266 1. 1. Krolenko 



A single section group in the course of a field period (lasting 180 working 

 •days) surveyed quantitatively an area of 776 km^ (the distance between the 

 profiles from 600 to 1000 m). Ten structures were mapped in the Kerch 

 and three on the Taman peninsula. 6000 loop vectors were measured 

 mth an octagonal arrangement, d = 100 m, AB = 200 m. The work cost 

 350,000 roubles. 



In conclusion, w^e will consider which production problems confront the 

 loop method at the present time and the possibiHties for its development 

 in surveying. 



The results of studies by the loop method under complex conditions of 

 dislocated, homogeneous and anisotropic deposits, covered by alluvia, were 

 confirmed in most cases by geological surve3dng, by cartographic driUing 

 and partially by seismic exploration. This means that the method can be 

 considered as the first stage in a semi-quantitative co-ordinated exploration of 

 buried structures under the conditions mentioned above. 



The first objects of exploration by the loop method should be regions 

 which are unfavourable for other methods. In other words, lithologically 

 homogeneous sections, which do not have clear marker horizons and are 

 poorly exposed. When planning subsequent geological surveying and drilhng 

 in these areas, there should be a sparse network of trial shafts and cartogra- 

 phic bore-holes, and the investigation should be concentrated in the zones of 

 local upfolds, variations of axial plunge, secondary com,plications and in 

 zones of merging of the structures, all of which are indicated on the map 

 \\ith the aid of the loop method. 



If the surface and deep tectonics correspond, a similar method also ap- 

 plies to problems of planning seismic exploration and deep drilling. An im- 

 portant role is then played by the combined use of the loop method and 

 seismic exploration. Carrying out these measures makes it possible to reduce 

 the bulk of expensive geological surveying and seismic exploration, and to 

 improve the extent to which the deposit is studied. 



A successful application of the loop method in the Crimea, Dagestan, 

 the Taman' peninsula and in the Turkmenia indicate that it was essential 

 to continue this work in these regions. Thus, in the Taman' the loop method 

 only covered the western and central part of the peninsula, in the eastern 

 part and further along the southern edge of the Kuban depression, sur- 

 veying was not carried out, although in combination with seismic explora- 

 tion this work would be of practical interest. 



In Turkmenia and to the south of Kazakhstan, the loop method could 

 be used for surveying and mapping of buried structures on the western 

 depression of Kopetdag and in north-western Tudakyr and Kaplankyr. 



