Figure 3, modified from KRTA (1989), shows the Ulumbu geothermal area and its location relative to Ruteng, Heng, Ponggeok and W Kokor. As indiated earlier a reasonable • amount of surface scientificsurvey work has been completed. However, one of the technical philosophies. under…
An aapa mire was investigated peat geologically. Based on about 1500 volumentric peat samples, the depth, peat types, degree of decomposition (V. Post's methods), bulk density, water content and shear strength were examined along an 800 m transcet. The calorific value was determined from 58 respresentative peat samples from the same transect, as wel…
Marine technology is a complex science and Indonesia, needs a realistic strategy for the implementation of the relevant technology. The strategy should be evolutionary and should coincide with a national marine program, and with current prevailing domestic and international conditions. There is no doubt that present day practitioners will influence …
Dengan semakin meningkatnya kebutuhan manusia akan lahan, sumberdaya bumi sebagai tempat bermukim banyak dikhawatirkan oleh para ahli kebumian. Banyak korban timbul akibat bencana alam geologi, daya dukung alam merosot sangat cepat karena eksploitasi berlebihan dan hampir mustahil dapat diperbaharui dalam kurun waktu puluhan tahun, terjadi karena in…
Batuan pre-Tersier di Sumatera depat dibagi menjadi 4 lajur, yaitu: Lajur-lajur Bohorok - Pegunungan T,gapuluh,Kuantan - Pegunungan Duabelas, Gumai - Garba dan Lanjur Gunungkasih - Tanjungkarang. Lajur - Jajur ini merupakan suatu mintakaat yang asal - usulnya berbeda, yang dipisahkan satu sama 'n oleh suatu "suture" berupa sesar yang umumnya berahah…
Geo/ogi daerah Cikencreng, Kecamatan Cimerak dan sekitamya, Kabupaten Ciamis, Jawa Barat, dicirikan oleh penyebaran batuan gunungapi dan sedimen yang diendapkan pada umur 0/igosen hingga Miosen Akhir. Secara stratigrati daerah ini disusun oleh batuan tidak resmi, dari yang berumur tua ke muda : breksi gunungapi, tuta dasitik, batugamping dan batu…
Metallogenetic concept on mineral deposits of Indonesia as proposed by WESTERVELD is reviewed.
Depsite its general validity and practical applicability, certain geological phenomena and mineral occurrences seem to contradict the concept and therefore revisions are suggested A Metallic mineral distribution map with a scale 1:5000.000 accompanies thi…
SUatu problema diajukan pada geologis dan pada geokemis : narrer clan pengenalan zat-zat organik yang dijumpai di dalam batu-batu. Jika dianggap zat itu suatu cairan rninyak yan'} berada di dalam suatu botol, tidak ada suatu dehesitation, tapi kesulitan tirrbul untuk metlleri suatu narna (jenis) pada catatan kecil dari zat noiratre…
Fundamental questions of metallogenetic investigations are first donsidered. The difference betwen factors and indicators in metallogenetic analysis is discuss.Metallogenetic factors are geological phenomena which condition the formation of deposits.They are its cause.
The Calaveritas quadrangle is in the western foothills of the Sierra Nevada, east of the Mother Lode gold belt. Most of the quadrangle is underlain by a strongly de• formed bedrock complex that is locally covered by small deposits of undeformed stream gravels and rhyolite tuff.
The bedrock complex consists of met…