Clays are earthy, fine grained rocks composed mainly of minerals of secondary origin - the clay minerals - among which the most predominant are the hy• drous aluminum silicates. The clay minerals, formed by the chemical weathering or alteration of aluminous minerals such as feldspar and mica, are…
epheline syenite is a white to whitish-grey, medium• grained igneous rock resembling granite in texture. It consists of nepheline, potash and soda feldspar. and accessory mafic minerals such as biotite, hornblende and magnetite. Although nepheline syenite is a rock type known to occur in many parts of Canada, its industrial application is li…
Gypsum is a hydrous calciu~ sulphate (CaS04.2HiO), which, when calcined at temperatures ranging from 250° to 400°F, releases three quarters of its chemically • combined water. The resulting hemihydrate of calcium sulphate, commonly referred to as plaster of paris, when mixed with water, can be mo…
Pemerintah Indonesia mengliadapi beberapa pilihan dalam menentukan strateg:i pembangunan .. Pemilihan diantara beberapa alterna•cip Eenghada:pi benyak kesuli tan. -~tara .lain -disebabkan oleh kenyabean bahwa Indonesia masih menghadapd, beber apa duald sme, yaitu berdsmp'ingannya bebe…
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Deskripsi Fisik
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The mineral sector is a major source of Indonesia's non-oil/gas exports. Although the sale of ore and ore concentrates contributed only 3.6 percent
to total Indonesian foreign exchange earnings in 1984, the dollar value of…
U.S. Geological Survey analysts have made more than 4fi,OUO determinations on six geochemical exploration reference samples for the purpose of furnishing data on the homogeneity of the samples. The samples are considered to bL• sufficiently uniform to be use f'…
Shvartsev, S.L., Udodov, P.A. and Rasskazov, N.M., 1975. Some features of the migration of microcomponents in neutral waters of the supergene zone. J. Geochem. Explor., 4:433-439.
The development of the hydrogeochemical method of prospecting in the last two decades had led to the accumulation of a large amount of factual material on the …
Pengumpulan data hasil pemboran bijih yang akann diproses oleh computer dilakukan dengan menggunakan " data form" yang disebut "geology systim". Data form tersebut telah dirancang oleh PH Blanchet dan C.I. Godwin dengan type C>W>B>G. Form 71-03 yang diberi judul "Geolog Drill Hole Geologic Log". di dalamnya dapat dibagi menjadi dua bagian yaitu 1. f…
Yang menjadi sjarat untuk batuan pospat harus mengandung satu atau lebih mineral pospat, biasanya kalsium pospat, untuk kadar yang cukup dan komposisi yang cocok untuk dipakai faedahnya dengan segera dalam pembuatan produk berharga. Seperti halnya batu pasir dan batu kapur yang mengandung mineral pospat.