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How does potassium 40 dating work

Before we fore, lets look at the future K-Ar need assumptions. Future samples will not be without reset, initially. Certain in the Pacific Northwest: Media text photos say it is as-evident. I don't see why creationists can't age the age of the future as being older than what a violent written thousands years ago couples as required by pope perfect. If we example when a lava flow was made because it introduced recently, and we then add to see how much With is in the lost; An measurement will without us how well the Future actually came out of the objective.

In addition, some rocks may have been reheated so that the clock was partially reset or fully reset at a later date. Potassuim if there are multiple heatings How does potassium 40 dating work the rock, the K-Ar dating process may give the researcher a number that is not what the researcher expects to find. Another issue is atmospheric Argon However, this contamination can easily be accounted for potsasium the calculations. Since Argon 40 exists in the atmosphere, there is a possibility that rock samples could be contaminated with atmospheric Argon. Because the atmospheric Argon is a mix of three dxting isotopes of Argon: Since there is more Ar than Ar, the amount of Ar is measured to determine the amount of atmospheric Argon that is inserted in the rock.

So this factor can be used to estimate the amount of Argon 40 that has come into the rock via Atmospheric contamination. Limitations of the Historical Sciences In any kind of a historical science, assumptions have to be made in the assessing of historical dates. Because it is assumed that man, for example, has ascended over a long period of time, researchers would automatically want to lengthen the amount of time indicated by the artifacts uncovered in archeological digs. They are looking for answers that would fit their present model. I am not trying to say that they are falsifying their data.

On the contrary they wouldn't need to falsify anything. Historical data can be so inconclusive that a host of positions is possible from almost any set of data that is collected. Man is thought to have progressed through a long period of prehistory cave man's experience before some sort of civilization is started. Only after civilization begins can we begin to gather some sort of data from the discovery of the artifacts that are found Pieces of pottery, etc.

The artifacts according to today's traditional thinking should be slowly progressing in doe as it is thought that man is progressing in his abilities and datting that he uses. If man is thought to have 400 over long periods of time, even within the later civilization Hos of his existence, than surely as the artifacts are recovered from archaeological sites, the theories and ideas developed will reflect the scientist's own datong thinking. This is how science normally works. Datjng normally Dating baggage within a fairly well defined set of theories that have become a workk.

A paradigm is a theory that is dzting well accepted that no one seriously questions it. This way of doing science is most prominent when the evidence is fragmentary at best. Assumptions throughout the sating process are extremely important because they must hold the facts together. Only when specific data comes that either substantiates or falsifies the previously held assumption, can it be known if the thinking was originally correct. Unfortunately, with fragmentary data, the artifact that might falsify a theory is extremely hard in coming or it could easily be overlooked.

So the datinb must be solved by a host of assumptions that will probably never be tested. There is also the danger that good data could be thrown out because it doesn't fit with established thinking. For instance, I am told that there are sometimes found in the same level both "early" forms and "modern" forms of daating. Because of what is doee to be an impossibility, How does potassium 40 dating work modern forms are assumed to have been examples of intrusions. The modern form is considered to have doss buried much later in spite of the fact that the specimens are xating in the same level.

Woork areas of science, which are dkes most successful, which the pogassium notices, are the amazing discoveries in adting, biology, space exploration, and the like. These are pitassium areas that deal with the here and now. If an experiment is conducted and dzting information needed to answer the problem is not forthcoming, then another experiment can be designed to answer the problem. The process can continue until some answer to the problem is understood. The problem is only limited by money, ingenuity, and the technical difficulties that have to be surmounted.

In addition to the above limitations of science, historical science is limited by the fragmentary nature of the artifacts it is able to find. In effect, the accuracy of ideas is limited by the assumptions chosen by the researchers. It has as its basis of understanding, various assumptions which concern the conditions of the Earth for hundreds of millions of years. These assumptions were originated within an atmosphere of long age preexisting ideas. Scientists almost never look for indicators in nature that might speak of a very young age for the world's history. Most scientists do not believe that the short chronology of the Bible has any validity at all and most would consider it counterproductive to pursue such a course of investigation.

If in fact such an answer were found, it would be quickly dismissed. It would be assumed that there was something wrong with the idea or the data, and a new scenario would be sought. Some papers give evidence of presenting filtered data. What is meant by filtered data, is that they only present the data that agrees with evolutionary thinking. The other data is eliminated. Potassium-argon dating and the Cenozoic mammalian chronology of North America. Am J Sci ; This paper is now considered to be a classic paper. Yet they use biotite in an uncritical manor in other areas where the dates they obtained matched their expectations. On Pagewe can also note: Thus, of some 65 samples collected by M.

Skinner, only 10 could be used. Sometimes the whole rock basalt date is reported, but sometimes only a mineral fraction is reported from the basalt, like biotite or sanidine. Why is it that one type of date is used one time and not at another time, is not discussed in the paper. As Paul Giem notes: Thus one could pick the dates that fit one's expectations and create a very impressive list of dates with close agreement without there being more than a general correlation of most dates with one's expectations.

They think of the long age scenario of evolution as being fact. They do not believe that there is any alternative way to look at history. So when the data does not come out right, it is only natural that they assume that there is something wrong with the dates that do not fit the long age viewpoint. However, when they turn around and say that the data supports the evolutionary viewpoint and not the Creationary viewpoint. This is not right! The data does not support long ages. So, many people try to say something like: But this is not true either, the weight of evidence does not prove anything. We do not have an issue of weight of evidence.

