WORLD PLACER JOURNAL - Volume 7

Volume 7 : May 2007 SPECIAL TOPIC - An update on the gold rush in Mongolia. Originally poverty-driven but now shifting locally to wealth-driven as the illegal miners start to accumulate skill, experience, capital and equipment. The miners now have thousands of drywashers and thousands of metal detectors, and have spread throughout the Gobi desert. Mercury usage has spread with hardrock ore milling, and cyanide leaching is now common.
WHY THE GOLD RUSH HAPPENED, AND WILL IT HAPPEN AGAIN?		Robin Grayson Anatomy of the People’s Gold Rush in modern Mongolia. World Placer Journal 2007, volume 7, pages 1-66.
SPECIAL TOPIC - 75 ways to recover fine gold. An in-depth review of devices used to recover gold, particularly fine gold. A study of many hundreds of patents and devices, some new many long-forgotten, suggests that cheap home-made gravitational devices can now defeat mercury and some even challenge cyanide leaching of extremely fine gold.
75 WAYS TO RECOVER FINE GOLD - NO NEED FOR MERCURY OR EVEN CYANIDE!		Robin Grayson Fine gold recovery - 75 alternatives to mercury and cyanide. World Placer Journal 2007, volume 7, pages 67-162.