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…
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…
Petroleum exploration comprises a many-facet~d activity. It is a complex mix of science and technology, operating in a complex economic and political matrix. I will review some of the basic aspects of petroleum geology, economics and politics which in- fluence this world-wide activity. I hope that such a rev_iew may be of some value to some of you…
Whitney, Ph.R., 1975. Relationship of manganese+iron oxides and associated heavy metals to grain size in stream sediments. J. Geochem. Explor., 4: 251-263.The distribution of ammonium citrate-leachable lead, zinc and cadmium among size fractions in stream sediments is strongly influenced by the presence of hydrous Mn-Fe oxides in the …
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…
Menurut angka statistik tahun 1971 luas tanah pertanian di Indonesia ± 1,57 juta hektar atau ± 8,3% luas seluruh daratan Indonesia. Sepertiga luas tanah pertanian ini berupa tana~ pesawahan yang ditanami padi. Dari semula tanah pesawahan yang ditanami padi ini baru sepertiganya mendapaj, kan pengairan-teknik secara terus-menerus sepanjang tahu…
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…
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…
Although the Van Bemmelen (1949) Geology of Indonesia book is generally viewed as the most significant textbook on the geology of Indonesia, its tectonic interpretations are outdated (and were actually already controversial at the time of publication}.
The pioneering book and maps of Warren Hamilton (1979) 'Tectonics of th…