Karachaganak Field, Northern Pre-Caspian Basin, Northwestern Kazakhstan

2003 ◽  
pp. 237-250
Keyword(s):  
Caspian Basin

TO THE PROBLEM OF PRACTICABILITY OF CHANGING FISHERIES MEASURES FOR COMMERCIAL CATCHES OF ROACH AND SHEATFISHIN THE VOLGA-CASPIAN BASIN (THE ASTRAKHAN REGION)

2018 ◽  
pp. 7-13
Author(s):  
Vitaliy Victorovich Barabanov ◽  
Gennadij Grigor'evich Kolosyuk
Keyword(s):  
Retrospective Analysis ◽  
Caspian Basin ◽  
Commercial Catch ◽  
Reproductive Part ◽  
Fish Catch

Fisheries measures is an instrument allowing to regulate fish catch pressing to the aquatic bio-resources stocks. Roach and sheatfish are the species which are exploited in industrial and amateur fisheries of the Volga-Caspian basin (the Astrakhan region). According to the Fishery Regulations, today the minimum allowable length for roach is 17 centimeters, and for sheatfish it is 60 centimeters. According to the results of retrospective analysis of stocks dynamics, commercial catch of roach and cheatfish, experience in changing fisheries measures for roach and sheatfish in the Volga-Caspian basin, changing fisheries measures for these species has been found inexpedient. The current fisheries measures for commercial catch of roach allows to exploit only the reproductive part of the population, minimizing losses of restocking. Also, the work shows that a change of fisheries measures for sheatfish will lead to the decrease of the commercial catch of sheatfish and objects of its ration. In general, it must be stressed that changing fisheries measures will lead to redistribution of roach and sheatfish catches between the main participants (commercial fishers, amateur fishers and poachers), but not in favor of the official fish catching

scholarly journals Crustal density structure of the northwestern Iranian Plateau

2019 ◽  
Vol 56 (12) ◽  
pp. 1347-1365 ◽  
Author(s):  
Vahid Teknik ◽  
Abdolreza Ghods ◽  
Hans Thybo ◽  
Irina M. Artemieva
Keyword(s):  
High Density ◽  
Central Iran ◽  
P Wave ◽  
Arabian Plate ◽  
Scale Model ◽  
Moho Depth ◽  
Caspian Basin ◽  
The South ◽  
South Caspian Basin ◽  
Iranian Plateau

We present a new 2D crustal-scale model of the northwestern Iranian plateau based on gravity–magnetic modeling along the 500 km long China–Iran Geological and Geophysical Survey in the Iranian plateau (CIGSIP) seismic profile across major tectonic provinces of Iran from the Arabian plate into the South Caspian Basin (SCB). The seismic P-wave receiver function (RF) model along the profile is used to constrain major crustal boundaries in the density model. Our 2D crustal model shows significant variation in the sedimentary thickness, Moho depth, and the depth and extent of intra-crustal interfaces. The Main Recent Fault (MRF) between the Arabian crust and the overriding central Iran crust dips at approximately 13° towards the northeast to a depth of about 40 km. The geometry of the MRF suggests about 150 km of underthrusting of the Arabian plate beneath central Iran. Our results indicate the presence of a high-density lower crustal layer beneath Zagros. We identify a new crustal-scale suture beneath the Tarom valley between the South Caspian Basin crust and Central Iran and the Alborz. This suture is associated with sharp variation in Moho depth, topography, and magnetic anomalies, and is underlain by a 20 km thick high-density crustal root at 35–55 km depth. The high-density lower crust in Alborz and Zagros may be related to partial eclogitization of crustal roots below about 40 km depth. The gravity and magnetic models indicate a highly extended continental crust for the SCB crust along the profile. Low observed magnetic susceptibility of the Kermanshah ophiolites likely indicates that the ophiolite rocks only form a thin layer that has been thrust over the sedimentary cover.

Formation of populations of Acipenseridae sturgeons in the Volga-Caspian basin

2014 ◽  
Vol 54 (8) ◽  
pp. 576-583 ◽  
Author(s):  
R. P. Khodorevskaya ◽  
V. A. Kalmykov
Keyword(s):  
Caspian Basin

GEOCHEMICAL CONDITIONS OF OIL AND GAS FORMATION IN THE SUBSALT BEDS OF THE SOUTHWESTERN CASPIAN BASIN

1984 ◽  
Vol 26 (7) ◽  
pp. 803-809
Author(s):  
G. P. Bylinkin ◽  
O. K. Navrotskiy ◽  
I. N. Sidorov ◽  
I. V. Oreshkin
Keyword(s):  
Oil And Gas ◽  
Caspian Basin ◽  
Geochemical Conditions ◽  
Gas Formation
Sign in / Sign up

Export Citation Format

Share Document