Discovery of Triassic volcanic-sedimentary strata in the basement of Songliao Basin

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（10）
• 页码范围: 644-646
• 页数: 3页
• 语种: 英文

摘要

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.