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…
Industrial mineral industries in Indonesia are facing a lot problems that exhibited their developments. For a deve• loping country such as Indonesia these problems should be resolved as soon as possible. Moreover now Indonesia has started to enter the take-off phase in term of the national development. It means that Indonesia will become a …
Bahan galian industri (mineral industri dan batuan) mer-upakan ahan tambang yang sangat di perlukan untuk kehidupan sehari-hari, ermasuk dalam menunjang pembangunan fisik. Meskipun nilai atau arga bahan gal i an i ndu st r i r el ati f mur ah , namun dalam pengelolaanya cepat menghasilkan ( quick yi e Ldi n qs ) sehing…
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…
Perlite is a glassy yolcanic roc~which 'fill upon rapid and controlled heating, expand or l:lpop" into a frothy material of low bulk density -valued as a ,lightweight aggregate. Occurrences and commercial• deposits of perli te are known throughout the world as well~exposed flows and domes of Tertiary and Quatern~ry age like most of ~he volcan…
In November 1974, on assignment of the "Directie Interna,tionale Technische Hulp11 (Ministry of Foreign Affairs) at The Hague, Dr. H. CRUIJS has joined RMRDC - Regional Mineral Resources Development Centre, recently created. by ESCAP - Economic and Social Commission for Asia and the Pacific at Bangkok. Under a bilateral arrangement between the H…
To this end an agreement was signed between the United Kingdom and the Republic of Indonesia for a five year Reconnaissance Geological and Geochemical mapping program which was carried out between 1975 and 1980 over the who Ie of Sumatra north of the Equator, an area of 190,00…
A method is developed whereby the well-top to well-bottom pressure differences in a discharging steam-well can be estimated graphically £roman output curve, provided the curve is known over the complete output range. These pressure differences can then be used, along with the equations governing transfer within the reservoir, to provide a bett…