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Gold/Mining/Energy : Maxam Gold Corp. OBB:MXAM -- Ignore unavailable to you. Want to Upgrade?

To: Alan Vennix who wrote (8144)	5/4/1999 7:18:00 PM
From: Chuca Marsh	Read Replies (1) \| Respond to of 11603

I found an interesting Model in a textbook that mentions the Southwest Desert Areas ( Yes, Buds- I am talking Maxam Gold and Palladium Company here!) with the salts and the precip that is mentioned up north: ( in a different PGM Model) A mature soil profile has several recognizable soil honizons, ions. layers roughly parallel with the wish the ground surface that are products of soil-forming processes (® Fig # 6.9)< not shown>. The uppermost soil horizon the "A" horizon , is the zone of leaching. Here, mineral matter is most strongly is dissolved by downward-percolating of water. It may be capped by a a zone by organic matter <humus> of variable thickness called the "O" horizon which provides CO2, and organic compounds that make the percolating water slightly acidic. As the dissolved chemicals move downward, some of them are redeposited as new minerals and compounds in the the "B" horizon called the zone of ACCUMULATION. This horizon is usually lighter in color and harder than the "A" horizon. Below this the "C" horizon. the weathered transition zone that grades downward into fresh parent materal. The thickness and development of tile Soil profile are profoundly influenced by climate and time. In desert regions, of the Southwest, the "A" horizon may be thin or nonexistent, and the "B" horizons may be firmly cemented by white. crusty calcium carbonate known as as CALICHE. Caliche forms when downward-percolating water evaporates arid deposits calicum carbonate that has been leached from above. Also, if the water table is is close to the ground surface, upward-moving waters may evaporate into the layers , leaving deposits of deposits of caliche. Some of these deposits are so thick and hard that unusual measures are required to till or excavate through them. RESIDUAL SOILS- I stop HERE!!! !( But...till and stop...hummne- like a cap of Limestone...dolomite is a form a Calcite like we have in AZ...and the capping of a OIL SANDS layer...up North is like our Caliche Caps! Hummn!) Chuca P.S.- This company's website got re vamped today, birchmountain.com birchmountain.com ABOVE ARE NEW, BELOW is the Old Prairie Gold Model: birchmountain.com The New are ON the Disk...since I saw 40 NEW PICTURES on the disk...look around as more than these two are on this COMPLETELY RE VAMPED WEBSITE! birchmountain.com and so... so I went to my Text Book mentioned so many times by Bernard W Pipkin and D D Trent - Geology and the Environment- sec ed Pg 158 RE this precip model ...could it be similar in the desert with our salts encapsulating these golds...as it is a thousand of miles north with the Limestones and Salton/Brine Leach Pads/pods/ponds ? Hummne. Mayb. SO I quote BMD: <<..This stylized cross section illustrates the Prairie Gold process under the Alberta Oilsands, north of Fort McMurray. In conjunction with the Geological Survey of Canada, Birch Mountain has developed the Prairie Gold model for deposition of gold and precious metals in sedimentary rocks. The Prairie Gold model guides our search for a gold deposit in this area. It explains how gold and other metals were transported by low-temperature fluids in the Western Canadian Sedimentary Basin (WCSB) and were deposited in host rocks in Athabasca. There are five critical elements of the Prairie Gold model: a brine solution; source rocks; a plumbing system; a precipitation mechanism; and time. All elements of the Prairie Gold model are present in Athabasca. The solution capable of carrying gold is an oxidized chloride-rich brine generated as the residual saline solution remaining after salt deposition during Early and Middle Devonian times. In addition, chloride-rich brine is generated when meteoric water enters from the surface, flows through the sedimentary rock and dissolves the deposits of salt. The source rocks must contain some gold and precious metals and be sufficiently porous and permeable to allow the brine to circulate. In Athabasca, the source rocks are fractured Precambrian basement which extend along the eastern margin of the WCSB. The plumbing system by which the metal-bearing solutions flow to the site of deposition is a combination of structural and stratigraphic fluid conduits including permeable aquifers, faults, fractures and solution collapse features. The structural history of the eastern part of the Peace River Arch is an integral part of the Prairie Gold model in Athabasca. Over geological time, structural adjustment of the Peace River Arch fractured the sedimentary rocks and provided conduits for transporting metal-bearing solutions. The precipitation mechanism for removing gold and precious metal from solution is reduction of the oxidized, chloride-rich brine by reaction with either sulphides or organic material. It takes time for these solutions to transport a sufficient quantity of gold. In northeastern Alberta, gold and precious metal transport and deposition has occurred for tens to hundreds of millions of years. Applying the Prairie Gold model, we believe an ore body in Athabasca will be discovered in a large volume of fractured, altered limestone that contains gold and precious metals with minor amounts of copper, zinc and other metals. The location of such an ore body will be controlled by stratigraphic features and will reflect the distribution of both permeability and precipitation mechanisms, likely related to solution collapse features. The Bitumount Basin meets this description and will be the focus of our exploration program. Precious Metal Enrichment ...>> Chucabasinisabasin...IS a BASIN!!! ! Great Basin Golds!