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To: E. Charters who wrote (88698)	8/11/2002 6:06:05 PM
From: E. Charters	Respond to of 116768

At the risk of overdensifying material to be digested, consider this empirical fact. There are at mantle depths, quite shallow, only 150 miles deep,. a minerals layer of high density known as the chromite-harzburgite layer mixed with relatively light,but highly pressure resistant materials, garnet, pyroxene and diamond which is carbon of 3.5 specific gravity. This is the layer where diamonds formed 3 billion years ago, when the earth was mostly molten. We know this because we can calculate the pressure-depth from the composition of the minerals, extrapolated from explosive formation or hydraulic pressure tests in laboratories. We can see changing compositions, and attendant pressure resisting structure formed in lab pressure experiments. (It can be shown that perovskite (calcium-titanium- oxide) octahedral structure best resists pressure and is most compact) It has even been suggested that the centre of this mineral planet, earth, may be one giant pervoskite structure. (Most planets are gas planets, by the way) From these eutectic curve made from heat-pressure experiments we can say what pressure and heat minerals found were formed at. From radiation isotopic decay extrapolations of material found within all diamonds we know that the age of diamonds is one age, very ancient, and the stability of that carbon form is within one pressure and temperature range. But at this pressure and temperature at this depth we find a layer very heavy iron-chrome (oxide and silicate) minerals mixed with medium density garnets from 3.5 to 4.3 and pyroxenes from 3.5 SG. (Some of these oxide minerals approach 4.8 SG whereas the earth's average density, is 5.5 or that of Millerite - NiS) These medium density minerals, such as garnet are highly pressure resistant forms. It would seem that for these minerals to stay at this depth, only 150 miles below the surface, when the earth was more molten than it is today, that there must be a tendency for heavy materials to float in bands as the pull towards the centre lessens with depth. If I am wrong and the greater density materials are propelled towards the centre of the mass, then it must be that there is a gradient of the highest density materials towards the centre. At the very centre there must be a ball of solid platinum of SG 21.5 and it is ringed with a spherical shell of molten gold of SG 19.5. These are the two heaviest materials known. Uranium which would almost always oxidize is relatively light and would be found in a band around the earth at a higher level in a raging nuclear furnace, keeping the core and mantle molten. (The earth's heat is anomalously high. It should be a ball of ice by all calculation like Venus would be except for its cloud layer, so we know that it gets it's heat from a subterranean nuclear furnace of enormous proportions.) With all that gold at the centre of the earth, it would pay no doubt to tunnel into it, even given the risk of passing through a nuclear hades. EC<:-} EC<:-}

To: E. Charters who wrote (88698)	8/11/2002 6:12:12 PM
From: Hawkmoon	Read Replies (2) \| Respond to of 116768

Question. If gravity is as you say it is, equal at the center, then would it not also be the case with a singularity (black hole)?? Can we theorize that the center of a singularity consists of weightlessness?? Hawk