Grigory Agranov

Lomonosov Moscow State University | MSU · Department of Dynamic Geology

It is established that faults in the sedimentary cover of the Nansen basin and seismic anomalies of the “flat spot” type associated with the methane accumulation are grouped into three spatial combinations: 1 – synchronized faults and spots, 2 – spots without faults, 3 – faults without spots. They are distributed mainly between linear magnetic anom...

It is established that faults in the sedimentary cover of the Nansen basin and seismic anomalies of the "flat spot" type, associated with methane accumulation, are grouped into three spatial combinations: (1) synchronized faults and spots, (2) spots without faults, and (3) faults without spots. They are generally distributed between the C20 and C12...

Peculiarities of the formation of marginal plateaus in the early period of the opening of the North Atlantic Ocean are considered. The oceanic opening between Greenland and Europe (formation of the North Atlantic Ocean) began approx. 50-55 Mya after a long period of rifting, followed by the formation of the Aegir spreading ridge and the formation o...

The acoustic basement of the Knipovich Ridge southeastern flank was interpreted on the time-domain CDP seismic sections and calibration of Bouguer gravity anomalies to depth was done with construction of basement structural map for the area with an oceanic crust type. On this map, to the east from Kni-povich Ridge, there is a longitudinal uplift, w...

The authors of the article studied the features of the structure formation of the earth’s crust in the early period of the formation of the Southeast Indian Ridge, associated with the separation of Australia from Antarctica and the advancement of the rift zone to the west within the ancient oceanic lithosphere towards the large magmatic province of...

The problem of the interaction of spreading ridges with large igneous provinces is widely discussed in the scientific literature. The most striking and well-preserved example of such interaction in the geological past is the “collision” of the Southeast Indian spreading ridge and the Kerguelen plateau, which occurred about 43 Maago. The consequence...

The paper analyzes the "bright spot" and "flat spot" anomalies of seismic data on the southeastern flank of the Knipovich Ridge associated with the accumulation of free gas in the sedimentary cover above the oceanic basement. The identified anomalies are associated spatially with negative values of the residual Bou-guer anomaly and positive magneti...

18.01.2022 г. После доработки 18.02.2022 г. Принята к публикации 29.04.2022 г. В работе проанализированы аномалии сейсмических данных типа "яркое пятно" и "плоское пятно" на юго-восточном обрамлении хребта Книповича, связанные с аккумуляцией свободного газа в осадочном разрезе над океаническим фундаментом. Выделенные аномалии в пространстве ассоци-...

Conjugated Diamantin and Labuan structures located in the southeastern part of the Indian Ocean were formed as a result of the split of a single Australian-Antarctic continent and the continental rift movement towards the oceanic lithosphere of the Indian Ocean. The old oceanic lithosphere rift-induced destruction resulted in the formation of a new...

The creation of the laboratory of experimental geodynamics of the Earth Science Museum history is considered in the context of geodynamics establishment of as a branch of geology. The main directions of experimental research carried out in the laboratory for the period 2015-2020 and the main results of the experiments are presented. The issues of u...

The peculiarities of the formation of the structure of the Earth’s crust in the Australian–Antarctic basin during the early break-up between Australia and Antarctica are considered. The study period encompasses long-lasting rifting (~160–80 Ma), ultraslow spreading (~80–45 Ma) with the formation of the proto-oceanic mainly ultrabasic crust, spreadi...

The paper considers geological and geophysical data on the crustal structure of the volcanic Kerguelen Plateau and nearby Indian Ocean, as well as evolution of the Kerguelen Plateau during the Gondwana breakup. It is assumed that three isolated continental blocks (microcontinents) evolved within the Kerguelen Plateau. In order to provide insight in...