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Gold/Mining/Energy : Geology, mining and assorted terminology thread

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To: Leo Raftis who wrote (71)	12/28/1996 5:07:00 PM
From: Francoise Kartha	of 110

Mantos are one of the hydrothermal ore-forming systems. The term has been translated by stratum, skarn, chimney, or brecchia pipe depending on the shape and the geological context. Those formations have been first identified in Latin America, thus the Spanish term. Mantos are stratigraphically confined, hydrothermally altered ore units. Those gold host rocks occur most often between an overlying andesite or rhyolite sequence and underlying andesite sequence in close proximity to contact areas related to multiple intrusive events and volcanic stratigraphy. Both the overlying and underlying andesites are seldom mineralized in manto form but are known to host mineralization in near vertical structures or hydrothermal feeder zones. Some scientists contest the use of the term is.dal.ca Examples of such a formation: bc-mining-house.com pangea.stanford.edu rio-amarillo.com canvest.com attwoodgold.com

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