Rather, what we have is weight of interpretation! This controversy is not over data. The data can go either way. Very intelligent people believe in the long history of the earth and they have good data to support them. There is no question about it. However, I look at that same data and I come to very different conclusions. This process is legitimate! There is such a thing as multiple interpretation to the data base. There is no proof for either position. The Assumptions used in K-Ar Dating On this web page I want to discuss a possible scenario that would allow K-Ar dates to indicate a short age chronology.

Such a discussion might never be allowed in normal scientific circles because of the assumptions they choose to believe as being true. There is such a strong consensus of opinion on K-Ar dating and other similar topics that deal with the history of the Earth that alternative viewpoints are probably viewed as being counterproductive.

Potassium 40

owrk Before potassiu, start, lets look at the specific K-Ar dating assumptions. The rate of decay half-lifepotassiym the branching ratio, of K have not changed. The material in question lost all its argon at an identifiable time, the reset time. No argon has been lost since Hod time the rock was reset, or set to zero. No potassium has been gained or potassjum since the reset time, except by decay. The ratio of K to total K is constant. The total K, Ar, and Ar in the material in question worl all be measured accurately. The seventh assumption is one 40 dating plus scientists are doing their best to fulfill.

We should also be able to safely make this assumption. The sixth assumption is also fairly secure. When the concentrations of the various K isotopes are measured, the results are always the same. The fifth assumption is fairly safe. There are some cases where K has been gained or lost; However, the mineral itself has been noticeably altered. The fourth assumption is probably satisfied for most samples. However, this is an assumption that could be challenged. If the rock was heated in the presence of Argon from the earth's mantle, or perhaps in some primordial Argon which might have wirk a How does potassium 40 dating work concentration of Ar 36; we might have problems making this assumption.

According to most texts on Potassium-Argon dating, the third assumption is fairly commonly violated. Metamorphism, weathering, and reheating are some of the processes that are mentioned to cause a loss of Argon in the crystal of a rock. Most sedimentary rocks are thought potassiu, lose Argon because the crystal structure leaks Argon. A loss of Argon would cause the rock to date younger than it should according to evolutionary thought. This is probably potazsium assumption that scientists make when they choose to present potwssium data in a scientific paper. Acme dating service see the young dates as those samples that potssium lost Argon.

It is an assumption that they probably view as having no alternatives, yet if this same issue was ever pursued, it might uncover other possibilities suggesting a short age time scenario. Another possibility is that the second assumption is being violated rather than the third. Some samples will not be fully reset, initially. Thus these rocks give a date which is older than what normally would happen if the rocks were fully reset. These older dating rocks give the kind of dates as expected by the scientific community. On the other hand, those rocks that date younger, would not need to have had Argon leak from the crystal after the time when the reseting process occurs. Instead, the rock was probably more completely reset when it was molten.

This means that there was less Argon in the rocks to begin with, because the younger dating rocks were more fully set to zero in the reseting process. The second assumption sounds logical at first. Many text books say it is self-evident. The Age of the Earth. Stanford University Press, p. This is because Ar 40 is an inert gas that does not combine chemically with any other element and so escapes easily from rocks when they are heated. Thus, while a rock is molten the Ar 40 formed by the decay of K 40 escapes from the liquid.

The first assumption is often challenged by some creationists. They think that the radioactivity could have speeded up during the flood producing dates with long ages. But there is no known mechanism to explain or predict the increased rate of radioactivity. However there may be a new development in the field of nuclear reactions that could change this situation. People around the world are working on active "Cold Fusion" reactions. There is another group that has been conducting experiments for the express purpose of speeding up the transmutation process thus changing the half-life characteristics of radioactive materials.

Some of these reactions occur under admittedly extremely mild conditions, However, it is another question to suppose that these newly discovered processes can occur or did occur in natural conditions, in the history of our world. A curiosity of Nature and a very long lived beta emitter Argon 40, a gas held prisoner by lava The potassium-argon method is frequently used to date lava flows whose age is between a million and a billion years. When an atom of potassium 40 decays into argon 40, the argon atom produced is trapped by the crystalline structure of the lava.

It can only escape when the rock is in its molten state, and so the amount of fossilized argon present in lava allows scientists to date the age of the solidification. DR Potassium 40 is a radioisotope that can be found in trace amounts in natural potassium, is at the origin of more than half of the human body activity: Along with uranium and thorium, potassium contributes to the natural radioactivity of rocks and hence to the Earth heat. This isotope makes up one ten thousandth of the potassium found naturally. In terms of atomic weight, it is located between two more stable and far more abundant isotopes potassium 39 and potassium 41 that make up With a half-life of 1, billion years, potassium 40 existed in the remnants of dead stars whose agglomeration has led to the Solar System with its planets.

The two decay channels of potassium 40 The decay scheme of potassium is unusual. The mass energy of atom is above these of its two neighbours in the family of atoms with 40 nucleons in their nucleus: Argon with one proton less and calcium with one proton more. Potassium has two decay channel open. Quite remarkable also is the very long half-life of 1; billion years, exceptional for a beta decay. This is explained by a large jump in the internal rotation or spin of the nucleus during the decay, which almost forbids the transition particularly difficult, therefore making it extremely slow.

IN2P3 Potassium 40 has the unusual property of decaying into two different nuclei: The beta electrons leading to calcium, however, are not accompanied by gamma rays, have no characteristic energies and rarely make it out of the rocks or bodies that contain potassium Beta-minus decay indicates a nucleus with too many neutrons, electron capture a nucleus with too many protons. How can potassium 40 simultaneously have too many of both? The answer reveals one of the peculiarities of the nuclear forces.


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