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.
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
Dengan semakin berkembangnya sektor industri di dalam negeri, seperti industri kosmetik, industri cat, dan industri keramik, maka secara tidak langsung menunjukkan bahwa kebutuhan terhadap komoditas mineral talk ikut meningkat, baik sebagai bahan baku utama maupun penolong.
Walaupun data cadangan talk secara kuantitatif …
Dalam rangka proyek PELITA III tahun anggaran 1979-1980 Sub Direktorat Geofisika Eksplorasi mengadakan penyelidikan geofisika terpadu untuk endapan sulfida di daerah Masurung di hulu sungai keputusan, P. Bacan, kabupaten maluku utara. Penyelidikan geofisika ini merupakan tindak lanjut dari penyelidikan terdahulu yaitu penyelidikan geokimia dan geolo…