Problem 47425. Uranium–Lead Dating

Created by David Hill

Solve Later

<div style = "text-align: start; line-height: 20.44px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: none solid rgb(0, 0, 0); white-space: normal; "><div style="block-size: 63px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 31.5px; transform-origin: 407px 31.5px; vertical-align: baseline; "><div style="font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 31.5px; text-align: left; transform-origin: 384px 31.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; "><span style="">Using the input data set of the measured Pb-206/U-238 and Pb-207/U-235 ratios of several samples from the same Zircon specimen, determine the age of the specimen (rounded to 1e6 years) by the intersection of the concordant curve with the linear fit of the data. Use 7.04e8 and 4.47e9 for the half-lives of U-235 and U-238 to Pb-207 and Pb-206.</span></span></div></div></div>

Solve

Solution Stats

11 Solutions
5 Solvers

Last Solution submitted on Apr 16, 2022

Last 200 Solutions

Problem Comments

3 Comments

3 Comments

William on 11 Nov 2020

In each case, the linear fit intercepts the concordant curve in two places. I think it is the higher one that we are seeking, no? For 3 of the test problems (# 2,4,5) the solution given seems to be the lower one.

David Hill on 11 Nov 2020

Yes, you want the higher intercept. I will recheck this.

David Hill on 11 Nov 2020

Yes, you were correct. Sorry for the mistake. It has been fixed.

Solution Comments

Solution 3597200

1 Comment

1 Comment

David Hill on 10 Nov 2020

Very nice.

Problem Recent Solvers5

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 47425. Uranium–Lead Dating

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers5

Suggested Problems

More from this Author50

Problem Tags

Community Treasure Hunt

Problem 47425. Uranium–Lead Dating

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers5

Suggested Problems

More from this Author50

Problem Tags

Community Treasure Hunt

Players