In order to delineate areas of prospective for REE mineralizations in Indonesia, the geological setting of the parts of Indonesia were checked agains the REE mineralization models explained above, taking into consideration the results of former prospecting and explorations.The main prospective areas of Indonesia are those which on one hand conatin granitoid instrusions and on the other hand con…
Calcium carbonate deposit or limestone is a carbonate rock consisted predominantly of calcite and or aragonite minerals. Both of minerals have the same chemical composition but different in their crystallographic systems. Aragonlte occurs mostly as constituents of mod ern carbonate rocks, e.g. beachrock, reefrock and marine bioskeletals, as well as ancient calcium carbonate rocks or li…
Lokasi singkapan WR-2 terletak di hulu anak sungai yang diperkirakan bermuara ke Sungai Klabau. Lokasi tersebut dapat dicapai melalui jalan pemboran minyak yang dibuat oleh Pertamina, Asamera dan jalan desa dari Desa Bejubang menuju Dusun Pulau Alang (?) ke a rah selatan sejauh 6 km, dilanjutkan melalui jalan setapak sejauh kurang lebih 1,5 km. Kendaraan …
Eastern view of Unzen Volcano in the Shimabara Peninsula, Kyushu, SW Japan. New lava domes with the thick apron of volcanic debris have formed near the summit of Mt. Fugen (1.359 m) since 20 May 1991. Rockfalls from the fronts of domes descended as pyroclastic flows along the Mizunashi River (straight toward readers) and Oshigadani Valley (curved in the clockwise direction).
Pulau Krakatau dinamakan orang juga Pulau Rakata. Penduduk Banten dan suku Sunda, terutama suku Sunda yang berdiam di wilayah Jawa Barat bagian barat, lebih banyak mempergunakan nama Rakata, namun suku-suku bangsa Indonesia lainnya lebih banyak mempergunakan nama Krakatau. Dalam “Encyclopedie” van Nederlandsch Indie” juga dikatakan, bahwa Pulau Krakatau disebut orang juga Pulau Rakata.
The change of seasons is most clearly distinguishable in the appearances of mountains. Councurrently with snow-melting, the yellowish green colored sprouts of plants attract our attention and tell us the advent of spring on mountains. And when the leaves change their colour from fresh green to dark green, we are informed that the rainy seasons is over and the summer is setting in.
Bahan galian industri adalah mineral industri dan batuan, yaitu semua bahan galian di luar mineral logam dan radioaktif yang mempunyai kegunaan langsung untuk berbagai industri. Menurut undang-undang dan peraturan yang berlaku ten tang penggolongan bahan galian (PP No. 27/1980), maka sebagian besar bahan galian industri termasuk bahan galian Golongan C. Secara geologi bahan g…
Geodynamics, the study of global movements and of the forces driving them, is a rekatively fresh offshoot from the vigorously branching tree of the earth sciences. Before the advent of Alfred Wegener on this scene in the early nineteen-hundreds, the idea of permanency in the distribution of continents and oceans was almost sacrosanct.
Das Antlitz der Erde, or “The Face of the Earth”, was the title of the first great magnum opus on the gross surface features of the earth by Eduard Suess late last century. A recent British television documentary with the same purpose bore the same title.
Batumulia dapat digolongkan dalam tiga bagian yakni; jenis batu permata (precious stones), setengah batu permata (semi precious stones ), dan jenis batu hias ( ornamental stones). Batumulia jenis batu permata adalah mineral yang mempunyai daya tarik yang terdapat di alam dan setelah dilakukan pemrosesan maka keindahannya semakin bertambah dari bentuk asalnya.Pada umumnya jenis batu permata …