�������� ����� ��

Origin of calcareous dust in Argentinean Pleistocene periglacial depositstraced by Sr, C and O isotopic compositions, and REE distribution

Isabelle Techer, Norbert Clauer, Thea Vogt

PII: S0009-2541(14)00222-8DOI: doi: 10.1016/j.chemgeo.2014.04.024Reference: CHEMGE 17218

To appear in: Chemical Geology

Received date: 21 October 2013Revised date: 17 April 2014Accepted date: 21 April 2014

Please cite this article as: Techer, Isabelle, Clauer, Norbert, Vogt, Thea, Originof calcareous dust in Argentinean Pleistocene periglacial deposits traced by Sr, Cand O isotopic compositions, and REE distribution, Chemical Geology (2014), doi:10.1016/j.chemgeo.2014.04.024

This is a PDF file of an unedited manuscript that has been accepted for publication.As a service to our customers we are providing this early version of the manuscript.The manuscript will undergo copyediting, typesetting, and review of the resulting proofbefore it is published in its final form. Please note that during the production processerrors may be discovered which could affect the content, and all legal disclaimers thatapply to the journal pertain.

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

σ

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

σ

σ ≤

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

σ

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

Sample identification

Geographic parameters

Host material Sample depth Carbonate estimated age miscellaneous observations

thickness (m) (cm) content (%) (in Ka BP)

Pampa de Castillo

45°45'40’’S; 68°36’08’’W; 700m altitude

>3 m alluvium 1020 - 1170 bedrock = "Patagonian shingle"

PC1 -200 30

PC2 60

Meseta de Montemayor

43°48'58’’S; 65°45'09’’W; 272m altitude

10 m alluvium 130 - 200 "Patagonian shingle"

MM1 -200 50

MM2 -100 50

Puerto Madryn 42°45'08’’S; 65°02’56’’W; 90m altitude

>3 m alluvium bedrock : Miocene sandstone

PMT Miocene sandstone

PM1 -60 upper calcrete

PM2 -100 22

PM3 -250 27 apex of a wedge

PM4 -200 27

PM5 -300 36.5 apex of a wedge

Rio Gallegos 51°37’17’’S; 69°13'08’’W; 20m altitude

>1.5m alluvium 14.8-12.6 bedrock = "Patagonian shingle"

RG1

RG2

El Durazno 36°44'13’’S; >3 m alluvium 1800 - 1020

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

65°17'18’’W; 370m altitude

ED1 -250 30

Valle de Hucal 37°50'15’’S; 64°15'05’’W; 260m altitude

>2 m alluvium 600-400

VH1 -50

VH2 -70

Carapacha Chica

37°30'S; 66°10'W; 260m altitude

>3 m gelifluction

600-400 bedrock = Permian arkoses

CC1 -150

CC2 -50

Late-Glacial sands

sands 0 < 18

S1 36º 56'22’’S; 65º18'W; 405m altitude

S2 37º03'37’’S; 65º12’W; 371m altitude

S3 37°21’55’’S; 64°31'W; 222m altitude

Paramillo de Uspallata

33°S, 69°W; 3200-2700m altitude

>2 m gelifluction

< 1800

PU1 -100

PU3 -60

PU4 -90

PU5 present-day -30

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

soil

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

Mg Ca Fe Mn Na K P Sr Ca/Sr Si/Ca (10-5

mol.L-1) (10-5

mol.L-1) (10-5

mol.L-1) (10-5

mol.L-1) (10-5

mol.L-1) (10-5

mol.L-1) (10-5

mol.L-1) (10-3

mmol.L-1) (mol/mmol) (10-4)

