Oil and gas basins of the Pacific margin of the Soviet Union: Proven and probable
- Moscow State Univ. (USSR)
The Pacific margin of the Soviet Union comprises a large number of sedimentary basins, many of rather small size, but some more extensive, of which five contain already proven hydrocarbon reserves: Sakhalin, Tartar Strait, West Kamchatka, Khatyrka, and Anadyr. The intensely folded and partly metamorphosed basement of the sedimentary basins of the region consists of Paleozoic and Mesozoic rocks, accreted in the late Mesozoic and Paleogene to the ancient, Precambrian continental blocks of Arctica (Hyerborea), Siberia, Bureya-Khanka continents and comprising Okhotsk and Central Kamchatka microcontinents. The sedimentary infill of the basin is represented mainly by terrigeneous and siliceous deposits of Late Cretaceous and, principally, of Cenozoic age, with some addition of volcaniclastic material. The thickness of sediments attains many thousands meters. By their geodynamic nature, the sedimentary basins of the Pacific margin of the Soviet Union belong to different types of basins recognized in active margin environment. Some are of the fore-arc type, among them Navarin Khatyrka, and North and East Sakhalin; others are of the back-arc type: West Kamchatka, Tartar Strait, and others. In the rear part of the margin the authors recognize the northern continuation of a huge continental rift system which includes the North China Bohai Bay and Sunliao basins. In the Soviet Union, this system comprises the Zeya-Bureya, Middle Amur, North Okhotsk, Markovo, and Anadyr basins. The basal strata of the basin's sedimentary infill, as a rule, gets younger from the mainland to the ocean. These sedimentary basins were subjected to rather moderate folding and high-angle faulting, which occurred mainly in the Pliocene and even the Pleistocene, and involved all the sequence of the basin infill. The traps are mostly structural, anticlinal or fault bounded. Reservoir rocks are represented by sandstones or fractured siliceous shales.
- OSTI ID:
- 6985606
- Report Number(s):
- CONF-900605--
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (USA), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Vol. 74:5; ISSN AABUD; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000 -- Geosciences
ASIA
CRETACEOUS PERIOD
EASTERN EUROPE
EUROPE
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOLOGIC TRAPS
MESOZOIC ERA
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
RIFT ZONES
SEDIMENTARY BASINS
USSR