Rubidiun-strontiuo and potassium-argon age dating of the granitic rocks' of the Malny.n Peninsula show that important episodes of granites .to intrusion occurreddurine late Carboniferous (about 280 m.y), late Permian/early Triassic (abort 25…
The volume of petroleum exploration activities in Indonesia has increased considerably in the past. seven years. hior to 1966 exploration activities were oarried out mainly by the State Oil and Gas Entreprises and the Contract of Workcontractors, and their activities were co…
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Deskripsi Fisik
13 halaman, tidak berwarna, tidak bergambar, cover
Penyelidikan mineral logam, terutama logam dasar, pada tahun-tahun yang lalu (dalam Pelita I) terutama dikhususkan pada blok-blok di Sumatera Selatan, Jawa Barat, Kalimantan Barat dan Sulawesi Selatan atas dasar SK Menteri Pertambangan tanggal 3 Agustus dan 1 September 1973. Sejak Pelita II, yang dimulai pada bulan April 1974, secara otomatis konses…
Fluorit dikenal dalam dunia perdagangan den9an nama Flourspar dengan rumus kimia CaF2• Produksinya berkembang sejak tahun 1889, merupakan mineral komersil karcna kegunaannya dalam industri baja, untuk membuat hidrofi~rida ,industri gelas!dan email. Secara petrologi fluorit mempunyai sistirn kristal isometrik, berkilap kaca berwarna bening, p…
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Deskripsi Fisik
20 halaman , tidak berwarna, tidak bergambar , cov
• Abstract-Chemical and isotopic analyses of water from drill holes and mines throughout the Fennoscandian Shield show that distinct layers of groundwater are present. An upper layer of fresh groundwater is underlain by several sharply differentiated saline layers. which may differ in salinity, relative abundance of solutes…
To illustrate. the techniques involved and prov1oe a background for those not familiar with Eh and Ph, we might first very briefly define the terms, describe their measurement and indicate the method of Eh-pH diagram construction. Eh The oxidation potential of an aqueous system is determined experimentally by measuring the voltage between a…
Experiment, with a small spouted-bed reactor have shown that fluidized-bed reduction of New Zealand titaniferous ironsands with hydrogen, and with carbon monoxide• containing 50'c hydrogen, can be conducted without sticking, in the temperature ranges 700°-900°c. At 900°c reduction proce…
Residual soil is one of most widely employed sampling materials for tracing geochemical anomalies in geochemical exploration. Systematic studies on the phenomenon of the formation of geochemical anomalies in residual soils are being carried out by the Geolo…
Daerah Pengawasan meliputi Kotif Bontang da.n Sanzata yang merupakan bag ian dari l{a.bupa.ten Kutai serta Kotarnadya Samarinda, Propinsi Kalimantan Timur. Jumlah Sum.ur bor yang diawasi adalah 59 sum.ur bor den,gan kondisi sebanyak 20 buah sumurproduksi yang mana dari jumlah ini terdiri dari 3 buah sumur bor mempumyai izin 114 buah s…