The rrost fundamental revision of concepts in metallogeny over the last 30 years has been the re - interpretation of pyritic and polyrretallic• sulphide ore deposits as deposits of the syngenetic volcano - sedimentary type. One is disturbed by the proximity •sj.de by side in the same for:ma.ti• on but at different stratigraphic levels, o…
Mineral Exploration and mining activities have been undertaken in Sulawesi since the turn 19th century, but by world standartslage parts of the region remain underexplored. Todate only two commodities have been mined on a significan scale, viz. Gold with a total production of about 90 t (excluding artisanal mining), and nickel totaling about 4.8 Mt…
Daerah Selogiri, yang terletak di Kabupaten Wonogiri, Jawa Tengah, adalah salah satu dari beberapa daerah pencarian emas di Daerah selatan Pegunungan di Jawa, Indonesia. Tiga jenis batuan intrusi dioritik-andesitik terjadi di daerah Selogiri, yaitu, porfiri andesit hornblende, porfirior hornblende diorite dan hornblende diorite, terekspos dalam depr…