Mineralogy and Element Geochemistry of Oil Shales in the Lower Cretaceous Qingshankou Formation of the Southern Songliao Basin, Northeast China: Implications of Provenance, Tectonic Setting, and Paleoenvironment

2021 ◽  
Vol 5 (2) ◽  
pp. 365-380
Author(s):  
Fei Hu ◽  
Qingtao Meng ◽  
Zhaojun Liu
Keyword(s):  
Lower Cretaceous ◽  
Northeast China ◽  
Tectonic Setting ◽  
Songliao Basin ◽  
Element Geochemistry ◽  
Oil Shales

scholarly journals The Cretaceous stratigraphy, Songliao Basin, Northeast China: Constrains from drillings and geophysics

2020 ◽  
Vol 12 (1) ◽  
pp. 1212-1223
Author(s):  
Zhihe Xu ◽  
Qinglin Xu ◽  
Aitao Liu ◽  
Naichen Wang ◽  
Guangxiang Li ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Northeast China ◽  
Tectonic Setting ◽  
Petroleum Industry ◽  
Sedimentary Facies ◽  
Songliao Basin ◽  
Stratigraphic Correlation ◽  
Environmental Evolution ◽  
Scientific Drilling ◽  
Geothermal Drilling

AbstractThe Cretaceous nonmarine sedimentary strata are widespread in Songliao Basin, Northeast China. As the largest oil producer in China, an abundance of data has been generated by the petroleum industry, including sedimentology, seismology, geochemistry, and geochronology in the Songliao Basin. This article reviews the achievements in China Cretaceous Continental Scientific Drilling SK and presents the new results of the China Continental Geothermal Drilling SR1 in stratigraphy and geophysics. The results allow us to establish the relationships among SK-1, SK-2, and SR1, provide some constrains on the tectonic setting of Songliao Basin, and interpret the sedimentary facies and environmental evolution. After stratigraphic correlation of SK and SR boreholes, the result indicates that the geological boundary between the late Cretaceous Mingshui formation and the Paleogene Yi’an formation is at the depth of 115 m. The magnetotelluric sounding anomaly areas are corresponding with the unconformities, which are equivalent to seismic horizon T03, T1, T2, and T3, respectively. In addition, the typical “steer’s-head” geometry in the magnetotellurics indicates that the SLB has experienced five evolution stages.

Stratigraphy, structure and geochemistry of Archaean supracrustal rocks from Oqaatsut and Naajaat Qaqqaat, north-east Disko Bugt, West Greenland

1999 ◽  
pp. 65-78
Author(s):  
Henrik Rasmussen ◽  
Lars Frimodt Pedersen
Keyword(s):  
Tectonic Setting ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
West Greenland ◽  
North West ◽  
North East ◽  
Metavolcanic Rocks ◽  
Arc Setting ◽  
Area North ◽  
Back Arc

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Rasmussen, H., & Frimodt Pedersen, L. (1999). Stratigraphy, structure and geochemistry of Archaean supracrustal rocks from Oqaatsut and Naajaat Qaqqaat, north-east Disko Bugt, West Greenland. Geology of Greenland Survey Bulletin, 181, 65-78. https://doi.org/10.34194/ggub.v181.5114 _______________ Two Archaean supracrustal sequences in the area north-east of Disko Bugt, c. 1950 and c. 800 m in thickness, are dominated by pelitic and semipelitic mica schists, interlayered with basic metavolcanic rocks. A polymict conglomerate occurs locally at the base of one of the sequences. One of the supracrustal sequences has undergone four phases of deformation; the other three phases. In both sequences an early phase, now represented by isoclinal folds, was followed by north-west-directed thrusting. A penetrative deformation represented by upright to steeply inclined folds is only recognised in one of the sequences. Steep, brittle N–S and NW–SE striking faults transect all rock units including late stage dolerites and lamprophyres. Investigation of major- and trace-element geochemistry based on discrimination diagrams for tectonic setting suggests that both metasediments and metavolcanic rocks were deposited in an environment similar to a modern back-arc setting.

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