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Geochemistry Strontium Isotope Data, and Potassium-Argon Ages of The Andesite…
Leo, G.W., Hedge, C.E. and Marvin, R.F., 1980. Geochemistry, strontium isotope data, and potassium-argon ages of the andesite-rhyolite association in the Padang area, West Sumatra. J. Volcanol. Geotherm. Res., 7: 139-156.
Quaternary volcanoes in the Padang area on the west coast of Sumatra have produced two-pyroxene, calc-alkaline ande…
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- PMB LU 1979 - 3
Benefication Of Ironsands From Raglan
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- PMB LU 1964 - 6
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The Development of Titaniferous Ironsand Smelting
Technical problems involved in the smelting of titaniferous iron ores are discussed in relation to the development of processing methods for commercial utilization of these ores. The methods to be used for producing steel from New Zealand ironsands are described briefly.
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- PMB LU 1970 - 4
Paleomagnetism Of Hawaiian Lava Flows
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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- PMB LU 1965 - 4
Separation Of Ilmenite and Zircon From Waikato North Head Ironsands
• 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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- PMB LU 1965 - 3
Iron Ore
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…
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- PMB LU 1976 - 1
Effect Of Chromia Alloying On Machining Performanca of Alumina Ceramic Cuttin…
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…
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- PMB LU 1975 - 10
Nature and Temperature of Ore-Forming Fluids at Toyoha Mine in The Light of F…
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 …
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- PMB LU 1975 - 7
Land Subsidence Due to Ground-Water Withdrawal In The Los Banos-Kettleman Cit…
By increasing the stress tending to compact the un• consolidated deposits by as much as 50 percent, man has created the world's largest area of intense land subsid• ence in the west-central San Joaquin 'Valley. With• drawal of ground water for agriculture has caused more than 2,000 square miles to subside …
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- PMB LU 1975 - 68
Proof Testing Of Porcelain Insulators and Application of Acoustic Emission
MACROCRaCK foRMATION has been observed by the U.S. Navy in a number of porcelain base insulators used to support large radio communications towers. These cracks do not, per se, impose a severe structural limitation because the primary stresses in the insulator are compressive. In the presence of the high voltage rf fi…
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- PMB LU 1975 - 63
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