Iron pyrites sentence example

iron pyrites
  • Iron-pyrites come almost entirely from Department.

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  • The table below gives the average production of zinc, argentiferous lead, iron-pyrites and other ores during the quinquennial period 1901f 905.

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  • The conglomerate bands and quartzites contain large quantities of iron pyrites deposited subsequent to their formation, that in the conglomerates containing the gold.

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  • The difficulty in separating zinc blende from iron pyrites is well known, and probably the most elaborate ore-dressing works ever built have been designed with this end in view.

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  • Lebanon has thick deposits of lignite coal, but of inferior quality owing to the presence of iron pyrites.

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  • By the operation of meteoric agencies, iron pyrites readily pass into limonite often with retention of external form; and the masses of "gozzan" or "gossan" on the outcrop of certain mineral-veins consist of rusty iron ore formed in this way, and associated with cellular quartz.

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  • Iron-pyrites was formerly called marcasite, a word variously written marcasin, marchasite, marchesite, marquesite, &c. The two names are now applied to distinct mineral species.

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  • From copper-pyrites (chalcopyrite) iron-pyrites is distinguished by its superior hardness and by its paler colour.

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  • The world's annual production of iron-pyrites is about 1,700,000 tons.

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  • Analyses usually, however, show the presence of more iron, owing to the intimate admixture of iron-pyrites.

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  • It occurs in metalliferous veins, often in association with iron-pyrites, chalybite, blende, &c., and in Cornwall and Devon, where it is abundant, with cassiterite.

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  • The ore is a compact iron pyrites containing copper 2.5%, silver 3.83 oz., gold 0.139 oz.

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  • Calcination is only advisable for ores which contain relatively much iron pyrites and little copper pyrites.

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  • Minerals which were not mined commercially in 1902 include asbestos, which occurs in Spartanburg and Pickens counties; fullers'-earth; graphite in Spartanburg and Greenville counties; iron ores in the north and north-west portions of the state; iron pyrites in Spartanburg and York counties; talc, bismuth, ochre, pyrites, ' galena, brown coal, malachite, phosphate of lead and barytes.

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  • Arsenic is a constituent of the minerals arsenical iron, arsenical pyrites or mispickel, tin-white cobalt or smaltite, arsenical nickel, realgar, orpiment, pharmacolite and cobalt bloom, whilst it is also met with in small quantities in nearly all specimens of iron pyrites.

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  • The walls are of mixed local stone and much of it is Easdale slate containing iron pyrites.

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  • Sound Of Music 7 How is iron pyrites more commonly known?

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  • We also found some iron pyrites associated with mica schist 's, the crystals were moderately good.

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  • It consists, indeed, mainly of iron-pyrites, with a notable but variable proportion of copper, sometimes with silver and gold, and not infrequently associated with lead and zinc sulphides.

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