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To: Nevada9999 who wrote (124859)7/23/2008 3:41:59 AM
From: E. Charters  Respond to of 313945
 
Aerial gravity would be dead quick but it ain't cheap.

Seismic with low priced shot equipment, not the high end deep stuff would be quick as a wink. No lines cut there yet I will bet. All you do is tow a trailer behind a swamp buggy and shoot shotgun shells onto mats on the ground. The trailer 50 feet behind does first return and you get a good map to say 800 feet. Since you had DDH info on the seds, the beds show up good by correlation. I don't know the difference between oncons seds and coal but it goes by density. Higher densities have closer spaced lines. If the coal is massive with few partings, I suspect the lines will be fairly evenly and widely spaced compared to seds/coal mixes. I suspect too that the mudstone will be closely spaced compared to the coal, with a sharp boundary.

If they are going to drill this winter, they will probably do seismic.

SGH or soil gas hydrocarbon is a new geochem. They say coal will not respond well to geochem but MMI and SGH have better penetration than average dirt bagging. They should give it a try. On the other hand if it a large coal field with variable thicknesses I am not sure what they will really learn from the anomalies beforehand. It isn't like a point target. Variabilities in signatures could come from many sources other than target richness.

Lakes with seds often show up as lows. (But not always.) My thinking is the more coal the lower the mag. Depends on what is beneath it. True that seds above could throw the results. Mag concentrates in valleys and streams etc..

EC<:-}