22.4 875.0 0.036 0.018 4.04 0.33 1.26 3.27 2.67 14.2

8.52 65.09 0.018 0.018 2.04 0.31 1.19 1.73 3.76 14.8

11.1 690.8 - 0.016 18.3 - - 3.47 1.99 10.3

26.3 2027.4 - 0.025 10.4 - - 8.96 2.26 5.27

1.15 5.11 0.054 0.018 33.6 0.54 0.16 10.5 0.49 -

19.8 673.3 0.054 0.036 4.30 3.09 0.16 4.32 1.56 5.81

22.9 875.3 0.036 0.036 7.08 1.53 0.19 4.02 2.18 7.72

12.3 1042.4 0.054 0.018 29.4 0.84 - 3.17 3.28 -

18.9 1067.3 0.143 - 43.9 0.08 - 6.71 1.59 6.34

19.0 985.0 0.072 - 24.4 1.66 - 5.37 1.84 7.59

44.9 588.5 0.358 0.073 6.87 1.56 1.45 5.55 1.06 18.1

48.1 613.5 0.233 0.055 5.74 1.94 0.71 4.86 1.26 18.0

58.4 428.9 0.043 1.676 4.35 0.06 3.87 7.27 0.59 415

27.6 2394.0 0.753 0.346 4.35 5.88 - 10.5 2.27 8.92

46.5 2917.7 0.986 0.328 5.65 - - 15.6 1.87 6.10

23.0 2593.5 0.663 0.237 9.13 - - 12.5 2.08 6.86

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

20.2 2157.1 0.323 0.091 43.9 - - 5.27 4.09 14.9

37.9 106.2 0.394 0.346 8.26 28.6 - 2.76 0.38 905

34.6 72.1 0.287 0.164 6.52 21.0 - 2.42 0.30 988

18.5 86.5 0.269 0.346 - 18.7 - 2.40 0.36 781

13.5 2967.6 0.538 0.291 5.65 2.81 1.81 3.79 7.83 11.2

16.8 4015.0 0.466 0.073 3.91 2.56 3.61 5.00 8.05 10.2

14.4 3184.5 0.860 0.091 3.04 1.79 2.68 5.82 5.47 19.4

6.1 246.1 0.502 0.364 0.87 4.09 1.13 1.54 1.60 171

10.3 266.8 0.538 0.947 1.57 2.81 - 0.65 4.13 6.67

135.0 214.5 292.5 5.792 30.4 629.2 8.71 21.2 0.10 -

1.2 104.7 0.344 1.444 1.30 2.30 0.33 0.68 1.55 51.0

218.9 436.4 445.0 14.08 82.6 422.0 22.9 68.7 0.06 351

4.1 30.7 0.040 0.109 0.74 6.68 1.39 0.59 0.52 255

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

Sample #

altitude

depth

La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Total

(m) (cm) (g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

(g/g)

Pampa del Castillo

PC1 700 -200 4.90 3.00 1.09 5.30 1.12 0.22 1.42 0.20 1.26 0.28 0.83 0.11 0.72 0.11 20.56

PC2 700 2.90 1.10 0.70 3.10 0.71 0.15 0.88 0.13 0.67 0.16 0.46 0.07 0.40 0.07 11.50

Montemayor

MM1

275 -200 8.03 1.47 1.69 7.25 1.35 0.27 1.32 0.17 0.99 0.20 0.63 0.09 0.50 0.08 25.04

MM2

275 -100 5.82 5.39 1.48 6.41 1.33 0.29 1.39 0.18 1.10 0.21 0.64 0.08 0.52 0.08 24.92

