Several recent observations of low-energy protons in the in• terplanetary medium following solar particle events have con• clusively demonstrated that their differential energy spectra can significantly deviate from a power law form (see, for exam• ple. l.anzerotti (…
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…
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…
Logam nikel merupakan salah satu lo~am yang mempunyai daya tahan terhadap korosi dan panas, serta telah sejak lama digunakan oleh manusia baik untuk keperluan alat rumah tiniga, sektor konstruksi maupun industri. Di alam nikel terdapat dalam dua jenis/bentuk, yaitu nikel sulfida dah nikel silikat atau nikel oksida, sedangkan min…
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80 halaman, tidak berwarna, cover hijau muda, lamp
ZeoIit alam meruoek sn senyawa e l um t no=e i I i ket: t.erh i aree i yang secara fisik dan kimia mempunyai kemampuan sebagai bahan penyerap reasoroe i ) , oenuk er ket ion , dan katalis.
Di Indonesia, zeo1it termasuk salah satu bahan galian yang baru diusahak.an den dimanfaatkan. o leh kerene …
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Deskripsi Fisik
51 Halaman, lampira tabel, lampiran gambar, isi ti