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Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Published by Kementerian Energi dan Sumber Daya Mineral
ISSN : 08539634     EISSN : 25494759     DOI : -
Core Subject : Science, Education, Social, Engineering,
Education Energy Engineering Environmental Science
Jurnal Geologi dan Sumberdaya Mineral (JGSM) is an Indonesian scientific journal published by the Center for Geological Survey, Geological Agency, Ministry of Energy and Mineral Resources. The journal receives Indonesian or English articles. Those articles are selected and reviewed by our professional editors and peer reviewers.
Arjuna Subject : -
Articles 341 Documents
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Re-Interpretasi Formasi Kerek Di Daerah Klantung, Kendal, Berdasarkan Data Stratigrafi dan Foraminifera Putra, Purna Sulastya; Praptisih, Praptisih
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Rock unit crops out surrounding the Cipluk oil field is part of the Kerek Formation according to the regional geological map, however, the stratigraphy, depositional environment and relative age of the rock unit is not clearly recognised. Detailed stratigraphic and micropaleontological studies have been done in the rock unit surrounding the Cipluk of  oil field. The results show that the rock outcrops in the study area are composed by a repetition of marl intercalated by sandstones,identified as turbiditic facies part of a channel portion of supra fan lobe to outer fan that deposited in an upper bathyal. Based on planktonic foraminifera content, the relative age of rockunit is Pliocene to Late Pleistocene. According to the litological characteristics and relative age data, the rock unit in studied area seems to be not part of the Kerek Formation, but it belongs to part of the Kalibeng Formation. The result of this study is very important for updating the surface geological data in which will be very useful to understand the new petroleum system in this area. Keywords: Kerek Formation, Cipluk oil field, turbidite, Kalibeng Formation
TECTONOSTRATIGRAPHY OF THE EASTERN PART OF SULAWESI,INDONESIA. IN RELATION TO THE TERRANE ORIGINS Martosuwito, Surono
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Geologically the eastern part of Sulawesi is the one of the most complex area in Indonesia. It is formed by two difference composition and origin terranes: ophiolite complex and its pelagic sediment cover and continental terranes, both covered by Sulawesi molasse. The ophiolite and pelagic sedimentary cover had been thrusted over the continental terranes during Late Oligocene-Middle Miocene. After the collision, the Sulawesi molasse was unconformably deposited. The ophiolite was formed in a mid-oceanic ridge, within the Pacific Plate. The continental terranes, in the other hand, were originated from the northern margin of the Australian Continent.Key words: Continental fragment, ophiolite, terrane, and origin
Struktur dan Geometri Cekungan Oil Shale di Daerah Taluk, Riau, Berdasarkan Metode Gaya Berat Panjaitan, Saultan
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 2 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Gravity anomaly in Taluk area can be grouped into: a. high gravity anomaly of 19 mgal to 55 mgal showing the Pretertiary high faulted to the surface. b. low gravity anomaly of 19 mgal to - 25 mgal predicted as a sedimentery basin. Distribution of oil shale of Keruh Formation is very limited. However, based on the result of investigation using gravity method, the subsurface basin configuration where the Keruh Formation occured is marked by a low anomaly from 0 to – 8 mgal and is situated in fault contact of the Kuantan Formation covered by yonger rock. Anticlines comprising : anticlines of Jakai, Taluk, and Lipai were formed by residual anomaly of 0 mgal to 11 mgal. The Jakai anticlines shows more extended dimension. While the Emas and Logen anticlines have much smaller dimension with lower anomaly. Muarapantai and Kualanangau anticlines in the northeast part have never been drilled. Anticline of Muarapantai was assumed to contain oil shale in TBS. Keywords: Taluk ,oil shale, basin ,anticlines, fault, anomaly,gravity
PETROLOGI DAN GEOKIMIA BATUAN GUNUNG API TERSIER JELAI DI DAERAH MALINAU, KALIMANTAN TIMUR: Implikasi tektoniknya Baharuddin, Baharuddin
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 4 (2011): Jurnal Sumber Daya Geologi
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Abstract

Geology of Malinau region in east Kalimantan is very little known because of its difficulties in accessibility. The aim of this study is to present petrology and geochemical data of the Tertiary Jelai Volcanic rocks and its tectonic implications. Nine samples have been analysed using XRF (major elements) and ICP-MS (trace and rare earth elements) methods and three samples were examined for absolute age dating using a K-Ar method. The Tertiary Jelai volcanic rocks in Malinau area are dykes and lavas having basalt-andesite-dacite in composition . Based on petrology and geochemistry data, the Jelai Volcanic rocks are medium medium calc-alkaline to tholeiitic series. Depletion of Nb and Ti indicates an island arc affinity. Absolute age dating using potassium-argon method for three rock samples yielded ages that vary from 16.13 ± 2.67 to 14.72 ± 0.90 m.a. or Neogene-Miocene-Burdigalian to Neogene-Miocene-Langhian. It can be concluded that the existence of Jelai volcanic rock is strongly related to subduction of the Palawan Oceanic Plate beneath East Kalimantan during the Middle Miocene soon after subduction of the South Chine Sea Plate ceased which is formed the Sintang Intrusives during the Oligo-Miocene time.Keywords: Tertiary Jelai volcanic rocks, petrology, geochemistry and tectonic
Aktifitas Tektonik di Sulawesi dan Sekitarnya Sejak Mesozoikum Hingga Kini Sebagai Akibat Interaksi Aktifitas Tektonik Lempeng Tektonik Utama di Sekitarnya Zakaria, Zufialdi; Sidarto, Sidarto
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 3 (2015): Jurnal Geologi dan Sumberdaya Mineral
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Abstract

