Direct dating of gold by radiogenic helium Sexy chat xnx page 23
The statistical error bars of both data and prediction meshed neatly, with the central points of each almost overlapping each other.This remarkable line-up of experiment and theory would be unlikely to occur by chance. My chapter of the RATE "results" book shows it is very unlikely. Such low temperatures would be impossible at the depth from which our zircons came.Not being a creationist, he was not familiar with our prediction.Not being in touch with the experiment, we had no control over its outcome. When we plotted the results, they fell right on the 6000 year prediction!They wriggle between the atoms of a material and spread themselves as far apart as possible. Because the zircons have almost zero lead to begin with, essentially all the lead 206 atoms in a zircon today must have come from decay of uranium 238.
Roughly speaking, we could divide the amount of helium atoms lost from the zircon by the loss rate to get the age of the zircon. The golden sand in the top represents helium atoms still in a zircon.
Radioactive crystals make and lose helium To understand the two hourglasses, you need to know what goes on in tiny radioactive forms around it.
Other minerals, such as quartz and feldspar, crystallize around the biotite to complete the rock.
The zircons in the report, plus more of the same size that we obtained from the same site, had retained significant fractions (different at each different temperature at the site) of the original helium deposited.
Therefore we knew how much helium had leaked from the crystals.