CHITALIN, A. F., N. V. IRINARKHOVA, and M. A. STOR, Moscow State University, Moscow, Russia

ABSTRACT: Structural Control of Oil and Gas Deposits in Southwest Gissar and Tadzhik Depression

Computer analysis of the space image (scale 1:1,000,000) has been done for the Surkhandar'ya part of the Tadzhik depression and southwest Gissar region using a program of automatic apportionment and statistical analysis of lineaments. The lineaments correspond to faults in the Paleozoic basement of the depression, and to faults and joint systems in the overlying deformed Mesozoic-Cenozoic cover. Oil and gas deposits occur both in the crests of folds in the cover and in subthrust structures, which occur at the intersection of different trends of lineaments. The deposits are localized in the zones of intersecting trends. We suggest that the migration of hydrocarbons from basement rocks toward the anticlinal culminations was controlled by the fault zones and joint

systems. The most prospective areas are the zones of west-northwest and northwest extension, which trend at right angles to the fold axes.

AAPG Search and Discovery Article #90990©1993 AAPG International Conference and Exhibition, The Hague, Netherlands, October 17-20, 1993.