Ross Sea Region Soil Sites

762000

762

13-Jan-1994

IBC,GGC,MRB,DSS

Wright Valley near Lake Vanda

SITE KEY

SITE NO

REASON SAMPLED

DATE RECORDED

AUTHORS

LiCl soil leaching experiment

DESCRIPTION

not recorded

MAP / SURVEY

CS Pro & Lscp

PHOTO RECORD

161.6500

-77.5217

LAT / LONG

77deg 31.3'S

-161deg -39.0'E

[ Lat/Long (deg)

]

cf. Notes for DESCR below

ALTITUDE (m)

GEOLOGICAL

SETTING

SLOPE (deg)

ASPECT

200

cf. Notes for GEOLAND below

(8o)

TEMPERATURE (degC)

DEPTH (cm)

Xerous; no readily available source of water; there may be occasional flows from associated

fan surfaces with possibly some occasional subsurface moisture flows

SOIL MOISTURE STATUS

-23

Est MAT (degC)

Central Mountain

SOIL CLIMATE ZONE

Fine gravelly sand from fan sediments with lake edge reworking

SOIL PARENT MATERIAL

None observed

BIOLOGICAL ACTIVITY

A broad weakly developed rectangular net pattern with shallow troughs, predominantly sand filled

PATTERNED GROUND

SURFACE WEATHERING or

SURFACE FEATURES

The surface has a weakly developed pebble pavement with occasional cobble clasts; there is little surface staining; larger clasts show some abrasion and

moderate ventifaction

PREVIOUS DISTURBANCE

Not previously disturbed apart from some occasional foot trafficking

PROFILE DESCRIPTION

762a 0-5cm

101

light yellowish brown to light olive brown (2.5Y 6/4-5/4) pebbly sand

Part

102

moist

Part

103

loose,

Part

762b 5-10cm

201

light yellowish brown to light olive brown (2.5Y 6/4-5/4) pebbly sand

Part

202

moist, loose

Part

762c 10-15cm

301

light yellowish brown to light olive brown (2.5Y 6/3-5/4) pebbly sand

Part

302

moist, loose

Part

762d 15-20cm

401

light yellowish brown to light olive brown (2.5Y 6/3-5/4) pebbly sand

Part

402

slightly moist

Part

403

loose

Part

762e 20-25cm

501

pale olive (5Y 6/3) granular sand

Part

502

loose,

Part

762f 25-30cm

601

pale olive (5Y 6/3) granular sand

Part

602

loose

Part

762g 30-35cm

701

pale olive (5Y 6/3) granular sand

Part

702

loose 40cm from the wetted zone

Part

762h 0-5cm

801

pale olive (5Y 6/3) pebbly sand

Part

802

loose,

Part

762i 5-10cm

901

pale olive (5Y 6/3) pebbly sand

Part

902

loose,

Part

762j 10-15cm

1001

pale olive (5Y 6/3) pebbly sand

Part

1002

loose,

Part

762k 15-20cm

1101

pale olive (5Y 6/3) pebbly sand

Part

1102

loose

Part

Yes (IGNS)

SAMPLES

a,b,c,d,e,f,g,h,i,j,k

Med

a,b,c,d,e,f,g,h,i,j,k

Med

Dry frozen

FROZEN TYPE

FROZEN GROUND DEPTH(cm)

SOIL WEATHERING STAGE

Notes:

Descr

On the north side of Lake Vanda, opposite and north of Vanda Station on a broad even sloping lake bench/fan surface about 200m from the lake edge; two sites

were established across the slope and approximately 20m apart and were marked by pegs; the sites are adjacent 1 metre square plots onto which LiCl (3 plots)

and H2O (1 plot) were irrigated; the plots will be sampled at intervals in subsequent years to determine the rate of movement of LiCl from or within the plots and

to compare the rates of movement with that found for a similar experiment at Scott Base; this site was from the edge of one of the plots that had LiCl added

Geoland

The site lies within the zone of lake benches formed by former rises in level of Lake Vanda and the deposits are probably lake sediments that have been resorted

from fan gravels and older glacial till deposits; reworking of the sediments takes place primarily by gentle wave action during periods when there has been

seasonal thawing of the lake margin; periodic low energy flows from nearby fans may have contributed some sediment; the sediments are primarily fine gravelly

sands

Seive

Size

Vol. Moisture

Drill Vol

Vol. Moisture

(BD=2)

Soluble Salt

Concentration

Gravimetric

Moisture

Particle

Size

Dry Bulk

Density

Bulk

Density

Base

(cm)

Top

(cm)

Depth

description

Sample

name

Sample

Key

Physical Data:

76200001

762a

0-5cm

91.00

1.89

none

76200002

762b

5-10cm

84.00

1.14

none

76200003

762c

10-15cm

87.00

1.89

none

76200004

762d

15-20cm

81.00

1.53

none

76200005

762e

20-25cm

92.00

0.35

none

76200006

762f

25-30cm

84.00

0.37

none

76200007

762g

30-35cm

none

76200008

762h

0-5cm

62.00

0.23

none

76200009

762i

5-10cm

93.00

0.43

none

76200010

762j

10-15cm

85.00

0.41

none

76200011

762k

15-20cm

94.00

0.35

none

Notes

Grav.

M. Cont

Fe2O3

Part. Size

<0.002

Part. Size

0.02-0.002

Part. Size

0.05-0.02

Part. Size

0.1-0.05

Part. Size

0.25-0.1

Part. Size

0.5-0.25

Part. Size

2-0.5

Part. Size

<2mm

Sample

Key

Particle Size:

76200002

84.00

22.90

42.40

27.80

3.60

1.70

1.40

0.10

1.14

76200003

87.00

19.30

43.30

30.40

3.10

1.10

2.40

0.40

1.89

76200004

81.00

22.40

44.90

26.60

3.00

1.20

1.50

0.30

1.53

76200001

91.00

18.90

44.40

29.90

3.00

1.50

1.90

0.40

1.89

76200005

92.00

20.90

44.10

30.40

2.60

0.80

1.00

0.20

0.35

76200006

84.00

26.10

36.20

29.20

5.20

2.10

1.10

0.10

0.37

76200007

81.00

18.30

38.60

32.00

6.10

2.90

1.80

0.30

0.44

76200008

62.00

20.10

32.10

33.50

8.70

3.60

1.50

0.40

0.23

76200009

93.00

13.50

38.00

34.30

7.20

4.00

2.40

0.60

0.43

76200010

85.00

19.40

37.10

30.20

6.70

3.20

2.30

1.00

0.41

76200011

94.00

14.30

45.70

31.80

4.80

1.50

0.90

1.00

0.35

Notes

NO3

meq/100g

SO4

meq/100g

mmho/cm

Solution Chemistry:

Sample

Key

76200002

8.10

0.32

76200003

7.60

0.34

76200004

7.80

0.52

76200001

7.70

0.64

76200005

7.80

0.28

76200006

7.80

0.28

76200007

8.50

0.28

76200008

8.60

0.50

76200009

8.30

0.81

76200010

8.50

0.77

76200011

9.80

0.42

CAL

FLD

QTZ

FE -

CHL

HIV

ICHL

HIV -

IHM

MICA

Notes

Sample

Key

Clay Mineralogy:

76200002

76200003

76200004

76200001

76200005

76200006

76200007

76200008

76200009

76200010

76200011

12-Dec-2005

Printed on:

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