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Earth, Planets and Space

Table 3 Summary of the early to middle Miocene paleomagnetic directions of the Mizunami-Kani and Izumo areas

From: Timing of clockwise rotation of Southwest Japan: constraints from new middle Miocene paleomagnetic results

 

Age

N

D

I

α 95

R

ΔR

Ref.

(Ma)

 

(°)

(°)

(°)

(°)

(°)

 

Mizunami-Kani

        

 Oidawara F

15.8–15.7

19

10.5

41.1

7.0

4.8

9.8

1

 Akeyo F

18.1–17.5

19

49.9

51.9

5.8

44.2

9.9

2, 3, 4

 Hachiya F (site HCY5)*

22.2

(6)

28.7

57.6

7.5

23.0

13.0

5

 Hachiya F (site HCY4)*

22.2

(6)

53.8

60.5

12.5

48.1

21.8

5

Izumo

        

 Omori F (site 08120205)*

14.6 ± 0.8

(4)

344.4

49.4

8.5

−22.1

12.2

6

 Kawai F (site 08122002)*

15.4 ± 0.6

(3)

355.5

43.4

11.6

−10.0

14.3

6

 Hata F

18–15

6

3.5

42.9

9.9

−2.0

12.5

6

 Daito F (site DT-1)*

16.3 ± 1.2

(5)

19.6

32.6

7.5

14.1

9.5

6

 Yoshida PC (site YS-1)*

16.4 ± 0.4

(4)

10.2

53.4

9.3

4.7

14.1

6

 Sada F

22–18

6

52.5

43.2

13.1

47.0

15.8

6

  1. Data with asterisks are site-mean directions of igneous rocks
  2. N number of sites (number of samples in parentheses), D declination, I inclination, α95 radius of 95 % confidence cone, R angle of rotation with respect to the North China Block (positive for an observed direction clockwise from the expected direction), ΔR 95 % confidence limit of R, calculated after Demarest (1983), F formation, PC plutonic complex. References: 1 this study, 2 Hayashida (1986), 3 Hiroki and Matsumoto (1999), 4 Itoh et al. (2006), 5 Hayashida et al. (1991), 6 Sawada et al. (2013)
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