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To: Proud Deplorable who wrote (7212)6/21/2006 10:30:28 PM
From: LoneClone  Read Replies (1) | Respond to of 19697
 
R-E, thanks for those links.

One of these times I'm going to have to drop in on Mt. Lassen instead of just driving on by.

LC



To: Proud Deplorable who wrote (7212)6/21/2006 11:00:13 PM
From: sageyrain  Respond to of 19697
 
Thanks for the links.

Don't know if you knew this, not that it means a damn thing, but Terry Leach was a defense witness at Felderhofs insider trading trial last Fall.

Yes, I knew this.

The Lassen link has a very nice schematic section of a hot-springs and epithermal environment. Most or all of the boiling takes place below the surface. The apparent boiling of the hot springs, and mud pots at the surface is due to gases bubbling up, given off by the boiling fluids below. The area at the surface above the FDN zone, when it was forming, may have looked quite similar to the Lassen volcanic area. Surface hot springs deposits (quartz rich sinter, explosion breccia, silicified sediments, etc.) more often than not are barren of or only weakly anomalous in gold, and often enriched in elements such as mercury, arsenic and antimony.

The Aurelian sections at FDN show hot spring sinter at what probably was the ground surface at the time of the gold deposit formation, and as 3bar explained, was later faulted down and covered over by gravel deposits.