Ross Sea Region Soil Sites
763000
763
13-Jan-1994
IBC,GGC,MRB,DSS
Wright Valley near Lake Vanda
LiCl soil leaching experiment
not recorded
CS Pro & Lscp
No
161.6500
-77.5217
77deg 31.3'S
-161deg -39.0'E
cf. Notes for DESCR below
8
S
200
cf. Notes for GEOLAND below
(8o)
| Xerous; no readily available source of water; there may be occasional flows from associated |
| fan surfaces with possibly some occasional subsurface moisture flows |
-23
Central Mountain
Fine gravelly sand from fan sediments with lake edge reworking
None observed
A broad weakly developed rectangular net pattern with shallow troughs, predominantly sand filled
| 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 |
Not previously disturbed apart from some occasional foot trafficking
763a 2-0cm
101
surface pebble pavement
102
subangular moderately ventifiorm dolerite and subangular granodiorite
103
763b 0-5cm
201
pale olive (5Y 6/3) gravelly sand
202
loose,
763c 5-10cm
301
pale olive gravelly sand, loose,
763d 10-15cm
401
pale olive gravelly sand, loose,
763e 15-20cm
501
pale olive (5Y 6/3) gravelly sand
502
weakly cohesive,
763f 20-25cm
601
pale olive (5Y 6/3) gravelly sand
602
weakly cohesive
Yes (IGNS)
a,b,c,d,e
Dry frozen
0
1
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 on which H20 only had |
| been 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 |
| Soluble Salt |
| Concentration |
76300001
763a
2-0cm
-2
0
none
76300002
763b
0-5cm
0
5
83.00
1.28
none
76300003
763c
5-10cm
5
10
91.00
2.06
none
76300004
763d
10-15cm
10
15
88.00
2.27
none
76300005
763e
15-20cm
15
20
86.00
0.98
none
76300006
763f
20-25cm
20
25
86.00
0.38
none
76300001
83.00
18.90
39.70
34.20
5.20
1.30
0.40
0.30
1.28
76300002
91.00
17.00
42.00
33.70
4.80
1.40
0.60
0.50
2.06
76300003
88.00
30.10
36.50
25.70
3.70
1.60
1.80
0.70
2.27
76300004
86.00
22.80
41.00
28.20
4.90
1.60
1.10
0.40
0.98
76300005
86.00
23.70
40.40
27.90
5.00
1.50
1.00
0.50
0.38
76300001
9.10
0.17
76300002
9.00
0.35
76300003
8.20
0.40
76300004
7.90
0.51
76300005
8.20
0.40
76300001
76300002
76300003
76300004
76300005
12-Dec-2005
Page 740 of 896
763
