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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Marjiyono Marjiyono, Marjiyono
Badan Tenaga Nuklir Nasional
Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science

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GEOLOGI BAWAH PERMUKAAN DATARAN KLATEN BERDASARKAN INTERPRETASI DATA MIKROTREMOR Marjiyono, Marjiyono; Ratdomopurbo, Ratdomopurbo; Suharna, Suharna; Zajuli, Moch. Heri Hermiyanto; Setianegara, Robby
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 1 (2014): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Dataran Klaten dan sekitarnya ditutupi oleh endapan fluvial vulkanik Merapi yang bersifat lepas. Hal ini menyulitkan dalam mengidentifikasi struktur geologi dibawahnya. Sehubungan dengan hal tersebut telah dilakukan pengukuran mikrotremor pada tiga (3) lintasan di daerah ini. Pengolahan data dilakukan dengan metode Horizontal to Vertical Spectral Ratio (HVSR, metode Nakamura) untuk mendapatkan penampang spektrum HVSR. Hasil pengolahan menunjukkan adanya pola struktur bawah permukaan berupa dataran, cekungan dan sesar normal yang berarah utara-selatan.Kata kunci : mikrotremor, HVSR, fluvial vulkanik Merapi, perioda/frekuensi resonansi, penampang spektrum.
STRUKTUR GEOLOGI BAWAH PERMUKAAN DANGKAL BERDASARKAN INTERPRETASI DATA GEOLISTRIK, Studi Kasus Sesar Palu Koro Marjiyono, Marjiyono; Kusumawardhani, H; Soehaimi, A
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 1 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The existence of the Palu-Koro Fault, as an active lateral fault, has no doubt. Beside seismicity indications, geodetic observations has also proved the movement of this fault. However, subsurface studies in this section is not yet widely performed. Observation of geoelectric resistivity in Palu-Koro Fault zone has been performed at several sites around of this section. Results of analysis showes the presence of fault structures observed from offsetted bedrock as step over fault.Keywords : geoelectric, resistivity, Palu-Koro Fault, step over fault.
Konfigurasi Cekungan Kuarter Wilayah Kota Mataram, Nusatenggara Barat Berdasarkan Data Mikrotremor Marjiyono, Marjiyono
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 1 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Informasi geologi bawah permukaan memegang peranan yang penting dalam berbagai aspek kehidupan dasar manusia baik yang menyangkut sumber daya alam, daya dukung dan lingkungan serta kebencanaan. Penerapan kombinasi metode mikrotremor single station dan mikrotremor array telah dilakukan untuk memodelkan kondisi bawah permukaan dangkal di wilayah Kota Mataram. Pengukuran mikrotremor single station dimaksudkan untuk memperoleh nilai frekuensi resonan tanah, adapun mikrotremor array digunakan untuk sounding kecepatan gelombang geser secara 1D. Hasil pemodelan menunjukkan ada dua lapis litologi dengan lapisan permukaan adalah endapan aluvium, sedangkan lapisan di bawahnya kemungkinan merupakan batuan sedimen yang lebih tua. Konfigurasi cekungan menunjukkan adanya tinggian di bagian timur yang membentuk pola kelurusan berarah barat daya - timur laut, sedangkan pada bagian barat menunjukkan pola cekungan-cekungan yang relatif dalam. Kata kunci : mikrotremor single station, mikrotremor array, konfigurasi cekungan, frekuensi resonan, kecepatan gelombang geser.
MIKROZONASI DAERAH KENDARI DAN SEKITARNYA BERDASARKAN RESPONS TANAH SETEMPAT Marjiyono, Marjiyono; Soehaimi, Asdani; H. Setiawan, J.
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 1 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

