In the Songliao Basin, the existence of lower Mesozoic strata remains a debatable issue. Previous studies indicated the absence of Triassic to Lower and Middle Jurassic strata in northeastern China because of uplift a...In the Songliao Basin, the existence of lower Mesozoic strata remains a debatable issue. Previous studies indicated the absence of Triassic to Lower and Middle Jurassic strata in northeastern China because of uplift and erosion events associated with the return of geo-synclinal folds and orogenic movement during the Late Permian-Early Jurassic. To date, geochronological studies of intrusive and metamorphic rocks in the basement of the Songliao Basin have also confirmed Carboniferous, Permian, and Late Jurassic ages for the basement formations in general [1-4]. In the International Continental Scientific Drilling Project (ICDP) in the Songliao Basin, radiometric dating has been carried out for the entire drilling core of the SK-2 east borehole. As a result, we have discovered Triassic volcanic-sedimentary strata in the basement of the Songliao Basin.展开更多
The Songliao Basin is one of the largest non-marine petroliferous basins in the globally and contains nearly complete Cretaceous terrestrial sedimentary records[1,2].The Shahezi Formation,named after Shahezi Village,C...The Songliao Basin is one of the largest non-marine petroliferous basins in the globally and contains nearly complete Cretaceous terrestrial sedimentary records[1,2].The Shahezi Formation,named after Shahezi Village,Changtu County,Liaoning Province,is a thick terrestrial clastic sedimentary succession deposited during the rift period of the Songliao Basin[1].Accordingly,it is significant for research on initial basin history restoration and global continental–marine stratigraphic correlation,to certificate the deposition time of the Shahezi Formation[2–4].展开更多
基金supported by the National Natural Science Foundation of China(41790453)the China Geological Survey Program(DD20189702)the Chongqing Research Program of Basic Research and Frontier Technology(cstc2017jcyjAX0456)
文摘In the Songliao Basin, the existence of lower Mesozoic strata remains a debatable issue. Previous studies indicated the absence of Triassic to Lower and Middle Jurassic strata in northeastern China because of uplift and erosion events associated with the return of geo-synclinal folds and orogenic movement during the Late Permian-Early Jurassic. To date, geochronological studies of intrusive and metamorphic rocks in the basement of the Songliao Basin have also confirmed Carboniferous, Permian, and Late Jurassic ages for the basement formations in general [1-4]. In the International Continental Scientific Drilling Project (ICDP) in the Songliao Basin, radiometric dating has been carried out for the entire drilling core of the SK-2 east borehole. As a result, we have discovered Triassic volcanic-sedimentary strata in the basement of the Songliao Basin.
基金This work was supported by the National Natural Science Foundation of China(41790453)the National Key Research&Development Program of China(2019YFC0605402)the China Geological Survey Program(DD20190010 and DD20160207)。
文摘The Songliao Basin is one of the largest non-marine petroliferous basins in the globally and contains nearly complete Cretaceous terrestrial sedimentary records[1,2].The Shahezi Formation,named after Shahezi Village,Changtu County,Liaoning Province,is a thick terrestrial clastic sedimentary succession deposited during the rift period of the Songliao Basin[1].Accordingly,it is significant for research on initial basin history restoration and global continental–marine stratigraphic correlation,to certificate the deposition time of the Shahezi Formation[2–4].
