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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.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue " Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi" : 5 Documents clear
Ostrea (Turkostrea) Doidoiensis Hasibuan from The Bayah Formation West Jawa: A New Find Hasibuan, Fauzie
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

A species of Ostreidae conspecific with Ostrea (Turkostrea) doidoiensis Hasibuan from the Middle Eocene Malawa Formation, South SuIawesi, was also discovered from Bayah Formation, Banten, West Jawa. A juvenile form of the taxon is thought to occur in the Nanggulan Formation, Central Jawa, Correlation of the  age of the formations is considered. Paleoenvironmental implication of the taxon and its distribution in  Indonesia are discussed.Keywords: Ostrea (Turkostrea) doidoensis, Bayah formation, Malawa formation, Middle Eocene, RV (right valve). LV (left valve)
Karakteristik Endapan Kuarter di Dataran Aluvial Rawa Utara Pangkalan Balai, Kabupaten Banyuasin (Sumsel) ( Suatu Studi Awal dari Efek Perubahan Iklim dalam Proses Sedimentasi) Moechtar, Herman
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The sediments in this area are of fluvial and swarnp systems, The fluvial deposits include channel sand, and fine grained cIay of floodplain deposits. The swarnp deposits of Iine-grained include humic clay and peaty clay, the basement of this Quaternary deposits is tufaceous clay of pyroclastic.The character of Quaternary depositional style at the PangkaIan Balai and surrounding is dominantly influenced by autogenic mechanisms (internal processes), such as river channel systems and sediment supply from the    surrounding hills.  The cIimate factor of allogenic rnechanisms (externaI processes) is specific to related humidity as chemicaI, physics, or biology aspects in time.Keywords: Fasies, fluvial and swamp, internal and external process.
Penelitian Lingkungan Pantai Wilayah Pesisir Kabupaten Cirebon, Jawa Barat Astjario, Prijantono
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Nowadays, natural resources in Indonesia have been decreased because of the rapid increase in development and human population. It is most likely that marine resources will become a primary source in supporting our economics in the future.                  Marine and coastal zones seem to become areas of our main priority for industrial, agrobusiness, agroindustrial, settlement, tourism, transportation and harbour developmen. However, these areas are still having various problems or cases which couId cause their unoptimum development and managements.The decrease of seawater quality standard caused by high suspended polluted by solid and Iiquid waste, sea water intrusions, abrations and accretions, shoalings, floods, and dryness are some of  the various cases which can be found in the marine and coastaI zones. Another case which is not less important is human behaviour who have destructed mangroves and changed the function of swampy forest to become fishpond areas. The survey in the marine and coastaI areas, especially in the eastern coast of the Cirebon regency, aims to obtain data, in which these cases are potentially found by applying the coastal characteristic observation and remote sensing methods.
Karakter dan Proses Pembentukan Rangkaian Fasies Endapan Kuarter di Paparan Danau Maninjau, Kabupaten Agam (Sumatera Barat) Moechtar, Herman
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The Quatenary sediments in the studied area can be divided into fraction of coarse-grained sediments, fine-grained sediments, and both mixed grained sediment. They consist of:  (a) floodplan facies, (b) floodplain facies which are influenced by lake level rising or falling, (C) fluvial channel facies and (e) lake facies.The Quaternary sediments on margin lake Maninjau is the sedimentological response to allogenic mechanism controls. The allogenic controls are the climate, tectonics and lake level. The climate determines water and sediment as wells as the type of intervaI stratigraphic changes that can be recontructed. Tectonic and lake leveI set boundary condition to the energy of sediment supply also occurred.                Keywords: fasies, depositional environment, forming control factor
Diagenesis, coalification, and hydrocarbon generation of the Keruh Formation, In Kuantan-Singingi Area, Central Sumatera, Indonesia Heryanto, Rahmat
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi
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Abstract

The Eocene-Oligocene Keruh Formation is exposed in the western part of Kuantan-Singingi area, southwest margin of the Central Sumatera Basin. It is correlated to the Pematang Group in another part of the Central Sumatra Basin and is also to the Kelesa Formation in the Tigapuluh Mountains. The formation is composed of conglomerate and well-bedded sandstone in the lower part, interbedded mudstone and coal seams in the middle part, and mainly made up of laminated to well bedded light-dark grey to blackish organic-rich mudstones in the upper part of succession. It was deposited in a fluviatiIe to a lacustrine environment with some marine condition influences.Diagenetic processes which occurred in the Keruh Formation are compaction and formation of authigenic mineral and secondary porosity. The compaction effects are illustrated by the presence of bending of mica flakes and by grains supported fabrics with long grain contact as well as clay mineral oriented. The formation of the authigenic minerals is recorded by the presence of authigenic quartz and clay minerals, and also quartz overgrowths. The secondary porosity occurrence is caused by a dissolution of the feldspar and clay minerals. The diagenetic stage of the Keruh Formation is included into a mesogeneticsemi-mature to mature "A" which equal to mudrock stage II.Based on the maturity of this Formation reflectance within dispersed organic matter (d.o.m.) and coal of the Keruh Formation, the naturity of this Formation is included into an immature to early mature stage, whereas based on the T max and Hydrogen Index (HI)  values, the kerogen With Formation is categorized Into a late immature to early mature level.There Is a relationship between diagenetic stage and maturation of organic matter which was caused by the burial history with the depth of buriaI between 2000 to 3000. m, which  produced the paIeo temperature of 65° to 95°C.Keywords: Keruh Formation, diageneses, authigenic mineral, thermal maturation

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