How Reliable Is Potassium Argon Dating

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Commonly the ages of minerals from rather old rocks dated by the potassium-argon method are lower than the ages obtained by either the rubidium-strontium and uranium-lead dating . Moreover, many studies have demonstrated that argon escapes readily during metamorphic events when rocks become heated and partially crystallized ."
Potassium-argon dating is accurate from 4 .3 billion years (the age of the Earth) to about 100,000 years before the present . At 100,000 years, only 0 .0053% of the potassium -40 in a rock would have decayed to argon -40, pushing the limits of present detection devices .
Over the past 60 years, potassium-argon dating has been extremely successful, particularly in dating the ocean floor and volcanic eruptions . K-Ar ages increase away from spreading ridges, just as we might expect, and recent volcanic eruptions yield very young dates, while older volcanic rocks yield very old dates . Though we know that K-Ar dating works and is generally quite accurate, however, the method does have several limitations .
Argon - Argon dating is attractive for the accuracy of 39k to minerals when they form, clearly related to dating techniques, 2007 argon - argon dating method . 2021 . R . Potassium-Argon dating or k-ar dating has become a vural cited by sal khan .
In order to determine how old the Earth is , these scientists use a technique called potassium-argon dating (K-AR) . A particular isotope of potassium , K-40, undergoes a decay process and eventually becomes an argon isotope, Ar-40 . It is reasonable to ask if the K-Ar test is accurate before we accept its results as accurate .
How potassium-argon dating works . One of the most widely used dating methods is the potassium-argon method, which has been applied to 'dating' rocks for decades, especially igneous rocks that have solidified from molten magma . The attraction of the method lies in the fact that one of the daughter elements is argon which is an inert gas .
Potassium-argon dating , method of determining the time of origin of rocks by measuring the ratio of radioactive argon to radioactive potassium in the rock . This dating method is based upon the decay of radioactive potassium -40 to radioactive argon -40 in minerals and rocks; potassium -40 also decays to calcium-40 . Thus, the ratio of argon -40 and potassium -40 and radiogenic calcium-40 to potassium -40 in a mineral or rock is a measure of the age of the sample .
www .sciencemeetsreligion .org › evolution › reliability .php
Well over forty different radiometric dating methods are in use, and a number of non-radiogenic methods not even mentioned here . Claim: A young-Earth research group reported that they sent a rock erupted in 1980 from Mount Saint Helens volcano to a dating lab and got back a potassium-argon age of several million years . This shows we should not trust radiometric dating .
There are at least 67 different uniformitarian (the present is the key to the past) methods of dating the earth other than long-age radiometric dating : each of which yield ages of less than 500 million years . 1 Of these other methods, 44 yield maximum ages of less than one million years and 23 others yield (max) ages of one million to 500 million years .1 Yet all these other science-based methods that point to a much younger age than 4 .5 billion years for earth's age are ignored or rejected . . .
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How Reliable Is Potassium Argon Dating