8 results on '"géologi"'
Search Results
2. Geologi dan Identifikasi Cebakan Bijih di Daerah Batubesi, Belitung Timur
- Author
-
Ngadenin, Frederikus Dian Indrastomo, Adhika Junara Karunianto, and Ersina Rakhma
- Subjects
geologi ,radioaktif ,Batubesi ,kasiterit ,bijih besi ,monasit ,Nuclear engineering. Atomic power ,TK9001-9401 - Abstract
The Batubesi area in Belitung Timur is located in the eastern part of the Southeast Asian granites tin belt zone, so that it expected as a potential area for the occurence of ore deposit such as iron and cassiterite associate with monazite and other accessories minerals. The study aimed to understand the geological setting and to determine the occurrence of primary ore deposit and its radioactive accessories minerals. The methodologies in this research are geological mapping, uranium and thorium grade measurement, petrography, mineragraphy and grain counting analysis. The area composed by granite and metasandstone units. Types of granites are biotite and hornblende granites. The geological structures founded in this area are SW-NE sinistral and NW-SE dextral faults. Ore deposit in the area is primary iron ore deposits of skarn iron tin polymetallic type where magnetite is the main mineral while monazite and zircon are radioactive accessories minerals. The other accessories minerals are hematite, ilmenite, cassiterite, and rutile.
- Published
- 2017
- Full Text
- View/download PDF
3. Kajian Geologi, Radiometri dan Geokimia Granit Banggai dan Formasi Bobong Untuk Menentukan Daerah Potensial Uranium di Pulau Taliabu, Maluku Utara
- Author
-
Ngadenin
- Subjects
Gondwana ,benua mikro ,geologi ,uranium ,micro continent ,geology ,Nuclear engineering. Atomic power ,TK9001-9401 - Abstract
Geological, radiometrical, and geochemichal studies of Banggai granites and Bobong Formation have been conducted in order to obtain potential uranium area. Taliabu island is selected for the study because Taliabu island is a micro continent fraction of the Gondwana super continent that separated at the end of the Mesozoic to Paleogene period. Some types of uranium mineralization formed in the period of Gondwana include sandstone-type, lignite coal types and vein-type. Taliabu island is a small part from the Gondwana super continent so it is expected will be found uranium mineralization or at least indications of uranium mineralization occurences. The aim of this study is to obtain uranium potential areas for the development of uranium exploration in the future. The methods used are reviewing geological, radiometric, and geochemical data from various sources. The results of review showed that geological setting, radiometric, and geochemical data gives positive indication to the formation of uranium mineralization for sandstone type. Banggai Granite is a potential uranium source. Sandstone of Bobong Formation as a potential host rock. Coal and pyrite as a potential precipitant. Potential areas for uranium is located around Bobong Formation
- Published
- 2016
- Full Text
- View/download PDF
4. Interpretasi Vulkanostratigrafi Daerah Mamuju Berdasarkan Analisis Citra Landsat-8
- Author
-
Frederikus Dian Indrastomo, I Gde Sukadana, Asep Saepuloh, Agus Handoyo Harsolumakso, and Dhatu Kamajati
- Subjects
vulkanostratigrafi ,Landsat-8 ,Mamuju ,geologi ,Nuclear engineering. Atomic power ,TK9001-9401 - Abstract
Mamuju and its surrounding area are constructed mainly by volcanic rocks. Volcanoclastic sedimentary rocks and limestones are laid above the volcanic rocks. Volcanic activities create some unique morphologies such as craters, lava domes, and pyroclastic flow paths as their volcanic products. These products are identified from their circular features characters on Landsat-8 imagery. After geometric and atmospheric corrections had been done, a visual interpretation on Landsat-8 imagery was conducted to identify structure, geomorphology, and geological condition of the area. Regional geological structures show trend to southeast – northwest direction which is affects the formation of Adang volcano. Geomorphology of the area are classified into 16 geomorphology units based on their genetic aspects, i.e Sumare fault block ridge, Mamuju cuesta ridge, Adang eruption crater, Labuhan Ranau eruption crater, Sumare eruption crater, Ampalas volcanic cone, Adang lava dome, Labuhan Ranau intrusion hill, Adang pyroclastic flow ridge, Sumare pyroclastic flow ridge, Adang volcanic remnant hills, Malunda volcanic remnant hills, Talaya volcanic remnant hills, Tapalang karst hills, Mamuju alluvium plains, and Karampuang reef terrace plains. Based on the Landsat-8 imagery interpretation result and field confirmation, the geology of Mamuju area is divided into volcanic rocks and sedimentary rocks. There are two groups of volcanic rocks; Talaya complex and Mamuju complex. The Talaya complex consists of Mambi, Malunda, and Kalukku volcanic rocks with andesitic composition, while Mamuju complex consist of Botteng, Ahu, Tapalang, Adang, Ampalas, Sumare, danLabuhanRanau volcanic rocks with andesite to leucitic basalt composition. The volcanostratigraphy of Mamuju area was constructed based on its structure, geomorphology and lithology distribution analysis. Volcanostratigraphy of Mamuju area is classified into Khuluk Talaya and Khuluk Mamuju. The Khuluk Talaya consists of Gumuk Mambi, Gumuk Malunda, and Gumuk Kalukku, while Khuluk Mamuju consists of Gumuk Botteng, Gumuk Ahu, Gumuk Tapalang, Gumuk Adang, Gumuk Ampalas, Gumuk Sumare, and Gumuk Labuhan Ranau.