Aktifitas tektonik Lempeng Indo-Australia, Lempeng Pasifik dan Lempeng Eurasia di sekitar Pulau Sulawesi telah berperan besar terhadap perkembangan tektonik di Sulawesi dan sekitarnya. Pengaruh tersebut diawali sejak zaman Mesozoikum, saat terjadinya pemekaran di paparan baratlaut Australia yang diikuti pecahnya tepian Benua Australia yang membentuk beberapa mikrokontinen. Mikrokontinen – mikrokontinen tersebut bergerak ke arah Sulawesi melalui mekanisme sesar transform hingga bertabrakan dengan Busur Sulawesi dan diikuti terbentuknya berbagai struktur geologi seperti tunjaman, sesar naik dan sesar mendatar berskala besar. Dari arah timur bagian utara, sebagai pengaruh gerakan Lempeng Australia ke utara dan Lempeng Pasifik ke barat, maka terbentuk sesar transform mengiri yang membawa mikrokontinen ke arah Sulawesi hingga bertabrakan dengan Sulawesi dan membentuk sesar naik Batui. Sementara dari arah utara, rotasi yang terjadi pada dasar Laut Sulawesi ikut berperan terhadap perkembangan tektonik lengan utara Sulawesi. Di lain pihak, pada Eosen Tengah terjadi pemekaran tepian Benua Eurasia di sebelah barat Sulawesi yang menghasilkan fase bukaan Selat Makassar. Namun diduga mulai pasca Miosen hingga kini daerah ini mengalami fase kompresi yang antara lain menghasilkan 2 lajur lipatan – sesar naik di Sulawesi Barat.Kata kunci - Tektonik, Sulawesi, Lempeng Indo-Australia, Lempeng Pasifik, Lempeng Eurasia, mikrokontinen, sesar transform.
MEDAN GAYA BERAT DAN MODEL GEODINAMIKA DI SEKITAR KEPULAUAN KAI DAN KEPULAUAN ARU, MALUKU Setyanta, Budi
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 6 (2010): Jurnal Sumber Daya Geologi
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Abstract

A gravity measurement was done to study geodynamic model in Kai and Aru islands. Bouguer anomaly in Kai-Aru region can be separated into two groups namely, western part of anomaly group with slighth up and down sharp gradient and the eastern part of anomaly group which is slightly smooth. Both groups of anomaly range from -180 mgals to 200 mgals and is interpreted that the lithologies in that area are underlain by continental crust. A geodynamic hypothesis around Kai-Aru islads based on subsurface gravity model shows that the Kai islands are constructed by thrusting mechanism whereas the Aru islands are by drifting mechanism and followed by gravitational tectonic mechanism. Both mechanism are influenced by changing mechanism from compressional to extentional tectonic regime.Key words : Bouguer anomaly, tectonic mechanism, geodynamics, Maluku
GEOLOGI KUARTER DATARAN PANTAI JEPARA, JAWA TENGAH Lumbanbatu, Ungkap M; Hidayat, Suyatman; Sukapti, Woro Sri; Patriani, Emma Yan
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 1 (2014): Jurnal Geologi dan Sumberdaya Mineral
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Abstract

