1. Determine the age of the zircon mineral grain from a granite in the Sierra Ne

Question

1. Determine the age of the zircon mineral grain from a granite in the Sierra Nevada using the 235U to 207Pb method. The mineral has 1050 235U atoms and 120 207Pb atoms. The half life (T1/2) of this system is 713 million years. What is the age? Use the curve equation T = -1.443ln(f) 1. Determine Pi, initial parent amount (add Parent + Daughter) 2. f = P/Pi 3. Use the curve equation to solve for T (number of half lives elapsed) 4. Use the age equation to determine age. Age = T (T1/2)

2. Determine the age of the zircon mineral grain from a granite in the Sierra Nevada using the 40K to 40Ar method. The mineral has 1201 40K atoms and 155 40Ar atoms. The half life (T1/2) of this system is 1300 million years. What is the age? Use the curve equation T = -1.443ln(f)

1. Determine Pi, initial parent amount (add Parent + Daughter)

2. f = P/Pi

3. Use the curve equation to solve for T (number of half lives elapsed)

4. Use the age equation to determine age. Age = T (T1/2)

3) Determine the age of the zircon mineral grain from a granite in the Sierra Nevada using the 14C to 14N method. The mineral has 56788 14C atoms and 87655 14N atoms. The half life (T1/2) of this system is 5730 years. What is the age? Use the curve equation T = -1.443ln(f)

1. Determine Pi, initial parent amount (add Parent + Daughter)

2. f = P/Pi

3. Use the curve equation to solve for T (number of half lives elapsed)

4. Use the age equation to determine age. Age = T (T1/2)

Explanation / Answer

The age of the zircon mineral grain from a granite in the Sierra Nevada using the 235U to 207Pb method

1. 135 Ma

The age of the zircon mineral grain from a granite in the Sierra Nevada using the 40K to 40Ar method.

2. 228Ma

The age of the zircon mineral grain from a granite in the Sierra Nevada using the 14C to 14N method

3.5280 yeras

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