During the season works of the 9th (2004) and 10th (2005) Ukrainian Antarctic expeditions workers of the Institute of geophysics NASU on the islands of Argentine archipelago measuring of the gravitational field at 17 points were conducted. Scheme of the observation points placing is given in fig. 1. British Antarctic Service has already performed works on the creation of bearing gravimetric points’ network, which is situated on the area with coordinates between southern latitudes of 51 and 71 degrees (Renner, 1982). In the area, which borders station “Academic Vernadsky” there are 16 bearing gravimetric points, two of which are situated on Galindez Island. All measuring were performed with one of them (VS01) taking into account, where gravitation force angle is 982339,6 mGal (Renner, 1982). Results of the field observations are given in table 1. Gravitation force abnormalities are obtained through the use of International formula of the normal Earth field 1930 with Potsdam system’s amendment. Map of abnormalities in the free air (Δgс.в.) of the Argentine islands region is given in fig.1. Value of Δgс.в., which were obtained as a result of field works, absolutely fall in with regional field of the research region, which confirms the high quality of these works.
№
|
Point’s name |
Geographical coordinates
|
Absolute value, mGal
|
Height (m)
|
Abnormality in the free air |
Bouguer abnormality |
|
Latitude
|
Longitude
|
||||||
1
|
GS-30
|
-64,07877417
|
-65,15790834
|
982360,86
|
18,226
|
66,68
|
64,65
|
2
|
GS-40
|
-64,07475466
|
-65,20767627
|
982340,275
|
18,173
|
46,36
|
44,34
|
3
|
GS-50
|
-64,13603279
|
-65,1749509
|
982349,8
|
17,519
|
51,32
|
49,37
|
4
|
GS-60
|
-64,0920
|
-65,1409
|
982339,27
|
25,9396
|
46,5
|
43,6
|
5
|
GS-70
|
-64,08327785
|
-65,24750238
|
982334,31
|
17,036
|
39,44
|
37,54
|
6
|
GS-80
|
-64,07031
|
-65,16022
|
982332,305
|
20,906
|
39,55
|
37,23
|
7
|
GS-90-а
|
-64,1846
|
-65,3370
|
982330,925
|
22,121
|
30,40
|
27,94
|
8
|
GS-110
|
-64,1118669153
|
-65,1259208263
|
982354,615
|
17,11
|
56,73
|
55,82
|
9
|
GS-120
|
-64,21801164
|
-65,23468524
|
982340,694
|
18,934
|
36,81
|
34,70
|
10
|
GS-130
|
-64,22176364
|
-65,23976194
|
982341,914
|
23,078
|
39,05
|
36,47
|
11
|
GS-200
|
-64,27407679
|
-65,23688375
|
982339,875
|
18,595
|
31,91
|
29,84
|
12
|
GS-230
|
-64,27902489
|
-65,24379049
|
982339,32
|
17,532
|
30,67
|
28,72
|
13
|
GS-240
|
-64,3174766
|
-65,23923264
|
982339,41
|
18,503
|
28,33
|
26,27
|
14
|
GS-250
|
-64,30787211
|
-65,239728
|
982370,755
|
16,818
|
29,84
|
27,97
|
15
|
GS-260
|
-64,31717175
|
-65,2357799
|
982339,885
|
17,819
|
28,62
|
26,64
|
16
|
GS-310
|
-64,3976
|
-65,5112
|
982340,035
|
17,305
|
51,12
|
49,19
|
17
|
VS01
|
-64,153
|
-65,147
|
982339,2
|
9,076
|
36,90
|
35,9
|