RYMARY TIN & TUNGSTEN MINERALIZATION IN N. SUMATERA.

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RYMARY TIN & TUNGSTEN MINERALIZATION IN N. SUMATERA.

H. HAMIDSYAH - Nama Orang; M. C. G. CLARKE - Nama Orang;

Geochemical sampling of the area between Lake Toba and Rantauprapat carried out by Geochemistry Division Teams in 1979 showed highly anomalous tin and tungsten in some streams. Consideration of the limited amount of data available in 1980 led to the conclusion that these anomalies are associated with mineralization at the margin of the Hatapang granite. In order to test this theory geological maping of the northern part of this granite at 1:25,000 scale was carried out by a team from Geochemistry Divisions in May-July, 1981.
At the contact of the granite and the metawacke country rock swarms of quartz veins, aplite dykes and pagmatite dykes were found cutting both the country rock and the granite itself. Tin as cassiterite and tungsten as wolfram were found in some of the veins, and in arsenopyrite, chalcopyrite, muscovite, topaz, qaurtz, apatite and fluorite. These are not all present in one vein and in some cases only quartz may accompany the ore minerals.

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Pusat Sumber Daya Mineral, Batubara dan Panas Bumi - Jln. Soekarno Hatta No. 444, Bandung, Jawa Barat PMB LA 1981-2

PMB NLLA000831

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Judul Seri: -
No. Panggil: PMB LA 1981-2
Penerbit: Bandung : Direktorat Sumber Daya Mineral., 1981
Deskripsi Fisik: Cover Merah, 16 Halaman, Peta
Bahasa: English
ISBN/ISSN: -
Klasifikasi: 553.2 HAM r
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Subjek: Bukan Logam
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