laporan ini merupakan risalah risalah hasil hasil kerja bagian Proyek Be.him Galian Industri. Proy-ek pemetaan dan penyelidiken mineral di Daerah dalam tab 1972 - 1973. Dalam periode in1 telah dilalcukan Penyelidikan penyelidikan pendahuluan/eksplorasi pendahuluan terhadap endapan endapan bentonit, P…
Penambangandasar samudra pada waktu ini masih dalam ta.hap pengembangan(development-stage).Pada umumnya depos:It.dasar aamudra ini terdiri dari nodul-nodul atau kentang - ken tang lau t yang istilah asingnya adalah manganese nodules dan texutama terdapat di samudra Paaifik yai tu di dae r-ah yang diaebu…
Indonesia merupakan negara vulkanik•atau daerah gunung api yang termasuk pad.a busur da1am (inner are). Busur dalam ini terdiri dari gugusan pulau pulau gunungapi baik yang ma• sih aktif maupun yang sud.ah nonaktif. Pu.1au pulau ini melipu ti pulau Sumatera, Jawa, Bali, Lombok, Sumbawa, Flores, Alor Wetar dan Sulawesi bagian barat dan u…
Dalam kurun waktu tahun 1979 - 1983, pananfaatan bahan galian felds•
par dalam negeri belum menunjukkan hal yang mengganbirakan. Hal ini
.di tunjukkan oleh data produksi, konsum.si, dan impor.
Pada tahun 1983, produksi bahan galian feldspar berjumlah 12.826 ton,
sedangkan impor berjumlah 7.230,20 ton.
Dalam tahun yang sama…
A method i:. described for the preparation of trace element reference materials by a co-precipitated gel technique. The technique is applied to the manu- facture of multi-element calibration standards for the analysis of geological materials by direct-reading emission spectrome…
Economic gold deposits may be considered to fall into four classes on the basis of the concentration and precipitation mechanism: (a) primary one-stage hydrothermal extraction. with precipitation in vein conduits or on the sea-floor, (b) hydrothermal leaching of materials which have undergone a prior Au enrichment (multistage)…
Hydrocracking is probably the most versatile of modern petroleum processes. This versatility has been achieved by the development of specific families of catalysts, of processing schemes designed to allow these catalysts to function efficiently and optimal refining relationships between hydrocraking and other refining processes.
The processing of concentrates of ilmenite and titanomagnetite in an induction-coupled plasma torch is decribed. A mixture of FeO and TiO2 was produced from ilmenite and a mixture of FeO, TiO2 and Fe2O3 from titanomagnetite. The result indicate that plasma proccesing of these minerals may be useful in indutrial applcations.
Interference effects in the determination of trace elements by atomatic-absorption spectrophotometry in applied geochemistry have been studied by a statistical appraisal and described in terms of a simple two-parameter mathematical model. The experimental design incorporated features that would allow possible deviations from the model to be detected…
Interpretation of regional geochemical survey data requires consideration of the effects of bedrock geochemistry, weathering and other secondary factors tending to modify the bedrock-soil-stream sediment relationship. Visual interpretation of complex multielement data may only serve to recognize the obvious