Research conducted at J.J. Hanley and co-authors has provided new information about economic geology.

Economics Week | May 22, 2009 | Copyright

"Alteration veins containing Cl-poor actinolite and actinolite hornblende are a common feature throughout the Archean-aged gneisses and granitoids along the northern margin of the Sudbury Igneous Complex, Ontario, Canada. Crosscutting relations and structural measurements show that the veins postdate the Sudbury impact event but predate the emplacement of footwall-style Cu-Ni-PGE (platinum-group element) sulfide ores," scientists in Halifax, Canada report.

"The veins are four to live times more abundant in brecciated, mineralized outcrop than in unbrecciated, barren ...

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