The relevant characteristic of the evolution of the Pacific continental margin of South America during the Mesozoic-Early Cenozoic has been tectonic segmentation. This has controlled succesive episodes of sedimentary accumula, Ition, extrusive and intrusive magmatism and deformation that ocurred at conververgent plate edges. …
Natural disasters are the, most serious potential threats to human being and their environments. Japan and Indonesia have the same type of natural hazards because of their similarity in tectonic setting. This was a major factor motivating the establishment of cooperative programs between Japan and Indonesia to understand the natural phenomena and th…
The Emperor vein system lies on the eastern margin of the Tavua volcanic structure. This is of Miocene age and occurs in basalts(the Mba Volcanics) probably underlain at about 2 km by calcite-rich sediments (the Vatukoro Formation). The lodes are generally flatmakes, or steep fault fillings, or complex shatter zones, and consist of quartz and altere…
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…
Historrical review of developments in peat production and processing with particullar reference to the advances borrowed from annd contributed to other industries. In today's peat technology there is virtually nothing new, most approhes have been tried before. Those that succeeded became standard practice; those that failed are too often forgotten. …
Above--ground blomass and primary production values for 40 sites representing 22 virgin mire types which occur in the southern boreal vegetation zone in finland are presenterd. Eight ameliorated sites are included in the material. The biomass ranges between 360 - 20 270 g/m2 and is strongly correlated with stem volume on forested sites. Total annua…
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 …
It is known that on the occasions of big eruptions, an enormous volume of earth crust material extrudes to the earth surface in the forms of lava flows and fragmental ejecta. The extrusion of lava is always accompanied by a movement of substances of the earth crust down beneath, resulting in the deformati…
Daerah yang diselidiki dibentuk oleh batuan yang terdiri dari batupasir, serpih, batulanau, argilit serta batuan gunung api bersusunan asam sampai mene• ngah. Beberapa kanta (lensa) batukapur juga ditemukan di daerah ini. Batuan ter~bosan yang terdapat di daerah ini bersusunan asam dan berumur Oligisen Atas Mio…
Harga komoditi bahan galian didunia mengalami gejolak yang sangat memperihatinkan akhir-akhir ini. Runtuhnya Sovyet Uni dan kemudian re-unifikasi Jerman dan yang diikuti oleh resesi di negara-negara industri maju, menyebabkan turunya harga-harga bahan galian. Indonesia sebagai penghasil utama baha-bahan galian timah, nikel dan tembaga tidak luput d…