Am J Sci ; The second assumption sounds logical at first.
By comparing the proportion of K to Ar in a sample of volcanic rock, and knowing the decay rate of K, the date that the rock formed can be determined. The rate of decay half-lifeand the branching ratio, of K have not changed.
Also, if there is a partial pressure of Argon surrounding the rock, then, as experiments indicate, Argon might even enter the rock during its cooling to increase its content of Argon. These are the areas that deal with the here and now. Accuracy is greater and errors are lower. But micasplagioclase, hornblende, clays and other minerals can yield good data, as can whole-rock analyses.
This includes the Paleozoic, Mesozoic, and Cenozoic layers. Later, when we start discussing the K-Ar dating technique from a Creationary perspective, we will see that this reseting of the clock is a major issue.
Only when specific data comes that either substantiates or falsifies the previously held assumption, can it be known if the dating k-ar was originally correct. There is no dating k-ar about it.
In the experiment, the Argon that was absorbed into the rock looked just like the normal radiogenic Argon that comes from K 40! I'm sure you've had many responses to your article about the potassium-argon dating article and I'm sure sure you won't respond to this one. Dating mechanisms such as Carbon, work within the creationary paradigm without the need of having a change in half-lives.
When rocks are heated to the melting point, any Ar contained in them is released into the atmosphere. The target mineral is separated using heavy liquids, then hand-picked under the microscope for the purest possible sample.
The fifth assumption is fairly safe. It does not chemically react with other dating forte rune factory 4 at all.
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 Data is used to help illustrate a possible scenario allowing K-Ar dates to be interpreted in terms or a short age chronology. On the other hand, if the Argon has a place to go, as in a vacuum, then the Argon will escape out of the rock.
Very intelligent people believe in the long history of the earth and they have good data to support them. Why is it that one type of date is used one time and not at another time, is not discussed in the paper.
Many text books say it is self-evident. When the rock is molten hot, it is more liquid in texture, allowing the Argon gas to dating k-ar.
These assumptions were originated within an atmosphere of long age preexisting ideas. What conditions could have been present when igneous and volcanic rock was formed? Such a discussion might never be allowed in normal scientific circles because of the assumptions they choose to believe as being true.
How are Samples Processed? Because 39 Ar has a very short half-life, it is guaranteed to be absent in the sample beforehand, so it's a clean indicator of the potassium content. It would seem that Calcium 40 would be the better product atom to track since almost 10 times of it is produced over Ar These older dating rocks give the kind of dates as expected by the scientific community.