Katili, J .A., i 973. Geochronology of West Indonesia and its implicatioti on plate tectonics: .Tectono:.physics, 19: 195-212. The results of radiometric dating of granitic rocks around Kotanopan near the west coastof-Ce0ntr~l umatra indicate an average age of 45 million years.
Granites from the Lissi Mass in t…
OR many years considerable de•
rnarid has existed for paints that
;reduce textured rather than conven• tional smooth films on ceilings and in• terior walls. By virtue of their texture, such paints have been able to serve r::e extremely useful purpo…
Paleomagnetic studies of lams from the island of Hawaii have established the following: (1) All lavas now exposed on the island are less than 1 million years old (Pleisto• cene). (2) The present absence of nondipole field components in the central Pacific ar…
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• Selesaai denga.n r-encana kerja Sek!:lL Penelitian Geofisika. Sub,( Direk_tor~t:Eksplorasi untuk melakuka.n penyelidikan kemagnetan Purba (Pa.leomagnetism) di Pulau-pulau Propinsi Nusatenggara, didalam tahun ~garan 1976/1977, t!. lah dilaksanakan penyelidikan kemagnetan Purba di Pulau Bali, da.n Pulau Nusapanida. Pekerjaan lapangan telah b…
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The developme~ of economic techniques of mining and concentrating taconite (fine• grained, Ierruginous jasperoids) led to the introduction of the iron-ore pellet, which is now becoming the major form in which iron is introduced into the furnace. The tre• mendous reserves of magnetic taconites of the…
IN VIEW OF their high hardness, chemical inertness and excellent mechanical behavior at high temperatures, ceramic oxides (in particular, alumina) offer excellent advantages over high speed steels and carbides for cutting tool applications. 1-6 A disadvan• tage of…
Fluid inclusions in quartz phenocrysts of quartz porphyry, quartz veinlets cutting quartz porphyry, and quartz and sphalerite in ores, were studied by the heating-stage and freezing-stage methods. Polyphase fluid. inclusions carrying transparent cubic crys• tals were especially found …