mgal). Gravity data analyses were carried out by separating the residual and regional anomalies using moving average filtering and second vertical derivative. The subsurface modeling was done by using gravmag forward modeling software. The results show two regional faults i.e. the norteast-sothwest strike slip fault and the east-west thrust fault. Those faults have different periods. The filtering using moving average and second vertical derivative shows closure areas and fold within Pretertiary rocks that geologically are interesting features.Keywords : Gravity, moving average, second vertical derivative, Bula Basin
Basement Configuration and Delineation of Banyumas Sub-Basin Based On Gravity Data Analysis Setiadi, Imam
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.862 KB)

Abstract

Many oil and gas seepages occurred on thesurface of Banyumas Basin as one of the active petroleum systems manifestation. Geological complexity of this basin makes it difficult to discover the oil and gas reserves unlike the basin of the East and West Java area. The aims of this research are to determine the subsurface geological structure patterns, distribution of sedimentary sub-basin, and  basement configuration. Gravity data of Banyumas and surrounded area is analysed by using spectral analysis, moving average filter, and 2D forward modelling. The gravity data delineation analysis resulting about six sedimentary sub basins with depocentre of 5.5 km positioned at Purbalingga and Karangkobar Sub-basin. The structural pattern derived from residual gravity anomaly shows a relative southeast-northwest strike-slip fault and an east-west trend basement high pattern. Concerning from the oil and gas seepage presence in the study area, sufficient sedimentary rock thickness, and supporting petroleum system, this region is considered as an attractive subbasin for further petroleum prospect investigation. Keywords : gravity analysis, sedimentary basin, spectral analysis, moving average, 2D modelling
INTERPRETASI STRUKTUR GEOLOGI BAWAH PERMUKAAN DAERAH LEUWIDAMAR BERDASARKAN ANALISIS SPEKTRAL DATA GAYA BERAT Setiadi, Imam; Diyanti, Ai; Ardi, Nanang D
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 4 (2014): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (315.038 KB)

Abstract

Kajian analisis data gayaberat daerah Leuwidamar, Banten telah dilakukan menggunakan metode analisis spektral.Tujuannya adalah memperkirakan kedalaman batuan alas dan menginterpretasi model geologi bawah permukaan. Metode gayaberat dilakukan beralaskan anomali gayaberat yang muncul karena adanya variasi rapat massa dari penyusun material bawah permukaan bumi. Hasil analisis spektral menunjukkan dua nilai kedalaman dengan rata-rata 1,71 km yang merefleksikan kedalaman batuan alas dan 10,66 km yang mencerminkan kedalaman kerak. Berdasarkan pemodelan dua dimensi bawah permukaan diperkirakan batuan alas daerah Leuwidamar adalah andesit yang memiliki densitas sebesar 2,74 g/cc. Evolusi tektonik menyebabkan terbentuknya sesar bawah permukaan dan batuan terobosan seperti granodiorit Cihara yang memiliki densitas 2,68 g/cc di bagian selatan Leuwidamar.Kata kunci : Leuwidamar, gayaberat, analisis spektral
MODEL GEOLOGI BAWAH PERMUKAAN DAERAH MUARAWAHAU HASIL ANALISIS ANOMALI GAYA BERAT BERDASARKAN ESTIMASI KEDALAMAN DENGAN METODE ANALISIS SPEKTRAL Setyanta, Budi; Setiadi, Imam; Simamora, W.H.
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1423.233 KB)

Abstract

A Study about a depth estimation on a gravity model in Muarawahau quadrangle, East Kalimantan, by using a Spectral Analysis method is very helpful to reduce ambiguity that appears in each modeling. The qualitative analysis shows that high anomalies lay at the eastern part of  the research area with values between  10 - 55 mgal, while low gravity anomalies between  -60 to 9 mgal lay at the western area. Two groups of anomaly in this area reflect a basin and basement high which is separated by a regional strike slip fault . A Model resulted  from  East to West  profiling and supported by a Spectral Analyses Method shows that the basin is constructed by PreTertiary rocks with density of about 2.6 gr/cc and thickness approximately 5 km, experiencing tectonic deformation. The eastern high anomaly block is the reflection of ultramafik rocks and mélange with the density of about 2.65 gr/cc. Rocks in this block is partly covered by volcanic sediments abaut 500 meter thich (2.3 gr/cc). However based on the values of anomaly, those two blocks are still underlined by the same granitic continent, meanwhile the existing ultramafic rocks are only ophiolite fragmen of oceanic crust. Keywords : Gravity anomaly, depth estimation, geological model.
DELINEASI CEKUNGAN SEDIMEN SUMATRA SELATAN BERDASARKAN ANALISIS DATA GAYA BERAT Setiadi, Imam; Setyanta, Budi; Widijono, Bambang Suci
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 2 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2687.554 KB)