As one of the provincial capital city which is growing  fast, database of earth sciences is absolutely required In order to develop the secure of Kendari town. Measurement   of microtremor   in this region aims  to know the site response forward ground shacking. The result of microtremor analysis indicates that the distribution of dominant period of H/V ratio of Kendari and its surrounding area is parallel to Kendari bay, and turning south to follow the pattern of Wanggu river. Susceptibility  level in this area which  is represented by dominant period values is divided  into four categories (> 1.5 seconds, 1.5  -1.0 seconds, 1.0- 0.5 seconds, and <0.5 second). Generally, the pronest area coinciding with recent sedimentation  area, is around  Kendari  Bay and along Wanggu river, while towards outside are it is safer. Keyword:microtremor, ground shacking, Kendari
Interpretasi Geologi Bawah Permukaan dan Delineasi Cekungan Salawati Wilayah Sorong dan Sekitarnya Berdasarkan Analisis Spektral Serta Pemodelan 2D dan 3D Data Gayaberat Setiadi, S.Si.,M.T., Imam; Marjiyono, Marjiyono
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 3 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

The Salawati Basin is a matured sedimentary basin and   hydrocarbon has been produced since 1936. Several oil and gas fields have been produced in carbonate reefs and anticlinal structures. The purpose of this study  to determine basement configuration, structure patterns and  to delineate the Salawati Subbasin with   expecting to predict depocentre and the thickness of sedimentary rocks in this area. Gravity data analysis was done by using spectral analysis, high-low pass filter, 2D and 3D modeling. The result of spectral analysis shows that   the average thickness of sedimentary rocks  in this research area is 3.4 Km, and the amount of sedimentary subbasin that can be delineated are five subbasins.The most prospect area is around the Sele Strait as a basement high (possibly anticlinal) supplied from two depocentre from   the Sele Strait and Klasaman subbasin. The structure pattern that indicated from residual gravity anomaly shows basement high (anticline), transform fault and normal fault.  The 2D and 3D modeling results show that the  basement in the research areas are metamorphics  with density value 2.85 gr/cc, the layer above basement is pre-Tertiary sedimentary rock with density value 2.45 gr/cc, above the pre-Tertiary sediment is Paleogen sedimentary rock with density value 2.5 gr/cc, the top layer is Neogen sedimentary rock with density value 2.35 gr/cc. Based on the data and information, this area is   probable attractive for further investigation, especially regarding sedimentary subbasins that make oil and gas can be exploited economically.Keywords : Gravity, spectral analysis, 2D and 3D gravity modeling, Salawati Basin
IDENTIFIKASI SESAR AKTIF DAERAH CEKUNGAN BANDUNG DENGAN DATA CITRA LANDSAT DAN KEGEMPAAN Marjiyono, Marjiyono; Soehaimi, Asdani; Kamawan, Kamawan
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Seismic monitoring around Bandung basin since 1999 - 2006 which has been carried out by the Seismological Laboratory, Geological Survey Institute, had recorded nine earthquakes. Epicentre location of the earthquakes indicated that the earthquakes are associated with the lineaments interpreted on landsat image. It is concluded that there are at least five active faults in this area such as Tanjungsari - Cileunyi, Lembang, Cicalengka, Jati and Legok Kole fault. Keywords: active fault, epicenter, lineament, landsat image
Penentuan Bidang Gelincir Longsoran berdasarkan Karakteristik Fisis Batuan dengan Seismik Bias Dangkal di Daerah Cililin, Bandung Marjiyono, Marjiyono; Soehaimi, Asdani; H. Setiawan, Januar
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 6 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Hazard history of the Cililin area shows that landslides often occur there. Seismic refraction measurement has been aimed at detecting the existence of sliding planes in this area. Hagiwara method was applied for calculating the depth of layers beneath each geophone. The result of the analysis shows that the thickness of the layer which is potential to sliding is about 1.4 m in average consisting of thallus and weathering material of tuffaceous sandstone . Keyword : landslide, seismic refraction, sliding plane
MIKROZONASI BAHAYA GEMPA BUMI DI WILAYAH KOTA BANDUNG BERDASARKAN DATA MIKROTREMOR Marjiyono, Marjiyono; Afnimar, Afnimar
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 1 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Bandung is one of the metropolitan city which rapidly developed and tectonically located in the vicinity of active tectonic lines. The surface geology condition of this region vary from very soft sediments to hard volcanic rocks. The soft sediment area has potential to experience amplification when an earthquake occure. Characterization of surface geology is necessary to identify vulnerability level in order to mitigate the earthquakes hazard in this region. In this regard, we have conducted microtremor measurements in 97 sites which are spread throughout the city of Bandung. Data processing is based on the Nakamura method (HVSR) to obtain the value of amplification factor. The results show the value of amplification factor ranged from 2.1 to 17, with the highest amplification factor distribution in the southeastern of the research area. Distribution of this very high amplification factors are broadly corresponded with lacustrine sediment (lake sediment). The amplification factor scores were then used as the basis in determining the level of relative vulnerability to earthquake hazards.Keywords : microtremor, effect of surface geology, amplification factor, Nakamura methods.
Karakteristik Faktor Penguatan Gelombang Gempabumi oleh Lapisan Lunak Permukaan, Studi Kasus di Wilayah Perkotaan Cianjur dan Sekitarnya Marjiyono, Marjiyono; Hidayat, Hidayat; Hamidah, Nimas Nurul; Hawan, Shofi Iqtina; Setiawan, Johannes Bosco Januar Herry; Andriani, Shofi
Jurnal Geologi dan Sumberdaya Mineral Vol. 26 No. 4 (2025)
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v26i4.1009

