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INDONESIA
Jurnal Geologi dan Sumberdaya Mineral
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.
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Articles 5 Documents
 1 
Search results for , issue " Vol 16, No 2 (2006): Jurnal Sumber Daya Geologi" : 5 Documents clear
The Stratigraphy and Lithology of the Kuma River area Buru Island, Maluku H.Harahap, Bhakti; Poedjoprajitno, Soemantri
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 2 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The stratigraphy of Kuma River area is divided into six formations, bottom to top, Dalan, Duna, Kuma, Waeken, Wakatin, and Leko Conglomerate. The Dalan Formation is Trassic in age composed of interbedded well-bedded claystone and sandstone with a typical turbidite sequences. The Duna Formation is Jurassic in age, consisting of interbedded pelagic limestone and fossil (ammonites and belemnites) rich beds. The Kuma Formation is Upper Cretaceous to Eocene age comprising well-bedded medium beds pelagic limestone with abundant planktonic forams. The Waeken is Oligocene- Miocene age and comprises micaceous mudstone. The Wakatin Formation consists of light gray massive reefal limestone containing corals, sponge, algae, bivalves and benthonic foraminifers. The Leko Formation has a Pleistocene age consisting of conglomerate. Structural geology of this area comprises anticline, syncline, and normal fault that relats to the block faulting. The presence of reservoir and source rocks and also fold structure may play an important role in hydrocarbon prospective of the area. Keywords: interbedded pelagic limestone, turbidite sequences, chert layers, hydrocarbon
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
Stratigrafi Lajur Volkano-Plutonik Daerah Gorontalo, Sulawesi Bachri, Syaiful
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 2 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Daerah penelitian merupakan bagian dari lajur volkano-plutonik Sulawesi Utara yang dikuasai oleh batuan gunung api berumur Eosen sampai Pliosen, batuan plutonik Neogen, serta batuan sedimen yang umumnya materialnya berasal dari gunung api. Satuan batuan tertua pada lajur ini, yaitu Formasi Tinombo (Eosen - Miosen Awal), terdiri atas dua fasies, yaitu batuan gunung api dan batuan sedimen. Formasi Tinombo terbentuk bersamaan dengan terjadinya intrusi gabro, yang secara selaras ditindih oleh tiga satuan berumur Miosen Tengah - Pliosen Awal yang saling menjemari dan terbentuk pada laut dalam sampai dangkal. Ketiga satuan tersebut adalah batuan gunung api Bilungala yang murni tersusun oleh batuan gunung api , Formasi Dolokapa yang tersusun oleh batuan gunung api dan sedimen, dan Formasi Randangan yang murni tersusun oleh batuan sedimen. Pada saat yang bersamaan terbentuk batuan plutonik (Diorit Bone) yang diduga komagmatik terhadap batuan gunung api Bilungala. Pada Pliosen Tengah terjadi pembentukan batuan gunung api (breksi, tuf dan lava) bersusunan menengah sampai asam, yaitu Batuan Gunung api Pani di bagian barat, Breksi Wobudu di bagian utara - tengah, dan Batuan Gunung api Motomboto di bagian timur daerah penelitian. Secara bersamaan terjadi pembentukan batuan plutonik Diorit Boliohuto yang diduga komagmatik terhadap batuan-batuan gunung api tersebut. Pada Pliosen Akhir - Plistosen Awal diendapkan Formasi Lokodidi di lingkungan laut dangkal sampai darat, berupa sedimen molasa yang diselingi tuf. Bersamaan dengan itu terjadi pula pembentukan aglomerat, lava, dan tuf dari Batuan gunung api Pinogu yang bersusunan menengah sampai asam, dan kemungkinan besar terbentuk pada lingkungan yang sama dengan endapan molasa tersebut. Batuan plutonik yang terbentuk bersamaan dengan batuan gunung api Pliosen -Plistosen ini adalah Granodiorit Bumbulan. Selama Plio-Plistosen batugamping terumbu berkembang terutama di daerah pantai selatan, endapan danau di daerah Danau Limboto, dan bersamaan dengan itu endapan teras sungai terbentuk dan terangkat pada Plio-Plistosen. Diperkirakan sejak Plistosen Awal endapan-endapan ini mengalami pengangkatan. Kata kunci: stratigrafi, litostratigrafi, lajur volkano-plutonik, Sulawesi Utara
Kaitan Potensi Sumber Daya Geologi, dan Gempa Bumi di Daerah Sinabang, Sumatera Nainggolan, D.A
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 2 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Analysis of Bouguer anomaly data in Sinabang Quadrangle produced a subsurface geological structure model including the configuration of basements of continental and oceanic crusts. Intrepretation of the anomaly patterns, the subsurface profile models including the geological structures depict the geological proseses, tectonics and its relationships with natural resources and tectonic earthquake. The qualitative analyses results of residual and Bouguer anomalies indicate that the structures in the researched area generally have northwest - southeast and southwest - northeast directions. Meanwhile the quantitative analysis shows the presence of two kinds of sedimentary rock with the density of 2.20 gr/cm-3  and 2.35 gr/cm-3  . Keywords : gravity, geological structure, earthquake, Sinabang
Perubahan Lingkungan Endapan Kuarter di Daerah Manado dan Sekitarnya, Sulawesi Utara Santoso, Santoso
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 2 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Based on nine data from subsurfaces, the development of specific Quaternary sediments in the studied area is controlled by facies of floodbasin (Fcb), beach to transitions/tidal (Fpps), swamp (Fr), channel river (Fas), volcanic eruption (Feg), volacanic eruption which is influenced by water (Fegm), beach (Fp), and nearshore (Fldp). Corelation of successions of facies reflects the deposition of palaeoenvironment that is able to be divided into three periods, characterized by transgression and regression events. The development of the palaeoenvironment of deposition indicates that the position of shoreline changed from time to time. Perhaps, this is the result of changes in the depositional regime which is closely related to tectonic events. Keywords: facies, deposition of paleoenvironment, sea surface, tectonic

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