TEST 3 GEO 319-INTRODUCTION TO GEOCHEMISTRY Date: 5/05/2023 Duration: 1 hour Instructions: answer all questions Questions [50 marks] eukenun Bigger Tilbe Helium Use a schematic Concordia diagram to explain the difference between concordant and discordant U-Pb zircon ages. (10 marks) b) Give any 3 properties of zircon mineral that makes it extremely useful for geochronologists. (6 marks) shows zoning State any 2 ways you can distinguish zircons of magmatic origin from those of do not show any metamorphic origin. (4 marks) d) Explain why the current continental crust has higher initial Sr isotope than the current upper mantle. (5 marks) e) Give any two examples of radioactive decay mechanism with one example each of isotope system. (4 marks) f) What advantage does the isochron method have over the Concordia method? (2 marks) g) What is a stable isotope? (2 marks) h) Give any four light stable isotopes commonly used in geochemistry. -Mibroger Oxymer (4 marks) Give any two reasons why stable isotope studies are of interest in today's society. (4 marks) j) Stable isotopes can be used as paleothermometers (true or false?). (2 marks) k) What is the difference between radiogenic and radioactive isotopes? (4 marks) 1) Name any three physical processes in which fractionations of stable isotopes Occur. (3 marks) 50 34
TEST 3 GEO 319-INTRODUCTION TO GEOCHEMISTRY Date: 5/05/2023 Duration: 1 hour Instructions: answer all questions Questions [50 marks] eukenun Bigger Tilbe Helium Use a schematic Concordia diagram to explain the difference between concordant and discordant U-Pb zircon ages. (10 marks) b) Give any 3 properties of zircon mineral that makes it extremely useful for geochronologists. (6 marks) shows zoning State any 2 ways you can distinguish zircons of magmatic origin from those of do not show any metamorphic origin. (4 marks) d) Explain why the current continental crust has higher initial Sr isotope than the current upper mantle. (5 marks) e) Give any two examples of radioactive decay mechanism with one example each of isotope system. (4 marks) f) What advantage does the isochron method have over the Concordia method? (2 marks) g) What is a stable isotope? (2 marks) h) Give any four light stable isotopes commonly used in geochemistry. -Mibroger Oxymer (4 marks) Give any two reasons why stable isotope studies are of interest in today's society. (4 marks) j) Stable isotopes can be used as paleothermometers (true or false?). (2 marks) k) What is the difference between radiogenic and radioactive isotopes? (4 marks) 1) Name any three physical processes in which fractionations of stable isotopes Occur. (3 marks) 50 34
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
Related questions
Question
please answer in text form and in proper format answer with must explanation , calculation for each part and steps clearly
![TEST 3
GEO 319-INTRODUCTION TO GEOCHEMISTRY
Date: 5/05/2023
Duration: 1 hour
Instructions: answer all questions
Questions
[50 marks]
eukenun
Bigger Tilbe
Helium
Use a schematic Concordia diagram to explain the difference between
concordant and discordant U-Pb zircon ages. (10 marks)
b) Give any 3 properties of zircon mineral that makes it extremely useful for
geochronologists.
(6 marks)
shows zoning
State any 2 ways you can distinguish zircons of magmatic origin from those of
do not show any
metamorphic origin. (4 marks)
d) Explain why the current continental crust has higher initial Sr isotope than the
current upper mantle. (5 marks)
e) Give any two examples of radioactive decay mechanism with one example each
of isotope system. (4 marks)
f) What advantage does the isochron method have over the Concordia method?
(2 marks)
g) What is a stable isotope?
(2 marks)
h) Give any four light stable isotopes commonly used in geochemistry.
-Mibroger
Oxymer
(4 marks)
Give any two reasons why stable isotope studies are of interest in today's
society. (4 marks)
j) Stable isotopes can be used as paleothermometers (true or false?). (2 marks)
k) What is the difference between radiogenic and radioactive isotopes?
(4 marks)
1) Name any three physical processes in which fractionations of stable isotopes
Occur. (3 marks)
50
34](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F36e5b139-be41-4386-aed7-6ef6d5bad4a1%2Fe6f52d31-e728-469a-979a-17d7f0f63aec%2Fienvr0d_processed.jpeg&w=3840&q=75)
Transcribed Image Text:TEST 3
GEO 319-INTRODUCTION TO GEOCHEMISTRY
Date: 5/05/2023
Duration: 1 hour
Instructions: answer all questions
Questions
[50 marks]
eukenun
Bigger Tilbe
Helium
Use a schematic Concordia diagram to explain the difference between
concordant and discordant U-Pb zircon ages. (10 marks)
b) Give any 3 properties of zircon mineral that makes it extremely useful for
geochronologists.
(6 marks)
shows zoning
State any 2 ways you can distinguish zircons of magmatic origin from those of
do not show any
metamorphic origin. (4 marks)
d) Explain why the current continental crust has higher initial Sr isotope than the
current upper mantle. (5 marks)
e) Give any two examples of radioactive decay mechanism with one example each
of isotope system. (4 marks)
f) What advantage does the isochron method have over the Concordia method?
(2 marks)
g) What is a stable isotope?
(2 marks)
h) Give any four light stable isotopes commonly used in geochemistry.
-Mibroger
Oxymer
(4 marks)
Give any two reasons why stable isotope studies are of interest in today's
society. (4 marks)
j) Stable isotopes can be used as paleothermometers (true or false?). (2 marks)
k) What is the difference between radiogenic and radioactive isotopes?
(4 marks)
1) Name any three physical processes in which fractionations of stable isotopes
Occur. (3 marks)
50
34
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