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Saultan Panjaitan
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PROSPEK MIGAS PADA CEKUNGAN JAWA TIMUR DENGAN PENGAMATAN METODE GAYABERAT Saultan Panjaitan
Buletin Sumber Daya Geologi Vol. 5 No. 3 (2010): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v5i3.266

Abstract

Anomali Bouguer  didaerah Cekungan Jawa Timur  dapat di kelompokkan kedalam  (3)   tiga bagian yaitu: a. Anomali gayaberat  tinggi dari kisaran   20  mGal  hingga  60  mGal  membentuk tinggian   batugamping.  b. Anomali gayaberat  sedang dari kisaran  0 mGal hingga 20 mGal dibentuk oleh cekungan batuan sedimen.   c. Anomali gayaberat rendah dari kisaran 0 mGal hingga – 50 mGal dibentuk oleh rendahan  Zona Kendeng. Tinggian antiklin yang terkait dengan migas  terbentuk pada dua  jalur yaitu Zona Rembang di utara dan Zona Randublatung di selatan.  Anomali   5 mGal  hingga  37 mGal pada anomali sisa dianggap prospek sedangkan   < dari  5 mGal kurang prospek.  Batuan reservoir terbentuk   pada rapat massa  2,7 gr/cm³ dari batugamping Formasi Kujung bagian atas, Formasi Ngimbang bagian atas dan  batupasir Ngrayong bagian atas hingga Formasi Ledok dan Formasi Lidah. Ketebalan batuan reservoir terbentuk antara   ± 800 hingga 1100 meter  pada kedalaman ± 1500   hingga 2500 meter.  Batuan induk terbentuk pada anomali  0 mGal hingga – 35 mGal di Cekungan Lamongan dan Rembang dari serpih   terestrial  Formasi Ngimbang Bawah, Kujung Bawah dan Formasi Tawun.  Batuan alas  diperkirakan disusun oleh Kompleks Melange terdiri atas batuan metamorf dan batuan beku mempunyai rapat massa  2,9 gr/cm³ dengan  kedalaman yang bervariasi akibat pematahan bongkah pada batuan alas.
Dinamika Dan Evolusi Cekungan Ketungau Kalimantan Barat Berdasarkan Metode Gayaberat Saultan Panjaitan
Jurnal Geologi dan Sumberdaya Mineral Vol. 16 No. 2 (2015): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v16i2.45

Abstract

Di Cekungan Ketungau telah ditemukan rembesan migas di Sungai Sinaning, di hilir Sungai Puturau dan Sungai Ara. Sampai sekarang migas belum ditemukan didaerah ini sehingga dilakukan penelitian gayaberat untuk melokalisir struktur perangkap antiklin yang terkait dengan waduk migas. Hasil penelitian gayaberat anomali Bouguer dapat dibagi kedalam dua (2) kelompok yaitu: Kelompok anomali gayaberat 16 mGal hingga 58 mGal dibentuk oleh tinggian Semitau dan kelompok anomali gayaberat 8 mGal hingga 16 mGal adalah cekungan batuan sedimen. Pada anomali sisa lebar cekungan ± 35 km, panjang ± 60 km dan ketebalan ± 5000 m arah barat-timur. Cekungan Ketungau dikontrol oleh sesar naik dan sesar normal membentuk amblesan, sehingga sulit terbentuk antiklin lokal sebagai perangkap migas didalam cekungan itu sendiri. Struktur yang terbentuk terdiri dari sesar naik, sesar normal arah barat-timur dan sesar geser arah utara-selatan memotong sesar naik. Cekungan Ketungau terbentuk pada busur muka saat Kalimantan berrotasi mengiri sejak Oligosen-Miosen sebesar 60º pada deformasi fase ketiga. Batuan alas diduga ofiolit atau sedimen samudera dengan rapat massa 3.1 gr/cm³ yang mengalami pematahan bongkah.Kata kunci - Gayaberat, cekungan, gas, anomali sisa, rapat massa, sesar, antiklin, sinklin, batuan alas, rotasi, deformasi, paleomagnetik.
GEOLOGI DAERAH PANAS BUMI ULUBELU TANGGAMUS, LAMPUNG UTARA BERDASARKAN ANALISIS METODE MAGNETOTELLURIK (MT) Saultan Panjaitan
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 | DOI: 10.33332/jgsm.geologi.v20i2.163

Abstract

Low resistivities of 0 – 15 Ώ m are interpreted as impermeable zones, functiming as cap rocks wich is hydrothermal alteration estimated to cinsist of clay. The midle resistivity 15 – 70 Ώ m is interpreted as permeable reservoir rocks located at 1250 – 2000 metres depth. The resistivity > 1000 Ώ m are metamorphic carbonate rocks. Block I in south of Mt.Rendingan and Block II at around Pagaralam hot spring formed up flow zone fluid reservoir having temperature of more than 260ºC, and contained 80 % vapour faction.Keywords: Geothermal,resistivity, impermeable, cap rock, hydrothermal alteration
INDIKASI FENOMENA STRUKTUR GEOLOGI BAWAH PERMUKAAN DAERAH RENCANA TAPAK PEMBANGKIT LISTRIK TENAGA NUKLIR GUNUNG API GENUK DAN SEKITARNYA, JEPARA, JAWA TENGAH Saultan Panjaitan; Subagio Subagio
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 1 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i1.193

