Radioactivity : Potassium 40 Radioactivity : Potassium 40

K-40 dating, a curiosity of nature and a very long lived beta emitter

The total K, Ar, and Ar in the material in question can all be measured accurately. So, when a mineral forms — whether from molten rockor from substances dissolved in water — it will be initially argon-free, even if there is some argon in the liquid.

I wonder, what about granitic intrusions, or Plutonic rocks? Access to page in french Learn more: Synthetic introduction of argon into mica at high pressures and temperatures. The fourth assumption is probably satisfied for most samples. But if the Argon pressure is greater outside the rock, then the Argon will flow into the rock.

Sometimes the whole rock basalt date is reported, but sometimes only a mineral fraction is reported from the basalt, like biotite or sanidine. One has to wonder why these kinds of experiments were not originally done.

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This isotope makes up one ten thousandth of the potassium found naturally. Another name for plutonic rocks is intrusive igneous rocks.

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Or might we suggest that molten rock was intruded at very high levels of pressure. Its mass energy or internal energyhowever, is actually greater than either of its neighbours — calcium 40 and argon If an experiment is conducted and the information needed to answer the problem is not forthcoming, then another experiment can be designed to answer the problem.

Would all the Argon come out of the heated rock under these high K-40 dating conditions? The sixth assumption is also fairly secure. Argon is a gas that does not ordinarily combine with other elements.

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However, this contamination can easily be accounted for in the calculations. Limitations of the Historical Sciences In any kind of a historical science, assumptions have to be made in the assessing of historical dates.

If the Argon pressure is greater in the rock, then Argon will flow out of the rock.

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There is such a thing as multiple interpretation to the data base. K—Ar dating was instrumental in the development of the geomagnetic polarity time scale.

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Why is it that one type of date is used one time and not at another time, is not discussed in the paper. For more on Cold Fusion and the creation event K-40 dating on Extinct Nuclides.

This is not right!

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Internat Geol Rev ;9: Doing simple calculations it is easy to see that if the experiment was done again, but with only 2 atmospheres of Argon, that normal amounts of Argon would be forced into the rock. If in fact such an answer were found, it would be quickly dismissed.

These features are thought to allow any naturally occurring Argon from contaminating our measurements of the Argon 40 that is being produced from the radioactive decay of K However there may be a new development in the field of nuclear reactions that could change this situation.

Such a discussion might never be allowed in normal scientific circles because of the assumptions they choose to believe as being true. In the second published paper Karpinskaya TB: For instance, I am told that there are sometimes found in the same level both "early" forms and "modern" forms of man.

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This is very interesting. Synthesis of Argon muscovite. Ar—Ar dating is a similar technique which compares isotopic ratios from the same portion of the sample to avoid this problem.

There is no question about it. Were the rock layers laid down in a vacuum?

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A loss of Argon would cause the rock to date younger than it should according to evolutionary thought. Potassium—argon dating[ edit ] Decay scheme Potassium is especially important in potassium—argon K—Ar dating. If we know when a lava flow was made because it happened recently, and we then check to see how much Argon is in the rock; That measurement will tell us how well the Argon actually came out of the rock.