Results 51 to 60 of about 4,247,994 (151)

Provenance and Uranium Source Characteristics of Red and Variegated Uranium-bearing Strata in Southern Songliao Basin and Uranium Mineralization

open access: yesYuanzineng kexue jishu
The Songliao basin, China’s largest northeastern sedimentary basin, is a key uranium basin with unique sandstone-type uranium-hosting conditions. To clarify the uranium-mineralization regularities in the southern part of the basin and locate favorable ...
XIAO Jing1, 2, GUO Qiang1, 2, QIN Mingkuan1, 2, YAN Zhanglei3, NING Jun4, LIAO Chunfu5
doaj   +1 more source

The anatomy and systematic position of the theropod dinosaur Chilantaisaurus tashuikouensis Hu, 1964 from the Early Cretaceous of Alanshan, People's Republic of China [PDF]

open access: yes, 2008
There is little consensus on the systematic position of the colossal theropod dinosaur Chilantaisaurus tashuikouensis from the Cretaceous (Aptian–?Albian or Upper Cretaceous) Ulansuhai Formation of Inner Mongolia, which has been recovered as a derived ...
Benson, R. B. J.   +3 more
core   +1 more source

Logging-Based Fracability Evaluation of Shale Oil Reservoirs in the Upper Cretaceous Qingshankou Formation, Central Daqing Placanticline, China

open access: yesApplied Sciences
Fracability serves as the dominant factor governing the recoverable conditions of shale oil reservoirs. Based on logging data from the Cretaceous Qingshankou Formation in the central Daqing Placanticline, China, combined with core experimental data ...
Yong Chen   +5 more
doaj   +1 more source

Shale oil enrichment evaluation and production law in Gulong Sag, Songliao Basin, NE China

open access: yesPetroleum Exploration and Development, 2023
Based on the results of drilling, tests and simulation experiments, the shales of the Cretaceous Qingshankou Formation in the Gulong Sag of the Songliao Basin are discussed with respect to hydrocarbon generation evolution, shale oil occurrence, and pore ...
Longde SUN   +11 more
doaj   +1 more source

Temperature-pressure history of the Cretaceous Qingshankou Formation and its relationship with Gulong shale oil enrichment in the northern Songliao Basin, China

open access: yesPetroleum Exploration and Development
The temperature-pressure history of the organic-rich shale in the Cretaceous Qingshankou Formation in the northern Songliao Basin was reconstructed through comprehensive analyses, including field tests, paleo-heat flow reconstruction, overpressure ...
Bo LIU   +6 more
doaj   +1 more source

High diversity in the sauropod dinosaur fauna of the Early Lower Cretaceous Kirkwood Formation of South Africa: Implications for the Jurassic–Cretaceous transition [PDF]

open access: yes, 2015
The Kirkwood Formation of South Africa has long been recognised as having the potential to fill an important gap in the Mesozoic terrestrial fossil record.
Choiniere, JN   +3 more
core   +1 more source

Several issues worthy of attention in current lacustrine shale oil exploration and development

open access: yesPetroleum Exploration and Development, 2021
Based on the current research status of shale oil exploration and development at home and abroad, combing the field observations, dissection of typical shale oil regions, analysis and testing of organic-rich shale samples, etc., we compare the ...
Zhijun JIN   +3 more
doaj   +1 more source

Whole petroleum system and hydrocarbon accumulation model in shallow and medium strata in northern Songliao Basin, NE China

open access: yesPetroleum Exploration and Development, 2023
Based on the oil and gas exploration practice in the Songliao Basin, combined with the latest exploration and development data such as seismic, well logging and geochemistry, the basic geological conditions, oil and gas types and distribution ...
He ZHANG   +8 more
doaj   +1 more source

Iron–Phosphorus–Carbon Coupled Cycling in Lacustrine System of Ordos Basin During the Middle Triassic

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Widespread organic‐rich shales are associated with perturbations in productivity or preservation conditions; however, the major controlling factors, especially the phosphorus (P) and iron (Fe) interactions and their impacts on organic carbon burial in the paleolake ecosystem remain poorly understood.
Bo Wang   +7 more
wiley   +1 more source

Study on Hydraulic Fracture Propagation of Strong Heterogeneous Shale Based on Stress‐Seepage Damage Coupling Model

open access: yesEnergy Science &Engineering, Volume 13, Issue 1, Page 309-322, January 2025.
The stress model of rock in the hydraulic fracturing process is developed to study the behavior of hydraulic fracture propagation in strong heterogeneous shale under the coupled action of stress and seepage. In heterogeneous shale reservoirs, strong heterogeneity is the main factor limiting the height propagation of hydraulic fractures.
Wei Liu   +4 more
wiley   +1 more source

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