Untuk mengetahui dinamika Kuarter di daerah penelitian, urut-urutan lingkungan pengendapan baik secara vertikal dan mendatar perlu dilakukan. Selain itu, untuk menafsirkan proses pengisian cekungan sedimen, korelasi beberapa penampang stratigrafi sangat diperlukan. Pengumpulan data geologi bawah permukaan dilakukan dengan pemboran dangkal menggunakan bor tangan. Sejumlah 52 pemboran telah dilakukan dengan kedalaman maksimum 11,50 m dan total kedalalaman 268,61m. Berdasarkan data tersebut diketahui bahwa satuan batuan di daerah ini dapat dipisahkan Tanah penutup (S), endapan dataran banjir (FP), endapan cekungan banjir (FB), endapan alur Sungai Purba), endapan pasir dataran pantai (B), endapan pasir pematang pantai (BS), endapan rawa bakau (SW), endapan paya (LG), koral / reef (Q), endapan laut dangkal (SM), endapan volkanik / (V), endapan pre-Holosen (pHs). Secara vertikal kombinasi urut-urutan lingkungan pengendapan tersebut menghasilkan 16 tipe penampang. Hasilnya beberapa fenomena geologi dapat diamati seperti adanya perulangan lingkungan endapan rawa, satu indikasi daerah yang mengalami penurunan secara perlahan lahan. Kehadiran endapan volkanik muda berupa tuf dapat ditafsirkan sebagai hasil aktivitas Gunung api Muria paling Muda. Indikasi proses-proses progradasi atau retrogradasi garis pantai ditunjukkan oleh proporsi mangrove yang perlahan-lahan semakin berkurang sementara polen-polen grassland semakin meningkat. Dari kedalaman 150 cm, kecenderungan perubahan itu berbalik yaitu proporsi polen-polen mangrove semakin bertambah sementara polen-polen grassland semakin berkurang. Secara umum kondisi cekungan sedimen pada saat proses pengendapan adalah dalam kondisi tenang (stabil). Dengan demikian abrasi tidak berhubungan dengan kegiatan tektonika.Kata kunci : Dinamika kuarter, retrogradasi, progradasi, kondisi tenang
IDENTIFIKASI GUNUNG API PURBA DI DAERAH SAPAYA, SULAWESI SELATAN PADA DATA INDERAAN JAUH Sidarto, Sidarto; Hartono, Udi
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 6 (2009): Jurnal Sumber Daya Geologi
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Abstract

In Tertiary, the South Arm of Sulawesi Island is a volcanic arc represented by Camba Formation having a relatively wide distribution. Integration of landsat and IFSAR images is able to visualize volcanic morphological features, lithology and volcanic structures that are used to identify ancient volcanoes in Sapaya area and surroundings. The result of geological interpretation on the images indicated there were two ancient volcanoes in this area, involving Sapaya and Bantoloe Volcanoes. The Middle Miocene - Pliocene Sapaya Volcano shows eroded cone feature, consisting of breccia volcanic (proximal facies), tuff (medial facies), and conglomerate (distal facies) units, and the vokanic structures are caldera, and radier intrusion basalts; while the Pliocene Bantoloe Volcano is identified by an eroded cone morphology, consisting of volcanic breccia of Bentoloe (proximal facies), lava Bantoloe (central testes), and diorite showing a deep seated intrusion (central facies). The Sapaya Volcano might be controlled by Tithyan type subduction showing a collision between micro continental which is part of Australian Continent and Eurasian Continent Plates. Keywords: South Arm Sulawesi, morphology, lithology, volcanic structure, ancient volcanoes, landsat and IFSAR Images       
PENYEBARAN SEDIMEN MENGANDUNG MINERAL BERAT DI PANTAI DAN PERAIRAN BAGIAN SELATAN BANYUWANGI Usman, Ediar
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 5 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Territorial waters of southern part of Banyuwangi  are located in the southern  slope of Southern  Mountains of Jawa, included  in fore arc basin which is very rich in heavy minerals.   The heavy minerals are the result of volcanic activity along the Southern Mountains of Jawa.  Its products have been transported and deposited along the south coast and sea floor of the Southern Waters of Jawa.Results of analysis of sediments  collected from the coastal area and sea floor in the southtern part of Banyuwangi, indicate high content of heavy mineral especially magnetite.  The heavy minerals which are present within sands are dominated by fine to coarse fractions, i.e.  Sand (S), silty sand (zS), sandy silt (sZ) and gravelly sand (gS).  They are distributed from coastal plain to offshore area. Some samples show that the content of heavy minerals range from 80 to 100% in weight. Rate of Fe content  within magnetite along the sooth part of Banyuwangi  ranges between  6,8 and 30, 6%, whereas that on the sea between 3,3- 27,4%. Result of seismic record interpretation shows that thickness of the sediment containing the heavy minerals is approximately 20 meters from sea floor. Keywords: sea floor sediment, heavy mineral, magnetite, southern part of waters, Banyuwangi
POTENSI BENCANA PELULUKAN DI DAERAH LABUHAN KABUPATEN PANDEGLANG PROVINSI BANTEN Lumbanbatu, U. M.; Hidayat, S.; Poedjopradjitno, S.
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 2 (2012): Jurnal Sumber Daya Geologi
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Abstract

Was done Labuhan, Banten Province, and sourounding area located on alluvial plain are composed of loose, water saturated clastic sediments such as gravel, sand, silt and clay, suseceptible to liquefaction. Investigation of potensial liquefaction hazards to identify degree of liquefaction susceptibility and its ditribution in investigated area. An earthquake source zone trigger liquefaction origionated by subduction activity as well as by activation of faulst on Sunda Strait. To obtain subsurface geological data hand drilling were conducted getting 59 bore holes; known a liqueable material such as sand deposited on beach sand, beach ridges, and palaeo channel deposits. On the basis of grain size distribution and its physical characteristics, stratigraphical position, ground water level, liquefaction susceptibility in this area can be divided into high liquefaction susceptibilityintermediate liquefaction susceptibility, low liquefaction susceptibility, and very low liquefaction susceptibilityKey words : liquefaction, earthquake, water saturated sand, labuhan

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