Table 1 U-series data and calculated 230Th-234U-238U and U/Uinitial ages.

From: Timing of the Brunhes-Matuyama transition constrained by U-series disequilibrium

Location

Analytical technique

Depth (m)

238U ppm

±

(234U/238U)

±

(230Th/238U)

±

(230Th/U) age ka

Er.+

Er.−

(234U/238U)0

±

(U/U0) age ka

Er.+

Er.−

Road section

TIMS

Outcrop

2.134

0.013

4.711

0.017

1.060

0.008

26.932

0.338

0.335

5.005

0.018

   

Road section

TIMS

Outcrop

2.030

0.013

4.829

0.020

1.031

0.008

25.412

0.325

0.322

5.114

0.020

   

Road section

TIMS

Outcrop

6.096

0.040

2.290

0.011

2.786

0.023

515.124

96.071

57.110

6.533

0.770

   

Road section

TIMS

Outcrop

2.136

0.014

5.070

0.018

0.521

0.005

11.670

0.150

0.149

5.206

0.018

   

Road section

MC-ICP-MS

Outcrop

3.012

0.013

5.070

0.017

0.512

0.004

11.477

0.140

0.138

5.204

0.018

   

Road section

MC-ICP-MS

Outcrop

3.054

0.011

5.055

0.015

0.516

0.004

11.593

0.134

0.133

5.190

0.015

   

Road section

MC-ICP-MS

Outcrop

3.108

0.030

5.080

0.017

0.513

0.006

11.463

0.180

0.178

5.215

0.017

   

Road section

α spectrometry

Outcrop

7.348

n.d.

2.773

0.005

2.984

0.077

261.554

22.905

19.681

4.713

0.206

   

Road section

α spectrometry

Outcrop

2.252

n.d.

5.020

0.039

0.733

0.021

16.888

0.668

0.655

5.217

0.040

   

Road section

α spectrometry

Outcrop

2.069

n.d.

4.637

0.041

1.150

0.048

29.992

1.712

1.662

4.959

0.044

   

Road section

α spectrometry

Outcrop

1.900

n.d.

5.040

0.043

0.514

0.016

11.589

0.485

0.475

5.175

0.043

   

Road section

α spectrometry

Outcrop

1.916

n.d.

5.503

0.100

0.963

0.063

20.479

1.895

1.804

5.771

0.103

   

Core

TIMS

2.5

1.991

0.013

5.032

0.031

0.785

0.007

18.121

0.296

0.292

5.244

0.031

   

Core

TIMS

3.6

1.909

0.014

5.068

0.029

0.730

0.009

16.640

0.326

0.322

5.264

0.029

   

Core

TIMS

4.4

1.039

0.006

4.683

0.031

1.173

0.010

30.312

0.509

0.500

5.012

0.032

   

Core

TIMS

4.8

2.653

0.012

2.381

0.015

2.811

0.024

398.307

40.322

31.056

5.257

0.272

   

Core

TIMS

5.6

3.889

0.030

2.230

0.015

2.440

0.022

296.126

18.930

16.408

3.841

0.082

   

Core

TIMS

8

2.109

0.009

1.442

0.008

1.754

0.017

n.d.

n.d.

n.d.

  

794.272

48.329

53.739

Core

MC-ICP-MS

8.09

2.914

0.001

1.466

0.003

1.659

0.011

643.793

n.d.

107.206

  

775.791

44.059

49.579

Core

MC-ICP-MS

8.92

2.827

0.009

1.461

0.003

1.644

0.011

578.565

176.650

75.129

  

779.534

44.081

49.601

Core

MC-ICP-MS

9.02

5.312

0.023

1.472

0.005

1.668

0.012

633.600

n.d.

117.537

  

770.887

45.383

50.880

Core

MC-ICP-MS

9.3

1.697

0.006

1.461

0.004

1.667

0.011

n.d.

n.d.

n.d.

  

779.073

44.466

49.979

Core

TIMS

9.3

1.572

0.009

1.443

0.006

1.648

0.013

n.d.

n.d.

n.d.

  

793.233

46.115

51.595

Core

MC-ICP-MS

9.5

1.374

0.005

1.523

0.005

1.749

0.012

748.977

n.d.

185.622

  

734.685

45.116

50.618

Core

TIMS

9.5

1.535

0.011

1.496

0.010

1.722

0.016

n.d.

n.d.

n.d.

  

753.560

48.794

54.186

Core

MC-ICP-MS

9.53

2.468

0.012

1.471

0.009

1.671

0.014

699.066

n.d.

188.557

  

771.862

48.140

53.557

Core

MC-ICP-MS

9.57

1.973

0.007

1.458

0.004

1.659

0.011

864.717

n.d.

268.411

  

781.815

44.345

49.861

Core

MC-ICP-MS

10

5.664

0.020

1.459

0.004

1.661

0.011

883.621

n.d.

291.562

  

781.164

44.799

50.307

Core

TIMS

10

1.117

0.007

1.458

0.006

1.656

0.013

750.475

n.d.

209.718

  

781.536

46.329

51.803

Core

MC-ICP-MS

10.1

1.571

0.006

1.455

0.004

1.652

0.011

761.578

n.d.

185.468

  

783.922

44.360

49.875

Core

TIMS

10.6

1.645

0.010

1.149

0.012

1.183

0.011

435.960

283.978

75.704

  

1179.479

71.728

74.894

Core

TIMS

11.15

7.789

0.045

1.174

0.006

1.261

0.010

n.d.

n.d.

n.d.

  

1125.141

53.120

58.291

Core

TIMS

11.5

1.831

0.015

1.178

0.006

1.259

0.022

n.d.

n.d.

n.d.

  

1116.678

53.232

58.397

Core

TIMS

12.3

1.711

0.009

1.131

0.007

1.168

0.011

485.095

n.d.

87.368

  

1225.640

62.363

66.745

Core

TIMS

12.4

0.960

0.006

1.171

0.006

1.199

0.009

392.544

58.195

38.423

  

1130.691

54.714

59.780

Core

MC-ICP-MS

12.52

0.810

0.003

1.133

0.005

1.208

0.014

n.d.

n.d.

n.d.

  

1219.197

54.596

59.670

Core

MC-ICP-MS

12.55

0.699

0.003

1.134

0.007

1.212

0.014

n.d.

n.d.

n.d.

  

1216.019

60.719

65.272

Core

MC-ICP-MS

12.6

0.957

0.004

1.141

0.005

1.198

0.010

633.671

n.d.

163.217

  

1197.528

55.260

60.287

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