Abstract

South Sumatra Basin is one of large sedimentary basins in Indonesia which has been proven to produce hydrocarbon energy. Several literatures mention different amount of subbasin with this basin. Gravity is one of geophysical methods that is used to interpret lateral and vertical basin configuration based on rock density parameter. The gravity analysis is conducted by using spectral analysis method in order to estimate shallow and depth anomaly sources, and then to separate regional and residual anomaly using moving average method. The result of spectrum analyses show two discontinuity density plans, located at 3.05 km reflecting the average depth of Tertiary sedimentary basement, and at 15.98 km reflecting Moho discontinuity plane. Meanwhile, the residual anomaly shows that there are two lineament patterns trending northwest-southeast and southwest- northeast. The main fault is Sumatra Fault indicating northwest-southeast lineament, and the subsidiary faults trending southwest-northeast. Azimuth of shallow basement and rifting patterns are northwest-southeast, while the number of identified subbasin are 10. The result of two dimensional modeling shows that the basement in South Sumatra is metamorphic rock having the density contrast 0.12 gr/cc and the average density contrast of the sedimentary rocks filling the basin is -0.22 gr/cc.Keywords : gravity, spectral analyses, moving average, South Sumatra Basin
ANOMALI GAYA BERAT DAN TATAAN TEKTONIK SEKITAR PERAIRAN LAUT BANDA DAN PULAU SERAM Setyanta, Budi; Setiadi, Imam
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 6 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4460.665 KB)

Abstract

Bouguer and free air gravity anomalies  of the  Banda Sea and Seram Island are divided into southren, central and northern parts. Gravity analyses based on land measurement  combined  with ftee air anomaly data of the sea produce crust structure model which close related to rock composition and tectonic position.  Crust structure at Banda Sea is mainly composed of basaltic crust of  Banda Sea as a base and folded occurrence, collision with granitic crust border (Australian continent fragment  ?).  Banda Sea basaltic  crust is underlying volcanic sediment  Banda  Island, while granitic crust is underlying Pre-Tertiary sediment rock at Seram Island. Collision which happened since early Pliocene of two different crust has caused many things such as material from many sources in Seram Island mad melange  rock and thrust fault that appeared in the surface. Tectonic intensity has also caused some granitic crust borders to get fragmentation which reduces value of the anomaly. Further-more, it appears volcanic rock of  Banda Sea has caused gravity tectonic  toward equilibrium process basaltic  crust. This geodynamic crust   model has an implication  to geological Potency product, both in economic or disaster risk.Keywords: gravity, tectonic, evolution, geological potency
DELINEASI CEKUNGAN BUSUR MUKA SIMEULUE BERDASARKAN DATA ANOMALI GAYA BERAT Santi, Lauty Dwita; Setiadi, Imam; Panggabean, Hermes
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.72 KB)

Abstract

The study of hydrocarbon potential at the fore-arc basins of west offshore Sumatra has been done by many writers. Recently, Simeulue basin, has been put at the spotlight as the Germany's BGR research team published several latest seismic lines showing great sediment accumulation in this basin. Although many new information and speculation emerge by the result of that research, until now the exact basin boundary itself has never been discussed. Delineation process of Simeulue basin in this study is done by applying gravity anomaly data that covers a wide area enough to determine the apparent boundary of sediment distribution within the basin. A gravity anomaly profile is produced using forward modeling method, showing the geometry of the basin, with maximum length of 418 km. The northward and southward of this basin is bounded by hightopographies that separate Simeulue basin with the other adjacent basins.Keywords : Basin delineation, Gravity anomaly
Kompleks Batuan Ultramafik Meratus sebagai bagian dari Ofiolit Kerak Samudera Ditinjau dari Aspek Geomagnetik dan Gaya Berat Setyanta, Budi; Setiadi, Imam
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 6 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1619.098 KB)