- Published
- 2015
- Full Text
- View/download PDF
5. Situs Candi Sambisari Yang Pernah Terpendam
- Author
-
nfn. Masyhudi
- Subjects
deskripsi ,geologi ,situs ,arkeologi ,vulkanik ,hindu-buddha ,Archaeology ,CC1-960 - Abstract
Secara geomorfologis Situs Candi Sambisari terletak di dataran aluvial kaki Gunungapi Merapi, sehingga tanahnya subur, mudah memperoleh air dan lahannya cocok untuk bermukim dan pertanian. Alasan inilah yang sangat memungkinkan untuk didirikannya bangunan candi. Akan tetapi, karena kemudian daerah lokasi situs tersebut tertutup oleh abu volkanik sebagai akibat letusan Gunungapi Merapi yang sangat dahsyat karena adanya gabungan dari tiga tenaga tektonik, gravitasi dan volkanik hingga menyebabkan kerucut Gunungapi Merapi mengalarni sesar-gelincir hiperbolik yang cekung, maka ha! tersebut berakibat tingkat kesuburan tanah di sekitar Situs Candi Sambisari berkurang bahkan menjadi rusak, karena berdasarkan material tanah endapannya berasal dari bahan induk endapan lahar dan endapan fluvial basil rombakan bahan piroklastik letusan Gunungapi Merapi berupa boulder, gravel, pasir, dan debu. Sedangkan perkembangan tanah di sekitar Situs Sambisari masih dalam taraf awal (initial stage) yang termasuk jenis tanah regosol horison dan tanah ini belum mengalami diferensiasi horison, sehingga profil tanahnya homogen. Sifat tanah semacam ini dapat diamati melalui tekstur pasir berdebu hingga pasir debu berkerikil.
- Published
- 2005
6. Situs Candi Sambisari Yang Pernah Terpendam
- Author
-
nfn. Masyhudi
- Subjects
deskripsi ,geologi ,situs ,arkeologi ,vulkanik ,hindu-buddha ,Archaeology ,CC1-960 - Abstract
Secara geomorfologis Situs Candi Sambisari terletak di dataran aluvial kaki Gunungapi Merapi, sehingga tanahnya subur, mudah memperoleh air dan lahannya cocok untuk bermukim dan pertanian. Alasan inilah yang sangat memungkinkan untuk didirikannya bangunan candi. Akan tetapi, karena kemudian daerah lokasi situs tersebut tertutup oleh abu volkanik sebagai akibat letusan Gunungapi Merapi yang sangat dahsyat karena adanya gabungan dari tiga tenaga tektonik, gravitasi dan volkanik hingga menyebabkan kerucut Gunungapi Merapi mengalarni sesar-gelincir hiperbolik yang cekung, maka ha! tersebut berakibat tingkat kesuburan tanah di sekitar Situs Candi Sambisari berkurang bahkan menjadi rusak, karena berdasarkan material tanah endapannya berasal dari bahan induk endapan lahar dan endapan fluvial basil rombakan bahan piroklastik letusan Gunungapi Merapi berupa boulder, gravel, pasir, dan debu. Sedangkan perkembangan tanah di sekitar Situs Sambisari masih dalam taraf awal (initial stage) yang termasuk jenis tanah regosol horison dan tanah ini belum mengalami diferensiasi horison, sehingga profil tanahnya homogen. Sifat tanah semacam ini dapat diamati melalui tekstur pasir berdebu hingga pasir debu berkerikil.
- Published
- 2005
- Full Text
- View/download PDF
7. Sumberdaya Batuan Dan Pemanfaatannya Pada Beberapa Situs Megalitik Di Kawasan Jember
- Author
-
Fadhlan S. Intan
- Subjects
geologi ,potensi ,megalitik ,jawa timur ,sebaran ,Archaeology ,CC1-960 - Abstract
Kawasan Jember, merupakan suatu wilayah yang sangat tepat untuk dijadikan sebagai suatu lokasi pemukiman megalitik. Hal ini didukung dengan kondisi geologi yang secara umum sangat menunjang. Sumberdaya alam (batuan, air) yang melimpah, telah dimanfaatkan secara optimal oleh masyarakat megalitik di kawasan Jember. Masyarakat megalitik Jember telah menerapkan konsep adaptasi dalam mempertahankan kehidupannya.
- Published
- 2001
8. Sumberdaya Batuan Dan Pemanfaatannya Pada Beberapa Situs Megalitik Di Kawasan Jember
- Author
-
Fadhlan S. Intan
- Subjects
geologi ,potensi ,megalitik ,jawa timur ,sebaran ,Archaeology ,CC1-960 - Abstract
Kawasan Jember, merupakan suatu wilayah yang sangat tepat untuk dijadikan sebagai suatu lokasi pemukiman megalitik. Hal ini didukung dengan kondisi geologi yang secara umum sangat menunjang. Sumberdaya alam (batuan, air) yang melimpah, telah dimanfaatkan secara optimal oleh masyarakat megalitik di kawasan Jember. Masyarakat megalitik Jember telah menerapkan konsep adaptasi dalam mempertahankan kehidupannya.
- Published
- 2001
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.