A generalized classification of some tungsten deposits and their relation to 's' and 'i', ilmenite and magnetite granite types

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A generalized classification of some tungsten deposits and their relation to 's' and 'i', ilmenite and magnetite granite types

M.C.G. Clarke - Nama Orang;

In recent years two new classifications of Cale Alkalie granitoids have evolved in the eastern hemisphere and are currently influencing exploration concepts, particularly in SE Asia. This note arises from considerations of their possible appliction to the further exploration of the pre-Quaternary part of Sumatra for which a Regional Geolog~cal and Geochemical reconnaissance has just been completed (Page et al 1978, 1979, Cameron at al 1980, Page & Young, 1981). The prospective elements include tungsten, a valuable and strategic metal, which up to the present has been only found associated with tin in Indonesia The -rrew Granitoid classifications which are based on different paramaters are a) the "I" & "S" type scheme of Chappell and•White (1974) ~nd White & Chappell ('1977) and b) the "Magnetite" and "Ilmenite" series scheme• of Ishihara (1977). No attempt is made here to describe or contrast the two schemes. They have been very well reviewed by Takahashi•• Aramaki and Ishihara (1980) who point out that the two schemes do not correspond exactly but that all Magnetite 3eries granitoids are equivalent to 'I' types a!ld Ilmenite series granito ids include both "S" & "I"- types. Nevertheless for the purposes of this note the two schemes are regarded is being very similar and the pairs of contrasted rock types of each scheme as "end members" of more or less continuous series.

Ketersediaan

Pusat Sumber Daya Mineral, Batubara dan Panas Bumi - Jln. Soekarno Hatta No. 444, Bandung, Jawa Barat PMB LU 1981 - 12

PMB LU198112

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Informasi Detail

Judul Seri: -
No. Panggil: PMB LU 1981 - 12
Penerbit: Bandung : INSTITUTE OF GEOLOGICAL SCIENCES GEOPHYSICAL DIVISION., 1981
Deskripsi Fisik: 6 p. : 21 cm
Bahasa: Indonesia
ISBN/ISSN: -
Klasifikasi: 553.2 RKE a
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: Exploration
Geochemical
Granite
Granitoids
Alkali
Info Detail Spesifik: -
Pernyataan Tanggungjawab: M.C.G. Clarke

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