Geology and Resources of ·vanadium
Geology and Resources of ·vanadium
Geology and Resources of ·vanadium
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VI BIBLIOGRAPHY OF VANADIUM GEOLOGY<br />
0.2 percent V205 ; <strong>and</strong> some chromite deposits contain about 0.1<br />
percent V20 5 •<br />
Most ore deposits <strong>of</strong> hypogene hydrothermal origin contain only<br />
sparse amounts <strong>of</strong> vanadium; indeed, many hypogene ores contain<br />
less vanadium than the average crustal abundance. On the other<br />
h<strong>and</strong>, vanadium does accumulate in some gold-bearing veins, especiaJly<br />
those containing gold tellurides, <strong>and</strong> in some titanium-bearing<br />
veins a few tenths <strong>of</strong> a percent V20 5 is common.<br />
Residual deposits rich in aluminum <strong>and</strong> iron, such as bauxites <strong>and</strong><br />
laterites, commonly contain about 0.1 percent V20 5•<br />
Some sedimentary deposits are enriched syngenetically in vanadium.<br />
Many sedimentary iron ores contain about 0.1 percent V205• Some<br />
organic-rich shale contains 1 percent or more V20 5 • Some deposits <strong>of</strong><br />
phosphate rock contain a few tenths <strong>of</strong> a percent V20 5, but most<br />
phosphate deposits have a much lower vanadium content. Vanadium<br />
is commonly the principal trace element in petroleum, especially<br />
asphalt-base oils; the ash <strong>of</strong> some crude oils contains more than 10<br />
percent V20 5 , as does the ash <strong>of</strong> some natura) asphaltites <strong>and</strong> refinery<br />
residues derived from oils <strong>of</strong> this type. Coal, on the other h<strong>and</strong>, is<br />
usually low in vanadium.<br />
Four geologic types <strong>of</strong> productive vanadium deposits are <strong>of</strong> epigenetic<br />
origin, but the source <strong>of</strong> vanadium <strong>and</strong> its manner <strong>of</strong> emplacement<br />
in these deposits are uncertain. These types are the vanadiumuranium<br />
deposits in s<strong>and</strong>stone; the somewhat similar deposits <strong>of</strong> the<br />
same metals in limestone; the deposits <strong>of</strong> base-metal vanadate minerals<br />
in the oxidized zones <strong>of</strong> copper, lead, <strong>and</strong> zinc deposits; <strong>and</strong> a recently<br />
discovered deposit in the zone <strong>of</strong> alteration at the contact <strong>of</strong> an<br />
alkalic intrusion. The vanadium content <strong>of</strong> ores from these deposits<br />
ranges from 1 to 2 percent V20 5 •<br />
BIBLIOGRAPHIC REFERENCES<br />
Each bibliographic reference is listed alphabetically under the<br />
author's last name or the last name <strong>of</strong> the first author. Each reference<br />
includes the title <strong>of</strong> the article, the publication source, <strong>and</strong> the year<br />
published. The names <strong>of</strong> most serial publications are abbreviated in<br />
the bibliographic references <strong>and</strong> are listed alphabetically, both in<br />
abbreviated form <strong>and</strong> in full, in the accompanying serial list. Titles<br />
<strong>of</strong> articles published in foreign languages using the Roman alphabet ·<br />
are given both in the original language <strong>and</strong> in English trans] ation;<br />
those using the Cyri11ic alphabet are transliterated (using the style<br />
<strong>of</strong> the U.S. Board on Geographic Names) <strong>and</strong> translated. However,<br />
only translations are given for original titles that are unusually long.<br />
For titles <strong>of</strong> articles in Oriental languages, only translations are<br />
given. Most title translations were taken from journals that regularly<br />
publish abstracts <strong>of</strong> scientific articles.