Browse Data | 1992 - Vanda Station

Site Information

Site number:
707
Authors:
IBC, GGC
Date recorded:
1993/01/02
Reason Sampled:
soil moisture investigation of lake edge wetting front
Description:
80 m southwest of the Vanda Station Mess building on the small island on which the two disused helo pads are located, 5.4m from the lake edge; this site is 1.5m downslope from site 706 and is at the edge of the wetting fringe
Altitude:
92 m
Aspect:
SE
Slope:
7 °
Location Data
Observer GGC IBC
GPS No
Latitude Longitude DMS 77° 0.0' S 161° 40.0' E 75° 50' S 166° 45' E
Latitude Longitude DD -77.000 161.667 -75.83 166.75
Latitude longitude precision DD 0.008 0.008 0.08 0.04
Locality Vanda Station, Wright Valley at the eastern end of Lake Vanda
Survey not recorded

Climate

Soil climate zone:
coastal mountain
Estimated mean annual temperature:
-20 °C
Frozen ground depth:
35 ~
Frozen type:
dry frozen
Frozen comment:
~35

Geology

Geological setting:
the rocks of the area are granodiorites that have been cut with lamprophyre dykes and form a strongly undulating ridge and gully topography as a result of ice over riding from down-valley and up-valley glaciations and to a lesser extent, subaerial weathering; subsequent to glaciation, the terrain has been subjected to drowning and emergence from fluctuating lake levels from Lake Vanda with some sorting or resorting of surficial materials
Patterned ground:
Surface weathering or surface features:
surface clasts are mainly angular and unstained

Soil

Soil parent material:
fractured, mainly lamprophyre dyke rock forming a sandy gravel mantle
Previous disturbance:
a relatively undisturbed site apart from treking
Soil weathering stage:
6 1 (Campbell & Claridge 1975)
Soil moisture status:
xerous; the soil surface has become slightly moist from the capillary movement of water from the edge of Lake Vanda
Biological activity:
Profile Description
HorizonDepthDescription
707a 0 – 10 cm pale yellow to light yellowish brown (2.5Y 7/4-6/4) gravelly sand; loose; slightly moist; rock particles angular and unstained; indistinct boundary,
707b 10 – 20 cm pale yellow to light yellowish brown (2.5Y 7/4-6/4) pebbly sandy gravel; loose; slightly moist; rock particles angular and unstained; indistinct boundary,
707c 20 – 30 cm pale yellow (2.5Y 7/4) pebbly gravel; loose; slightly moist; rock particles angular and unstained; indistinct boundary,
707d 30 – 40 cm light grey (2.5Y 7/2) pebbly sandy gravel; loose; moist; rock particles angular and unstained; indistinct boundary,
707e 40 – 50 cm light grey (2.5Y 7/2) pebbly sandy gravel; loose; moist; rock particles angular and unstained; indistinct boundary, on moist fragmented bedrock.

Sample Data

Physical Data
Sample nameDepth descriptionTop (cm)Base (cm)Bulk DensityDry Bulk DensityGravimetric MoistureVol. Moisture (BD=2)
707a 0-10 0 10 1.2
707b 10-20 10 20 1.9
707c 20-30 20 30 1.9
707d 30-40 30 40 2.8
707e 40-50 40 50 5.8
Sample solution chemistry
Sample namepHNa meq/100gCa meq/100gMg meq/100gK meq/100gCl meq/100gSO4 meq/100gNO3 meq/100gEC mmho/cmSoluble SaltNotes
707a 8.24 1.1 3.3 1.0 0.2 4.0 1.6 0.01 1.24 .  
707b 8.18 0.4 1.7 0.4 0.1 2.3 0.4 0.005 0.664 .  
707c 8.25 0.4 2.8 0.6 0.1 3.7 0.1 0.006 0.808 .  
707d 8.42 0.3 3.3 0.5 0.1 4.9 0.3 0.002 1.057 .  
707e 8.61 0.2 1.7 0.3 0.06 2.0 0.2 0.002 0.54 .  
Particle size distribution
Sample name< 2 mm2 - 0.5 mm0.5 - 0.25 mm0.25 - 0.1 mm0.1 - 0.05 mm0.05 - 0.02 mm0.02 - 0.002 mm< 0.002 mmFe2O3CaCO3Notes
707a 1.2 11.2 43.5 30.7 3.2 1.2 3.6 3.5 . .
707b 1.9 13.9 43.6 30.7 3.2 1.2 3.6 3.5 . .
707c 1.9 12.6 41.8 33.1 3.2 1.2 3.2 4.6 . .
707d 2.8 13.5 40.5 32.3 3.7 1.5 3.4 5.0 . .
707e 5.8 16.0 41.1 26.4 3.2 1.8 5.1 6.2 . .
Clay Mineralogy
Sample nameMicaIHMHIV - IHMICHLVTHIVCHLSMCHL SMFE - CHLHTQTZFLDHBCALNotes
707a :
707b :
707c :
707d :
707e :

Photos

Photo record:
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