cassiterite

(redirected from Tin ore)
Also found in: Dictionary, Thesaurus.

cassiterite

(kəsĭt`ərīt), heavy, brown-to-black mineral, tin oxide, SnO2, crystallizing in the tetragonal system. It is found as short prismatic crystals and as irregular masses, usually in veins and replacement deposits associated with granites. Since it is hard, heavy, and resistant to weathering, it often concentrates in alluvial deposits derived from cassiterite-bearing rocks. It is the principal ore of tin and is mined in many countries; the most important sources are Malaysia, Thailand, China, Indonesia, Bolivia, and Russia. Except for Bolivia, nearly all of this production is from alluvial deposits.

Cassiterite

 

(or tinstone), a mineral with the chemical composition Sno2. Theoretically it contains 78.62 percent Sn but usually includes impurities of Nb, Ta, Zr, Sc, W, and Fe; thus, the Sn content varies within 68–78 percent.

Cassiterite crystallizes in the tetragonal system, forming prismatic or dipyrimidal crystals. Geniculated twins are characteristic. The crystalline structure is analogous to that of rutile. Cassiterite is usually encountered in the form of small and large crystals, drusoid aggregates, or compact granular masses as well as in the form of cryptocrystalline, colloform segregations, concretions, and sinter formations. The color is dark brown, almost black, yellow with a reddish brown cast; nearly colorless varieties are also known. Cassiterite has an adamantine luster, a hardness of 6–7 on the mineralogical scale, and a density of 6, 040–7, 120 kg/m3 (lowest in light-colored cassiterite).

The deposits are usually genetically linked with granitic rocks. The most interesting commercial accumulations of the mineral are characteristic for hydrothermal quartz-cassiterite and sulfide-cassiterite veins. Cassiterite is stable in zones of oxidation and surface weathering; with the destruction of primary deposits, it accumulates in placers. In the USSR, cassiterite deposits are found in the northeast in Primor’e, in Middle Asia, and in the Kazakh SSR. Abroad, it is found in Malaysia, Thailand, Indonesia, the People’s Republic of China, Bolivia, Nigeria, and elsewhere. Cassiterite is the chief ore for obtaining tin.

A. B. PAVLOVSKII

cassiterite

[kə′sid·ə‚rīt]
(mineralogy)
SnO2 A yellow, black, or brown mineral that crystallizes in the tetragonal system in prisms terminated by dipyramids; the most important ore of tin. Also known as tin stone.
References in periodicals archive ?
The small miners apart from selling their tin ore to PT Timah, also exported to Malaysia, Singapore or Thailand, with low prices.
Considering the benefits between domestic tin ore mining & dressing industry and tin smelting industry in 2010, the upstream tin ore mining & dressing industry has higher profitability than the downstream tin smelting industry.
The majority of tin ore sources throughout Eurasia are concentrated in a narrow geological belt stretching from Europe to Southeast Asia, making them not only relatively scarce, but perhaps also facilitating the adoption of bronze throughout the Eurasian landmass via the steppes of Central Asia (Pigott & Ciarla 2007).
Spurred by Governmental efforts to encourage mining development, it has acquired concessions containing vast potential reserves of Zinc, Tin Ore, Lead, Copper, Feldspar, Quartz, Kaolin and Mica.
Sembiring, Geology and Mineral Resource Director General, said the additional capacity is needed to process tin ore produced in Bangka.
The report covers key data on global and China tin supply and demand, the country's tin ore mining and dressing and smelting industry including tin import and price O http://marketpublishers.
Illegal miners were allowed by the regional administration of Bangka and Belitung to export tin ore causing oversupply in international market.
In 2009, the output of tin ore in China realized 115,000 tons, accounting for 37% of the global total, while China's output of refined tin was 141,500 tons, up 8.
Jackson (1991) proposed that tin ore occurred in 'quite substantial quantities' and that cassiterite was probably present in the oxidized secondary enrichment zones at Avoca, 7 km northeast of the Gold Mines River (Jackson 1991).
Output of tin ore concentrate in Hunan, Guangxi and Yunnan, 2000-2006
NYSE:SSC) announced today that the initial results of its drilling and sampling program at the newly acquired Pirquitas property in northwest Argentina is confirming evidence of a large disseminated of silver and tin ore body, that could be developed by standard low-cost open pit techniques.
This study found that a mine with an operating capacity for 2,000 tonnes per day treating 6,800,000 tonnes of tin ore over a 10 year mine life would generate a net pre-tax cash flow of about $112,500,000 after recapture of the initial cash investment of $46,500,000.