I'm doing an astronomy course which I'm enjoying immensely. There was an assignment set for the first module which was on the subject of Planetary Science. We all handed in the assignment tonight so I haven't come here to ask anyone to do my home work for me! But whilst talking to the other people on the course it would appear that we all got differing results on a particular question about calculating the age of a meteorite!
Here's the question:
(b) Fig. 1 is a Sm-Nd isochron plot of the orthopyroxene mineral that makes up the bulk of the meteorite ALH84001.
(i) Determine the slope of the isochron.
(ii) Thus calculate the age of the meteorite. The constant for the decay of 147
Sm, λ = 6.54 x 10-12
This is my answer:
(i) Slope = rise/run
(ii) t = ln(m+1)/λ
= 175*106 years
My answer seems quite low for the age of a meteorite but the rock in question is acrondrite so it might not be. I would be interested to know what others here might make it.
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