Manusia tercipta dari tanah, hidupnya dari tanah, dan setelah mati kembali ke dalam tanah. Tanah itu sendiri adalah lapukan mineral penyusun batuan sebagai bagian utama dari benda geologi. Hewan dan tetumbuhan yang menopang kehidupan manusia juga hidup dan berkembangbiak di tanah. Manusia primitif hidupnya ditopang oleh hewan clan tetumbuhan. Mereka menggunakan peralata…
Demand for energy is expected to increase worldwide both in industrial countries and particularly in developing countries where rapid economic growth is expected, and coal therefore has crucial importance as a primary energy resources. Further utilization of coal is also part of the energy policy of japan. The use of coal in the future, therefore, will require solutions to the problems of globa…
Gunung Kelut merupakan gunungapi strato yang diklasifikasikan sebagai gunungapi aktif tipe A yang letusannya bersifat freato magmatik sampai magmatik dan selalu eksplosif. Gunung ini terletak di Kabupaten Kediri, Blitar dan Malang, Propinsi Jawa Timur. Secara geografis terletak pada 7 derajat 56 LS, dengan ketinggian puncaknya 1731 m atau sekitar 1650 meter diatas daratan Kediri.
Shortly after the promulgation of the Foreign Capital• Investment Law in 1967, the Government pursued an unconventional policy to speed up mineral exploration. International tenders were issued to develop certain areas. with tin and nickel potential, and shortly thereafter 53 blocks of mineralized areas were opened for…
In the usual geostatistical practice, global estimation of a deposits is made by running the estimated values obtained by kriging for each individual block in the deposits. When all blocks are identical in size it is equivalent to simply accepting the average of all the estimated values as the global estimated value. Variance of this estimator is expressed by a complicated formula. This explain…
The assumption of lognormal (parent) field size distributions has for a long time been applied to resources apprasisal and evaluation of exploration strategy by the petroleoum industry. However, frequency ditributions estimated with observed data and used to justify this hypotesis are conditional. Eximination of various observed field size distributions across basins and over time shows that su…
A feedback or validation procedure is an essential feature of petroleum resource evaluation methodology. The purpose of such a procedure is to provide assessors with a mechanism which enables them to validate input data and challenge geological interpretations. In our method, pool sizes can be estimated by rank from the pool size distribution and the number of pools of a play (Lee and Wang, 198…