GREY:BNCIF - Post by User
Post by
bossmanon Jun 02, 2014 8:32pm
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Post# 22623051
Mexico
MexicoMexicoLarge deposits of bedded graphite associated with metamorphosed Triassic sandstone are found near the town of La Colarada, in the State of Sonora. Graphite has been mined in this country since 1895. The Triassic beds have been sharply folded and intruded by granite and dykes. Seven graphite beds of varying thickness, on an average 2 to 3 metres have been found. Mexico is one of the important producers of amorphous graphite, which is mined here by underground methods. The run-of-mine contains 80-85% carbon which on hand-sorting gives 95% carbon. A major portion of the production is exported to the USA.