Abstract

Generally, gravity anomaly pattern in research area is devided into two groups, high anomaly with the value ranges from 37 mgal to 43 mgal, and low anomaly, varies from 10 mgal to 37 mgal. The high anomaly group might be caused by the existing volcanic Quartenary rocks, and the low anomaly group indicates a sedimentary basin. Based on the result of 3 quantitative analysis, the high anomaly group reflects the existing volcanic Quartenary rocks with density 2.8 gr/cm relatively higher than surrounding. Analysis also shows in the site plan of Ujung Lemahabang the predicted faults are not encountered. The area in radius 5 km from research area, predicted the capable fault not exist in radius 25 km, found two faults ofshore and three faults in western part of investigation area. Keywords : Lemahabang, gravity anomaly, sedimentary basin arc fault
PENELITIAN PALEOMAGNETIK DAN GAYA BERAT KAITANNYA DENGAN PEMBENTUKAN FORMASI BATUAN DI SULAWESI SELATAN SERTA HUBUNGANNYA DENGAN SELAT MAKASAR DAN KALIMANTAN Saultan Panjaitan
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 5 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i5.214

Abstract

Rocks formed in South Sulawesi consist of: 1. Ultramaphic rocks of Triassic age having the polarity D= 268°, I= -45°, rotation anticlockwise 92°, and paleolatitude position -26.50°S. 2. The melange complexes of Cretaceous age having the polarity D= 330°, I= - 30°, rotation anticlockwise 30° and paleo lattitude position - 16.10°S. 3. Tonasa Formation of Middle Miocene-Early Eocene age having polarity D= 280°, I= -28°, rotation anticlockwise 80° and paleo latitude position -14.80°S. 4. Camba Formation of Middle-Late Miocene age having the polarity D= 279°, I= -24°, rotation anticlockwise 81° and paleo latitude position - 12.5°S 5. Limestones of Tacipi Member from Walanae Formation of Middle Miocene age, having polarity D= 280°, I= -9° rotation anticlockwise 80°, and paleo latitude position -4.5°S. 6. Sandstone of Walanae Formation of Pleistocene age and upper layer having the polarity D= 358°, I= -7°, very small rotation anticlockwise between 0° – 2° S and paleo latitude position -3.5°S. Gravity analysis , Paleomagnetism and GPS analysis indicate that rotation occured in South Sulawesi since Trias until now is anticlockwise. There for rifting concept in Makasar Strait at Recent diagram is less acceptable. Kalimantan and Sulawesi possible had ever closed as indicated from the movement of Kalimantan to the south since Late Trias at -17°S. At the same age Sulawesi moved northward to latitude -16.10°S. Then both islands were amalgamed and moved together northward with anticlockwise rotation between 50° to 92°. During the Trias age Kalimantan was derived from Asian Continent,while rock group in South Sulawesi at the same age were derived from south latitude and then moved together, by Australian continent movement. Keywords: rifting, paleomagnetic, anticlockwise, latitude, rotation, sea floor, strait.
APLIKASI METODE GAYA BERAT UNTUK INDENTIFIKASI POTENSI HIDROKARBON DI DALAM CEKUNGAN JAKARTA DAN SEKITARNYA Saultan Panjaitan
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 6 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i6.218

Abstract

Bouguer anomaly in Jakarta Basin can be grouped into 2 parts there are the Bouguer anomaly of 40 mgal to 60 mgal showing limestone and volcanic breccia. Bouguer anomalies 20 mgal to 40 mgal indicate sedimentary rock basin. Rock units based on residual anomaly are grouped into 6 parts: Kaliwangu Formation or Cisubuh Formation with a density of 2.5 gr /cm3, Subang Formation with a density of 2.45 gr / cm3, Parigi Formation / Cibulakan with a density of 2.7 gr / cm3, Jatiluhur Formation with a density of 2. 6 gr / cm3, Jatibarang Formation 2.8 gr/cm3, metamorphic bed rocks / intrusive rocks with a density of 2.9 gr /cm3, Rengasdengklok and Karawang anticline are interpreted as a good prospective hydrocarbon formed in a residual anomaly of 10 mgal with a density 2.7 gr / cm3 depthness between. 1900-2200m. Jakarta anticline to the south and Bekasi anticline are interpreted as having the prospect with residual anomalies of 0-4 mgal, but having a smaller dimension. Lower Cibulakan Formation is as the source rock consisting of shale lacustrine, and the reservoir rocks are Cibulakan and Parigi Formation with the thickness of + 400 m consisting of limestone cavities. Pretertiary bedrock with the density of 2.9 gr/ cm3 consists of metamorphic / igneous rocks .  Keywords: gravity, residual anomaly, formation, anticline, oil and gas
PENELITIAN LAPISAN AIR TANAH DENGAN METOD GEOLOGI PERMUKAAN, GAYA BERAT DAN GEOLISTRIK DI CEKUNGAN BANDUNG TIMUR Saultan Panjaitan
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i2.280

Abstract

Bouguer anomaly of 20 to 44 mgal are interpreted as igneous rocks and volcanic sediments. On the other hand, low Bouguer anomaly of 8 mgal to 20 mgal reflect the Bandung Basin. The Bandung Basin can be divided into two smaller basins, they are the Western Bandung Basin and the Eastern Bandung Basin. The Eastern Bandung Basin is marked by Bouguer anomaly of 10 mgal. The two smaller basins are separated by a high Bouguer anomaly of 30 mgal trending from south of Mount Malabar to the north of Ujungberung subdistrict. The thickness of Quaternary layers in the Eastern Bandung Basin at gravity profile is between 400 - 1000 m. This interpretation is supported by the resistivity value of ? around 551 ohm. Groundwater layers can be groupped into two parts: the shallow and deep groundwater. Shallow groundwater is found at the depth of 13 - 35 m with ? 8 - 13.2 ohm metres. Deep groundwater is located at depth of 70 m with ? 2.8 - 8.5 ohm metres. The shallow and deep groundwater layers are separated one from the other by impermeable rocks with ? value varies up to 551 ohm metres.
Co-Authors Subagio Subagio