Puerto Madryn

PMT 90 -100 0.02 0.03 bdl bdl bdl bdl bdl 0.01 bdl bdl bdl bdl bdl bdl > 0.06

PM1 90 -5 2.51 2.80 0.68 3.06 0.64 0.14 0.68 0.11 0.55 0.11 0.32 0.04 0.26 0.04 11.94

PM2 90 -45 2.26 2.33 0.62 2.80 0.61 0.14 0.66 0.11 0.57 0.12 0.35 0.05 0.30 0.05 10.9

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

7

PM3 90 -100 5,00 0.63 0.92 3.94 0.76 0.15 0.93 0.16 0.98 0.23 0.75 0.11 0.81 0.14 15.51

PM4 90 -150 4.73 1.43 1.17 5.21 1.05 0.21 1.14 0.18 0.96 0.20 0.60 0.08 0.55 0.09 17.60

PM5 90 -300 2.66 1.19 0.68 2.96 0.60 0.11 0.62 0.10 0.51 0.10 0.30 0.04 0.25 0.04 10.17

Rio Gallegos

RG1 20 -40 9.49 11.9 3.15 16.4 3.98 0.91 4.33 0.63 3.36 0.66 1.88 0.23 1.48 0.23 58.63

RG2 20 -30 12.4 18.5 4.28 21.3 5.14 1.17 5.42 0.79 4.28 0.82 2.34 0.29 1.88 0.29 78.90

El Durazno

ED1 365 2.41 1.72 0.65 3.08 0.65 0.12 0.67 0.08 0.46 0.10 0.28 0.05 0.31 0.05 10.63

Valle de Hucal

VH1 260 -10 14.4 17.4 4.08 17.6 3.81 0.80 3.88 0.54 3.31 0.66 2.01 0.28 1.88 0.29 70.94

VH2 260 -10 9.31 10.8 2.39 10.2 2.17 0.43 2.15 0.31 1.93 0.41 1.25 0.18 1.18 0.19 42.90

Carapacha

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

Chica

CC1 260 -10 19.2 11.0 4.98 21.6 4.58 0.93 4.64 0.63 3.77 0.74 2.20 0.30 1.94 0.29 76.80

CC2 260 -10 13.5 2.33 2.53 11.2 2.28 0.49 2.79 0.39 2.45 0.54 1.67 0.23 1.60 0.25 44.35

Post-Würmian sands

S1 397 2.15 1.02 0.56 2.58 0.55 0.11 0.54 0.07 0.36 0.07 0.19 0.03 0.17 0.03 8.43

S2 334 2.03 0.85 0.53 2.37 0.54 0.11 0.57 0.08 0.36 0.08 0.20 0.04 0.15 0.04 7.95

S3 222 2.22 2.36 0.62 2.90 0.67 0.13 0.67 0.09 0.49 0.09 0.28 0.03 0.22 0.03 10.80

DAC1

3000

-320 2.36 1.77 0.54 2.51 0.67 0.34 1.05 0.25 1.92 0.48 1.59 0.23 1.55 0.23 15.49

DAC1 WR

3000

-320 233 489 60 235 40 12 37 4.3 23 4.45 14.2 1.92 bdl 1.99 1157

DAC2

3000

-320 5.10 10.4 1.35 5.96 1.16 0.43 1.14 0.15 0.73 0.14 0.40 0.05 0.36 0.06 27.43

DAC2 WR

3000

-320 168 378 47 201 39 14 38 4.8 27 5.34 16.5 2.3 bdl 2.24 943

Soil 0.20 bdl 0.06 0.30 0.05 0.03 0.05 bdl bdl bdl bdl bdl 0.03 bdl > 0.72

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

σ

Sample ID altitude depth 87Sr/86Sr 13C

18O

(m) (cm) (+2 in 10-6) (‰ V-PDB) (‰ V-PDB)

Pampa de Castillo

PC1 700 -200 0.705567 (12.0)

PC2 700 0.705598 (3.5)

Montemayor

MM1 275 -200 0.706788 (7.0) -5.3 -5.3

MM2 275 -100 0.706724 (4.4) -4.5 -4.9

Puerto Madryn

PMT 90 -100 0.706934 (28.0)

PM1 90 -5 0.706786 (6.4)

PM2 90 -45 0.706667 (6.0)

PM3 90 -100 0.706833 (8.4) -4.2 -4.3

PM4 90 -150 -5.2 -5.9

PM5 90 -300 0.706811 (5.4)

Rio Gallegos

RG1 20 -40 0.706463 (8.2)

RG2 20 -30 0.706486 (7.4) -7.2 -2.7

El Durazno

ED1 365 0.706716 (8.2)

Valle de Hucal

VH1 260 -10 0.706773 (7.8) -5.7 -3.5

VH2 260 -10 0.706780 (8.4) -6.1 -3.8

Carapacha Chica

CC1 260 -10 0.707076 (4.2) -2.8 -3.7

CC2 260 -10 0.707058 (6.6) -1.9 -3.8

Post-Würmian sands

S1 397 0.706310 (22.0)

S2 334 0.706397 (9.0)

S3 222 0.706435 (6.2)

Paramillo de Uspalatta

PU1 3000 -120 0.707466 (4.4) -4.5 -3.2

PU3 3000 -75 0.707477 (7.4) -4.5 -2.6

PU4 3000 -45 0.707461 (4.4)

PU5 3000 -15 0.707350 (4.2)

DAC1 3000 -320 0,706758 (8.8)

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT

DAC1WR 3000 -320 0.706288 (9.0)

DAC2 3000 -320 0.705804 (6.2)

DAC2WR 3000 -320 0.705015 (3.0)

Soil 0.706691 (12.0) -1.6 -2.7

ACC

EPTE

D M

ANU

SCR

IPT

ACCEPTED MANUSCRIPT