Investigations of the acid volcanic rocks in New• Zealand have shown that the must promising perlite deposits are the glassy rhyolites of the Taupo-Rotorua and Tuirua districts. Tl,c Lest-grade rock is at Ongaroto, Maroa, Tairua, and Lake lfotoma. Large quantities …
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…
Naturally, gypsum occures as a sulphate mineral containing water of crystallization. Gypsum is used widely in industrial, construction and medical sectors. Anhydrite as its name implies is the sulphate without water of crystallization. In addition anhydrite is found in association with gypsum. Recently, domestic gypsum end-users show some sig…
Operational Research was born in the chaos of war but h~!,;boon matured in industry and peace. Now approaching manhood it is yet another tool of effective Management, attempting to provide the best decision relative to the information provided. In some circumstances O.R, cannot specify an optimum solution because one.or more…
lt management of a p-ow1dwuter irricot:i.:m project covers a wide field, requi r.ing vcj ose cooperation with other orsanis2.tions, an intensive on farm extension effort and ;i centralised repair arid madrrt enanc e serv i ce , Tho t ot.e L number o f…
This report covers my activities from August 2 to November 5,1972, in geochemical exploration as a part of the U. S. Geological Survey (USGS) program in cooperation with the Geological Survey of Indonesia (GS!) sponsored by the Government of Indonesia and the Agency for International Development (AID) under Participating Agency• Agreelll…
Mineral provinces and their connec-tions to phases of nountain building in Indonesia have been proposed by WESTERVELD (J. WESTERVELD,1952). Mineral deposits characterizing certain orogonic belt, are. grouped into one pr-ovfnco., The Malaya orogen (Lats-Jurassic) is charactarizcd by cassitorite bearing pegmatites and veins. Pyrouotasonatic iron an…
Penyelidikan endapan serpih bitumen untuk tahun anggaran 1980/1981 telah dilakukan di daerah Ombilin-Sawahlunto. Penelitian ini dimaksudkan sebagai kelanjutan proyek inventarisasi sumber daya energi serpih bitumen• di Sumatera.
Formasi Sangkarewang yang tersebar luas di daerah Talawi telah diselidikai secara mendetail. Lingkungan pengendapan ser…