Re: [meteorite-list] Meteorites Delivered Earth's Gold

2011-09-12 Thread Chris Spratt
There was a story going around the turn of the last century that some placer miners (oldtimers) used to leave some small gold nuggets in situ in a fast moving stream so the nuggets would grow larger. Chris. Spratt Victoria, BC __ Visit the Archives

Re: [meteorite-list] Meteorites Delivered Earth's Gold

2011-09-12 Thread GeoZay
There was a story going around the turn of the last century that some placer miners (oldtimers) used to leave some small gold nuggets in situ in a fast moving stream so the nuggets would grow larger. There must have been some mighty dumb miners where you lived. The one's I hung out with

Re: [meteorite-list] Meteorites delivered Earth's gold

2011-09-11 Thread Chris Peterson
Quartz formed in the Earth's crust, and stayed there. It is light (compared with gold) and doesn't have an affinity for iron. Indeed, it continues to form, given the abundance of silicon and oxygen in the crust and mantle. In bulk, there is no more gold in meteorites than in the Earth. The

Re: [meteorite-list] Meteorites delivered Earth's gold

2011-09-11 Thread Eric Wichman
Quartz forms on Earth. On 9/10/2011 2:36 PM, cdtuc...@cox.net wrote: Paul, List, It seems to me that much of the Gold found on Earth is accompanied by Quartz. In fact most of the finest Non-nugget specimens are usually found in quartz. That said; If this gold came from space then where did

Re: [meteorite-list] Meteorites delivered Earth's gold

2011-09-11 Thread Mark Bowling
@meteoritecentral.com; Paul H. oxytropidoce...@cox.net Sent: Saturday, September 10, 2011 2:36 PM Subject: Re: [meteorite-list] Meteorites delivered Earth's gold Paul, List, It seems to me that much of the Gold found on Earth is accompanied by Quartz.  In fact most of the finest Non-nugget specimens are usually

[meteorite-list] Meteorites delivered Earth's gold - Then plate tectonics concnetrated it

2011-09-11 Thread Paul H.
In [meteorite-list] Meteorites delivered Earth's gold at: http://six.pairlist.net/pipermail/meteorite-list/2011-September/079706.html Carl Asked, It seems to me that much of the Gold found on Earth is accompanied by Quartz. In fact most of the finest Non-nugget specimens are usually found

Re: [meteorite-list] Meteorites delivered Earth's gold

2011-09-11 Thread John Hendry
Carl, The earth's crust is under a continuous process of differentiation by various processes. By differentiation I mean the separation and concentration of the various elements. There are probably a multitude of mechanisms that allow concentration of specific elements, and all three rock types

Re: [meteorite-list] Meteorites Delivered Earth's Gold

2011-09-11 Thread Chauncey Walden
John Hendry gave us a good description of gold forming processes but there is another method. This is the direct deposition of gold that has been dissolved by biologic processes and not necessarily at higher than surface temperatures. Here's one article:

[meteorite-list] Meteorites delivered Earth's gold

2011-09-10 Thread Paul H.
Young Earth was sprinkled with precious metals physicsworld.com, Sept. 7, 2011‎ http://physicsworld.com/cws/article/news/47116 Where does all the gold come from? University of Bristol, ‎Sept 7, 2011‎ http://www.bristol.ac.uk/news/2011/7885.html Meteorites delivered Earth's gold, by Leila

Re: [meteorite-list] Meteorites delivered Earth's gold

2011-09-10 Thread cdtucson
Paul, List, It seems to me that much of the Gold found on Earth is accompanied by Quartz. In fact most of the finest Non-nugget specimens are usually found in quartz. That said; If this gold came from space then where did the quartz come from and for that matter why is gold not found buried in