GATE-2018 (24) :Wyllie – Time average equation

CSIR-NET

21. Match the minerals and the commonly used isotopic method of dating them.

                          Mineral                          Method of dating

                          A . Biotite                         X. Sm-Nd

                          B. Zircon                          Y. Rb-Sr

                          C. Garnet                          Z. U-Pb

1. A- Y, B- Z, C- X

2. A- X, B- Y, C- Z

3. A- X, B- Z, C- Y

4. A- Z, B- X, C- Y

Answer: 1

For better understanding please follow this link:

http://www.uvm.edu/~cmehrten/courses/earthhist/RadiometricDating.pdf