Objective Paleosols in terrestrial deposits provide important insight into paleoclimate and tectonic events(Gong Hujun et al., 2017). The Late Cretaceous continental red bed in the Songliao Basin of NE China records t...Objective Paleosols in terrestrial deposits provide important insight into paleoclimate and tectonic events(Gong Hujun et al., 2017). The Late Cretaceous continental red bed in the Songliao Basin of NE China records the paleoclimate characteristics during the Cretaceous greenhouse period. A series of data has been obtained from cores in continental scientific drilling wells(Wang, 2013). However, few investigations have reported on paleoclimatic and tectonic展开更多
The basement of the Songliao Basin is mainly composed of slightly-metamorphosed or unmetamorphosed Paleozoic strata, granites and gneiss. Petrographical studies indicate that the gneiss was originally the granitic int...The basement of the Songliao Basin is mainly composed of slightly-metamorphosed or unmetamorphosed Paleozoic strata, granites and gneiss. Petrographical studies indicate that the gneiss was originally the granitic intrusions which were deformed in the later stage. One undeformed granitic rock sample gives a U-Pb age of (305+++++++++++2) Ma, and the mylonitic granite yields a U-Pb age of (165++++++++3) Ma. Both of the two samples contain no inherited zircon, which suggests that there is no large-scale Precambrian crystalline basement beneath the Songliao Basin.展开更多
基金funded by the “Major Science and Technology Projects of the CNPC (grant No. 2016B-0401)”
文摘Objective Paleosols in terrestrial deposits provide important insight into paleoclimate and tectonic events(Gong Hujun et al., 2017). The Late Cretaceous continental red bed in the Songliao Basin of NE China records the paleoclimate characteristics during the Cretaceous greenhouse period. A series of data has been obtained from cores in continental scientific drilling wells(Wang, 2013). However, few investigations have reported on paleoclimatic and tectonic
文摘The basement of the Songliao Basin is mainly composed of slightly-metamorphosed or unmetamorphosed Paleozoic strata, granites and gneiss. Petrographical studies indicate that the gneiss was originally the granitic intrusions which were deformed in the later stage. One undeformed granitic rock sample gives a U-Pb age of (305+++++++++++2) Ma, and the mylonitic granite yields a U-Pb age of (165++++++++3) Ma. Both of the two samples contain no inherited zircon, which suggests that there is no large-scale Precambrian crystalline basement beneath the Songliao Basin.
