Geology, the science of the earth is a fascinating branch of study in Natural Science. It is fascinating because it explains to us the development of topographical scenery on the surface of the land such as the high mountains (the Himalayas, the Alps etc.,) vast plains, volcanoes, waterfalls, grand canyons and coral …
Fosfat adalah batuan dengan kandung fosfor yang ekonomis. Biasanya kandungan fosfor dinyatakan sebagai bone phophate of lime (BPL) atau triphosphate of lime (TPL), atau berdasarkan kandungan P2O5.Mula jadi batuan fosfat dapat dibedakan menjadi tiga tipe yaitu fosfat batuan beku-apatit (igneous phosphate), sedimen (fosfat marin), dan guano.
The volcanism of the Canary Islands has been the subject of many research projects, scientific publications and Doctoral Theses. However, not very much has been done to spread basic knowlege of this thrilling study among those who are not specialists. The reasons which move us, to try to fill in this cu…
Pada awalnya manusia cenderung mengidentifikasikan sumber daya dengan substansi tertentu, benda yang nyata dapat dipegang. Memang suatu substansi dapat berfungsi sebagai sumber daya, clan pada dasarnya benda memang mempunyai peranan besar dalam pengertian sumber daya, misalnya bahan bakar seperti batu b…
Geoscience has a vital role to play in underpinning the social, economic and indus• trial infrastructure of nations, now and as we move into the 21st century. If we are to have the mineral and energy resources to sustain a global population of 10 billion or more; if we are to manage the fragile environment we cohabit, mitigate against the…
Pada tahun 1921 Negara Federasi Malaya (kini Malaysia) dan Hindia Belanda (kini Indonesia) mengada• kan Perjanjian Timah bilateral yang pertama, dikenal sebaqai Bandung P~, yang berlaku tiga tahun. Kedua negara pada waktu itu memproduksi 17.000 It. atau separoh dari pada produksi timah dunia.…
The machines are equipped to run at U.K. mains voltage and frequency, ie 240v 50Hz, and consume 146VA power at full load. Computers are sensitive to voltage fluctuations, and '.even more so to sudden voltage failures. It is usually prudent to install some form of protection device between the mains and the computer. Mains-born interference can take …
This report focuses much on regional geochemistry as a system for mapping of the secondary environment. The reasons for this are that geochemistry has during the past decade found applications far beyond the traditional ones in the search for mineral commodities. The fields that applied-- geochemistry currently finds applications to are primarily:
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Pada tahun 1983, Pusat Pengembangan Teknologi Mineral c.q. Proyek Pe• ngembangan Pusat lnformasi Mineral telah mengadakan survel data penye• diaan kaolin di seluruh Indonesia untuk yang kedua kalinya. Survei yang pertama dilakukan pada tahun ]982.
Survei yang dilaksanakan pada tahun 1983 ini l~bth dititlk-beratkan ke• pa…
Nonnally oil or gas occupy only a small fraction of the total pore -1. volume in the subsut!l:-ece; the rest of the spJlce contains water_.Sometimes the water associated with the oil is fresh, but usually it is salty. In general, the deeper and older a rock is, the saltier the water it contains. Thr origin of oil-field brines is not well understoo…