Sample

Rock

Rb

Sr

Rb⁸⁷/Sr⁸⁶

Error

Sr⁸⁷/Sr⁸⁶

Error

T(Ma)

Error

(ppm)

(ppm)

(X)

(Y)

1.42

Ri = 0.705

4KH

Khondalite

117.0

50.9

6.755

0.078

0.864593

0.000117

1644.4

27.7

Sm

Nd

¹⁴⁷Sm/¹⁴⁴Nd

Error

¹⁴³Nd/¹⁴⁴Nd

Error

f_Sm/Nd

T_DePaolo

₍₀₎

(ppm)

(ppm)

(Ga)

4KH

Khondalite

3.665

19.703

0.1125

0.0007

0.511381

0.000008

−0.43

2.5

−24.52

4MG

Mafic granulite

3.137

9.770

0.1941

0.0011

0.512835

0.000013

−0.01

1.6

3.85

4BG

Granite

8.885

52.49

0.1024

0.0006

0.510863

0.000009

−0.48

3.0

−34.63

4BB

Mafic enclave

1.621

6.425

0.1525

0.0004

0.512052

0.000012

−0.22

2.5

−11.42

Material

K %

Error K%

Ar⁴⁰rad

(10⁻⁶ cm³ STP/g)

Ar⁴⁰ Atm (%)

Age and error (Ma)

PK 3/2B/05

Mafic Granulite

Amphibole

0.7778

1.3477

20.68

7.05

580.5 ± 15