To: geoffreycs who wrote (4297 ) 6/29/1999 9:06:00 PM From: Chuca Marsh Read Replies (1) | Respond to of 5143
In Feb 1990, Geo, you placed this Great Lakes link at that PT thread you follow out of Birch Lake in S.A. It absolutly amazes me that you can look at geology as a done deal instead of one as a growing dynamic process of combinations and now; subtractions: From: +geoffreycs Saturday, Feb 13 1999 9:54AM ET Reply # of 10 minerals.er.usgs.gov Read the link, better than the last one. Altoro might be your motive, but the causal relationship is lost. Chucka RE- THIS:<<..Sulfur from surrounding rocks may be incorporated into the magma. This contamination reduces the ability of the magma to keep sulfur in solution (3), and the magma may become sulfur saturated. When sulfur saturation occurs, droplets of sulfide liquid form; because the droplets are more dense than basaltic magma, they tend to settle into the lower part of the magma chamber (4). As the sulfide droplets segregate, they scavenge metals such as nickel, copper, platinum (Pt), and palladium (Pd) from the magma. If these sulfide droplets become sufficiently concentrated, a magmatic sulfide deposit is formed. The largest concentrations of sulfides appear to form in channels or conduits through which new magma flows into the magma chamber. Basaltic lavas (5) erupted from chambers undergoing sulfide segregation will be depleted in those elements enriched in the sulfide deposits. Recognition of such depleted basalts can therefore provide important evidence that sulfide separation has occurred at depth. ...>> PS- Go MGAU submarine, and Team ...full steam ahead, fire another warrant at the Barge of Lake Superior lead by that Captian, Inferiorserious. Chuckarockwater-geologyGUY/Edu.html:wardsci.com