YEC Best Evidence 7: ancient carbon — intrinsic or contamination? – How old is the earth?
Carbon dating can be used on objects ranging from a few Here's an example of calculating carbon dating. Example Problem. Problem 1: 60 pts — (a,b,c)=(20,35,5). Problem 2: 40 Problem 1: Radiocarbon Dating an element depends on the number of protons it has, for example, 6 for carbon. How Generate a plot of the histogram of wait times (number of 12C. 1. FIGURE Calibration of a radiocarbon measurement of Æ30 years BP. The gray histogram shows possible ages for the sample (the higher the value , which shows the calibration of a sample that has been radiocarbon-dated at This raises significant problems for studies attempting to resolve short-term.
A normal distribution is shown at left; this is the input data, in radiocarbon years. The central darker part of the normal curve is the range within one standard deviation of the mean; the lighter grey area shows the range within two standard deviations of the mean. This output can be compared with the output of the intercept method in the graph above for the same radiocarbon date range.
The resulting curve can then be matched to the actual calibration curve by identifying where, in the range suggested by the radiocarbon dates, the wiggles in the calibration curve best match the wiggles in the curve of sample dates. This "wiggle-matching" technique can lead to more precise dating than is possible with individual radiocarbon dates.
Calibration of radiocarbon dates
Wiggle-matching can be used in places where there is a plateau on the calibration curve, and hence can provide a much more accurate date than the intercept or probability methods are able to produce.
Unless the samples are definitely of the same age for example, if they were both physically taken from a single item a statistical test must be applied to determine if the dates do derive from the same object. This is done by calculating a combined error term for the radiocarbon dates for the samples in question, and then calculating a pooled mean age.
It is then possible to apply a T test to determine if the samples have the same true mean. Once this is done the error for the pooled mean age can be calculated, giving a final answer of a single date and range, with a narrower probability distribution i.
For example, if a series of radiocarbon dates is taken from different levels in a given stratigraphic sequence, Bayesian analysis can help determine if some of the dates should be discarded as anomalies, and can use the information to improve the output probability distributions.
Dr Bertsche is also an evangelical Christian, and as such, his interest in the subject is more out of concern for factual accuracy in our apologetics than in conforming to a particular ideology. It is also important to note that potential sources of contamination have not been fully quantified, and that additional, as yet unknown contamination vectors could be at work. The current scientific consensus is that contamination in radiocarbon dating can reach levels of up to about 0.
In any case, experimental error or sloppy laboratory procedure could also increase contamination, and consequently solid peer review and replication of the results are essential.
The study of solar neutrinos demands radiocarbon-free fossil fuels It turns out that carbon contamination is an important question in the physics community for reasons other than radiometric dating. Physicists studying solar neutrinos need to find sources of carbon that contain a 14C content of less than one part in Kathleen Hunt has this to say about it: It turns out that the origin and concentration of 14C in fossil fuels is important to the physics community because of its relevance for detection of solar neutrinos.
Scintillation fluid is made from fossil fuels such as methane or oil plus some other ingredientsand it sparkles when struck by beta particles or certain other events such as neutrinos. The Borexino detector has tons of scintillant.
However, if there are any native beta emitters in the fluid itself, that natural radioactive decay will also produce scintillant flashes.
Apologetics Press - Dating in Archaeology: Radiocarbon & Tree-Ring Dating
I use scintillant every day in my own work to detect 14C and 3H-tagged hormones. But I only use a milliliter at a time — the concept of tons really boggles the mind!
So, the physics community has gotten interested in finding out whether and why fossil fuels have native radioactivity. The Borexino detector, and other planned detectors of this type, must keep native beta emissions to below 1 count per ton of fluid per week to reliably detect solar neutrinos.
In comparison, my little hormone vials, here in my above-ground lab, have a background count of about 25 counts per minute for 3. In the course of their research, the scientists concerned have discovered that carbon levels in ancient coals vary widely, and strongly correlate with the presence of uranium deposits nearby: So, the physicists want to find fossil fuels that have very little 14C.
Some have no detectable 14C; some have quite a lot of 14C. Apparently it correlates best with the content of the natural radioactivity of the rocks surrounding the fossil fuels, particularly the neutron- and alpha-particle-emitting isotopes of the uranium-thorium series.
Calibration of radiocarbon dates - Wikipedia
Gove and his colleagues told me they think the evidence so far demonstrates that 14C in coal and other fossil fuels is derived entirely from new production of 14C by local radioactive decay of the uranium-thorium series. Many studies verify that coals vary widely in uranium-thorium content, and that this can result in inflated content of certain isotopes relevant to radiometric dating see abstracts below.
I now understand why fossil fuels are not routinely used in radiometric dating! And the fact that they need to get their hands on eight hundred tons of radiocarbon-free deposits puts this one into the same category as oil exploration in general: We would not expect to see it in some materials but not in others, and we would certainly not expect different tests on the same samples to give significantly different results.
Nor would we expect to see any kind of correlation with the presence of nearby radioactive rocks. But that is not what is observed. While some materials, e. Why do only some materials show evidence of this intrinsic radiocarbon? Why does some anthracite and diamond exist with no measurable intrinsic radiocarbon?
Why is its presence in carbonates so much more variable than in other materials, e. Why is it often found in bone carbonates but not in collagen from the same bone?