Abstract

Disamping dekat dengan sumber gempabumi, wilayah perkotaan Cianjur juga beresiko terhadap penguatan gelombang gempabumi oleh lapisan lunak litologi permukaan. Endapan soil yang cukup tebal di kawasan ini berpotensi menguatkan gelombang ketika terjadi gempabumi. Hasil pemodelan data mikrotremor array di 18 titik ukur diperoleh kecepatan gelombang geser soil berkisar antara 50 m/det. - 308 m/det. Endapan soil ini menumpang di atas batuan vulkanik yang memiliki kecepatan gelombang geser antara 246 m/det – 1415 m/det. Adapun ketebalan soil berdasarkan pemodelan data mikrotremor single station di 189 titik ukur berkisar antara 2 m – 62 m. Nilai faktor penguatan gelombang oleh lapisan soil ini berkisar antara 1 - 2,4 kali dengan zona penguatan tinggi berada di daerah Cugenang, Warungkondang dan Cilaku. Berdasarkan catatan, ketiga wilayah tersebut mengalami intensitas goncangan maksimum sebesar VIIVIII skala MMI. Kata kunci: penguatan gelombang, lapisan lunak permukaan, mikrotremor array, mikrotremor single station. Abstract The Cianjur urban area is exposed to a substantial risk, particularly near the seismic source and due to site amplification, resulting from a soft surface layer. The fairly thick soil deposits potentially amplify seismic waves when an earthquake occurs. According to the microtremor array that was deployed on 18 locations, soil shear wave velocity ranges from 50 m/sec to 308 m/sec. This soil deposit lies above volcanic rock that has shear wave velocities ranging from 246 m/s to 1415 m/s. Single-station microtremor data modelling on 189 sites revealed that the soil thickness varies between 2 m and 62 m. The calculated site amplification of the research area ranges from 1 to 2.4 times, indicating that the Cugenang, Warungkondang, and Cilaku regions have significant amplification zones. Historical records showed that the highest shaking intensity in the three regions ranged from VII to VIII of the MMI scale. Keywords: site amplification, soft surface layer, array microtremor, single station microtremor  
Co-Authors A Soehaimi, A Afnimar Afnimar, Afnimar Andriani, Shofi Asdani Soehaimi, Asdani H Kusumawardhani, H Hamidah, Nimas Nurul Hawan, Shofi Iqtina Hidayat Hidayat J. H. Setiawan, J. Januar H. Setiawan, Januar Kamawan Kamawan, Kamawan Moch. Heri Hermiyanto Zajuli, Moch. Heri Hermiyanto Ratdomopurbo Ratdomopurbo, Ratdomopurbo Robby Setianegara, Robby Setiadi, S.Si.,M.T., Imam Setiawan, Johannes Bosco Januar Herry Suharna Suharna, Suharna