Abstract

Geomagnetic and gravity analyses were carried out in the Banjarmasin quadrangle, South Kalimantan. Qualitative analysis of gravity anomaly show that ophiolite is located in the central quadrangle with anomaly values between 550 µms-2 and 750 µms-2 trending southwest-northeast.Geomagnetic qualitative analysis presents high  geomagnetic anomaly part values between 0 nT and 450 nT in the southern area, while low anomaly between -750 nT to 0 nT, generally in northern part of the sheet. Quantitative analysis was done by making subsurface geological profiles model AB, CD, and EF. Ophiolite rock from the gravity modeling have density between 2.7 gr/cc and 2.9 gr/cc. This is probably caused by fragmentation process which affect the basement oceanic rock mix by Pre-Cretaceous rock such as chert, metamorphic and carbonat rocks, accordingly this reduce the rock density, while geomagnetic model have susceptibility of 0.15 SI. Ophiolite rock was interpreted as oceanic crust bolder that overlay on the granitic crust which has less magnetization. This shows a subduction model which cause oceanic crust uplifted and laid on the upper of granitic crust and than revealed as Bobaris and Manjam ophiolite belts. Keywords : Geomagnetic, gravity, ophiolite, oceanic crust
DELINEASI CEKUNGAN SEDIMEN DAN INTERPRETASI GEOLOGI BAWAH PERMUKAAN CEKUNGAN TANIMBAR BERDASARKAN ANALISIS DATA GAYABERAT Setiadi, Imam; Riyanda, Arenda Reza
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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

Abstract

Produksi migas Indonesia semakin menurun secara bertahap, untuk kembali meningkatkan produksi migas diperlukan pencarian cadangan-cadangan  baru dengan cara melakukan penelitian pada cekungan-cekungan sedimen frontier. Salah satu metoda geofisika yang dapat digunakan untuk mendelineasi cekungan sedimen adalah metoda gayaberat. Metode gayaberat mengukur variasi percepatan gravitasi yang disebabkan karena perbedaan densitas antar batuan bawah permukaan. Penelitian gayaberat dilakukan di daerah Kepulauan Tanimbar dengan tujuan untuk mengetahui Anomali Bouguer, pola sub-cekungan, pola tinggian, struktur geologi bawah permukaan daerah penelitian melalui pemodelan 2,5D  dan inversi 3D. Pengolahan data yang dilakukan dalam penelitian meliputi : analisis spektral, analisis SVD, pemodelan 2,5D dan pemodelan inversi 3D untuk mengetahui struktur bawah permukaan daerah penelitian dan model/pola sub-cekungan Tanimbar. Hasil penelitian menunjukkan bahwa: (1) Daerah penelitian memiliki rentang anomali Bouguer antara -46,4 mGal hingga 9,6 mGal dengan anomali rendah pada bagian tengah, anomali sedang pada bagian tepi Pulau Yamdena, sedangkan anomali tinggi pada bagian tenggara dan barat laut daerah penelitian. (2) Jumlah sub-cekungan sedimen yang dapat diinterpretasi adalah sebanyak 6 sub-cekungan. (3) Pola tinggian (basement high)  mempunyai arah relatif timur laut-barat daya. (4) Hasil pemodelan bawah permukaan 2,5D menunjukan, a) batuan pengisi dari setiap sub-cekungan adalah batuan sedimen Tersier, yaitu Anggota Napal Formasi Batimafudi (Tmbm) nilai densitas 2,38 gr/cc, Formasi Batimafudi (Tmb) dengan densitas 2,37 gr/cc, Formasi Tangustabun (Tpt) dengan densitas 2,42 gr/cc dan batuan yang mengalasi sub-cekungan adalah batuan pra-tersier yakni batubasalt dengan densitas 2,7 gr/cc dari Kompleks Molu (M), b) Analisis SVD  menunjukkan letak patahan pada model 2,5D relatif sama dengan grafik SVD yang diperoleh dari peta anomali SVD.
Co-Authors Achmad Sofian agus rifai Ai Diyanti, Ai Ardiana, Citra Arenda Reza Riyanda, Arenda Reza Bambang Suci Widijono, Bambang Suci Budi Setyanta, Budi Darmawangsa, Muhammad Rizky Fani, Ayudia Mutiara Hafiz, Mu'amar Hartaja, Dinda Rita K. Hartaja, Dinda Rita K. Hartaja, Dinda Rita Krishumartani Hermes Panggabean Ikhsan, Iik Nurul Kristyawan, I Putu Angga Kustianto, Irwan Lauty Dwita Santi, Lauty Dwita Nanang D Ardi, Nanang D Nugraha, Purwaditya Oman Sulaeman, Oman Pratama, Achmad Wahyu Riza Rahardiawan Robbani, Muhammad Haqqiyuddin Robertus Haryoto Indriatmoko Satmoko Yudo W.H. Simamora, W.H. Wibowo, Ramadhana Yulinar Firdaus, Yulinar YUNUS